Turbo charged 4.0 xj

[jforse]

i fyou re-read what i said about the manifold lenght, i said the turbo is have to work harder that it should to make that 6 psi. therefore increasing lag and heat. and i know how a watergate works, again, i was being sarcastic..

as far as the turbo being too big, its actually too small. but they probably do that because its so far from the head.

What turbo are they using? I can't tell from any of the pictures.

 

[WheelinJR]

If I remember correctly its a Garrett T3 with either a .48 or .63 exhaust housing AR, a .60 AR Super Series compressor housing (has slightly larger inlet over the standard .60AR T3 compressor) with a 60 trim compressor wheel. Don't remember the stage of exhaust wheel, but I want to say Stage 3 ???

 

[jforse]

If I remember correctly its a Garrett T3 with either a .48 or .63 exhaust housing AR, a .60 AR Super Series compressor housing (has slightly larger inlet over the standard .60AR T3 compressor) with a 60 trim compressor wheel. Don't remember the stage of exhaust wheel, but I want to say Stage 3 ???

God I hope there not using a .48 t3 housing on a 4.0litre. That would be a big choke point! I used a .63 a/r T3 60 Trim on my 2.0litre AWD DSM. 568whp @ 29psi.

I have seriously thought about turboing my XJ. I have a spare T4 GT35R sitting on the work bench.:yap:

 

[XJFitchKid]

:looney:

God I hope there not using a .48 t3 housing on a 4.0litre. That would be a big choke point! I used a .63 a/r T3 60 Trim on my 2.0litre AWD DSM. 568whp @ 29psi.

I have seriously thought about turboing my XJ. I have a spare T4 GT35R sitting on the work bench.:yap:

You wont.....hehehe

 

[jforse]

Probably not. Thats why I sold my DSMs. Get something that I didn't have to tune all the time.

 

[tealcherokee]

God I hope there not using a .48 t3 housing on a 4.0litre. That would be a big choke point! I used a .63 a/r T3 60 Trim on my 2.0litre AWD DSM. 568whp @ 29psi.

I have seriously thought about turboing my XJ. I have a spare T4 GT35R sitting on the work bench.:yap:

and your 2.0 redlined at what? and the 4.0 redlines at???

im using a turbo of a 5.9L diesel and its borderline small for my 4.6 stroker

 

[Flash]

and your 2.0 redlined at what? and the 4.0 redlines at???

im using a turbo of a 5.9L diesel and its borderline small for my 4.6 stroker

Need more info........what year? auto or standard?

Flash

 

[BBeach]

and your 2.0 redlined at what? and the 4.0 redlines at???

im using a turbo of a 5.9L diesel and its borderline small for my 4.6 stroker

It said on one site 7000rpm but peak power at 6000rpm. 4.0 is 5300rpm or so.

 

[BBeach]

FIXED

Probably not. Thats why I sold my DSMs. Get something that I didn't have to REPAIR all the time.

A couple of my friends have these things, one minute they are running's the next they are repairing some blown something or other.

 

[WheelinJR]

and your 2.0 redlined at what? and the 4.0 redlines at???

im using a turbo of a 5.9L diesel and its borderline small for my 4.6 stroker

hrmmms, borg warner gm8?

 

[tealcherokee]

It said on one site 7000rpm but peak power at 6000rpm. 4.0 is 5300rpm or so.

exactally...
a 2.0, should flow about 2000cc/rev 1000rpm = 100000cc/min = 35cfm
a 4.0, should flow about 4000cc/rev 1000rpm = 200000cc/min = 70cfm

now peak power
a 2.0, should flow about 2000cc/rev 6000rpm = 600000cc/min = 212cfm
a 4.0, should flow about 4000cc/rev 3000rpm = 600000cc/min = 212cfm

so you see at peak power for the motors, flow is the same.....

granted the 4.0 will flow more at redline, but, you dont need to shift the 4.0 at redline. clifford is making some pretty mean power out of a stroker, and theyre shifting around 4200-4400 rpm

 

[BBeach]

The 4.0's peak power is not 3000rpm....Ive seen 4600rpm at most sites. Thats over 50% off.

 

[tealcherokee]

torque.... sorry, horsepower is the most useless number made to man

 

[BBeach]

torque.... sorry, horsepower is the most useless number made to man

Alrite then its 4800rpm for the DSM with 214 lb.ft.Horsepower (hp @ rpm):210 @ 6000Torque (lb.-ft. @ rpm):214 @ 4800

 

[WheelinJR]

torque.... sorry, horsepower is the most useless number made to man

oh cmon now thats not true. Horsepower isn't totally useless. It works great for companies selling parts that promise "horsepower gains". :gee:

 

[jforse]

and your 2.0 redlined at what? and the 4.0 redlines at???

im using a turbo of a 5.9L diesel and its borderline small for my 4.6 stroker

Stock the 4g63 redlines at 7500 rpm
Mine was user adjustable. Redline was 9000rpm, but the trans would not shift past 8700. At the track usally 8500 was my shift point. A GT35R would be fine on a 4.0litre. Work the engine a little, use a AEM or MoTec standalone, and run 15-16 psi on pump gas.

 

[jforse]

FIXED
A couple of my friends have these things, one minute they are running's the next they are repairing some blown something or other.

Yep thats true. Before I sold mine it was not a fun daily driver. My street tune and track tune were the same. I used E85 because it is cheap and is high octane. This alowed me to run the 29psi all the time. Engine was very stout, but I had trouble keeping axles, and transmissions in it. I guess that is what happens when you push 560+whp, 8000rpm launches, a welded center diff, and 9" wide slicks, through something that was designed for 200!

 

[BlackJax]

You would use a FPR(fuel pressure regulator) with a pressure gauge. Set the base fuel pressure at idle. As the boost goes up each 1psi the FPR will increase Fuel Pressure 1psi

Are you recommending an FMU over bigger injectors?

 

[95RedCherokee]

typically you use an FMU with stock injectors. I wouldn't use one for high boost. I would use Megasquirt if I were tuning the jeep.

 

[NXJ]

How about two Garret TB0312's sharing one intercooler, any thoughts on a such setup? What exactly would I need to make this happen?