UPSET w/ DYNO - Cherokee SRT8 Forum
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post #1 of 20 (permalink) Old 04-02-2007, 08:45 PM Thread Starter
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UPSET w/ DYNO

Here is my dyno run pre Heads/Cam/Headers/B&G.

I have a volant CAI and B&B


FASTmade Ediff & TCM switches, 170 Stant, B&B Catback, Dynamic Heads, FRE Hellfire Cam, Kooks LT's
ARIZONA SPEED & MARINE Vortech SuperCharger Kit, ASM Phenolic Spacers, UniChip,
B&G StageII, UniChip, Kenne Bell Boost a Pump, Walsh Racing Heat Exchanger.

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post #2 of 20 (permalink) Old 04-02-2007, 09:13 PM
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Re: UPSET w/ DYNO

Arghhhh! What the heck is up with those numbers? Uh thats lower than stock numbers. Are your PP heads on? That just doesnt make sense....
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post #3 of 20 (permalink) Old 04-02-2007, 09:16 PM Thread Starter
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Re: UPSET w/ DYNO

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Originally Posted by live4skins
Arghhhh! What the heck is up with those numbers? Uh thats lower than stock numbers. Are your PP heads on? That just doesnt make sense....

NOTHING just B&B with the volant.... the kicker is I ran a 13.1 @ 104

It was hot here today(upper80's) but how much does that affect things??

OH this was on a DYNOJET 2000 2wd Dyno
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post #4 of 20 (permalink) Old 04-02-2007, 09:27 PM
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Re: UPSET w/ DYNO

A lot of dynos are calibrated differently or incorrectly. The key is that you'll be able to see increases from changes.
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post #5 of 20 (permalink) Old 04-02-2007, 09:32 PM Thread Starter
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Re: UPSET w/ DYNO

that is what i am thinking. Because I pulled on a friends stock jeep when I ran the 13.1 and he ran 13.4/5 so its is faster.

This dyno would put his in the low 320's
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post #6 of 20 (permalink) Old 04-02-2007, 09:37 PM
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Re: UPSET w/ DYNO

Chris,
Your fourth gear dynos are going to read lower than others since most seem to use third gear. Also STD (SAE as well) correction accounts for weather related variables. Are you sure those aren't actual numbers?
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post #7 of 20 (permalink) Old 04-02-2007, 10:24 PM Thread Starter
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Re: UPSET w/ DYNO

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Originally Posted by GotStroke?
Chris,
Your fourth gear dynos are going to read lower than others since most seem to use third gear. Also STD (SAE as well) correction accounts for weather related variables. Are you sure those aren't actual numbers?
These are the STD # the SAE were even lower!!
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post #8 of 20 (permalink) Old 04-02-2007, 10:31 PM
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Re: UPSET w/ DYNO

Dynojets give higher numbers than a Mustang dyno.

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post #9 of 20 (permalink) Old 04-02-2007, 11:42 PM
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Re: UPSET w/ DYNO

Quote:
Originally Posted by StageFright
Dynojets give higher numbers than a Mustang dyno.
This used to be the case, but now it really varies by dyno; some MDs read like DJs, others do not. DJs were getting more business because they typically kicked out 7-10% higher numbers (some people claim 15% or more) which fed owner egos, even though MDs are clearly superior when it comes to actual tuning.
My Jeep was dynoed pre full exhaust (Dub, 176* T-stat) and put down 36Xrwhp and tq on a Mustang Dyno that reads like a DJ.

Last edited by GotStroke?; 04-02-2007 at 11:45 PM.
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post #10 of 20 (permalink) Old 04-02-2007, 11:47 PM
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Re: UPSET w/ DYNO

Quote:
Originally Posted by FastSRT8GC
These are the STD # the SAE were even lower!!
Yeah 2-4% lower. I didn't see a correction factor on the graphs so I thought I'd ask.

Honestly your numbers aren't that bad IMO as I believe I've seen a 317rwhp dyno in fourth gear with a stock Jeep SRT8.
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