[DeTomaso] Ford 392 rev limit?

[MikeLDrew at aol.com]

Hi guys,

During the dark days when the forum was down, Jeff Cobb posted a query and 
it was rejected, so he asked me to post it for him (below).   There are 
actually two posts--start at the bottom one and work your way up.

Mike

====

From: JEFFREY COBB <zumzum at cox.net>
Subject: Re: 351 rev limit
Date: August 29, 2013 1:54:13 PM CDT
To: "detomaso at poca.com List" <detomaso at poca.com>
Cc: Jeff Cobb <zumzum at cox.net>

Hello again about the rev limit question,
The engine specs are:
Ford Racing 392 Windsor stroked,
360 hp at rear wheels from the dyno sheet
GT40 Heads--9.7:1,
Mighty Demon 750
Ford Racing steel flywheel
Tremac TKO 3550 5 speed and 3.73,

Any help would be appreciated,
Thanks,
Jeff
_________________________________________________________________________
On Aug 29, 2013, at 6:13 AM, Jeff Cobb wrote:


Hello group,





Hope you all can provide info.


A 2000 Superformance Cobra came back in yesterday for some finish up work 
while I was tuning up a 57 Ford Fairlane Skyliner with a Police Interceptor 
392 engine.


Just bought by a faithful customer and he wants me to do what I want to do 
to make it better and faster.





My question to you guys is about the safe rev limit. It has a 351 taken out 
to a stated 392, the largest Demon carb I've ever seen and a MSD 6AL with a 
6100 rpm limit chip.





Problem is that this strong engine will instantly bang off the limiter too 
quickly in the first three gears. Engine is very smooth at high rpm's and 
feels as if it would rocket well past past 6,100 with no problem.





I do not know cam, rear end ratio, compression or any other specs and I 
will try to find out today. Torque peak feels the  strongest about 3,000 to 
4,100 with 6,1000 coming in too soon.





What rpm limiter chip do you all recommend for what I have described?


I have little history with higher rpm ceilings of large FORD engines.


Owner is a 64 year old just math professor hot rodder who drives little and 
want to have fun before his last personal rev limit.


We don't desire to scatter his engine and he might buy and use some of my 
VP 110 leaded race gas which will also help.





Thanks for any input,





Jeff Cobb