Turbo?
Senior Member
Joined: Nov 2011
Posts: 795
Likes: 0
From: Snowville, PA
Year: 1998
Model: Cherokee
Engine: 4.0 I6 torque monster w/ a supercharger
Sorry, but I felt the need to chime in...
The build thread in question is in my sig.
I'm using a custom Split Second piggyback controller. It controls the timing, it has a 'additional injector controller' to control a 7th injector (50lb) which is mounted to the inlet elbow of the supercharger and sends fuel through the S/C.
It's usually around 6psi boost on a normal (hot) day. When the temp dips to 45 and below, I'm hitting 7psi.
It made 220rwhp and 270rwtq on a Mustang (conservative) dyno on a 90+ degree day 90+% humidity. And the 270rwtq was at 3000rpm well AFTER the torque peak. Gotta love trying to dyno a vehicle with an automatic transmission...
IIRC it dyno'd 150rwhp & 170rwtq w/ cat-back exhaust, a 62mm throttle body, and a Volant CAI.
I averaged 17mpg over the 114 mile trip back from Rausch Creek cruising at 70mph. And that was with me FLOGGING on it like crazy.
Other people were having trouble with the timing control. Not us.
IIRC that was an old Rimmer kit that used that used a second inline fuel pump and a rising rate FMU to raise the fuel rail pressure under boost. Looks like they didn't do anything to the timing...
http://www.4wheeloffroad.com/techart...ercharger_kit/
IMHO supercharging (and even turbocharging) is simpler than an engine swap because there is usually more involved to a engine swap than meets the eye and passing emissions is usually a pain... But I have no experience in engine swaps.. Lol 
I do know about supercharging a 1998 Jeep Cherokee with the 4.0 since I have actually done it though.
Got a build thread for that turbo? What exactly did you do for fuel and timing? Any specs on boost and power gains? Milage?
I've read a sprintex supercharger install, seemed far from bolt on. I remember a lot of fuss over the timing, maybe I'm wrong. Pretty sure it was on naxja.
I've read a sprintex supercharger install, seemed far from bolt on. I remember a lot of fuss over the timing, maybe I'm wrong. Pretty sure it was on naxja.
I'm using a custom Split Second piggyback controller. It controls the timing, it has a 'additional injector controller' to control a 7th injector (50lb) which is mounted to the inlet elbow of the supercharger and sends fuel through the S/C.
It's usually around 6psi boost on a normal (hot) day. When the temp dips to 45 and below, I'm hitting 7psi.
It made 220rwhp and 270rwtq on a Mustang (conservative) dyno on a 90+ degree day 90+% humidity. And the 270rwtq was at 3000rpm well AFTER the torque peak. Gotta love trying to dyno a vehicle with an automatic transmission...
IIRC it dyno'd 150rwhp & 170rwtq w/ cat-back exhaust, a 62mm throttle body, and a Volant CAI.I averaged 17mpg over the 114 mile trip back from Rausch Creek cruising at 70mph. And that was with me FLOGGING on it like crazy.
Other people were having trouble with the timing control. Not us.
http://www.4wheeloffroad.com/techart...ercharger_kit/
GI'm not saying anyone's wrong, its just always intrigued me. Yet every time I read about forced induction it seems too expensive and complicated for the gains. Especially compared to engine swaps.
Smog, emission, etc. That changes the way to look at it. I just don't have those restrictions here.
Smog, emission, etc. That changes the way to look at it. I just don't have those restrictions here.
I do know about supercharging a 1998 Jeep Cherokee with the 4.0 since I have actually done it though.
Newbie
Joined: Nov 2012
Posts: 25
Likes: 0
Model: Cherokee
when your rock crawling with a turbo, there will be so much boost lag, it wouldnt be useful...supercharger would be though
Newbie
Joined: Nov 2012
Posts: 25
Likes: 0
Model: Cherokee
look, your 17, almost 18,, your gonna build what you want...
in my opinion, if you want to boost a vehicle, get a sports car, and then you can enjoy it....the time, effort, etc to properly set up and get a turbo running good, isnt worth it in a vehicle that was never meant to go over 80mph....im not saying jeeps are slow, but they werent designed for high hp/high speed use...
plus, when you go faster, you need to stop faster, so brakes would need upgraded, so would brake lines, suspension to account for the extra hp on launching, etc....
in my opinion, if you want to boost a vehicle, get a sports car, and then you can enjoy it....the time, effort, etc to properly set up and get a turbo running good, isnt worth it in a vehicle that was never meant to go over 80mph....im not saying jeeps are slow, but they werent designed for high hp/high speed use...
plus, when you go faster, you need to stop faster, so brakes would need upgraded, so would brake lines, suspension to account for the extra hp on launching, etc....
Newbie
Joined: Nov 2012
Posts: 25
Likes: 0
Model: Cherokee
Sorry, but I felt the need to chime in...
The build thread in question is in my sig.
I'm using a custom Split Second piggyback controller. It controls the timing, it has a 'additional injector controller' to control a 7th injector (50lb) which is mounted to the inlet elbow of the supercharger and sends fuel through the S/C.
It's usually around 6psi boost on a normal (hot) day. When the temp dips to 45 and below, I'm hitting 7psi.
It made 220rwhp and 270rwtq on a Mustang (conservative) dyno on a 90+ degree day 90+% humidity. And the 270rwtq was at 3000rpm well AFTER the torque peak. Gotta love trying to dyno a vehicle with an automatic transmission... IIRC it dyno'd 150rwhp & 170rwtq w/ cat-back exhaust, a 62mm throttle body, and a Volant CAI.
I averaged 17mpg over the 114 mile trip back from Rausch Creek cruising at 70mph. And that was with me FLOGGING on it like crazy.
Other people were having trouble with the timing control. Not us.
IIRC that was an old Rimmer kit that used that used a second inline fuel pump and a rising rate FMU to raise the fuel rail pressure under boost. Looks like they didn't do anything to the timing...
http://www.4wheeloffroad.com/techart...ercharger_kit/
IMHO supercharging (and even turbocharging) is simpler than an engine swap because there is usually more involved to a engine swap than meets the eye and passing emissions is usually a pain... But I have no experience in engine swaps.. Lol
I do know about supercharging a 1998 Jeep Cherokee with the 4.0 since I have actually done it though.
The build thread in question is in my sig.
I'm using a custom Split Second piggyback controller. It controls the timing, it has a 'additional injector controller' to control a 7th injector (50lb) which is mounted to the inlet elbow of the supercharger and sends fuel through the S/C.
It's usually around 6psi boost on a normal (hot) day. When the temp dips to 45 and below, I'm hitting 7psi.
It made 220rwhp and 270rwtq on a Mustang (conservative) dyno on a 90+ degree day 90+% humidity. And the 270rwtq was at 3000rpm well AFTER the torque peak. Gotta love trying to dyno a vehicle with an automatic transmission...
IIRC it dyno'd 150rwhp & 170rwtq w/ cat-back exhaust, a 62mm throttle body, and a Volant CAI.I averaged 17mpg over the 114 mile trip back from Rausch Creek cruising at 70mph. And that was with me FLOGGING on it like crazy.
Other people were having trouble with the timing control. Not us.
IIRC that was an old Rimmer kit that used that used a second inline fuel pump and a rising rate FMU to raise the fuel rail pressure under boost. Looks like they didn't do anything to the timing...
http://www.4wheeloffroad.com/techart...ercharger_kit/
IMHO supercharging (and even turbocharging) is simpler than an engine swap because there is usually more involved to a engine swap than meets the eye and passing emissions is usually a pain... But I have no experience in engine swaps.. Lol
I do know about supercharging a 1998 Jeep Cherokee with the 4.0 since I have actually done it though.
i agree 100% the time/cost factor outweighs the gains on boosting a jeep with a turbo...supercharger is best for instant power...but didnt jeep make the liberty with a turbo diesel for like 2 years? that would be a sweet swap
CF Veteran
Joined: Apr 2011
Posts: 4,825
Likes: 2
From: Indianapolis
Year: '99 and '91
Model: Cherokee
Originally Posted by bpas328xi
Sorry, but I felt the need to chime in...
The build thread in question is in my sig.
I'm using a custom Split Second piggyback controller. It controls the timing, it has a 'additional injector controller' to control a 7th injector (50lb) which is mounted to the inlet elbow of the supercharger and sends fuel through the S/C.
It's usually around 6psi boost on a normal (hot) day. When the temp dips to 45 and below, I'm hitting 7psi.
It made 220rwhp and 270rwtq on a Mustang (conservative) dyno on a 90+ degree day 90+% humidity. And the 270rwtq was at 3000rpm well AFTER the torque peak. Gotta love trying to dyno a vehicle with an automatic transmission... IIRC it dyno'd 150rwhp & 170rwtq w/ cat-back exhaust, a 62mm throttle body, and a Volant CAI.
I averaged 17mpg over the 114 mile trip back from Rausch Creek cruising at 70mph. And that was with me FLOGGING on it like crazy.
Other people were having trouble with the timing control. Not us.
IIRC that was an old Rimmer kit that used that used a second inline fuel pump and a rising rate FMU to raise the fuel rail pressure under boost. Looks like they didn't do anything to the timing...
http://www.4wheeloffroad.com/techart...ercharger_kit/
IMHO supercharging (and even turbocharging) is simpler than an engine swap because there is usually more involved to a engine swap than meets the eye and passing emissions is usually a pain... But I have no experience in engine swaps.. Lol
I do know about supercharging a 1998 Jeep Cherokee with the 4.0 since I have actually done it though.
The build thread in question is in my sig.
I'm using a custom Split Second piggyback controller. It controls the timing, it has a 'additional injector controller' to control a 7th injector (50lb) which is mounted to the inlet elbow of the supercharger and sends fuel through the S/C.
It's usually around 6psi boost on a normal (hot) day. When the temp dips to 45 and below, I'm hitting 7psi.
It made 220rwhp and 270rwtq on a Mustang (conservative) dyno on a 90+ degree day 90+% humidity. And the 270rwtq was at 3000rpm well AFTER the torque peak. Gotta love trying to dyno a vehicle with an automatic transmission...
IIRC it dyno'd 150rwhp & 170rwtq w/ cat-back exhaust, a 62mm throttle body, and a Volant CAI.I averaged 17mpg over the 114 mile trip back from Rausch Creek cruising at 70mph. And that was with me FLOGGING on it like crazy.
Other people were having trouble with the timing control. Not us.
IIRC that was an old Rimmer kit that used that used a second inline fuel pump and a rising rate FMU to raise the fuel rail pressure under boost. Looks like they didn't do anything to the timing...
http://www.4wheeloffroad.com/techart...ercharger_kit/
IMHO supercharging (and even turbocharging) is simpler than an engine swap because there is usually more involved to a engine swap than meets the eye and passing emissions is usually a pain... But I have no experience in engine swaps.. Lol
I do know about supercharging a 1998 Jeep Cherokee with the 4.0 since I have actually done it though.
Anyways, thanks for clearing some things up. I think maybe you just have a bit more of the build data running around up in the brain than your old man.
No doubt that supercharged rig would be fun as hell to drive. I still don't think its cost effective BUT I believe in your build you've recognized that its not. Its still cool as hell though.
CF Veteran
Joined: Apr 2011
Posts: 4,825
Likes: 2
From: Indianapolis
Year: '99 and '91
Model: Cherokee
Originally Posted by CobraMarty
What's cost effective? Modding a Jeep? Any mod? Nope.
Who are you calling 'old man'?
Who are you calling 'old man'?
Only reason I even say cost effective is because the OP was asking about turbos pertaining to mileage. Not many things are cost effective when modding a jeep. Definitely not a SC or Turbo OR an engine swap.
GPM not MPG
Senior Member
Joined: Nov 2011
Posts: 795
Likes: 0
From: Snowville, PA
Year: 1998
Model: Cherokee
Engine: 4.0 I6 torque monster w/ a supercharger
Originally Posted by DieselD
Well I said "your old man" not "you're an old man"
Only reason I even say cost effective is because the OP was asking about turbos pertaining to mileage. Not many things are cost effective when modding a jeep. Definitely not a SC or Turbo OR an engine swap.
GPM not MPG
I've been bitten by the Jeep bug...
Btw; there's a TON of pics on my build, so you might want to use a computer and google chrome instead of a tablet...
Newbie
Joined: Nov 2012
Posts: 2
Likes: 0
From: King
Year: 1991
Model: Comanche
Engine: 4.0
i've heard
you can use a supercharger off a Ford T-bird 3.8 SC " Eaton SuperCharger M90" or FACTORY NISSAN XTERRA/FRONTIER SUPERCHARGER.. But Im not 100% on that
CF Veteran
Joined: Dec 2011
Posts: 1,777
Likes: 22
From: PA KOTUFU!
Year: 1998
Engine: 4.0L 162,000
you can use a supercharger off a Ford T-bird 3.8 SC " Eaton SuperCharger M90"
Easier said than done.
CF Veteran
Joined: Sep 2009
Posts: 6,322
Likes: 6
From: Summerville, Ga
Year: 1995
Model: Cherokee
Engine: 2.5 4 cyl.
you can use a supercharger off a Ford T-bird 3.8 SC " Eaton SuperCharger M90" or FACTORY NISSAN XTERRA/FRONTIER SUPERCHARGER.. But Im not 100% on that
x2!!!! im doing just what this guy did, i've even got the giant hole in my hood cut and everything..
http://www.rs25.com/forums/f7/t10681...otsa-pics.html
Newbie
Joined: Nov 2012
Posts: 9
Likes: 0
Model: Cherokee
Turbo Jeep
Complete Custom turbo kit for cherokee/ grand cherokee
400 hp safely
Garrett GT35 Turbo
Large Supra Intercooler
Custom Up and Down Pipe
Custom Charge Piping
RFL Blow Off Valve and Waste Gate set to 9 psi (adjustable springs included)
Full Tuning Computer and Software for easy and full modifiable tuning
(Already tuned for 375 hp on a stock I6 4.0)
Bosch 42lb High Performance Fuel Injectors
Walbro 255 lph inline fuel pump
Good up to 600 hp
Wide Band Sensor and Gauge
Boost Gauge (Red backlight sick)
Oil Fittings and Piping for Turbo
Full Vaccum Lines
We spent over $5,500 on parts alone labor not included
One of a kind turbo kit, on my 1997 Grand Cherokee, it smoked a fully bolt on LS1 Trans Am
I may be parting with it soon
Let me know what you think!
400 hp safely
Garrett GT35 Turbo
Large Supra Intercooler
Custom Up and Down Pipe
Custom Charge Piping
RFL Blow Off Valve and Waste Gate set to 9 psi (adjustable springs included)
Full Tuning Computer and Software for easy and full modifiable tuning
(Already tuned for 375 hp on a stock I6 4.0)
Bosch 42lb High Performance Fuel Injectors
Walbro 255 lph inline fuel pump
Good up to 600 hp
Wide Band Sensor and Gauge
Boost Gauge (Red backlight sick)
Oil Fittings and Piping for Turbo
Full Vaccum Lines
We spent over $5,500 on parts alone labor not included
One of a kind turbo kit, on my 1997 Grand Cherokee, it smoked a fully bolt on LS1 Trans Am
I may be parting with it soon
Let me know what you think!
