need a little more tire hit

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08-11-2009, 04:57 PM

#11

zipper06

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Quote:

Originally Posted by hammertime

Quote:

Originally Posted by zipper06

You can get more hit by raising the top bar a hole, i was on the bumper because the CG was off so bad on my 4 link. Haven't been out since the change (dropped it 2 holes) and scaled the car, put 30lbs right side, but maybe i'll find out friday nite T&T if it don't rain, been rained out for 1 1/2 month, we only race and T&T every 2 weeks.

Zip.

Zip, I wonder if this is the difference in the door car vs dragster, but we've lowered the top bar *front* holes to get more hit, shorter IC. Must be it is different with a door car, was thinking this would go the same for all 4 links as they are the same concept. Just wondering here thanks for the info

I don't know David, but when layed out with a chalkline the CG (old setting) CG was right behind the front tire (car on the scales) 1450lbs on the rear 1766lbs on the front. Dropped the top bar 2 holes to get closer to the CG and set the preload to 30lbs right side. As i said i have not run the car since the changes were made, but before the changes it would pop the frontend 4 to 5' then fall right back down (no torque with the 377") it would normally 60' in the mid to high 1.40's, total weight 3216lbs.

Zip.

08-15-2009, 09:54 PM

#12

kw89425

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ok guys the new tires didnt do it. my 60' times were 1.377 to 1.45

08-16-2009, 04:26 AM

#13

itsabird

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have you got any video?

08-16-2009, 05:35 AM

#14

kw89425

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08-16-2009, 06:08 AM

#15

fla1976

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More bite

What is your tire pressure in the slicks? Some video would be a great help. Stripe the rears and get some video of the car leaving as viewed from the side. Have you tried stepping up the launch RPM? Are you shocks bottoming out?

08-16-2009, 07:09 AM

#16

kw89425

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i went from 6 to 7 pounds 1/4 1/2 3/4 didnt seem to change much i dont have a video camara i tried leaving at 4200 early in the season but seemed the 60' was better at 3800. i dont think its bottoming out. it had about a 100 150 more hp than my motor plus it was aluminium headed and mine is steel headed so more hp and a little less wieght. i think im going to do what zip said and raise the top bars a hole and see what it does