Valve float vs Tranny Failure

Reply Subscribe

Thread Tools

Search this Thread

Dec 17, 2007 | 06:58 PM

blackstang14

Thread Starter

2nd Gear Member

Joined: Oct 2007

Posts: 167

From: New Jersey

Valve float vs Tranny Failure

Looking for F/I soon but I have a question. Which is likely to fail first tranny vs internals and at what power levels. Is it based on RWHP or lbs of boost (i.e. turbo/supercharger)???

Thanks
James

Dec 17, 2007 | 07:21 PM

chrisc

5th Gear Member

Joined: Oct 2005

Posts: 3,696

From: Seattle, WA

RE: Valve float vs Tranny Failure

The auto tranny can do 400rwhp+ and the manual tranny can do something around 370rwhp

Dec 17, 2007 | 08:57 PM

fazm

5th Gear Member

Joined: Mar 2006

Posts: 3,893

From: arizona

RE: Valve float vs Tranny Failure

the trans is actually based on torque, not hp.

ive blown 2 stock transmissions, a built 7.5 rear, and a stock 8.8 rear and my engine is fine....

Dec 17, 2007 | 09:24 PM

blackstang14

Thread Starter

2nd Gear Member

Joined: Oct 2007

Posts: 167

From: New Jersey

RE: Valve float vs Tranny Failure

Thanks guys,
So would you say around 350-370 torque would be the gray area?

Dec 18, 2007 | 10:24 AM

28HopUp

MF Administrator

Joined: May 2005

Posts: 8,193

From: South Carolina

RE: Valve float vs Tranny Failure

Quote:

ORIGINAL: blackstang14

Thanks guys,
So would you say around 350-370 torque would be the gray area?

I'm not sure you should fixate on final HP numbers. When going FI, the amount of boost (and your tune) will determine engine longevity. I remember reading that 11psi was the agreed upon top level of boost to run safely. A turbo at 11psi will generate more HP and torque than a supercharger at 11psi.

Dec 18, 2007 | 12:34 PM

rmays06

5th Gear Member

Joined: May 2006

Posts: 2,578

From: DBN, MI

RE: Valve float vs Tranny Failure

+1 scrmin had stock rear end and a fast car 12.8's with no engine, trans or rearend problems.
Droptop6 had the same set up and floated 2 valves and did his rear end wrong.

Quote:

ORIGINAL: 28HopUp

Quote:

ORIGINAL: blackstang14

Thanks guys,
So would you say around 350-370 torque would be the gray area?

Dec 18, 2007 | 02:03 PM

lrgnation

4th Gear Member

Joined: Apr 2006

Posts: 1,136

From: CA

RE: Valve float vs Tranny Failure

Quote:

ORIGINAL: 28HopUp

Quote:

ORIGINAL: blackstang14

Thanks guys,
So would you say around 350-370 torque would be the gray area?

Depends on the tuning as well, if you run lean for like a few seconds at 11psi on a stock motor there is going to be some engine longevity problems..

Dec 18, 2007 | 04:31 PM

blackstang14

Thread Starter

2nd Gear Member

Joined: Oct 2007

Posts: 167

From: New Jersey

RE: Valve float vs Tranny Failure

I was referring to the Transmission withregards tofinal numbers/torque. I agree that the engine longitivity would be combination of boost and tune. Am I right to assume that our manual transmissions would be more likely to go before our stock motors?