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Re: Unser Ride Re: Of rears and horsepower and speeds

To: Richard Kensicki <richk@sparta-junction.com>
Subject: Re: Unser Ride Re: Of rears and horsepower and speeds
From: DOUG ODOM <popms@thegrid.net>
Date: Fri, 04 Jan 1980 20:46:31 -0800
If I remember right, it was a 302 ford trans-am motor leased from
Roush. I heard it made 620hp on the dyno. I also heard the cost of the
lease was about 20K. Roush did send a motor man with it to take care of
the tune up.
                        Doug Odom

Richard Kensicki wrote:
> 
> Tom
>     Can you tell me anything about the Ron Benham car? I'm interested in what
> motor he was running, can't always presume chevy.
> 
> Rich
> 
> Thomas E. Bryant wrote:
> 
> > Richard,
> > Yes, the Bobby Unser of Indy fame is the one. He was driving the
> > roadster formerly owned and built by Ron Benham. It was purchased and
> > prepared by the Leasing Company that Ron Hope is connected with for the
> > express purpose of getting Bobby into the 200MPH Club. This is the same
> > company that ran the same car, while Ron Benham still had it, pulling a
> > U-Haul Trailer.
> >
> > So far as the gear discussion goes, I don't know of any hard facts and
> > figures on HP loss through these various units. We run a Halibrand
> > Championship unit with a 4.11 ring & Pinion in our car. I have always
> > run the quick change rear axles for the convenience. I'm sure that I pay
> > a price for this, if I was to build another car it most likely would not
> > have a quick change, we don't really change the gear that often anyway
> > except changing back and forth from Bonneville and the Lakes.
> >
> > Richard Kensicki wrote:
> > >
> > > The land-speed mail is getting exhausting so I've got some new questions
> > >
> > > 1. How much HP is lost through the rear end? An article about a
> > > competition coupe (early 90's) used a 7.5 rear gear because it took 10
> > > less HP  to turn it (compared to a 9) and the salt is too slick to hook
> > > up the rear and overload it. I would think a 9 inch rear would be needed
> > > to run the paving at Maxton.
> > >
> > > 2. Noticed that no one seems to use a quick change rear (what I've seen
> > > at least), is it the cost or drive train loss?
> > >
> > > 3. Anyone want to estimate how much HP would be needed push a D/GMR to
> > > 225? I see that the record is from 93 at 223 by B. Unser. Is that the B.
> > > I think it is? This record is very close to C/GMR of 225. Was this just
> > > a hot setup that worked and made the record difficult to break?
> > >
> > > 4. I'm waiting on a rule book but wanted to know if going to fuel or
> > > blower bumps you up a class without a cubic inch change? Thought I read
> > > that somewhere but can't verify it.
> > >
> > > Rich

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