Dyno - Cherokee SRT8 Forum
WK1 General Performance Discussion If you are planning on modifying your Jeep Grand Cherokee SRT8 with a performance enhancing modification, this is the section to post about it.

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post #1 of 49 (permalink) Old 03-21-2007, 07:51 PM Thread Starter
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Dyno

I started this thread for one purpose.
please list your dyno #'s w/ mods and or quartermile times... lets see what this forum is made of.


ANYONE LOOKING FOR A AWD DYNO IN THEIR STATE PM ME.

2007 GC SRT 8 (sold)
2004 SRT 4 (sold)
2005 E55 ///AMG
2003 SVT COBRA 660/654wheel
2006 Lincoln mark LT

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Last edited by tommy25000; 03-21-2007 at 08:42 PM.
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post #2 of 49 (permalink) Old 03-21-2007, 07:57 PM Thread Starter
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Re: Dyno

I ran my truck on the dyno today. conditions are as follows
58.17*F, 29.42 in-hg, humidity 58%, uncorrected: 1.00


Max power=356.45
Max Torque=357.02
this is obvioulsy all wheel hp.
A/F ratio 12.4- 12.6 steady up to 4700 then went to 12.1 to 12 flat to redline

also for the record this is w/out kooks. they go on friday. I will post the dyno results before and after for that also. and this was done on a dyno jet
also these where 3rd gear pulls i believe
one note... my transfer case feels like its binding on and off... may have lost power to that, overall happy with these #'s

mods at time of dyno GS cai, magnaflow, jet chip.
we also tried to run it w/ out the chip... lost 6hp after disconecting the battery. this figure is inconclusive in my opinion. the hp numbers kept changing wehen the chip was out... pcm was confused.
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post #3 of 49 (permalink) Old 03-21-2007, 08:02 PM
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Re: Dyno

7 months ago ran a 13.4@101.56. Mods were gs cai, corsa exhaust. 2nd run of the night then I had to leave. Hope to be in the high 12's next month!!


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DR Heads-Comp 268 Cam, Zex kit w/plate, Kooks LT's Hi-Flows
Mopar Cat-Back, BWoody CAI, B&G 2/Predator, Spacers, 180 T-Stat, Iridium Plugs,Tinted Tails, Color Matched Brembos and mouldings, 8000k Headlights-Fogs, Toyos, Fan mod, TC and RWD mod, pistol grip shifter--SOLD
FBO 335i 400+whp-SOLD
2010 Ram CC--Daily Driver, patiently awaiting 2nd Gen Jeep SRT8!
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post #4 of 49 (permalink) Old 03-22-2007, 01:28 AM Thread Starter
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Re: Dyno

Is anyone in the 400awhp range yet?
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post #5 of 49 (permalink) Old 03-22-2007, 08:07 AM
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Re: Dyno

There are a few with heads and cam. They for sure will be in the 400's. I should receive my H/C in a week or so. I will try to dyno it before and after.

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 #6 of 49 (permalink) Old 03-22-2007, 09:24 AM
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Re: Dyno

We need to pay more attention to the gear used to dyno in. I don't think anyone's broken 400whp in 4th gear with H/C yet.
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post #7 of 49 (permalink) Old 03-22-2007, 10:47 AM Thread Starter
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Re: Dyno

400 awhp is a F*CK load. cant wait to see how its done!!!!
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post #8 of 49 (permalink) Old 03-22-2007, 11:38 AM
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Re: Dyno

Matt/Dynamic Racing made 420/417 awhp/awtq with his H/C with aftermarket CAI and stock exhaust from manifolds to tailpipe. That was a third gear pull fwiw.
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post #9 of 49 (permalink) Old 03-22-2007, 12:50 PM
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Re: Dyno

Quote:
Originally Posted by GotStroke?
We need to pay more attention to the gear used to dyno in. I don't think anyone's broken 400whp in 4th gear with H/C yet.
Why would they be doing 4th gear pulls? I alway thought most cars 3rd was best for true #,s... But I don't know much about dynos.

I guess we will have to recommend 3rd gear pulls to our dynoers.

Thanks of the heads up Stroked!!
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post #10 of 49 (permalink) Old 03-22-2007, 12:57 PM
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Re: Dyno

Quote:
Originally Posted by FastSRT8GC
Why would they be doing 4th gear pulls? I alway thought most cars 3rd was best for true #,s... But I don't know much about dynos.

I guess we will have to recommend 3rd gear pulls to our dynoers.

Thanks of the heads up Stroked!!
When I did my dyno pulls I did them in fourth. FWIW fourth is 1:1 gear ratio, third is 1.41:1. You want a gear ratio as close to 1 as possible for accuracy. Anything above or below that might give false numbers.

http://www.wkjeeps.com/wk_srt8_specs.htm
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