RWHP differences with a 12bolt

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Feb 1, 2006 | 11:56 AM

FRDnemesis

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From: Charleston, SC

RWHP differences with a 12bolt

I did a search and didn't find anything, so I'm gonna take a chance and ask.

Has anyone seen or tested the difference in RWHP numbers between a 10 and a 12 bolt? More specifically with a Posi instead of a spool but either way is fine.

Thanks,
Jeff

Feb 1, 2006 | 12:11 PM

bad95killer

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From: Somewhere I Belong

Actually with same ratio (10bolt with 3.42 vs. 12bolt with 3.42) ya might see 5-10 rwhp off .

peace

Last edited by bad95killer; Feb 1, 2006 at 12:16 PM.

Feb 1, 2006 | 03:44 PM

SuperZ

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Im not so sure it would be as high as 10rwhp.I would say 5rwhp on same ratio gear.

Feb 1, 2006 | 08:32 PM

TINKRD

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From: DFW

i didnt lose any HP between my 10bolt and 12bolt, but i did lose ~23ft/lbs of TQ.

I wish I still had the dyno graphs. :think:

Feb 1, 2006 | 09:49 PM

02 Camaro SS

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From: Rockland County, NY

I've heard 10-20rwhp is not uncommon when changing and upping the gear ratio.

Feb 2, 2006 | 07:58 AM

FRDnemesis

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Wow, I would have thought more but then again, thats why I asked.

Thanks guys!!!

Jeff

Feb 2, 2006 | 10:43 PM

ChaseSS

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how does a gear change differ the rwhp? higher gears = more power or opposite

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Feb 3, 2006 | 08:14 AM

jimbob

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From: Woodinville, WA

Quote:

Originally Posted by ChaseSS

how does a gear change differ the rwhp? higher gears = more power or opposite

More Friction=less power....However, there's always a however!....on a Stalled Auto you might see more power on the dyno as a result of less slip in the verter in the higher rpm's (with higher gears).

12 RWHP loss from SAE tuned car with 3.73's in 10 bolt, to 12 bolt Strange with 3.73's, direct before and after. Both me and Ed Wright loose the same with the rear end changes....

Last edited by jimbob; Feb 3, 2006 at 08:22 AM.