Old_Goat

My best (2005 GTO A4 LS2 400 hp, about 330 rwhp) bone stock, full and normal weight was a 13.67. Not sure of the 0-60. The races were done at Houston Raceway Park. From the tune I gained about 20 rwhp, call it about 350. My best with tune, drag radials, and exhaust cutouts was 13.13. After adding a 3200 vig stall, and headers, I was right at 375 rwhp and my best was a 12.126 @ 110.56.

Here is a thread on how I got from 13.67 to 12.12.

http://ls1gto.com/forums/showthread.php?t=114824

Here is another thread that was my best day ever at the track.

http://ls1gto.com/forums/showthread.php?t=140898

1 Bad Mirada

your stock rwhp seems low to me...is that corrected? what kind of dyno? i know someone who has put an ls2 gto a4 on a dyno, and he was in the 360rwhp range, but i believe that to be uncorrected, on a dynojet..

your short times are pretty awesome...im amazed that you were able to pull those with Nittos. did you do any suspension work?

1971Chall

In either this month's or last months Mopar Action magazine they did some bolt on mods to and SRT-8 Magnum. The car ran a high 12(12.9X's) stock and with the bolts on's got down to 12.20's or 30's if I recall correctly. Great article and highlights the potential. I think a stick SRT-8 with bolt on's(no power adder) should probably make it into the 11's(with a good launch). Hopefully this question will get answered in the near future.

Chris

Low 12s? On street tires?

JJMPB

doesn't sound right to me either

Old_Goat

I'm not sure what type of dyno it was. I believe the shop had two of them, one a Mustang and the other a dynojet (I think this is correct) and mine was done on the one that has been known to show lower numbers. One thing a racer buddy of mine told me is not to worry about the dyno numbers, and take it to the track. He is right because the dyno numbers won't reflect a 3200 torque converter and (at least on the GTO's) the 3200 was good for about .4 in the quarter. A lot of guys on the GTO forums are amazed that myself and a couple of other buddies were able to run 12.teens without cam or head work.

The Nittos are great tires and a lot of GTO guys swear by them. One thing I like about them is that the wife could drive the car in the rain, and the traction was still OK. I always felt that you should start at the tires and work your way up. What good is it to have 450 rwhp if you can't launch?

I did not have any suspension work done, however almost put on some drag bags.

If I pull the trigger and buy a Challenger, I will probably take the same program with my mods. One thing I will have to do is find out who the quality tuners and quality MOPAR people are in the Houston area. I will start with tires, tune, headers and exhaust cutouts, and a 3200 or so stall. I will have to do some homework and see what a stall will do with the 6.1 hemis on the 300 and Charger, and what the tune will do. Headers, exhaust cutouts, and drag radials are pretty much universal, but some cars react differently with tunes and a torque converter.

1971Chall

I will have to look at that but I'm pretty sure they used drag radials. We had a Charger SRT-8 here at Milan that ran a 12.30@113mph with pretty much the same bolt ons(no power adders). The 6.1 is strangled a bit in stock form(even for 425hp). They run good don't get me wrong but there is a decent amount still left on the table. Check out Mopar Action, it's a pretty good article. It may be online also.

1 Bad Mirada

my DRs are street legal, so ive run low 12s on street tires too...