RWTQ question?
Thread Starter
Safety Car
Joined: Aug 2004
Posts: 4,734
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From: Youngstown Ohio
RWTQ question?
What effect does the drivetrain have on RWTQ. I have read that drivetrain loss accounts for about ~15% where RWHP is concerened but how about RWTQ? I have a manual coupe with 3.42's making 540 RWHP and 470 RWTQ. Starting to take a look at clutch options and see that they rate TQ capacity at the engine.
Thanks,
Darion
Thanks,
Darion
Le Mans Master
Joined: May 2006
Posts: 7,867
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From: Hillsboro OR
What effect does the drivetrain have on RWTQ. I have read that drivetrain loss accounts for about ~15% where RWHP is concerened but how about RWTQ? I have a manual coupe with 3.42's making 540 RWHP and 470 RWTQ. Starting to take a look at clutch options and see that they rate TQ capacity at the engine.
Thanks,
Darion
Thanks,
Darion
Thread Starter
Safety Car
Joined: Aug 2004
Posts: 4,734
Likes: 232
From: Youngstown Ohio
Yup I agree, just wondering to what degree. I don't know if there is a percent to apply like we do on the HP end or if its more complex than that. Alot of knowledge on CF and I'm sure an answer will come along.
Thanks for the reply,
Darion
Thanks for the reply,
Darion
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Race Director
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From: South Western Ontario
Torque varies as it goes through any gear ratio so maybe that's why you're thinking it's different for toque then HP. Fotunately, it seems most if not all wheel dyno's reflect the RWTQ back to engine rpm meaning the quoted RWTQ number does represent the engine torque less the the drivetrain losses. So, I would add something like 30% to your number and use that as the minimum torque the clutch should hold. It's probably more like 15% in reality but 30% will be sure to give you a little extra clutch capability.
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Thread Starter
Safety Car
Joined: Aug 2004
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From: Youngstown Ohio
Tech Contributor
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From: Dyer, IN
You do realize, that you can call a number of vendor/shops, and they can tell you EXACTLY what you need.......no math, no guesswork, no opinions....just a solid recommnedation, from people that do it for a living.
Thread Starter
Safety Car
Joined: Aug 2004
Posts: 4,734
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From: Youngstown Ohio
Thanks for the thought and in the end my shop will have a say,
Darion