RonSSNova

So according to the NWS, we had Density Altitude about 250 ft.
Did my car care? Noooooo
Did I have the skinnies on? Nooooo
Set a PB?
Nope.
11.14 @ 122

I am happy to say that I fixed the trans shifting issue, it was flawless.
Found a neat 4L60E tuning spreadsheet that seems to be excellent.
The no shift/stopped data logging was caused by a bad OBD2 ground pin connection.

Also happy to say the Hoosier 275's are great. Never spun. 60ft between 1.58 and 1.60.

Worked on low rpm timing and I think I got rid of the odd KR that would happen at the hit, once and awhile. Thanks for the tip Ron. AKA 98TAdriver.

I almost think they had the mph clocks tossed into place. I saw 2 1/8 mile mph at 99.5 but less than 122 at the finish line? Should have gone 124. There was no headwind.

So because only 12 cars showed up, they sut down early, just when I was making tuning progress.

Thought I'd mention. Want to turn your low 11 sec C5 into a high 11 second car? Leave in second. I made 2 runs like that to get MAF calibration data. 11.8 @ 120.8.....next run using low, 11.14 @ 121.4. Interesting huh? Hardly any mph diff. Also a good way to see the converter work if logging with HPT. The rpm went to 4100, and sat there until the mph caught up. FWIW, the trans temp never went above 150.

Hope you guys don't mind me putting this stuff up.

98tadriver

glad to hear your car is hooking ( I love my hoosier 275's as well!) and trans is shifting! 99mph trap in the 1/8th is awesome. What did you used to trap in the 1/8th prior to these runs? If you want, email me your datalogs. I made a few passes the other night as well. Figured out why my car sometimes hesitates off the line. it was a lean spike. cant remember the exact Hz, but i made some corrections and it was good on the next pass.

pit-man

Damn Ron,
get that 60' down a liitle, skinnies and cold air you will move down to around 10.85

GARY2004Z06

Robz was onto something when he found that tire so long ago.

RonSSNova

Ron,

After looking at the time slips, only the right lane showed that mph. The left lane was 97.5. So that 99.5 is bogus. Maybe the right lane had better air......fastest I've ever seen is 98 and that 1/4 mph was 122.8.
I'll send you a log or two in a bit.

VERY happy the trans shifted.

Wed even is normal bracket night. So no street cars! No water drug all the way to the starting line. The bracket program is over, so just test and tune now. there are a couple more on the calendar, so might get lucky with the weather.

Ron

Rob Petyo

I thought Rob had run a 16 inch tire

I assume you are running the 17" not the 15's .. I'm going to be trying the 15's, once spindles are available

I certinally don't mind, this is how we learn, from others expermenting

ajrothm

Good job on figuring out the tranny problem! Keep at it!

Keep those damn skinnies on there... You need all the help you can get to get that 10.99...

Thats how my car was about a 10.59..... I could NOT get it below a 10.70..... even with all the little tricks, -800 DA...everything... Then FINALLY at a track rental day with all the tricks in place, -800' DA, and even a 8-10 mph head wind... It went a .69, .63, .61 and finally...a 10.59.... I quit while I was ahead. All 1.51-1.52 60's

I raced it a few weeks later in +800' DA, no skinnies, all belts in place and at a different track and it only went a best of 10.74...and a few high 70s.... Best 60' was only a 1.56 and that was dead hooking.

She is a picky ole b*tch, thats for sure...

You're doing a good job with yours, just have to get all the ducks in a row at the same time.

GARY2004Z06

I did not say that he ran the 17s. He picked out the Hoosiers to try them on one of the cars and the results were great. I believe that Latona may have been first. (Not sure about the size.) I remember Troy and Tommy using them. We put the 275x40x17s on the C5Z. Rob did run the 16s on his car. Everyone else was running MTs.

LS1LT1

I think Joe was on the 16s (255-50-16) but I also remember you making the 17s work very well for you on the yellow car.

RonSSNova

I have the 275/40/17. Also have a pair of the 245/45/17's. I think they would have been just as good last night.

I run Hoosier radial slicks on my Nova. 9X30. They dead hook every time and the car has been 1.32 in 60ft.

Ron

Rob Petyo

So Joe was actually the first to run the Hoosiers

He was also the one who steered me right in regards to installing a (Carroll's) roll-bar - I was able to keep my oem seat-belts with his advice

C5 Pete

I credit Gary and Rob with steering me to the Hoosier drag radial in my bolt on blue vert.

Great tire for what I was trying to accomplish.

GARY2004Z06

You can call him the guinea pig. They did not just magically appear on his car. It's truly amazing the minutia that was speced out by the group for these cars which set so many records that year.
Thanks but we wanted to just help you out. We new that they would work for you even before you put them on. You did unbelievable things with your car. Your driving was awesome.

GARY2004Z06

Although you may have had a low DA, the air quality may not have been as good. You may wish to track air temp, humidity or water grains and the barometer. Not all DAs are created equal. I would prefer a slightly higher temp as long as the humidity is low and barometer is high.

RonSSNova

Ah, I wondered. Humidity was 76% Hardly crisp dry air.
I did speak with a friend who has 1000's of laps on his car, and he saw no improvement in his times either.

We don't get those conditions in the fall very often.
I have raced for years, in a variety of fast cars, and on those crisp days, you can really feel the improvement in high gear. The car just marches. And the MPH goes up......more hp pure and simple.

Thanks!

Ron

GARY2004Z06

Yes, crisp air is a great way to describe it. When breathing it in, you can feel the freshness and how exhilarating it can be. Our cars must feel the same way.
Good luck on your next outing.