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  Topic Review (Newest First)
12-01-2019 08:30 AM
Waternut
Quote:
Originally Posted by WestfieldMX5 View Post
Since when does 370 wheel hp equal 528 engine hp? No way 158hp gets lost in the driveline. Realistically 60hp, so 430 engine hp. Still a good number, must be a blast to drive that thing, not arguing with that .
Big engine, big luggy tires, big transmission, big transfer case... You're comparing it to a 2wd drag and race cars which typically have a 15-20% loss. An AWD car can lose closer to 25% on average. However, dyno's can measure the driveline loss and then estimate the crank horsepower. Go watch some of Busted Knuckles youtube channel. Big rock bouncers can lose as much as 60% from engine to tires. There is a lot more that plays into the losses than you think.

As for the original poster... you gave us no real information to help you and then once you fixed it, you gave us no real information on the problem or the fix. Glad you got it figure out but that's pretty lame of you...
11-30-2019 04:17 PM
WestfieldMX5 Since when does 370 wheel hp equal 528 engine hp? No way 158hp gets lost in the driveline. Realistically 60hp, so 430 engine hp. Still a good number, must be a blast to drive that thing, not arguing with that .
11-30-2019 06:30 AM
fishadventure
Quote:
Originally Posted by JeeperDon View Post
I have no idea why someone would need that much power in a YJ.
ratty mud drags? pulling?
Nay, no, no- those guys are more like 1200-1500hp LOL
11-28-2019 09:11 AM
Joe Dillard You and/or your mechanic need to invest in a good set of these. Somebody probably has a Black Friday sale on 'em.

11-28-2019 07:57 AM
JeeperDon I have no idea why someone would need that much power in a YJ.
11-28-2019 07:49 AM
mark1305 So don't just say you got it figured out - share what it turned out to be. This forum is all about sharing our info.
11-27-2019 08:19 PM
gsdrule
Quote:
Originally Posted by Dake View Post
He must have ran out of air
got it figured out
11-26-2019 04:59 PM
Dake He must have ran out of air
11-25-2019 05:29 AM
fishadventure
Quote:
Originally Posted by bruinjeeper View Post
Is this a good time to input a joke about hood vents?
No.

OP apparently hasn’t come back, either.
11-24-2019 02:32 PM
bruinjeeper Is this a good time to input a joke about hood vents?
11-22-2019 06:47 AM
87TPIYJ
Quote:
Originally Posted by fishadventure View Post
Maybe longer headers and a cam overlap overscavenging intake? I just donít see that with tunable efi; scavenging doesnít actually pull a vacuum, but too early injector firing I guess could dump a lot of fuel that could go out the exhaust and mess with the O2 sensor(s)?

I just didnít understand the question.
If he wants to optimize scavenging then 180 degree headers is where its at. Plus the sound of 180 degree headers on a v8 is rad. I doubt that packaging would fit though.
11-22-2019 05:49 AM
fishadventure Maybe longer headers and a cam overlap overscavenging intake? I just don’t see that with tunable efi; scavenging doesn’t actually pull a vacuum, but too early injector firing I guess could dump a lot of fuel that could go out the exhaust and mess with the O2 sensor(s)?

I just didn’t understand the question.
11-22-2019 05:44 AM
NHfireLJ What was your dyno numbers? Post up the graph...
11-22-2019 05:30 AM
Waternut I've got an LS in my Jeep and I'm familiar with the dyno tuning but never heard the phrase "running out of air". Usually when someone says the motor needs to breath more, they're talking about intake restrictions. Also very curious how they determined that your headers were the major restriction in the exhaust. Lastly, I haven't really heard of anyone in a full bodied Jeep say that a stock LS isn't enough power for them, much less an LS3. So what are you doing/trying to accomplish with this build?
11-21-2019 06:17 PM
fishadventure Describe running out of air... that phrase doesn’t usually come in nearby a sentence about headers.
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