Help with upgrades to kill Porsche - 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 14 (permalink) Old 06-23-2007, 09:03 AM Thread Starter
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Help with upgrades to kill Porsche

Hello, a friend has bought a new Porsche 997TT and i'm ordering a kit to raise the power to 580 HP (flywheel), it should be a low 11 second car after the install, but he also has a GC SRT-8, and wants to know what mods are necessary to make it run about the same times of his soon-to-be-modded Porsche, i told him that a stroker kit and a ASM supercharger with the correct A/F ratio should do the trick, what's your opinion about those mods, it will be able to match the Porsche's acceleration?
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post #2 of 14 (permalink) Old 06-23-2007, 09:06 AM
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not a pro but im guessing no

13.20@103.50 BONE STOCK
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post #3 of 14 (permalink) Old 06-23-2007, 10:22 AM
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Should be a close race every time. He can take turns beating himself.

2006 GC SRT 8-Silver
Mopar CAI / Corsa Cat Back
Billet antenna and door trim
Mopar spoiler and Altezza Tails
Debadged (jeep) Rebadged (SRT8)
Forgeline wheels (20 in) and Toyos
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post #4 of 14 (permalink) Old 06-23-2007, 11:50 AM
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Quote:
Originally Posted by pato
Hello, a friend has bought a new Porsche 997TT and i'm ordering a kit to raise the power to 580 HP (flywheel), it should be a low 11 second car after the install, but he also has a GC SRT-8, and wants to know what mods are necessary to make it run about the same times of his soon-to-be-modded Porsche, i told him that a stroker kit and a ASM supercharger with the correct A/F ratio should do the trick, what's your opinion about those mods, it will be able to match the Porsche's acceleration?

Maximum power with forced induction is determined by the blower or turbo, not the displacement of the engine. Though a stroker will help spool a turbo more quickly, or give added low end with a blower, and make peak power lower in the band all else equal.
Bottom line you're going to need to go with a blower/turbo and run enough boost/make enough power to beat his power to weight ratio. To do so reliably will require a forged bottom end (stock displacment will do) a good fuel system, the ability to tune, and the aforementioned PA.
What kind of kit did you order?
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post #5 of 14 (permalink) Old 06-23-2007, 09:19 PM Thread Starter
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What kind of kit did you order?

http://www.sharkwerks.com/products.php?pid=114

That one
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post #6 of 14 (permalink) Old 06-23-2007, 09:22 PM
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My bad. I thought you meant for the GC.
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post #7 of 14 (permalink) Old 06-23-2007, 09:58 PM
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8K for two cats and two mufflers, lol! And some thought the Dynatech system for the GC was expensive.

Forged 413 Hemi w/Turbo, DTS diff, Suncoast tranny, Tec3 stand alone and juice.
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post #8 of 14 (permalink) Old 06-23-2007, 10:00 PM
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8K for two cats and two mufflers, lol! And some thought the Dynatech system for the GC was expensive.
BTW, 11 sec should not be a problem with a built engine and f/i in a GC. But I would think the Porsche would do better than that.
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post #9 of 14 (permalink) Old 06-23-2007, 10:33 PM Thread Starter
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Quote:
Originally Posted by GotStroke?
My bad. I thought you meant for the GC.
No, i'm ordering this kit for a 997TT, but we want to know what mods are necessary for a GC SRT8 for equal or beat the porsche's performance

Quote:
Originally Posted by 6.1 Turbo
8K for two cats and two mufflers, lol! And some thought the Dynatech system for the GC was expensive.
Porsche parts are incredibly expensive, i thought that's because there are not many options
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post #10 of 14 (permalink) Old 06-23-2007, 10:55 PM
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Quote:
Originally Posted by pato
No, i'm ordering this kit for a 997TT, but we want to know what mods are necessary for a GC SRT8 for equal or beat the porsche's performance

ET wise a 6.1 with built bottom end, ported heads, cam, and some boost from a blower/turbo will do it.
Cheapest route would be 150 shot plus full exhaust/bolt ons on the stock motor (again ET wise). That would put the GC around the same as a stock 997 TT.
Chris's T-trim stock bottom end 6.1 with ported heads and a cam should also run high 11s very soon.
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