Emphasis on old.
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/


"Old Crow" <walliscrow@yahoo.com> wrote in message
news:54pr93tt9bnsr1mn97b9agjpsgbrbbs4no@4ax.com...
>
> You're just too young. It's an old mechanic's saying...really.
> --
> Old Crow "Yol Bolsun!"
> '82 FLTC-P "Miss Pearl"
> '95 YJ Rio Grande
> BS#133, SENS, TOMKAT, MAMBM



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Posted via a free Usenet account from http://www.teranews.com

 

The problem is fixed. I'm not 100% sure what it was, but I have a
pretty good idea. The vacuum advance was plugged into manifold vacuum
& had been ever since I can remember. The problem is that the vacuum
advance was bad to begin with, so it was probably never noticed. I
received my new carb today (a Holley 4412) & ensured it was plugged
into ported vacuum this time around. I also timed it by ear + vacuum
this time rather than the light. In the end, I came out with about 12
degrees BTDC initial advance (with the vacuum advance disconnected,
not that it matters now with ported vacuum) instead of the 5 degrees
that my Haynes manual states. Dwell angle is about 40 rather than the
recommended 31 now too. It will stall with anything lower than 35. I
get about 20" vacuum at around 700rpm idle now & it performs better
than I ever remember it when it was running correctly, probably due to
the carb & maybe the headers? Anyway, I wonder what the possibility
is that I have some aftermarket cam with a heavier lift/duration due
to all of these non standard settings required to get it running good.

Once again, I greatly appreciate everyone's help. I doubt I would
have realized it wasn't getting enough advance without everyone's help
& I learned a few things from everyone's experience. I even went out
& bought some Champion truck plugs!

Thanks again guys,

-Matt

 

The problem is fixed. I'm not 100% sure what it was, but I have a
pretty good idea. The vacuum advance was plugged into manifold vacuum
& had been ever since I can remember. The problem is that the vacuum
advance was bad to begin with, so it was probably never noticed. I
received my new carb today (a Holley 4412) & ensured it was plugged
into ported vacuum this time around. I also timed it by ear + vacuum
this time rather than the light. In the end, I came out with about 12
degrees BTDC initial advance (with the vacuum advance disconnected,
not that it matters now with ported vacuum) instead of the 5 degrees
that my Haynes manual states. Dwell angle is about 40 rather than the
recommended 31 now too. It will stall with anything lower than 35. I
get about 20" vacuum at around 700rpm idle now & it performs better
than I ever remember it when it was running correctly, probably due to
the carb & maybe the headers? Anyway, I wonder what the possibility
is that I have some aftermarket cam with a heavier lift/duration due
to all of these non standard settings required to get it running good.

Once again, I greatly appreciate everyone's help. I doubt I would
have realized it wasn't getting enough advance without everyone's help
& I learned a few things from everyone's experience. I even went out
& bought some Champion truck plugs!

Thanks again guys,

-Matt

 

The problem is fixed. I'm not 100% sure what it was, but I have a
pretty good idea. The vacuum advance was plugged into manifold vacuum
& had been ever since I can remember. The problem is that the vacuum
advance was bad to begin with, so it was probably never noticed. I
received my new carb today (a Holley 4412) & ensured it was plugged
into ported vacuum this time around. I also timed it by ear + vacuum
this time rather than the light. In the end, I came out with about 12
degrees BTDC initial advance (with the vacuum advance disconnected,
not that it matters now with ported vacuum) instead of the 5 degrees
that my Haynes manual states. Dwell angle is about 40 rather than the
recommended 31 now too. It will stall with anything lower than 35. I
get about 20" vacuum at around 700rpm idle now & it performs better
than I ever remember it when it was running correctly, probably due to
the carb & maybe the headers? Anyway, I wonder what the possibility
is that I have some aftermarket cam with a heavier lift/duration due
to all of these non standard settings required to get it running good.

Once again, I greatly appreciate everyone's help. I doubt I would
have realized it wasn't getting enough advance without everyone's help
& I learned a few things from everyone's experience. I even went out
& bought some Champion truck plugs!

Thanks again guys,

-Matt

 

The problem is fixed. I'm not 100% sure what it was, but I have a
pretty good idea. The vacuum advance was plugged into manifold vacuum
& had been ever since I can remember. The problem is that the vacuum
advance was bad to begin with, so it was probably never noticed. I
received my new carb today (a Holley 4412) & ensured it was plugged
into ported vacuum this time around. I also timed it by ear + vacuum
this time rather than the light. In the end, I came out with about 12
degrees BTDC initial advance (with the vacuum advance disconnected,
not that it matters now with ported vacuum) instead of the 5 degrees
that my Haynes manual states. Dwell angle is about 40 rather than the
recommended 31 now too. It will stall with anything lower than 35. I
get about 20" vacuum at around 700rpm idle now & it performs better
than I ever remember it when it was running correctly, probably due to
the carb & maybe the headers? Anyway, I wonder what the possibility
is that I have some aftermarket cam with a heavier lift/duration due
to all of these non standard settings required to get it running good.

Once again, I greatly appreciate everyone's help. I doubt I would
have realized it wasn't getting enough advance without everyone's help
& I learned a few things from everyone's experience. I even went out
& bought some Champion truck plugs!

Thanks again guys,

-Matt

 

matthew.nye@gmail.com wrote:
> The problem is fixed. I'm not 100% sure what it was, but I have a
> pretty good idea. The vacuum advance was plugged into manifold vacuum
> & had been ever since I can remember. The problem is that the vacuum
> advance was bad to begin with, so it was probably never noticed. I
> received my new carb today (a Holley 4412) & ensured it was plugged
> into ported vacuum this time around. I also timed it by ear + vacuum
> this time rather than the light. In the end, I came out with about 12
> degrees BTDC initial advance (with the vacuum advance disconnected,
> not that it matters now with ported vacuum) instead of the 5 degrees
> that my Haynes manual states. Dwell angle is about 40 rather than the
> recommended 31 now too. It will stall with anything lower than 35. I
> get about 20" vacuum at around 700rpm idle now & it performs better
> than I ever remember it when it was running correctly, probably due to
> the carb & maybe the headers? Anyway, I wonder what the possibility
> is that I have some aftermarket cam with a heavier lift/duration due
> to all of these non standard settings required to get it running good.
>
> Once again, I greatly appreciate everyone's help. I doubt I would
> have realized it wasn't getting enough advance without everyone's help
> & I learned a few things from everyone's experience. I even went out
> & bought some Champion truck plugs!
>
> Thanks again guys,
>
> -Matt
>

Sounds like you got it pretty much sorted out. I'll lay money that if
you put the 600 back on there now that the timing is correct, or close
to correct, it will run good(assuming it is rebuilt properly). A 500 2
barrel actually flows 350CFM when it is flow rated as the same vacuum
drop as a 4 barrel is rated, so in essence you have half of a 700 4 barrel.

I kind of screwed up on the ported vacuum thing. I normally use manifold
vacuum and modify the distributor for more centrifugal advance. Either
way works.

Also, watch the plug coloring with the 500. they are jetted a little on
the rich side, so you may have to drop them a couple sizes.

Chris

 

matthew.nye@gmail.com wrote:
> The problem is fixed. I'm not 100% sure what it was, but I have a
> pretty good idea. The vacuum advance was plugged into manifold vacuum
> & had been ever since I can remember. The problem is that the vacuum
> advance was bad to begin with, so it was probably never noticed. I
> received my new carb today (a Holley 4412) & ensured it was plugged
> into ported vacuum this time around. I also timed it by ear + vacuum
> this time rather than the light. In the end, I came out with about 12
> degrees BTDC initial advance (with the vacuum advance disconnected,
> not that it matters now with ported vacuum) instead of the 5 degrees
> that my Haynes manual states. Dwell angle is about 40 rather than the
> recommended 31 now too. It will stall with anything lower than 35. I
> get about 20" vacuum at around 700rpm idle now & it performs better
> than I ever remember it when it was running correctly, probably due to
> the carb & maybe the headers? Anyway, I wonder what the possibility
> is that I have some aftermarket cam with a heavier lift/duration due
> to all of these non standard settings required to get it running good.
>
> Once again, I greatly appreciate everyone's help. I doubt I would
> have realized it wasn't getting enough advance without everyone's help
> & I learned a few things from everyone's experience. I even went out
> & bought some Champion truck plugs!
>
> Thanks again guys,
>
> -Matt
>

Sounds like you got it pretty much sorted out. I'll lay money that if
you put the 600 back on there now that the timing is correct, or close
to correct, it will run good(assuming it is rebuilt properly). A 500 2
barrel actually flows 350CFM when it is flow rated as the same vacuum
drop as a 4 barrel is rated, so in essence you have half of a 700 4 barrel.

I kind of screwed up on the ported vacuum thing. I normally use manifold
vacuum and modify the distributor for more centrifugal advance. Either
way works.

Also, watch the plug coloring with the 500. they are jetted a little on
the rich side, so you may have to drop them a couple sizes.

Chris

 

matthew.nye@gmail.com wrote:
> The problem is fixed. I'm not 100% sure what it was, but I have a
> pretty good idea. The vacuum advance was plugged into manifold vacuum
> & had been ever since I can remember. The problem is that the vacuum
> advance was bad to begin with, so it was probably never noticed. I
> received my new carb today (a Holley 4412) & ensured it was plugged
> into ported vacuum this time around. I also timed it by ear + vacuum
> this time rather than the light. In the end, I came out with about 12
> degrees BTDC initial advance (with the vacuum advance disconnected,
> not that it matters now with ported vacuum) instead of the 5 degrees
> that my Haynes manual states. Dwell angle is about 40 rather than the
> recommended 31 now too. It will stall with anything lower than 35. I
> get about 20" vacuum at around 700rpm idle now & it performs better
> than I ever remember it when it was running correctly, probably due to
> the carb & maybe the headers? Anyway, I wonder what the possibility
> is that I have some aftermarket cam with a heavier lift/duration due
> to all of these non standard settings required to get it running good.
>
> Once again, I greatly appreciate everyone's help. I doubt I would
> have realized it wasn't getting enough advance without everyone's help
> & I learned a few things from everyone's experience. I even went out
> & bought some Champion truck plugs!
>
> Thanks again guys,
>
> -Matt
>

Sounds like you got it pretty much sorted out. I'll lay money that if
you put the 600 back on there now that the timing is correct, or close
to correct, it will run good(assuming it is rebuilt properly). A 500 2
barrel actually flows 350CFM when it is flow rated as the same vacuum
drop as a 4 barrel is rated, so in essence you have half of a 700 4 barrel.

I kind of screwed up on the ported vacuum thing. I normally use manifold
vacuum and modify the distributor for more centrifugal advance. Either
way works.

Also, watch the plug coloring with the 500. they are jetted a little on
the rich side, so you may have to drop them a couple sizes.

Chris

 

matthew.nye@gmail.com wrote:
> The problem is fixed. I'm not 100% sure what it was, but I have a
> pretty good idea. The vacuum advance was plugged into manifold vacuum
> & had been ever since I can remember. The problem is that the vacuum
> advance was bad to begin with, so it was probably never noticed. I
> received my new carb today (a Holley 4412) & ensured it was plugged
> into ported vacuum this time around. I also timed it by ear + vacuum
> this time rather than the light. In the end, I came out with about 12
> degrees BTDC initial advance (with the vacuum advance disconnected,
> not that it matters now with ported vacuum) instead of the 5 degrees
> that my Haynes manual states. Dwell angle is about 40 rather than the
> recommended 31 now too. It will stall with anything lower than 35. I
> get about 20" vacuum at around 700rpm idle now & it performs better
> than I ever remember it when it was running correctly, probably due to
> the carb & maybe the headers? Anyway, I wonder what the possibility
> is that I have some aftermarket cam with a heavier lift/duration due
> to all of these non standard settings required to get it running good.
>
> Once again, I greatly appreciate everyone's help. I doubt I would
> have realized it wasn't getting enough advance without everyone's help
> & I learned a few things from everyone's experience. I even went out
> & bought some Champion truck plugs!
>
> Thanks again guys,
>
> -Matt
>

Sounds like you got it pretty much sorted out. I'll lay money that if
you put the 600 back on there now that the timing is correct, or close
to correct, it will run good(assuming it is rebuilt properly). A 500 2
barrel actually flows 350CFM when it is flow rated as the same vacuum
drop as a 4 barrel is rated, so in essence you have half of a 700 4 barrel.

I kind of screwed up on the ported vacuum thing. I normally use manifold
vacuum and modify the distributor for more centrifugal advance. Either
way works.

Also, watch the plug coloring with the 500. they are jetted a little on
the rich side, so you may have to drop them a couple sizes.

Chris

 

actually the 600 carb is not too big, if it is jetted right, Stock from the
factory on my 69 pontiac firebird was a 850 cfm quadrajet, which ran great,
so don't let the idiots fool you. jetting is the key.
seems your getting close, I was about to recomend a new coil, but you said
its running good, and vacuum was the problem. Try throwin that 600 back on,
and I bet it will run great, play with the jetting if you need to and you
will be happier, I'd swear by it. I'm actually surprised Mike didn't tell
you to check the engine block ground wire. DOH! he must be getting old.
your on the right track. Bills advice was sound. It is very rare to skip a
tooth on the timing chain, it has to be real loose for that. But all the
back yard mechanics have HEARD about it, and they will jump right to it for a
what if? but I doubt anyone but bill on here has ever actually seen it. Keep
on going, just don't waste time on stupid witchcraft advice. Go back to the
basics, and keep going.

SnoMan wrote:
>> Carbs adjust that for idle speed once the mix
>>is set, TB's don't.
> Actually you kinda set idle speed and mixture togehter because when
>you change idle spped with a carb you change bleed air on plates and
>idle circuit some and you some alwaysm recheck settings of idle
>mixture after a idle speed change.
>-----------------
>TheSnoMan.com

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