NJFBOA - Home of New Jersey's Camaros and Firebirds - View Single Post - Getting my new 406 SBC installed, running, and driving

IROCZman15 · 11-01-2024, 08:26 PM

Took a while to get this typed up, but here is a recap from last Friday 10/25/24 and the track rental at Island Dragway.

Thanks to Jerry for the event photos and thanks to Joey D who got a few good videos of the launch.

One of the new things I was testing out was a set of new-to-me Hoosier QTP Bias Ply tires, bought from my good buddy. They are a 27" tall tire and I put them on a set of the same size 15"x8'' Jegs SSR wheels. I drove to the track on the 28" tall MT ET street radials and made the first 4 passes on them that day. Swapped over to the Hoosiers for passes 5-11. Didn't really get to test their true potential on the launch, but did get a few mid 1.4x sixty foot launches. The starting line was tricky that day, but a few people figured it out. As expected, I did notice a slow-wobble wander from the tires as it went down the track, mostly midway through second gear and less on the top end. Some of my rear-view camera footage shows it. I started with 16 psi in the bias plys and then 15 and then 15.4 psi. Would like to do a burnout with them and see what the contact patch looks like for psi decisions but next time out I might start at 16 again.

I have all the datalogs with footbrake launch rpm and shift rpm on them too but its many to post up.

Pass 1: just a easy shakedown run, nothing unusual. MT ET streets. It spun a bit on the launch, so a slow 60 foot.

Pass 2: Made a better pass, mostly due to a better launch, and was happy to see a new PB at 11.58 compared to my previous 11.60. MT ET street radials, and still a slower 60 foot than possible. Shifted 1-2 2-3 and then 3- lockup .

Pass 3: Turned on the 150 nitrous shot Still using the MT ET street radials, this pass they were set at 18 psi. I do actually think my rear passenger side air bag was set close to correct, at 25 psi (drivers side was 8psi) because the car doesn’t squat as hard to the right rear anymore and also seems to keep the rear drivers side from body lift. But despite that I still spun on the launch. I had to do bit of pedaling and over revved the 1-2 shift

https://www.youtube.com/watch?v=cPeKz4dIKWs

Pass 4: Last pass with the MT radials, and the 150 shot, and it went:

https://www.youtube.com/watch?v=c54mbwOOGhg

11-01-2024, 08:26 PM	#643
IROCZman15 10 Second Club / Meet Coordinator Join Date: Dec 2004 Location: Roxbury, NJ Posts: 2,135 iTrader: (8)	Took a while to get this typed up, but here is a recap from last Friday 10/25/24 and the track rental at Island Dragway. Thanks to Jerry for the event photos and thanks to Joey D who got a few good videos of the launch. One of the new things I was testing out was a set of new-to-me Hoosier QTP Bias Ply tires, bought from my good buddy. They are a 27" tall tire and I put them on a set of the same size 15"x8'' Jegs SSR wheels. I drove to the track on the 28" tall MT ET street radials and made the first 4 passes on them that day. Swapped over to the Hoosiers for passes 5-11. Didn't really get to test their true potential on the launch, but did get a few mid 1.4x sixty foot launches. The starting line was tricky that day, but a few people figured it out. As expected, I did notice a slow-wobble wander from the tires as it went down the track, mostly midway through second gear and less on the top end. Some of my rear-view camera footage shows it. I started with 16 psi in the bias plys and then 15 and then 15.4 psi. Would like to do a burnout with them and see what the contact patch looks like for psi decisions but next time out I might start at 16 again. I have all the datalogs with footbrake launch rpm and shift rpm on them too but its many to post up. Pass 1: just a easy shakedown run, nothing unusual. MT ET streets. It spun a bit on the launch, so a slow 60 foot. Pass 2: Made a better pass, mostly due to a better launch, and was happy to see a new PB at 11.58 compared to my previous 11.60. MT ET street radials, and still a slower 60 foot than possible. Shifted 1-2 2-3 and then 3- lockup . Pass 3: Turned on the 150 nitrous shot Still using the MT ET street radials, this pass they were set at 18 psi. I do actually think my rear passenger side air bag was set close to correct, at 25 psi (drivers side was 8psi) because the car doesn’t squat as hard to the right rear anymore and also seems to keep the rear drivers side from body lift. But despite that I still spun on the launch. I had to do bit of pedaling and over revved the 1-2 shift https://www.youtube.com/watch?v=cPeKz4dIKWs Pass 4: Last pass with the MT radials, and the 150 shot, and it went: https://www.youtube.com/watch?v=c54mbwOOGhg __________________ 1987 IROC-Z - modified Last edited by IROCZman15; 11-01-2024 at 09:00 PM.