Discussion of Chassis Setup for 8 Sec. Assault
- Thread starter Alky V6
- Start date
I haven't done that yet. I'm waiting for the local track to setup the scales again. They do that at special events.
Finished the Pinks event and came away with new bests for the car, again. I'm amazed.
1.339 60' et
3.711 330' et
5.671 1/8 et
126.10 mph
7.344 1000' et
8.769 1/4 et
156.81 mph
With one cylinder leaking down over 60% and most of the others at over 30%. The engine is way overdue for a freshen up.
On this pass the fueling leaned on the top end and the engine rpm was fluctuating as if on a rev limiter. Time to upgrade the fueling system.
I had to lower the nitrous turn off point, lower the launch rpm/boost level and raise the wheelie bar 12 adjustment turns from my normal 2 inorder to get the tires to hook at the launch. The launch pad was in horrible condition. Local racers confirmed this. Still, I was able to get a 1.33 60'.
On one run over the weekend, 158.69 mph.
1.339 60' et
3.711 330' et
5.671 1/8 et
126.10 mph
7.344 1000' et
8.769 1/4 et
156.81 mph
With one cylinder leaking down over 60% and most of the others at over 30%. The engine is way overdue for a freshen up.
On this pass the fueling leaned on the top end and the engine rpm was fluctuating as if on a rev limiter. Time to upgrade the fueling system.
I had to lower the nitrous turn off point, lower the launch rpm/boost level and raise the wheelie bar 12 adjustment turns from my normal 2 inorder to get the tires to hook at the launch. The launch pad was in horrible condition. Local racers confirmed this. Still, I was able to get a 1.33 60'.
On one run over the weekend, 158.69 mph.
Squid4life
Well-Known Member
- Joined
- Jul 5, 2004
Yeah Donnie, on your fast pass there was a lot of swearing in the stands; "Holy sh!t" as everyone stood up to watch. The car was definitely a slingshot, was hard to keep up with it with the camera. I got some videos that I will get to you. Nice runs, and congrats!
Being a turbo buick guy.......
I was so delighted to see 2- 8 sec turbo buicks at pinks,
every time Dicks, or Donnies buick came to the line , the crowd paid attention! the comments were the best, from holy sh!t, to my favorite........
DO ALL GRAND NATIONALS RUN LIKE THAT?! ( of course I said yes! LOL)
I had the best time ever !! people came by in the pits and were amazed at
the engine, nothing but positive comments, all were very delighted to see a
"Grand National" running that quick,
I want to thank Donnie for allowing me to assist him , what little I did,
it was my pleasure to be a small part of the FUN !
THANKS
I was so delighted to see 2- 8 sec turbo buicks at pinks,
every time Dicks, or Donnies buick came to the line , the crowd paid attention! the comments were the best, from holy sh!t, to my favorite........
DO ALL GRAND NATIONALS RUN LIKE THAT?! ( of course I said yes! LOL)
I had the best time ever !! people came by in the pits and were amazed at
the engine, nothing but positive comments, all were very delighted to see a
"Grand National" running that quick,
I want to thank Donnie for allowing me to assist him , what little I did,
it was my pleasure to be a small part of the FUN !
THANKS
Thanks. I was using the same language in the car myself.
Thanks, Charlie.
That's funny.
Lee, thank you. You're help took all the stress off of me. I had a blast and I'm glad you did too.
I'm still working on increasing power ramp up just after the initial hit at the launch. Once I've found the limit of the power ramp up, I'll start playing with the shocks if the bounce is still there.
It doesn't look like much, but that was actually a 1.33 60'.
Here's an example of the type of launch I was fighting at Pinks. This run was after attempting to de-tune the launch and raising the wheelie bars a bit. The run before this was even worse. Didn't get that run on video.
Go to time frame 2:27 for the beginning of the launch.
[YOUTUBE]http://www.youtube.com/watch?v=N_Rv1vad9Cw[/YOUTUBE]
Go to time frame 2:27 for the beginning of the launch.
[YOUTUBE]http://www.youtube.com/watch?v=N_Rv1vad9Cw[/YOUTUBE]
Now that the car has been through the 1/4 mile with the latest changes, I'm seeing some marking on the up pipe from the cutout in the hood. It appears the hood is being pushed down onto the up pipe at high speed. Looks like the blocked off front grill is doing the job of creating a low pressure zone in the engine bay.
I can see the left front lifting higher than the right Donnie. Same on the rear as well. You might try turning the spring pressure up some there which will help the launch.
I also saw the tires being blown away. You might consider using some off set bushings in the ears on the axle. It will put the IC closer to where it needs to be which will help your launch.
I also saw the tires being blown away. You might consider using some off set bushings in the ears on the axle. It will put the IC closer to where it needs to be which will help your launch.
The IC is already further forward than most would consider appropriate. Which direction are you suggesting to move it?
