turbo charging a jeep.
Senior Member
Joined: Dec 2009
Posts: 542
Likes: 1
From: Gilbert, AZ
Year: 2000
Model: Cherokee
Engine: 4.0L
Wait, thought we were aiming for low boost?
Megasquirt is needed, but a simpler tuning setup using a FMU and factory MAP sensor setup is a bad choice?
Sounds like a contradiction.
For a low boost setup that you want to spool at super low RPM and not choke out in higher RPM, everything I suggested will be phenominal.
But you've done all this, so.....oh...wait...you haven't. Your still talking out of your tail pipe.

Megasquirt is needed, but a simpler tuning setup using a FMU and factory MAP sensor setup is a bad choice?
Sounds like a contradiction.
For a low boost setup that you want to spool at super low RPM and not choke out in higher RPM, everything I suggested will be phenominal.
But you've done all this, so.....oh...wait...you haven't. Your still talking out of your tail pipe.

i allready mentioned a big 16G, or a T3/T4.
nobody ever said a megasquirt is needed. i have been pushing a piggy back. i did mention megasquirt as an option but it will require more wiring.
you keep bringing up megasquirt in every post.
please read and understand before posting. actually, look at my post where i broke down parts and over estimated prices.
Seasoned Member
Joined: Jun 2009
Posts: 298
Likes: 2
From: Lancaster PA
Year: 1988
Model: Cherokee
Engine: 4.0
FMU's are still offered as a type of "weekend install" package so people can install it and drive away the same weekend.
FMU's can work, but they have been known to back pressure fuel pumps, run super rich between transitions, and run rich in open loop.
you cant really get a good consistent tune with an FMU. but they can be used to get you by for a while.
for the money, why not just buy a FPR since this isnt a mfg turbo kit?
FMU's can work, but they have been known to back pressure fuel pumps, run super rich between transitions, and run rich in open loop.
you cant really get a good consistent tune with an FMU. but they can be used to get you by for a while.
for the money, why not just buy a FPR since this isnt a mfg turbo kit?
Seasoned Member
Joined: Jun 2009
Posts: 298
Likes: 2
From: Lancaster PA
Year: 1988
Model: Cherokee
Engine: 4.0
thats what I thought at first too but I like to give everyone the benifit of the doubt without actually knowing the person
lol so whats wrong with rustangs Ive built and owned and raced many a mustang over the years and currently have an 84 hatch that we race.
lol so whats wrong with rustangs Ive built and owned and raced many a mustang over the years and currently have an 84 hatch that we race.
Senior Member
Joined: Dec 2009
Posts: 542
Likes: 1
From: Gilbert, AZ
Year: 2000
Model: Cherokee
Engine: 4.0L
yeah yeah, ive heard your "there is no room", and the "but the cooling system is horrible", and your " the exhaust manifold is to hard to work on"
once again....just because few people have done it, does not mean it is hard at all. putting turbo's on factory non turbo cars, and fitting all the crap required in super tight/small engine bays is all nothing new.
the OP stated he has the CT-26 turbo, so that is what he will probably want to work with, instead of buying a hybrid BB turbo like you suggest, or the big 16G like i suggest.
I like a few models. But thats for a different thread.
Even a stroker would be a better idea for the OP than a turbo setup. Same power gain as a "low boost" setup, way less cost.
Even a stroker would be a better idea for the OP than a turbo setup. Same power gain as a "low boost" setup, way less cost.
Senior Member
Joined: Dec 2009
Posts: 542
Likes: 1
From: Gilbert, AZ
Year: 2000
Model: Cherokee
Engine: 4.0L
a Big 16G can handle 20psi, a 4.0L will not outflow the turbo at low boost.
why do you seem to think putting a turbo is SO much more difficult, and complicated than putting a turbo on any other factory non-turbo vehicle?
yeah yeah, ive heard your "there is no room", and the "but the cooling system is horrible", and your " the exhaust manifold is to hard to work on"
once again....just because few people have done it, does not mean it is hard at all. putting turbo's on factory non turbo cars, and fitting all the crap required in super tight/small engine bays is all nothing new.
the OP stated he has the CT-26 turbo, so that is what he will probably want to work with, instead of buying a hybrid BB turbo like you suggest, or the big 16G like i suggest.
yeah yeah, ive heard your "there is no room", and the "but the cooling system is horrible", and your " the exhaust manifold is to hard to work on"
once again....just because few people have done it, does not mean it is hard at all. putting turbo's on factory non turbo cars, and fitting all the crap required in super tight/small engine bays is all nothing new.
the OP stated he has the CT-26 turbo, so that is what he will probably want to work with, instead of buying a hybrid BB turbo like you suggest, or the big 16G like i suggest.
And I've been down the "I'm gonna turbo my XJ" road.
Personally.
ME. I HAVE DONE THIS CRAP.
Not, "I've turbo'd other cars that have turbos already on them so I'm mocking up a similar setup to the factory."
I've been down the "I'm going to turbo my 1987 XJ that is in my driveway because it will be a blast."
Then I found out its not easy. And it won't be cheap.
And then I realized all that money I'd **** away would be MUCH better spend elsewhere.
that hotside is too small, it'll bottle neck and boost creep like crazy.
doesn't matter what boost range it makes.
if it doesn't flow enough exhaust out the internal wastegate, you'll outflow and boost creep.
You'll be forced to run a high boost setup, or you won't flow enough exhaust and you'll HURT power.
Thats why all the DSM guys need to either upgrade the wasegate to a larger wastegate, or plan to tune for 20 psi.
And thats on a 2.0 4 cylinder. You are suggesting sticking one on a 4.0 6 cyl?
Wow.
Senior Member
Joined: Dec 2009
Posts: 542
Likes: 1
From: Gilbert, AZ
Year: 2000
Model: Cherokee
Engine: 4.0L
Senior Member
Joined: Dec 2009
Posts: 542
Likes: 1
From: Gilbert, AZ
Year: 2000
Model: Cherokee
Engine: 4.0L
You'll outflow that 16g no problem.
And I've been down the "I'm gonna turbo my XJ" road.
Personally.
ME. I HAVE DONE THIS CRAP.
Not, "I've turbo'd other cars that have turbos already on them so I'm mocking up a similar setup to the factory."
I've been down the "I'm going to turbo my 1987 XJ that is in my driveway because it will be a blast."
Then I found out its not easy. And it won't be cheap.
And then I realized all that money I'd **** away would be MUCH better spend elsewhere.
And I've been down the "I'm gonna turbo my XJ" road.
Personally.
ME. I HAVE DONE THIS CRAP.
Not, "I've turbo'd other cars that have turbos already on them so I'm mocking up a similar setup to the factory."
I've been down the "I'm going to turbo my 1987 XJ that is in my driveway because it will be a blast."
Then I found out its not easy. And it won't be cheap.
And then I realized all that money I'd **** away would be MUCH better spend elsewhere.
i suggested a BIG 16G, or a T3/T4, but he allready has a CT-26.
Last edited by Grip; Nov 16, 2011 at 08:45 PM.





