Torque To Turn Specification

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Jan 8, 2012 | 08:59 PM

#16

MeanGene427

Tuned

Joined: Mar 2009

Posts: 360

Likes: 3

From: Napa

My last 427 with race bearing clearances, Milodon gear drive, .007 piston clearance and low-tension rings took 7 ft.lbs. to rotate the shortblock

May 30, 2012 | 05:42 PM

#17

e-tek

Elder User

Joined: Apr 2008

Posts: 648

Likes: 0

From: Saskatoon

Quote:

Originally Posted by puttster

With just the mains on my 390 it took 10 lbs to break it free When I added the pistons it took 75 lbs.
puttster

WOW - that seems like a lot!

I know this thread is a few months old, but goood info as I always check this value. Just putting one together here myself and I got 3-5 lbs just crank and 45lbs with pistons (no cam or chain).

May 30, 2012 | 06:59 PM

#18

krewat

FTE Leadership Emeritus

Joined: Jul 2002

Posts: 42,561

Likes: 421

From: Long Island USA

Just the honing finish will add/subtract quite a bit... especially depending on ring material and tension.

May 30, 2012 | 10:41 PM

#19

puttster

Senior User

Joined: Jan 2012

Posts: 136

Likes: 0

From: Houston

Quote:

Originally Posted by e-tek

WOW - that seems like a lot!

Yeah I was not too comfortable with it. I had a new hone and cast rings and the bearings might have been a thousand too tight. Rear main seemed to add the most drag. Checked what I could, finally just moved on. 800 miles later seems to be doing okay.

puttster