C2367

Went to run test and tune last night at Irwindale, in the past In the C6 I had could hook great but this C7 would not Hook with my M/T DR's. I only got one OK pass that came close to hooking. I went thinking I would hook and get into the 1.6's 60' and 7.5's in the 1/8 but did not happen. The strip prep was BAD, should of stayed home.

10mm_

1.76 isn't bad at all, what are your mods?

C2367

I have no mods, A8 with NPP, just DR's that did not dead hook. That run was the with the least amount of spin. Had a slight head/ side wind, the temp at the time was around 76 degrees. At this strip I have always done better then at Fontana with my C6 LS3 on the 60' and the 1/8 so I went to see what my C7 would do. Only this one run was close to OK.

10mm_

That calculates to an 11.95 in the 1/4, that's just about right for a stock A8 on a 76 degree day. Did you calculate the DA? Was it humid?


I'm surprised you didn't get drag radials to hook, the track must have been terrible. My stock tires hook great, I an pull 1.78 - 1.82 60's just footbraking it with little effort.

C2367

They don't prep very well here and yes it was more humid. I have got 11.78 in the 1/4 in Fontana Best to date Dead hooking with close to the same 60 & 1/8. I have always done better at Irwindale over Fontana in the past. I know the car has more but it maybe to soon to tell due to only having 2650 miles on it. It seems that most cars I have owned start running better around 17,000 miles.

10mm_

True some miles usually open the engine up a bit.

The DA was 1252 ft when you ran, if the air had been "perfect" and you were at sea level you would have run about 7.50

C2367

That was what I was trying for, just wrong conditions.

Dave01GT

My best 1/8 stock with Mickeys in my a8 was 7.72 with a 1.7x 60' so it doesn't sound bad to me.

C2367

Yes it was ok but I really went thinking it would dead hook at this strip and get in the 1.6's and 7.5's. I know this car well do better but what was bad is that I did not hook 100 percent on any run and spun really bad on all the other runs. I guess all things considered it was a good run.

10mm_

How much did you heat the tires up?

C2367

About the same as always that has worked in the past. I don't do those crazy long heat-ups. From what I read in the past the M/T should not need a crazy long heating. I know one of the problems is that the tires are around 5 years old now and I heard as they get older the rubber get's harder. The tires have been sitting in my garage without use for about 4 years. I used them on the 09 C6 Z51 I had and they still have a lot of run's left on them to go.

10mm_

Car looks great! You bring up a good point about the tires, they should not require long burnouts but it is possible they are harder from sitting so long.

Maybe try your stock tires or borrow someone else's and see if you can isolate the issue to the tires?

123sugey

The tires are toast sitting that long. Buy another set

C2367

I think that is it, I well do that in the fall because I don't run in the HOT months, don't want to go slow. Here they only run the 1/4 a few times a year and it not at night where each run get better. I do hook-up good at Fontana with the tires for most runs.

C2367

The car I ordered, it is a base 1LT with only 3 options, NPP, A8 and ZF1. I did this free mod, do you think it may put more air into the passenger side front finder? It looks like it get very little air in at the front at the edge if the grill.

Mike Campbell

I hate 1/8 mile strips! I've gone to one nearby where I live and have run at least a dozen times. Like you I had a best 60 ft time of 1.8 but couldn't hook worth a hoot. Plus we had people with FWD go thru the water box and drag water on to the track. When I ran for years up at Englishtown NJ they'd kick you out if you went thru the box with street tires. The track prep wasn't the best down here but worse than that was 1-2 and 2-3 shifts I'd break loose and have to let off. Sucked. I will go up to Bradenton (1/4 mile) in the fall when it cools a bit here. They're supposed to be a better prepped track. Good luck with your efforts. Find a better track and try it again there.

10mm_

Looks like it sure won't hurt!
Did you do a write up on what you did?

C2367

Didn't do a wirte-up yet, do you think I should? It was very easy and quick to do and came out looking not too bad. I thinking it may get more air and cooler. I did something like this on a Firebird I had due to it getting air from the drivers side front finder at the bottom.

10mm_

I would like to see a write up, I think with the high IAT's these cars can have it may be a big benefit to have more fresh air coming in. Has anybody made an elbow or scoop to grab air off the bottom?

C2367

It would be nice to have a scoop designed put behind it made of some similar material that cold have some flex to it due to low clearance. This could help put colder and more positive air pressure that should help at speed.