Re: 91 Jeep Cherokee 4.0 engine transplant.
 

L.W.(Bill) ------ III wrote:
> You may bolt an older exhaust on to the 4.0 liter, but the 258 CID
> carburetor manifold will not match the ports:
> http://www.----------.com/temp/258vs4LPorts.jpg

Ok if I e-mail you a picture of my 88 YJ's black powdercoated 2bbl
aluminum intake bolted to a 0630 4.0 head and Stainless OEM style 4.0
header with a small sign that reads "Bill is wrong" will you post it and
admit the sign is correct?

--
Simon
"I may be wrong, but I'm not uncertain." -- Robert A. Heinlein

Re: 91 Jeep Cherokee 4.0 engine transplant.
 

Mike Romain wrote:
> So in other words, you can junk the fuel injection on a 4.0, drop in a
> cam and go with a carb and maybe a nice 4.2 performance intake to
> 'really' get some power out of it. :-)

I'll tell you if you really want some power out of a Jeep 6, do a 4.0
stroker, the 4.6 (or more) with a 4.2 crank and rods is a real eye
opener if you're used to the 4.2 or 4.0... It's not hard at all to put
down more RWHP than a stock Mustang 5.0 with a mildly messaged stroker.

The 4.0 w/ FI is definitely a better bet for power than ANY combintation
of upgrades with a 4.2, (short of forced induction). I know you're fond
of that old turd of an engine Mike but lets face it that thing was rated
at just over a hundred hp and torque in it's day... And that might have
been optimistic or even flywheel numbers... The 4.0 whips the pants off
it in just about every regard. I own and wheel all three engines and
I'll never build on a 4.2 again... waste of time.

--
Simon
"I may be wrong, but I'm not uncertain." -- Robert A. Heinlein

Re: 91 Jeep Cherokee 4.0 engine transplant.
 

Mike Romain wrote:
> So in other words, you can junk the fuel injection on a 4.0, drop in a
> cam and go with a carb and maybe a nice 4.2 performance intake to
> 'really' get some power out of it. :-)

I'll tell you if you really want some power out of a Jeep 6, do a 4.0
stroker, the 4.6 (or more) with a 4.2 crank and rods is a real eye
opener if you're used to the 4.2 or 4.0... It's not hard at all to put
down more RWHP than a stock Mustang 5.0 with a mildly messaged stroker.

The 4.0 w/ FI is definitely a better bet for power than ANY combintation
of upgrades with a 4.2, (short of forced induction). I know you're fond
of that old turd of an engine Mike but lets face it that thing was rated
at just over a hundred hp and torque in it's day... And that might have
been optimistic or even flywheel numbers... The 4.0 whips the pants off
it in just about every regard. I own and wheel all three engines and
I'll never build on a 4.2 again... waste of time.

--
Simon
"I may be wrong, but I'm not uncertain." -- Robert A. Heinlein

Re: 91 Jeep Cherokee 4.0 engine transplant.
 

Mike Romain wrote:
> So in other words, you can junk the fuel injection on a 4.0, drop in a
> cam and go with a carb and maybe a nice 4.2 performance intake to
> 'really' get some power out of it. :-)

I'll tell you if you really want some power out of a Jeep 6, do a 4.0
stroker, the 4.6 (or more) with a 4.2 crank and rods is a real eye
opener if you're used to the 4.2 or 4.0... It's not hard at all to put
down more RWHP than a stock Mustang 5.0 with a mildly messaged stroker.

The 4.0 w/ FI is definitely a better bet for power than ANY combintation
of upgrades with a 4.2, (short of forced induction). I know you're fond
of that old turd of an engine Mike but lets face it that thing was rated
at just over a hundred hp and torque in it's day... And that might have
been optimistic or even flywheel numbers... The 4.0 whips the pants off
it in just about every regard. I own and wheel all three engines and
I'll never build on a 4.2 again... waste of time.

--
Simon
"I may be wrong, but I'm not uncertain." -- Robert A. Heinlein

Re: 91 Jeep Cherokee 4.0 engine transplant.
 

Mail it to me and I'll post it.
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/

Simon Juncal wrote:
>
> Ok if I e-mail you a picture of my 88 YJ's black powdercoated 2bbl
> aluminum intake bolted to a 0630 4.0 head and Stainless OEM style 4.0
> header with a small sign that reads "Bill is wrong" will you post it and
> admit the sign is correct?
>
> --
> Simon

Re: 91 Jeep Cherokee 4.0 engine transplant.
 

Mail it to me and I'll post it.
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/

Simon Juncal wrote:
>
> Ok if I e-mail you a picture of my 88 YJ's black powdercoated 2bbl
> aluminum intake bolted to a 0630 4.0 head and Stainless OEM style 4.0
> header with a small sign that reads "Bill is wrong" will you post it and
> admit the sign is correct?
>
> --
> Simon

Re: 91 Jeep Cherokee 4.0 engine transplant.
 

Mail it to me and I'll post it.
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/

Simon Juncal wrote:
>
> Ok if I e-mail you a picture of my 88 YJ's black powdercoated 2bbl
> aluminum intake bolted to a 0630 4.0 head and Stainless OEM style 4.0
> header with a small sign that reads "Bill is wrong" will you post it and
> admit the sign is correct?
>
> --
> Simon

Re: 91 Jeep Cherokee 4.0 engine transplant.
 

I was correcting Simon assumption: You may bolt an older exhaust on
to the 4.0 liter "head", but the 258 CID carburetor manifold will not
match the ports: http://www.----------.com/temp/258vs4LPorts.jpg Mike,
you did notice the difference in your head and an fuel injection
head?????
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/

Mike Romain wrote:
>
> Sorry Bill, but you are mistaken. Folks swap the 4.0 head onto the 4.2
> engine all the time. 'I' don't like the idea of relying on epoxy to
> hold the coolant passages, but hey that's me.
>
> You only have to change the exhaust for the 4.0 header, the intake
> matches up just fine so the carb can go back on the 4.0 head.
>
> http://www.off-road.com/jeep/new/40conv.html
>
> So in other words, you can junk the fuel injection on a 4.0, drop in a
> cam and go with a carb and maybe a nice 4.2 performance intake to
> 'really' get some power out of it. :-)
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
> Canadian Off Road Trips Photos: Non members can still view!
> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
> (More Off Road album links at bottom of the view page)
>
> "L.W.(Bill) ------ III" wrote:
> >
> > You may bolt an older exhaust on to the 4.0 liter, but the 258 CID
> > carburetor manifold will not match the ports:
> > http://www.----------.com/temp/258vs4LPorts.jpg
> > God Bless America, Bill O|||||||O
> > mailto:--------------------
> >
> > Simon Juncal wrote:
> > >
> > > I'm not sure which manifold you're talking about... the exhuast manifold
> > > changed but the port pattern is the same so it's just a matter of
> > > swaping manifolds, or fab'ing or buying a new collector pipe, and
> > > modifiying brackets for clearance. The intake manifold also has the same
> > > port pattern and is 100% interchangable from Renix to non-HO mopar MPI,
> > > to HO, to even the newest intake (99 and up rounded runners). In fact
> > > you can even use an old 4.2L carbureted 2bbl intake manifold on a 7120
> > > or 0630 head. Those are both HO "high port" heads without the 0331
> > > head's penchant for cracking.
> > >
> > > Again this might require some minor drilling, grinding, maybe even some
> > > welding to get workable brackets and power steering but if you're doing
> > > an engine swap and the thought of drilling, grinding and welding scares
> > > you then you probably ought re-think doing it. :)
> > >
> > > --
> > > Simon
> > > "I may be wrong, but I'm not uncertain." -- Robert A. Heinlein

Re: 91 Jeep Cherokee 4.0 engine transplant.
 

I was correcting Simon assumption: You may bolt an older exhaust on
to the 4.0 liter "head", but the 258 CID carburetor manifold will not
match the ports: http://www.----------.com/temp/258vs4LPorts.jpg Mike,
you did notice the difference in your head and an fuel injection
head?????
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/

Mike Romain wrote:
>
> Sorry Bill, but you are mistaken. Folks swap the 4.0 head onto the 4.2
> engine all the time. 'I' don't like the idea of relying on epoxy to
> hold the coolant passages, but hey that's me.
>
> You only have to change the exhaust for the 4.0 header, the intake
> matches up just fine so the carb can go back on the 4.0 head.
>
> http://www.off-road.com/jeep/new/40conv.html
>
> So in other words, you can junk the fuel injection on a 4.0, drop in a
> cam and go with a carb and maybe a nice 4.2 performance intake to
> 'really' get some power out of it. :-)
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
> Canadian Off Road Trips Photos: Non members can still view!
> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
> (More Off Road album links at bottom of the view page)
>
> "L.W.(Bill) ------ III" wrote:
> >
> > You may bolt an older exhaust on to the 4.0 liter, but the 258 CID
> > carburetor manifold will not match the ports:
> > http://www.----------.com/temp/258vs4LPorts.jpg
> > God Bless America, Bill O|||||||O
> > mailto:--------------------
> >
> > Simon Juncal wrote:
> > >
> > > I'm not sure which manifold you're talking about... the exhuast manifold
> > > changed but the port pattern is the same so it's just a matter of
> > > swaping manifolds, or fab'ing or buying a new collector pipe, and
> > > modifiying brackets for clearance. The intake manifold also has the same
> > > port pattern and is 100% interchangable from Renix to non-HO mopar MPI,
> > > to HO, to even the newest intake (99 and up rounded runners). In fact
> > > you can even use an old 4.2L carbureted 2bbl intake manifold on a 7120
> > > or 0630 head. Those are both HO "high port" heads without the 0331
> > > head's penchant for cracking.
> > >
> > > Again this might require some minor drilling, grinding, maybe even some
> > > welding to get workable brackets and power steering but if you're doing
> > > an engine swap and the thought of drilling, grinding and welding scares
> > > you then you probably ought re-think doing it. :)
> > >
> > > --
> > > Simon
> > > "I may be wrong, but I'm not uncertain." -- Robert A. Heinlein

Re: 91 Jeep Cherokee 4.0 engine transplant.
 

I was correcting Simon assumption: You may bolt an older exhaust on
to the 4.0 liter "head", but the 258 CID carburetor manifold will not
match the ports: http://www.----------.com/temp/258vs4LPorts.jpg Mike,
you did notice the difference in your head and an fuel injection
head?????
God Bless America, Bill O|||||||O
mailto:-------------------- http://www.----------.com/

Mike Romain wrote:
>
> Sorry Bill, but you are mistaken. Folks swap the 4.0 head onto the 4.2
> engine all the time. 'I' don't like the idea of relying on epoxy to
> hold the coolant passages, but hey that's me.
>
> You only have to change the exhaust for the 4.0 header, the intake
> matches up just fine so the carb can go back on the 4.0 head.
>
> http://www.off-road.com/jeep/new/40conv.html
>
> So in other words, you can junk the fuel injection on a 4.0, drop in a
> cam and go with a carb and maybe a nice 4.2 performance intake to
> 'really' get some power out of it. :-)
>
> Mike
> 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> 88 Cherokee 235 BFG AT's
> Canadian Off Road Trips Photos: Non members can still view!
> Jan/06 http://www.imagestation.com/album/pi...?id=2115147590
> (More Off Road album links at bottom of the view page)
>
> "L.W.(Bill) ------ III" wrote:
> >
> > You may bolt an older exhaust on to the 4.0 liter, but the 258 CID
> > carburetor manifold will not match the ports:
> > http://www.----------.com/temp/258vs4LPorts.jpg
> > God Bless America, Bill O|||||||O
> > mailto:--------------------
> >
> > Simon Juncal wrote:
> > >
> > > I'm not sure which manifold you're talking about... the exhuast manifold
> > > changed but the port pattern is the same so it's just a matter of
> > > swaping manifolds, or fab'ing or buying a new collector pipe, and
> > > modifiying brackets for clearance. The intake manifold also has the same
> > > port pattern and is 100% interchangable from Renix to non-HO mopar MPI,
> > > to HO, to even the newest intake (99 and up rounded runners). In fact
> > > you can even use an old 4.2L carbureted 2bbl intake manifold on a 7120
> > > or 0630 head. Those are both HO "high port" heads without the 0331
> > > head's penchant for cracking.
> > >
> > > Again this might require some minor drilling, grinding, maybe even some
> > > welding to get workable brackets and power steering but if you're doing
> > > an engine swap and the thought of drilling, grinding and welding scares
> > > you then you probably ought re-think doing it. :)
> > >
> > > --
> > > Simon
> > > "I may be wrong, but I'm not uncertain." -- Robert A. Heinlein