My GSM P&P Heads Impressions

[BigC]

OK Here is my post on GSM P&P Head & Intake.

I'm pressed for time this morning so bare so sorry for the short cuts.

Firstly, I had some pics of the exposed heads, but I left my camera in LA and I'm now in B-field for the next 10 days. I'm not going back just to get it, and did not want to wait. Besides 2KWK my pics would not added too much more than the pics he posted on his thread bellow.

http://www.chargerforums.com/forums/...ad.php?t=10743

Originally Posted by 2KWK4U

BigC,

When are you going to be posting your dyno numbers from the P&P install?

Originally Posted by BigC

When I get the print outs from GSM. Like I posted earlier I was soo excited I run out with out my invoices or dyno charts. Roughly though, 380 rwhp to start and 439 rwhp post. I was expecting more based on what a freind got ater p&p head install, but he had some significant street miles with the new heads before he could get on the dyno for after mod data. His end result was 448 and he started with 378. Scott says that the end dyno numbers improve with millage because the computer has time to "learn" the new set up and adjust A/F accordingly.

The Dyno Chart is attached below. Sorry for the quailty. I know the torque curve is hard to see. I just got my scanner & I have yet to figure out how to make it scan in color.


Impressions:

Sorry to post our PM conversation Dan, but I'm too lazy to type a fresh impression.

Originally Posted by BigC

Yeah...I know. My wallet is still hurting from the hit, but I'll get over it. LOL!!!!

Originally Posted by BigC

Significantly faster....

I little more from stand still, but after 1500 rpm there is a big improvement. The power continues to build as the revs rise, and after 2500 rpm this sucker starts to REALLY takeoff! At 3500 rpm you can really feel yourself being pushed hard back in to the seat! I have to be careful now because it goes so much more faster from the same throttle input. It is really much better in passing situations on the freeway. Where as before you were in no-mans land at 50-65 mph, you know too fast for 2nd but too slow for 3rd. Now third gear is at the foot of the power band when you down shift, and when you go WOT it takes off nicely. Before the mods people were sometimes surprised at how well you can pull away, but not blown away. A lot of people would either try to challenge you or take off after you and try to use you as a pace car. Now, people get shocked at how fast you can pull away, and the sound is incredible (as you know having the Magnaflows yourself). You can see the WTF! look on their faces in the review. Hardly anyone tries to challenge, cause you've either pulled away so fast or they are intimidated....This thing is great!

I rode with Scott at GSM in the supercharged SRT8. That thing is scary. It pulls from a dead start like my car now pulls from 3500 rpm....Like a freight train!

I am really happy with the Mods I have done to this car. I feel like the car is set up now the way it should have been from the factory if the bean counters were not so tight and Big Brother Mercedes not so threatened. (I may have said that before?)

[Doyle]

BigC, your impressions seem very much like my own, right down to the feeling that this is the way it should have come out of the factory. The car definitely will get stronger as the computor adjusts/learns. The difference between now and when I had the porting done almost 3 months ago is very noticeable. Can you imagine what this monster is going to be like with 3.7 gears? Good luck and enjoy!

[WhiteDiamond]

Nice numbers!!! Definately the next mod on my list.....

Todd

[jconnolly1119]

................

and that's all I have to say

[freakyshiat]

did you get the headers and valve springs too or just the heads?

[BigC]

Originally Posted by freakyshiat

did you get the headers and valve springs too or just the heads?

I got the heads intake, catted mid-pipes and catbacks......no headers. I'm sensitive to noise.....the mi-d pipes are easier to reverse if I can't take it....also if I want to sell it in CA with the emissions laws.

[freakyshiat]

so no valve springs either right?

[BigC]

Originally Posted by freakyshiat

so no valve springs either right?

I got the springs.

[jconnolly1119]

Originally Posted by BigC

I got the springs.

which will probably be worth it's wait in gold once cam(and tuning) options become available.....

I'm seriously considering doing exactly what you've done....everything but the headers..........at least for the time being

[freakyshiat]

I did the headers for labor reasons, might as well since it will be all out anyway