86 CJ-7 Carb
Guest
Posts: n/a
Re: 86 CJ-7 Carb
In message <shk5tvs1bhensised8i8vmopafrbmiohhb@4ax.com>, "bllsht" wrote:
>In message <3FD24D57.EDD54725@sympatico.ca>, "Mike Romain" wrote:
>
>>bllsht wrote:
>>>
>>> In message <3FD2175A.FCE4CCC4@sympatico.ca>, "Mike Romain" wrote:
>>>
>>> >I can't see how what you are describing works...
>>> >
>>> >The only way a stock system will build up any pressure in the gas lines
>>> >is if the plumbing is done incorrectly.
>>> >
>>> >Properly plumbed, the gas filter in front of the carb has two outlets.
>>> >One outlet, the center one, goes to the carb and when the carb float
>>> >shuts off the gas flow, the excess gas gets pumped back to the gas tank
>>> >via the return line or the top outlet on the filter.
>>> >
>>> >This keeps the gas pressure down to close to 0 psi. The carb will
>>> >actually run with a gravity feed from a gas can sitting on the hood if
>>> >all else fails for a trail fix.
>>>
>>> Actually, they operate around 3-5 psi if I remember correctly. There is an
>>> orifice in the return nipple of the filter that restricts fuel flow back to the
>>> tank.
>>
>>Ok, I have noticed the filter bypass tube will blow through when the
>>center one to the carb is dirty and blocked, but didn't think that much
>>pressure was needed. Seemed like the difference between the tube sizes
>>for a restriction, hard to tell just blowing air though.
>
>Yeah, it's more than just the difference in tube sizes. The restrictor is quite
>a bit smaller than the actual tube.
>
>>
>>Now I see why one might need a regulator, thanks.
>>
>>Gent below sounds like he blocked the return line. The filter will
>>bleed off to 0 psi almost instantly otherwise.
>>
>>I wonder if you could drill out the restriction in the filter return
>>line to lower the pressure fast and cheap or if it just a tube size
>>restriction?
>
>I don't see why you couldn't do that. It would probably work fine.
Might want to do it in steps though. Not enough pressure could be a real
problem.
>
>>
>>Mike
>>
>>>
>>> >
>>> >Now if you have blocked the return line, then the pump can build up
>>> >pressure, but it also will vapor lock like a bugger in really hot
>>> >weather.
>>> >
>>> >Mike
>>> >86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>>> >88 Cherokee 235 BFG AT's
>>> >
>>> >Jet wrote:
>>> >>
>>> >> I just put on a Weber k-551 on my 86 cj7 that I bought from Collins bros.
>>> >> for about $300. now my jeep starts great cold or hot, idles and stopped
>>> >> blowing out black smoke. one thing I had to add on my jeep was a holley low
>>> >> fuel pressure regulator (around $25 from jegs.com) because the weber need
>>> >> under 3.5 psi fuel pressure and my jeep was 5.5 psi so I set the regulator
>>> >> at 2.5 psi. when the weber was running with 5.5 psi the carb was bleeding
>>> >> off the excess pressure into the carb and causing it to blow black smoke
>>> >> when I started it when it was hot. carmine
>>> >>
>>> >> "Kenneth Reichenbach Jr." <kenwr@enter.net> wrote in message
>>> >> news:eGgAb.290$MY.221738@monger.newsread.com...
>>> >> > I am in need of a carb for a 86 CJ-7 6 cy. Any leads would be great. Can't
>>> >> > find one anywhere!
>>> >> >
>>> >> >
>In message <3FD24D57.EDD54725@sympatico.ca>, "Mike Romain" wrote:
>
>>bllsht wrote:
>>>
>>> In message <3FD2175A.FCE4CCC4@sympatico.ca>, "Mike Romain" wrote:
>>>
>>> >I can't see how what you are describing works...
>>> >
>>> >The only way a stock system will build up any pressure in the gas lines
>>> >is if the plumbing is done incorrectly.
>>> >
>>> >Properly plumbed, the gas filter in front of the carb has two outlets.
>>> >One outlet, the center one, goes to the carb and when the carb float
>>> >shuts off the gas flow, the excess gas gets pumped back to the gas tank
>>> >via the return line or the top outlet on the filter.
>>> >
>>> >This keeps the gas pressure down to close to 0 psi. The carb will
>>> >actually run with a gravity feed from a gas can sitting on the hood if
>>> >all else fails for a trail fix.
>>>
>>> Actually, they operate around 3-5 psi if I remember correctly. There is an
>>> orifice in the return nipple of the filter that restricts fuel flow back to the
>>> tank.
>>
>>Ok, I have noticed the filter bypass tube will blow through when the
>>center one to the carb is dirty and blocked, but didn't think that much
>>pressure was needed. Seemed like the difference between the tube sizes
>>for a restriction, hard to tell just blowing air though.
>
>Yeah, it's more than just the difference in tube sizes. The restrictor is quite
>a bit smaller than the actual tube.
>
>>
>>Now I see why one might need a regulator, thanks.
>>
>>Gent below sounds like he blocked the return line. The filter will
>>bleed off to 0 psi almost instantly otherwise.
>>
>>I wonder if you could drill out the restriction in the filter return
>>line to lower the pressure fast and cheap or if it just a tube size
>>restriction?
>
>I don't see why you couldn't do that. It would probably work fine.
Might want to do it in steps though. Not enough pressure could be a real
problem.
>
>>
>>Mike
>>
>>>
>>> >
>>> >Now if you have blocked the return line, then the pump can build up
>>> >pressure, but it also will vapor lock like a bugger in really hot
>>> >weather.
>>> >
>>> >Mike
>>> >86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
>>> >88 Cherokee 235 BFG AT's
>>> >
>>> >Jet wrote:
>>> >>
>>> >> I just put on a Weber k-551 on my 86 cj7 that I bought from Collins bros.
>>> >> for about $300. now my jeep starts great cold or hot, idles and stopped
>>> >> blowing out black smoke. one thing I had to add on my jeep was a holley low
>>> >> fuel pressure regulator (around $25 from jegs.com) because the weber need
>>> >> under 3.5 psi fuel pressure and my jeep was 5.5 psi so I set the regulator
>>> >> at 2.5 psi. when the weber was running with 5.5 psi the carb was bleeding
>>> >> off the excess pressure into the carb and causing it to blow black smoke
>>> >> when I started it when it was hot. carmine
>>> >>
>>> >> "Kenneth Reichenbach Jr." <kenwr@enter.net> wrote in message
>>> >> news:eGgAb.290$MY.221738@monger.newsread.com...
>>> >> > I am in need of a carb for a 86 CJ-7 6 cy. Any leads would be great. Can't
>>> >> > find one anywhere!
>>> >> >
>>> >> >
Guest
Posts: n/a
Re: 86 CJ-7 Carb
bllsht wrote:
>
> In message <shk5tvs1bhensised8i8vmopafrbmiohhb@4ax.com>, "bllsht" wrote:
>
> >In message <3FD24D57.EDD54725@sympatico.ca>, "Mike Romain" wrote:
> >
> >>bllsht wrote:
> >>>
> >>> In message <3FD2175A.FCE4CCC4@sympatico.ca>, "Mike Romain" wrote:
> >>>
> >>> >I can't see how what you are describing works...
> >>> >
> >>> >The only way a stock system will build up any pressure in the gas lines
> >>> >is if the plumbing is done incorrectly.
> >>> >
> >>> >Properly plumbed, the gas filter in front of the carb has two outlets.
> >>> >One outlet, the center one, goes to the carb and when the carb float
> >>> >shuts off the gas flow, the excess gas gets pumped back to the gas tank
> >>> >via the return line or the top outlet on the filter.
> >>> >
> >>> >This keeps the gas pressure down to close to 0 psi. The carb will
> >>> >actually run with a gravity feed from a gas can sitting on the hood if
> >>> >all else fails for a trail fix.
> >>>
> >>> Actually, they operate around 3-5 psi if I remember correctly. There is an
> >>> orifice in the return nipple of the filter that restricts fuel flow back to the
> >>> tank.
> >>
> >>Ok, I have noticed the filter bypass tube will blow through when the
> >>center one to the carb is dirty and blocked, but didn't think that much
> >>pressure was needed. Seemed like the difference between the tube sizes
> >>for a restriction, hard to tell just blowing air though.
> >
> >Yeah, it's more than just the difference in tube sizes. The restrictor is quite
> >a bit smaller than the actual tube.
> >
> >>
> >>Now I see why one might need a regulator, thanks.
> >>
> >>Gent below sounds like he blocked the return line. The filter will
> >>bleed off to 0 psi almost instantly otherwise.
> >>
> >>I wonder if you could drill out the restriction in the filter return
> >>line to lower the pressure fast and cheap or if it just a tube size
> >>restriction?
> >
> >I don't see why you couldn't do that. It would probably work fine.
>
> Might want to do it in steps though. Not enough pressure could be a real
> problem.
I kinda had that figured. I was thinking on seeing the size which holds
the 5 lb and doing some fluid math to open it up a certain percent and
see what that does if I ever needed to do it. Or if anyone ever asks I
can suggest that....
Thanks again.
Mike
>
> >
> >>
> >>Mike
> >>
> >>>
> >>> >
> >>> >Now if you have blocked the return line, then the pump can build up
> >>> >pressure, but it also will vapor lock like a bugger in really hot
> >>> >weather.
> >>> >
> >>> >Mike
> >>> >86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> >>> >88 Cherokee 235 BFG AT's
> >>> >
> >>> >Jet wrote:
> >>> >>
> >>> >> I just put on a Weber k-551 on my 86 cj7 that I bought from Collins bros.
> >>> >> for about $300. now my jeep starts great cold or hot, idles and stopped
> >>> >> blowing out black smoke. one thing I had to add on my jeep was a holley low
> >>> >> fuel pressure regulator (around $25 from jegs.com) because the weber need
> >>> >> under 3.5 psi fuel pressure and my jeep was 5.5 psi so I set the regulator
> >>> >> at 2.5 psi. when the weber was running with 5.5 psi the carb was bleeding
> >>> >> off the excess pressure into the carb and causing it to blow black smoke
> >>> >> when I started it when it was hot. carmine
> >>> >>
> >>> >> "Kenneth Reichenbach Jr." <kenwr@enter.net> wrote in message
> >>> >> news:eGgAb.290$MY.221738@monger.newsread.com...
> >>> >> > I am in need of a carb for a 86 CJ-7 6 cy. Any leads would be great. Can't
> >>> >> > find one anywhere!
> >>> >> >
> >>> >> >
>
> In message <shk5tvs1bhensised8i8vmopafrbmiohhb@4ax.com>, "bllsht" wrote:
>
> >In message <3FD24D57.EDD54725@sympatico.ca>, "Mike Romain" wrote:
> >
> >>bllsht wrote:
> >>>
> >>> In message <3FD2175A.FCE4CCC4@sympatico.ca>, "Mike Romain" wrote:
> >>>
> >>> >I can't see how what you are describing works...
> >>> >
> >>> >The only way a stock system will build up any pressure in the gas lines
> >>> >is if the plumbing is done incorrectly.
> >>> >
> >>> >Properly plumbed, the gas filter in front of the carb has two outlets.
> >>> >One outlet, the center one, goes to the carb and when the carb float
> >>> >shuts off the gas flow, the excess gas gets pumped back to the gas tank
> >>> >via the return line or the top outlet on the filter.
> >>> >
> >>> >This keeps the gas pressure down to close to 0 psi. The carb will
> >>> >actually run with a gravity feed from a gas can sitting on the hood if
> >>> >all else fails for a trail fix.
> >>>
> >>> Actually, they operate around 3-5 psi if I remember correctly. There is an
> >>> orifice in the return nipple of the filter that restricts fuel flow back to the
> >>> tank.
> >>
> >>Ok, I have noticed the filter bypass tube will blow through when the
> >>center one to the carb is dirty and blocked, but didn't think that much
> >>pressure was needed. Seemed like the difference between the tube sizes
> >>for a restriction, hard to tell just blowing air though.
> >
> >Yeah, it's more than just the difference in tube sizes. The restrictor is quite
> >a bit smaller than the actual tube.
> >
> >>
> >>Now I see why one might need a regulator, thanks.
> >>
> >>Gent below sounds like he blocked the return line. The filter will
> >>bleed off to 0 psi almost instantly otherwise.
> >>
> >>I wonder if you could drill out the restriction in the filter return
> >>line to lower the pressure fast and cheap or if it just a tube size
> >>restriction?
> >
> >I don't see why you couldn't do that. It would probably work fine.
>
> Might want to do it in steps though. Not enough pressure could be a real
> problem.
I kinda had that figured. I was thinking on seeing the size which holds
the 5 lb and doing some fluid math to open it up a certain percent and
see what that does if I ever needed to do it. Or if anyone ever asks I
can suggest that....
Thanks again.
Mike
>
> >
> >>
> >>Mike
> >>
> >>>
> >>> >
> >>> >Now if you have blocked the return line, then the pump can build up
> >>> >pressure, but it also will vapor lock like a bugger in really hot
> >>> >weather.
> >>> >
> >>> >Mike
> >>> >86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> >>> >88 Cherokee 235 BFG AT's
> >>> >
> >>> >Jet wrote:
> >>> >>
> >>> >> I just put on a Weber k-551 on my 86 cj7 that I bought from Collins bros.
> >>> >> for about $300. now my jeep starts great cold or hot, idles and stopped
> >>> >> blowing out black smoke. one thing I had to add on my jeep was a holley low
> >>> >> fuel pressure regulator (around $25 from jegs.com) because the weber need
> >>> >> under 3.5 psi fuel pressure and my jeep was 5.5 psi so I set the regulator
> >>> >> at 2.5 psi. when the weber was running with 5.5 psi the carb was bleeding
> >>> >> off the excess pressure into the carb and causing it to blow black smoke
> >>> >> when I started it when it was hot. carmine
> >>> >>
> >>> >> "Kenneth Reichenbach Jr." <kenwr@enter.net> wrote in message
> >>> >> news:eGgAb.290$MY.221738@monger.newsread.com...
> >>> >> > I am in need of a carb for a 86 CJ-7 6 cy. Any leads would be great. Can't
> >>> >> > find one anywhere!
> >>> >> >
> >>> >> >
Guest
Posts: n/a
Re: 86 CJ-7 Carb
bllsht wrote:
>
> In message <shk5tvs1bhensised8i8vmopafrbmiohhb@4ax.com>, "bllsht" wrote:
>
> >In message <3FD24D57.EDD54725@sympatico.ca>, "Mike Romain" wrote:
> >
> >>bllsht wrote:
> >>>
> >>> In message <3FD2175A.FCE4CCC4@sympatico.ca>, "Mike Romain" wrote:
> >>>
> >>> >I can't see how what you are describing works...
> >>> >
> >>> >The only way a stock system will build up any pressure in the gas lines
> >>> >is if the plumbing is done incorrectly.
> >>> >
> >>> >Properly plumbed, the gas filter in front of the carb has two outlets.
> >>> >One outlet, the center one, goes to the carb and when the carb float
> >>> >shuts off the gas flow, the excess gas gets pumped back to the gas tank
> >>> >via the return line or the top outlet on the filter.
> >>> >
> >>> >This keeps the gas pressure down to close to 0 psi. The carb will
> >>> >actually run with a gravity feed from a gas can sitting on the hood if
> >>> >all else fails for a trail fix.
> >>>
> >>> Actually, they operate around 3-5 psi if I remember correctly. There is an
> >>> orifice in the return nipple of the filter that restricts fuel flow back to the
> >>> tank.
> >>
> >>Ok, I have noticed the filter bypass tube will blow through when the
> >>center one to the carb is dirty and blocked, but didn't think that much
> >>pressure was needed. Seemed like the difference between the tube sizes
> >>for a restriction, hard to tell just blowing air though.
> >
> >Yeah, it's more than just the difference in tube sizes. The restrictor is quite
> >a bit smaller than the actual tube.
> >
> >>
> >>Now I see why one might need a regulator, thanks.
> >>
> >>Gent below sounds like he blocked the return line. The filter will
> >>bleed off to 0 psi almost instantly otherwise.
> >>
> >>I wonder if you could drill out the restriction in the filter return
> >>line to lower the pressure fast and cheap or if it just a tube size
> >>restriction?
> >
> >I don't see why you couldn't do that. It would probably work fine.
>
> Might want to do it in steps though. Not enough pressure could be a real
> problem.
I kinda had that figured. I was thinking on seeing the size which holds
the 5 lb and doing some fluid math to open it up a certain percent and
see what that does if I ever needed to do it. Or if anyone ever asks I
can suggest that....
Thanks again.
Mike
>
> >
> >>
> >>Mike
> >>
> >>>
> >>> >
> >>> >Now if you have blocked the return line, then the pump can build up
> >>> >pressure, but it also will vapor lock like a bugger in really hot
> >>> >weather.
> >>> >
> >>> >Mike
> >>> >86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> >>> >88 Cherokee 235 BFG AT's
> >>> >
> >>> >Jet wrote:
> >>> >>
> >>> >> I just put on a Weber k-551 on my 86 cj7 that I bought from Collins bros.
> >>> >> for about $300. now my jeep starts great cold or hot, idles and stopped
> >>> >> blowing out black smoke. one thing I had to add on my jeep was a holley low
> >>> >> fuel pressure regulator (around $25 from jegs.com) because the weber need
> >>> >> under 3.5 psi fuel pressure and my jeep was 5.5 psi so I set the regulator
> >>> >> at 2.5 psi. when the weber was running with 5.5 psi the carb was bleeding
> >>> >> off the excess pressure into the carb and causing it to blow black smoke
> >>> >> when I started it when it was hot. carmine
> >>> >>
> >>> >> "Kenneth Reichenbach Jr." <kenwr@enter.net> wrote in message
> >>> >> news:eGgAb.290$MY.221738@monger.newsread.com...
> >>> >> > I am in need of a carb for a 86 CJ-7 6 cy. Any leads would be great. Can't
> >>> >> > find one anywhere!
> >>> >> >
> >>> >> >
>
> In message <shk5tvs1bhensised8i8vmopafrbmiohhb@4ax.com>, "bllsht" wrote:
>
> >In message <3FD24D57.EDD54725@sympatico.ca>, "Mike Romain" wrote:
> >
> >>bllsht wrote:
> >>>
> >>> In message <3FD2175A.FCE4CCC4@sympatico.ca>, "Mike Romain" wrote:
> >>>
> >>> >I can't see how what you are describing works...
> >>> >
> >>> >The only way a stock system will build up any pressure in the gas lines
> >>> >is if the plumbing is done incorrectly.
> >>> >
> >>> >Properly plumbed, the gas filter in front of the carb has two outlets.
> >>> >One outlet, the center one, goes to the carb and when the carb float
> >>> >shuts off the gas flow, the excess gas gets pumped back to the gas tank
> >>> >via the return line or the top outlet on the filter.
> >>> >
> >>> >This keeps the gas pressure down to close to 0 psi. The carb will
> >>> >actually run with a gravity feed from a gas can sitting on the hood if
> >>> >all else fails for a trail fix.
> >>>
> >>> Actually, they operate around 3-5 psi if I remember correctly. There is an
> >>> orifice in the return nipple of the filter that restricts fuel flow back to the
> >>> tank.
> >>
> >>Ok, I have noticed the filter bypass tube will blow through when the
> >>center one to the carb is dirty and blocked, but didn't think that much
> >>pressure was needed. Seemed like the difference between the tube sizes
> >>for a restriction, hard to tell just blowing air though.
> >
> >Yeah, it's more than just the difference in tube sizes. The restrictor is quite
> >a bit smaller than the actual tube.
> >
> >>
> >>Now I see why one might need a regulator, thanks.
> >>
> >>Gent below sounds like he blocked the return line. The filter will
> >>bleed off to 0 psi almost instantly otherwise.
> >>
> >>I wonder if you could drill out the restriction in the filter return
> >>line to lower the pressure fast and cheap or if it just a tube size
> >>restriction?
> >
> >I don't see why you couldn't do that. It would probably work fine.
>
> Might want to do it in steps though. Not enough pressure could be a real
> problem.
I kinda had that figured. I was thinking on seeing the size which holds
the 5 lb and doing some fluid math to open it up a certain percent and
see what that does if I ever needed to do it. Or if anyone ever asks I
can suggest that....
Thanks again.
Mike
>
> >
> >>
> >>Mike
> >>
> >>>
> >>> >
> >>> >Now if you have blocked the return line, then the pump can build up
> >>> >pressure, but it also will vapor lock like a bugger in really hot
> >>> >weather.
> >>> >
> >>> >Mike
> >>> >86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> >>> >88 Cherokee 235 BFG AT's
> >>> >
> >>> >Jet wrote:
> >>> >>
> >>> >> I just put on a Weber k-551 on my 86 cj7 that I bought from Collins bros.
> >>> >> for about $300. now my jeep starts great cold or hot, idles and stopped
> >>> >> blowing out black smoke. one thing I had to add on my jeep was a holley low
> >>> >> fuel pressure regulator (around $25 from jegs.com) because the weber need
> >>> >> under 3.5 psi fuel pressure and my jeep was 5.5 psi so I set the regulator
> >>> >> at 2.5 psi. when the weber was running with 5.5 psi the carb was bleeding
> >>> >> off the excess pressure into the carb and causing it to blow black smoke
> >>> >> when I started it when it was hot. carmine
> >>> >>
> >>> >> "Kenneth Reichenbach Jr." <kenwr@enter.net> wrote in message
> >>> >> news:eGgAb.290$MY.221738@monger.newsread.com...
> >>> >> > I am in need of a carb for a 86 CJ-7 6 cy. Any leads would be great. Can't
> >>> >> > find one anywhere!
> >>> >> >
> >>> >> >
Guest
Posts: n/a
Re: 86 CJ-7 Carb
bllsht wrote:
>
> In message <shk5tvs1bhensised8i8vmopafrbmiohhb@4ax.com>, "bllsht" wrote:
>
> >In message <3FD24D57.EDD54725@sympatico.ca>, "Mike Romain" wrote:
> >
> >>bllsht wrote:
> >>>
> >>> In message <3FD2175A.FCE4CCC4@sympatico.ca>, "Mike Romain" wrote:
> >>>
> >>> >I can't see how what you are describing works...
> >>> >
> >>> >The only way a stock system will build up any pressure in the gas lines
> >>> >is if the plumbing is done incorrectly.
> >>> >
> >>> >Properly plumbed, the gas filter in front of the carb has two outlets.
> >>> >One outlet, the center one, goes to the carb and when the carb float
> >>> >shuts off the gas flow, the excess gas gets pumped back to the gas tank
> >>> >via the return line or the top outlet on the filter.
> >>> >
> >>> >This keeps the gas pressure down to close to 0 psi. The carb will
> >>> >actually run with a gravity feed from a gas can sitting on the hood if
> >>> >all else fails for a trail fix.
> >>>
> >>> Actually, they operate around 3-5 psi if I remember correctly. There is an
> >>> orifice in the return nipple of the filter that restricts fuel flow back to the
> >>> tank.
> >>
> >>Ok, I have noticed the filter bypass tube will blow through when the
> >>center one to the carb is dirty and blocked, but didn't think that much
> >>pressure was needed. Seemed like the difference between the tube sizes
> >>for a restriction, hard to tell just blowing air though.
> >
> >Yeah, it's more than just the difference in tube sizes. The restrictor is quite
> >a bit smaller than the actual tube.
> >
> >>
> >>Now I see why one might need a regulator, thanks.
> >>
> >>Gent below sounds like he blocked the return line. The filter will
> >>bleed off to 0 psi almost instantly otherwise.
> >>
> >>I wonder if you could drill out the restriction in the filter return
> >>line to lower the pressure fast and cheap or if it just a tube size
> >>restriction?
> >
> >I don't see why you couldn't do that. It would probably work fine.
>
> Might want to do it in steps though. Not enough pressure could be a real
> problem.
I kinda had that figured. I was thinking on seeing the size which holds
the 5 lb and doing some fluid math to open it up a certain percent and
see what that does if I ever needed to do it. Or if anyone ever asks I
can suggest that....
Thanks again.
Mike
>
> >
> >>
> >>Mike
> >>
> >>>
> >>> >
> >>> >Now if you have blocked the return line, then the pump can build up
> >>> >pressure, but it also will vapor lock like a bugger in really hot
> >>> >weather.
> >>> >
> >>> >Mike
> >>> >86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> >>> >88 Cherokee 235 BFG AT's
> >>> >
> >>> >Jet wrote:
> >>> >>
> >>> >> I just put on a Weber k-551 on my 86 cj7 that I bought from Collins bros.
> >>> >> for about $300. now my jeep starts great cold or hot, idles and stopped
> >>> >> blowing out black smoke. one thing I had to add on my jeep was a holley low
> >>> >> fuel pressure regulator (around $25 from jegs.com) because the weber need
> >>> >> under 3.5 psi fuel pressure and my jeep was 5.5 psi so I set the regulator
> >>> >> at 2.5 psi. when the weber was running with 5.5 psi the carb was bleeding
> >>> >> off the excess pressure into the carb and causing it to blow black smoke
> >>> >> when I started it when it was hot. carmine
> >>> >>
> >>> >> "Kenneth Reichenbach Jr." <kenwr@enter.net> wrote in message
> >>> >> news:eGgAb.290$MY.221738@monger.newsread.com...
> >>> >> > I am in need of a carb for a 86 CJ-7 6 cy. Any leads would be great. Can't
> >>> >> > find one anywhere!
> >>> >> >
> >>> >> >
>
> In message <shk5tvs1bhensised8i8vmopafrbmiohhb@4ax.com>, "bllsht" wrote:
>
> >In message <3FD24D57.EDD54725@sympatico.ca>, "Mike Romain" wrote:
> >
> >>bllsht wrote:
> >>>
> >>> In message <3FD2175A.FCE4CCC4@sympatico.ca>, "Mike Romain" wrote:
> >>>
> >>> >I can't see how what you are describing works...
> >>> >
> >>> >The only way a stock system will build up any pressure in the gas lines
> >>> >is if the plumbing is done incorrectly.
> >>> >
> >>> >Properly plumbed, the gas filter in front of the carb has two outlets.
> >>> >One outlet, the center one, goes to the carb and when the carb float
> >>> >shuts off the gas flow, the excess gas gets pumped back to the gas tank
> >>> >via the return line or the top outlet on the filter.
> >>> >
> >>> >This keeps the gas pressure down to close to 0 psi. The carb will
> >>> >actually run with a gravity feed from a gas can sitting on the hood if
> >>> >all else fails for a trail fix.
> >>>
> >>> Actually, they operate around 3-5 psi if I remember correctly. There is an
> >>> orifice in the return nipple of the filter that restricts fuel flow back to the
> >>> tank.
> >>
> >>Ok, I have noticed the filter bypass tube will blow through when the
> >>center one to the carb is dirty and blocked, but didn't think that much
> >>pressure was needed. Seemed like the difference between the tube sizes
> >>for a restriction, hard to tell just blowing air though.
> >
> >Yeah, it's more than just the difference in tube sizes. The restrictor is quite
> >a bit smaller than the actual tube.
> >
> >>
> >>Now I see why one might need a regulator, thanks.
> >>
> >>Gent below sounds like he blocked the return line. The filter will
> >>bleed off to 0 psi almost instantly otherwise.
> >>
> >>I wonder if you could drill out the restriction in the filter return
> >>line to lower the pressure fast and cheap or if it just a tube size
> >>restriction?
> >
> >I don't see why you couldn't do that. It would probably work fine.
>
> Might want to do it in steps though. Not enough pressure could be a real
> problem.
I kinda had that figured. I was thinking on seeing the size which holds
the 5 lb and doing some fluid math to open it up a certain percent and
see what that does if I ever needed to do it. Or if anyone ever asks I
can suggest that....
Thanks again.
Mike
>
> >
> >>
> >>Mike
> >>
> >>>
> >>> >
> >>> >Now if you have blocked the return line, then the pump can build up
> >>> >pressure, but it also will vapor lock like a bugger in really hot
> >>> >weather.
> >>> >
> >>> >Mike
> >>> >86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> >>> >88 Cherokee 235 BFG AT's
> >>> >
> >>> >Jet wrote:
> >>> >>
> >>> >> I just put on a Weber k-551 on my 86 cj7 that I bought from Collins bros.
> >>> >> for about $300. now my jeep starts great cold or hot, idles and stopped
> >>> >> blowing out black smoke. one thing I had to add on my jeep was a holley low
> >>> >> fuel pressure regulator (around $25 from jegs.com) because the weber need
> >>> >> under 3.5 psi fuel pressure and my jeep was 5.5 psi so I set the regulator
> >>> >> at 2.5 psi. when the weber was running with 5.5 psi the carb was bleeding
> >>> >> off the excess pressure into the carb and causing it to blow black smoke
> >>> >> when I started it when it was hot. carmine
> >>> >>
> >>> >> "Kenneth Reichenbach Jr." <kenwr@enter.net> wrote in message
> >>> >> news:eGgAb.290$MY.221738@monger.newsread.com...
> >>> >> > I am in need of a carb for a 86 CJ-7 6 cy. Any leads would be great. Can't
> >>> >> > find one anywhere!
> >>> >> >
> >>> >> >
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