DR heads, 268 cam, and Kooks headers, -- track times comparison - 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 99 (permalink) Old 03-22-2007, 07:52 PM Thread Starter
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DR heads, 268 cam, and Kooks headers, -- track times comparison

I installed the DR heads, 268 cam, and Kooks headers a couple weeks ago, here are my before and after 1/8 mile numbers:

-----BEFORE ----- AFTER
60' -----1.851 ----- 1.789
330' -----5.374 ----- 5.416
1/8 -----8.364 ----- 8.435
MPH -----82.34 ----- 82.40

I only got one run in tonight, but from past experience the first run is usually one of the best.

FYI, I haven't calculated DA, but the altitude and temp were comparable.



I'm too disgusted to comment further.

Anthony



Last edited by Grip Grip; 03-22-2007 at 08:20 PM.
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post #2 of 99 (permalink) Old 03-22-2007, 07:54 PM
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Re: DR heads, 268 cam, and Kooks headers, -- track times comparison

OUCH! Sorry to see.
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post #3 of 99 (permalink) Old 03-22-2007, 07:56 PM
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Re: DR heads, 268 cam, and Kooks headers, -- track times comparison

Something is very wrong, this is impossible. Something happen after the 60.

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.

MOD DIRECIONS
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post #4 of 99 (permalink) Old 03-22-2007, 08:03 PM
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Re: DR heads, 268 cam, and Kooks headers, -- track times comparison

That sucks man, but i'm more than sure its that darn ole' DC PCM holding things back. Without a true tune the car just wont open up.
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post #5 of 99 (permalink) Old 03-22-2007, 08:20 PM
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Re: DR heads, 268 cam, and Kooks headers, -- track times comparison

that's ***t up! I thought the head and cam combo from DR added an additional 75 HP at the wheels?
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post #6 of 99 (permalink) Old 03-22-2007, 08:22 PM
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Re: DR heads, 268 cam, and Kooks headers, -- track times comparison

Whats up with these #'s! That sucks!
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post #7 of 99 (permalink) Old 03-22-2007, 08:24 PM
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Re: DR heads, 268 cam, and Kooks headers, -- track times comparison

How does the Jeep feel now seat of the pants wise compared to right after the install? How many miles on it since going H/C/headers?
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post #8 of 99 (permalink) Old 03-22-2007, 08:25 PM
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Re: DR heads, 268 cam, and Kooks headers, -- track times comparison

75 at the wheels? different version, this one adds 1/10th to the quarter.

sorry couldn't resist. it's very frustrating spending time & money, having high expectations, and actually doing worse..wow.
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post #9 of 99 (permalink) Old 03-22-2007, 09:31 PM
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Re: DR heads, 268 cam, and Kooks headers, -- track times comparison

Don't give up hope. Any cel lights on? Did you run on the dyno? What air intake? My Mopar air intake put my modded truck @ lower hp #'s than stock. Stock on the Mustang dyno 317; after all mods and Mopar cai filter 301!!!! The filter on the Mopar cai cost me 56hp @ the wheels! I repeat 56 hp @ the wheels. I took off the restrictive filter and put on a 4"x 9" K&N filter and went up to 357 with the stall converter!


You can have all the power in the world, but if you can't get enough air to combust, you got nothin! My truck is going back to the dyno this wknd with an Arc1 to manually adjust the a/f readings. My truck was running 10.6 @ 6100. Way too rich. 12.3 will be just right.


Any a/f readings?


Brendan

'07 Jeep SRT8 black -1.65 60'; 12.03 @ 114.9 WITH TRACTION ISSUES- DR head/268 cam, Mopar cai with K&N filter, Vig 3200, Kook's, fan & traction mod, t-stat, BG II tune; 100 shot. (Dana 60 and turbo/s/c soon???)
'07 VW Eos 2.0T black -wife
'04 Audi S4 white; 6 spd...lease up
'02 Porsche 911 aero coupe silver; 6spd
'02 Bmw X5 4.6 silver; 13.4; Dinan Stg III - sold (w/ 170k miles)

Last edited by BDNJ; 03-22-2007 at 09:38 PM.
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post #10 of 99 (permalink) Old 03-22-2007, 09:34 PM
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Re: DR heads, 268 cam, and Kooks headers, -- track times comparison

Quote:
Originally Posted by Grip Grip
I installed the DR heads, 268 cam, and Kooks headers a couple weeks ago, here are my before and after 1/8 mile numbers:

-----BEFORE ----- AFTER
60' -----1.851 ----- 1.789
330' -----5.374 ----- 5.416
1/8 -----8.364 ----- 8.435
MPH -----82.34 ----- 82.40

I only got one run in tonight, but from past experience the first run is usually one of the best.

FYI, I haven't calculated DA, but the altitude and temp were comparable.



I'm too disgusted to comment further.
Very unfortunately NOT shocking. Sorry.
Bill
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