|07-14-2012 03:10 PM|
|tjblackhills||I got my 99 tj very poor power lots of down shifting, so I WENT WITH A hesco high flow throttle body, k&n perfommance air intake and edge chip and it made alot of differance, hills I shifted down on before now go over in fifth. Great throttle responce was way better. Running 31s with stock gearing, running bigger tires takes lots of power. It's not a 327 but alot better then it was.|
|07-12-2012 10:10 PM|
|Gunner||Pics or vids POR FAVOR|
|07-12-2012 09:39 PM|
We are running the Ford Dyno event at AirVenture 2012 so I can't do it this weekend. We just repainted it and are gonna polish on Saturday.
I plan on running a Borg Warner EFR 6258 (Newest turbo tech, internal waste-gate and integrated bypass valve) on stock internals for now. Paired with 505 Roller Rockers and universal turbo kit, JBA header and custom turbo-back, of course.
I found someone that will do the flash tunes, and I can load them and datalog with the DiaboSport InTune.
|07-12-2012 05:52 PM|
|Gunner||Hey I just looked You got an AWD Mustang. Wonder what a Jeep loses in 4 wheel hi compared to 2 wheel high?|
|07-12-2012 05:48 PM|
Mustang Dynos ROCK
Here is a torquer from 505.
JP magazine DEC 2009
|07-12-2012 05:38 PM|
|07-12-2012 04:07 PM|
|Gunner||One thing I would love to see is a dyno done on 505's roller rockers. The extra lift and 2 degrees of duration just might show some low and mid range boost. But even that would be minimal. Chad Golens stroker motors will work in our power ranges. It just costs bucks to improve on perfection. What else crawls with a 4.0. We are optimized to go slow and they do that great. It's like trying to get a Budwiser Clysdale and run it in the Kentucky Derby.|
|07-12-2012 01:18 AM|
|Derp||Step one. Get rid of 3.07's (I need to.)|
|07-11-2012 10:32 PM|
|The Green Machine|
|07-09-2012 05:20 PM|
|07-09-2012 04:27 PM|
|07-09-2012 04:01 PM|
I shift between 2 an 4k depending on how fast (ha ha) I am trying to get up to speed.
|07-09-2012 03:34 PM|
|Jeeperjoe||My jeep rarely ever sees 3000 rpm. Only when getting on the highway or passing people. I have a 5 speed. When I'm maintaining speed around town I stay at about 1500 rpm. On the highway I'm at 2000 rpm at 70 mph. Is keeping low rpms bad?|
|07-08-2012 08:58 PM|
|Olephriam1||I guess it depends on what kind of power increase you are looking for. I have 4.10 gears in my jeep and it is great off road. It is a little weak going up the 10,000 ft mountain passes we have her in Colorado. I would like a little more midrage power for cruising up the pass and being able to pass without blocking traffic behind me. I would like a bit more power in the 2000 to 3500 rpm range. I agree most of the aftermarket products depend on higher rpm's to be effective.|
|07-07-2012 08:18 PM|
|Gunner||Was a performance engine builder for many years. Rule of thumb is the engine with the smallest port and the most flow wins the low rpm torque race. Most of the aftermarket parts I have seen for jeeps do nearly nothing in in the idle to 3000 rpm range. I agree that gears to keep you in your power band are best and when the time comes put the Golen Stroker in it. You'll be happiest that way. I don't think any of the items mentioned do anything for you on a crawl.|
|07-07-2012 07:54 PM|
|07-07-2012 07:43 PM|
|07-07-2012 07:33 PM|
|07-07-2012 07:23 PM|
I have some but not all of the things mentioned, and have ran them for more than a couple years....and a lot of people were telling me IDK how to drive my Jeep because IMO it has enough power in traffic to drive around town running lower RPMs...bottom line I was told I was "lugging the motor" but no one ever rode with me or heard it.
How many people are driving around town above 2000K RPM---stick or auto?
|07-07-2012 07:11 PM|
|07-07-2012 07:03 PM|
|The Green Machine||I bought all of the stuff, and they do work. It would cost $4,000 to swap in a more powerful motor into my Jeep. I paid $600.00 for mods. They did not turn my Jeep into a "powerhouse", but the power gains are noticeable.|
|07-05-2012 09:19 PM|
ratio = bore/stroke
the 4.0L is an oversquare engine, meaning it's bore is greater than its stroke length, so the ratio is greater than one. If the ratio is very close to 1, then the motor is said to be square. If the ratio is less than 1, the motor is undersquare.
to make an engine a stroker means increasing the stroke length, making the engine undersquare, or closer to it than the stock oversquare configuration.
more info: http://en.wikipedia.org/wiki/Stroke_ratio
In the 4.0L, this is accomplished by installing a crankshaft from a 4.2L carb'd YJ/CJ, which has a longer stroke length than the 4.0L crank. You can do other stuff too, like boring the cylinder walls out, and the 4.0L has plenty of meat for such operation. There is a whole lot more too it, like long rod vs short rod, what pistons to use, deck height, camshaft and head choice, etc, etc...
|07-05-2012 08:49 PM|
|07-05-2012 08:46 PM|
|RioWrangler||This maybe a stupid question but what is meant by stroke the engine?|
|07-04-2012 01:42 PM|
I think the first thing the 4.0 would benefit from is getting the cats out, a tune, and then the valve-train, head and cam.
Next up would be to super/turbocharge it or run nitrous.
|07-04-2012 10:38 AM|
|07-04-2012 10:31 AM|
|07-04-2012 10:15 AM|
|baerbonesjones||making it a combustion engine inhale and exhale easyer, yields power gains, thats 100% proven fact.|
|07-04-2012 09:58 AM|
|07-04-2012 08:40 AM|
I am new here also. A few years back I got sucked in to the aftermarket "performance" parts for the 4.0 scam. Air intake,chip,throttle body,high flow exhaust, and injectors. I got minimual gains, and spent a lot. I dont regret the stainless exhaust as I needed to replace my old one at the time, and Michigan road salt plays hell on steel components.
A stroker is on my "want" list. But with only 145,000 miles and no problems with my motor I cant justify it.
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