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Old 06-19-2012, 04:49 AM   #1
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Default How to reduce the punch on my Nova .12 PT

Dear all I have a Novarossi .12 PT with a Capricorn muffler kit EFRA2662 and really wish to tame a bit more the bottom end.
Basically we have a track with lots of Chicanes so can't have the rear all over the place due to much power once I hit the throttle.
I have already tried a higher 1st to reduce the punch and my clutch gap is .30 with med spring but engine still rips the tires.

Any suggestioms

Last edited by speed6; 06-19-2012 at 05:19 AM.
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Old 06-19-2012, 05:33 AM   #2
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Throttle control, the trigger is not a light switch. Also, some exp on the radio can help.

Also, set-up changes to help get the power down can really help the lap times. Forward bite is a must. Try some more rear toe-in, or softer rear springs or less rear bar, etc. etc.
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Old 06-19-2012, 06:17 AM   #3
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Originally Posted by wingracer View Post
Throttle control, the trigger is not a light switch. Also, some exp on the radio can help.

Also, set-up changes to help get the power down can really help the lap times. Forward bite is a must. Try some more rear toe-in, or softer rear springs or less rear bar, etc. etc.
Used EXP and I am quite smooth but still to much power I really wish I could remove some power from the bottom and have it at the top end. Re softer rear I already have some push in certain corner so don't really want to make the rear end softer.
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Old 06-19-2012, 06:47 AM   #4
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Used EXP and I am quite smooth but still to much power I really wish I could remove some power from the bottom and have it at the top end. Re softer rear I already have some push in certain corner so don't really want to make the rear end softer.
use soft centex spring,reduce the free gap or add 0.1mm shim to the the engine also can reduce the punch.
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Old 06-19-2012, 07:38 AM   #5
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use soft centex spring,reduce the free gap or add 0.1mm shim to the the engine also can reduce the punch.
Clutch Gap can't go lower as the clutch starts hitting a bit the bell.

Re head shim will It waste the same amount of fuel?
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Old 06-19-2012, 07:41 AM   #6
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Can I play with a muffler setup maybe use a different model, is there any muffler combo you would recommend.

Thanks
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Old 06-19-2012, 08:49 AM   #7
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Add an extra headshim

Lower the nitro content

use a short manifold

set the LSN a bit richer
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Old 06-20-2012, 01:27 AM   #8
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Quote:
Originally Posted by speed6 View Post
Dear all I have a Novarossi .12 PT with a Capricorn muffler kit EFRA2662 and really wish to tame a bit more the bottom end.
Basically we have a track with lots of Chicanes so can't have the rear all over the place due to much power once I hit the throttle.
I have already tried a higher 1st to reduce the punch and my clutch gap is .30 with med spring but engine still rips the tires.

Any suggestioms
Shorten first gear, then the engine will accelerate faster but your speed will be less. The car will be more stable in the tight sections.
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Old 06-20-2012, 03:34 AM   #9
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Add an extra headshim

Lower the nitro content

use a short manifold

set the LSN a bit richer
Lowering the nitro content might be a good starting point how much 10% nitro?

That will give me more run time i guess aswell?

set the LSN a bit richer doesn't work as you loose throttle response.

Wish to try a shorter manifold but since i am using the Capricorn muffler kit don't know what to go for.
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Old 06-20-2012, 03:35 AM   #10
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Shorten first gear, then the engine will accelerate faster but your speed will be less. The car will be more stable in the tight sections.
Already done that
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Old 06-20-2012, 04:32 AM   #11
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Harder clutch shoe (yellow not red), increase rear toe in, increase front diff oil (try 300k or spool), conical washers for clutch spring--once get hot (4 laps) power feels more linear with conical washers.
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Old 06-20-2012, 09:04 AM   #12
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use a restricter
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Old 06-20-2012, 11:26 AM   #13
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Quote:
Originally Posted by speed6 View Post
Dear all I have a Novarossi .12 PT with a Capricorn muffler kit EFRA2662 and really wish to tame a bit more the bottom end.
Basically we have a track with lots of Chicanes so can't have the rear all over the place due to much power once I hit the throttle.
I have already tried a higher 1st to reduce the punch and my clutch gap is .30 with med spring but engine still rips the tires.

Any suggestioms
I can custom tailor the engines powerband to fit your needs by modification.
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Old 06-20-2012, 01:14 PM   #14
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I can custom tailor the engines powerband to fit your needs by modification.
Thats cool would you be able to lower the punch and get more run time?
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Old 06-22-2012, 12:51 PM   #15
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Edited.
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