TURBO RING & PINION IN 915 BOX?
05-26-2005, 09:31 AM
#1
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TURBO RING & PINION IN 915 BOX?
I am currently running a 8:31 final drive ratio in my 73 RSR Replica. More details on this track car could be found here - http://www.almost.co.za/ .
Gear ratios are too long for track use. I have found that the 8:41 Ring and Pinion ratio from the Turbo gearbox would work perfectly. I have looked at the 7:31 but it does not suit me so I am looking for alternatives in place of changing gear sets.
My question is: Can the 8:41 Turbo Ring &Pinion be fitted to a 915 box?
Gear ratios are too long for track use. I have found that the 8:41 Ring and Pinion ratio from the Turbo gearbox would work perfectly. I have looked at the 7:31 but it does not suit me so I am looking for alternatives in place of changing gear sets.
My question is: Can the 8:41 Turbo Ring &Pinion be fitted to a 915 box?
05-26-2005, 12:03 PM
#2
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Flat top - Unfortunately, the only way to really do things right in this area is to re-gear. Having closer ratios is a huge benefit for an RSR-type motor (assuming that you don't have a 3.6 transplant or something). Changing the R&P won't help with the rev drops on upshift which is what really makes best advantage of the peaky and high-revving 73 motors...
05-26-2005, 01:03 PM
#3
RL Technical Advisor
Originally Posted by Flat Top
My question is: Can the 8:41 Turbo Ring &Pinion be fitted to a 915 box?
As Grant so wisely said; regear what you currently have as there are a LOT of choices. The real objective in this to reduce the RPM drop at each gearchange and thats the correct & most effective way to improve your car's performance.
Last edited by Steve Weiner-Rennsport Systems; 05-27-2005 at 03:42 AM.
05-27-2005, 02:23 AM
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Thanks Guys.
An half an hour after I posted this thread I spoke my 'Engine' man who, generally, has quite a serious disposition. When I asked if it were possible he burst out laughing as if it were the best joke ever. "No, he said. It is completely different gearbox".
I shall be following your wise advise and re-gear. What is so enjoyable about our car is that with every change we make we have reaped huge rewards in lap time reduction.
An half an hour after I posted this thread I spoke my 'Engine' man who, generally, has quite a serious disposition. When I asked if it were possible he burst out laughing as if it were the best joke ever. "No, he said. It is completely different gearbox".
I shall be following your wise advise and re-gear. What is so enjoyable about our car is that with every change we make we have reaped huge rewards in lap time reduction.
