Dynamic Racing SRT-8 Heads/cam 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 76 (permalink) Old 12-01-2006, 11:05 AM Thread Starter
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Dynamic Racing SRT-8 Heads/cam dyno

well guys you asked for it, we made the trek down to the AWD dyno in El Paso today with both jeeps.

I knew people were going to ask about the MPG thing so on the way there both jeeps got up to 90 mph and set the cruise and reset the MPG trip comp. The stock heads/cam 07 got 15.5 mpg, the Heads/cam 06 got 15.2mph at 90mph.

Now about the Dyno, it’s a AWD Mustang Dyno.

1st up was the 07 base line (GSM CAI, GSM TQ/fan mod)

Dyno set to record the pull from 2500rpm to 6000rpm (found there was no point in going past 6000 rpm on the stock heads/cam at 6000 rpm the power it already starting to level off and even drop slightly)

PK AWHP 346
PK AWTQ 341

That was the best of 3 pulls

Next up was Ekools 06 (DR- heads/ cam, Dub CAI, GSM TQ/Fan mod)

1st pull Dyno still set to record from 2500rpm to 6000rpm

PK AWHP 419
PK AWTQ 413

Power was still going up when the dyno stopped recording at 6000 rpm. So we decided to do the next pull to 6100rpm, and hot lapped right back to another pull no cool down.

PK AWHP 421
PK AWTQ 417

The gain in HP from the extra gain in HP from the 100rpm was no big surprise, but the gain of 4 ft’ lb of TQ down low surprised me, I guess the thing liked the heat.

I wanted to try pulling it higher but Ekool the owner of the jeep was happy with a 75 AWHP gain! and did not want to push it any more up in the RPM, but there would for sure be more power going up some more in RPM seeing how the power is still going up at the end of the pull.

Now the best part, at 2500rpm where the pull recording starts the stock heads/cam truck is making ~285 ft/lb of TQ, the Heads/cam car is making 350!!! So this power gain is not just up top!!


The Dyno shop is going to be E-mailing us the dyno charts so we can post them most likely tomorrow. If they don’t I’ll just take a picture of these printed dyno charts and post the picture.


peek TQ stock 4700 rpm (341 awtq)
Peek TQ modded 4600rpm (417 awtq)


There is ALOT to be said for correctly ported heads were low and mid lift #'s are looked at and not just high lift #'s. We spend over 200 hrs of R&D on and off the flow bench to get exactly what we were looking for. And the best peek # we could get at a lift # that no cams for these cars have is NOT what we were looking for, unlike allot of shops I have seen

Talk about sleeper power! No headers, stock Exhaust and 75 MORE Wheel HP! This truck drives and for the most part sounds like a stock truck. I can’t wait to see what Headers/Exhaust and a tune will do.

Now remember thise are SRT-8 JEEPS with AWD and the Drive line power loss of bigger tires and AWD. I would expect to see at least 20 more RWHP on a RWD 300c or charger.

so 75 ALL WHEEL HP for $1999 (most likly ~100 at the crank)

link to pkg

http://www.dynamicracing.com/custome...cat=204&page=1

the cam is the XFI268

Stock heads/cam, GSM CAI, GSM TQ/fan mod



Dynamic Racing heads/cam, Dubs CAI, GSM TQ/fan mod (pull to 6000rpm)



Dynamic Racing heads/cam, Dubs CAI, GSM TQ/fan mod (pull to 6100rpm)


Last edited by FastMatt; 12-06-2006 at 04:48 PM.
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post #2 of 76 (permalink) Old 12-01-2006, 11:09 AM
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Re: Dynamic Racing SRT-8 Heads/cam dyno

holy ****! nice number's!
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post #3 of 76 (permalink) Old 12-01-2006, 11:16 AM
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Re: Dynamic Racing SRT-8 Heads/cam dyno

Agreed. Nice numbers indeed. What's area under the curve look like?
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post #4 of 76 (permalink) Old 12-01-2006, 11:21 AM
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Re: Dynamic Racing SRT-8 Heads/cam dyno

and Mustang dynos always put down lower numbers than whats realistic. On a dynojet that thing would be putting down close to 450. Thats incredible.

Tell me theres a pic or a vid?
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post #5 of 76 (permalink) Old 12-01-2006, 11:22 AM
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Re: Dynamic Racing SRT-8 Heads/cam dyno

how much should we expect to pay for labor?
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post #6 of 76 (permalink) Old 12-01-2006, 11:29 AM Thread Starter
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Re: Dynamic Racing SRT-8 Heads/cam dyno

Quote:
Originally Posted by rainmaker
Agreed. Nice numbers indeed. What's area under the curve look like?
realy good, power all the way. We should have the charts up soon.
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post #7 of 76 (permalink) Old 12-01-2006, 11:30 AM Thread Starter
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Re: Dynamic Racing SRT-8 Heads/cam dyno

Quote:
Originally Posted by BadSRT-8
how much should we expect to pay for labor?
We are Charging $1200 for install
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post #8 of 76 (permalink) Old 12-01-2006, 12:16 PM
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Re: Dynamic Racing SRT-8 Heads/cam dyno

does that include gaskets and other odds and ends?
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post #9 of 76 (permalink) Old 12-01-2006, 12:16 PM
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Re: Dynamic Racing SRT-8 Heads/cam dyno

Well guys, after our dyno day with the Jeep's all I can say is wow!! I'm not a stranger to H/C setups as for I currently have a nice H/C setup on my Z06 and ekool's Jeep just blew my away with the ease of the install and the benefits from it!! Seriously, just Heads + Cam = 75awhp increase! NO TUNE, STOCK IDLE, NO HEADERS AND NO EXHAUST WORK! I'm going to give you a second that thing about that.....

I have spent close to $7,500 on my H/C on the vette for almost the same increase and it's doesn't sound or drive anything close to stock, but that's fun in a vette

So, spend a bit more and get H/C insted of headers with three times the performance!

Last edited by El Calor; 12-01-2006 at 12:20 PM.
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post #10 of 76 (permalink) Old 12-01-2006, 12:24 PM
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Re: Dynamic Racing SRT-8 Heads/cam dyno

PS - I was really happy with my baseline on my 07 of 346 awhp and 341 awtq

Time for the modding to begin
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