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Opinions needed with launch, R5P7 #2091692
06/14/16 11:37 AM
06/14/16 11:37 AM
Joined: May 2012
Posts: 169
Finland, Europe
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Ck[FIN] Offline OP
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Ck[FIN]  Offline OP
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Joined: May 2012
Posts: 169
Finland, Europe
Need some opinions, of course need to go faster. 1.32s 60ft in this video.

31" tires, 6600rpm, 5.13 gears. 2.74 first gear. No torque R5P7.

https://youtu.be/FaodJkViczo


Thanks to Mafo for the video!



Last edited by Ck[FIN]; 06/14/16 12:43 PM.

-1965 Valiant 9.03s 358cu.in R5P7-
Re: Opinions needed with launch, R5P7 [Re: Ck[FIN]] #2091919
06/14/16 05:18 PM
06/14/16 05:18 PM
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Milwaukee WI
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TRENDZ Offline
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Milwaukee WI
Looks like the tire roll out is at 1:1 with track speed. Take some hook out of it. Try to get the tire to spin about 2 revolutions for 1 roll out distance.
A few things I would try...
Tighten shock extension in the rear.
Raise launch rpm.
Do one change at a time and record the results.


"use it 'till it breaks, replace as needed"
Re: Opinions needed with launch, R5P7 [Re: Ck[FIN]] #2091929
06/14/16 05:29 PM
06/14/16 05:29 PM
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Posts: 9,827
MI, usa
dvw Offline
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Rebound and compression on the rear shocks is to loose. Throws the housing out and bounces it back. It's hitting the tire pretty hard so my bet is slowing the the housing down with tighter rebound won't hurt anything. Once the rebound is under control it may not take much more compression to keep the housing/tire down on the track. How much air pressure? Might like more tire psi as well. What does the car weigh?
Doug

Re: Opinions needed with launch, R5P7 [Re: Ck[FIN]] #2092253
06/15/16 07:43 AM
06/15/16 07:43 AM
Joined: May 2012
Posts: 169
Finland, Europe
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Ck[FIN] Offline OP
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Joined: May 2012
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Finland, Europe
Thanks for the tips, i`ll try some shock adjustments first.
I have used 9 or 10psi at tires. car weight is 2788lbs.

Wont be able to raise the rpm anymore, maybe i´ll change my other converter which is looser so i get more rpm out of it.


-1965 Valiant 9.03s 358cu.in R5P7-






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