[DeTomaso] Final Drive Gear Question

[B Hower]

Mike,
 
 I think you made a good point here.
 
Bud #3400 ( looking forward to SORC )

--- On Sat, 6/23/12, MikeLDrew at aol.com <MikeLDrew at aol.com> wrote:


From: MikeLDrew at aol.com <MikeLDrew at aol.com>
Subject: Re: [DeTomaso] Final Drive Gear Question
To: michaelsavga at gmail.com, jb841 at cox.net
Cc: detomaso at realbig.com
Date: Saturday, June 23, 2012, 11:20 PM



In a message dated 6/23/12 21 11 41, michaelsavga at gmail.com writes:


> So what is the value of a 3.78 R & P?
> 
>>>Cost?   Or value?


> >In $ to acquire and install one?
> 
>>>Figure about $2500 for the ring and pinion; requires professional 
installation that goes along with a ZF overhaul, so figure at least another $2000 
for that, and probably more.

> >Gas Mileage?
> Top Speed?
> Other Benefit?
> 
>>>Both of those.   The ideal combination might be the stock 4.22 ratio 
with a taller fifth gear, which preserves accleration in the lower gears and 
has the added advantage of being substantially less expensive than a 3.77 R&P. 
  I'm happy with the stock gearing, because cruising on the freeway at 
3000-3500 rpm ensures my engine is 'on the cam'.   People can make the mistake 
of overgearing the car, and running below the torque envelope, where the 
engine is soggy and inefficient.   But if you have a cam that is biased towards 
the bottom end, taller gearing can be more beneficial.

Mike
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