[Shotimes] Re: 300 hp

[Ron Porter]

Guess I don't see anything "magical" about cams that would get 300 HP out of
it. Mark mentioned it back in an earlier post......at what rpm is that 300
HP at, and what does the torque curve look like? I think it would be
incredibly easy to make cams that would spin the motor to 8,500-9,000 rpm
and pull 300+ HP. If this motor was in a 2,000 # Miata, getting the 300 HP
would be no big deal. In a 3,400 # SHO, plus another 1,000 #s of passengers,
luggage, etc, it would be a pig.

Also remember that HP is not "real", it is merely a calculation of torque
over time. High HP numbers do not make for a strong-running car, especially
on a car like a SHO that does not have options to change tranny or
final-drive gearing.

Ron Porter 

-----Original Message-----
From: shotimes-admin@autox.team.net [mailto:shotimes-admin@autox.team.net]
On Behalf Of Donelson Don
Sent: Wednesday, August 06, 2003 11:04 AM
To: Ron Porter
Cc: shotimes@autox.team.net
Subject: RE: [Shotimes] Re: 300 hp


Caught this thread late. I think too that the 300HP SHO motor was mythical
but this is what i know: 

I knew some of the production people who actually tested this motor before
it went into the Taurus. Claims of 300 hp or closer were reported by Yamaha
and there test facilities. 

Supposedly there were special cams that yamaha developed for this motor to
make the additional HP as well with a few other tweaks. Obviously the A/F
ratio going to the motor and being tuned by Yamaha would allow one to deduct
that they would be able to extract the maxium HP and Tq from this motor.
This motor was detuned for the Taurus and the "magical cams" were locked
away.

My understanding is this motor was designed for Ford to go into a indy car (
which is why the lower end is so stout ). Ford abanonded this idea but was
stuck with the Yamaha motor contract and hence forth the SHO.

I know from my motors esp the first SUPER SHO I owned, that 3.2 motor with
headers stage II cams .. etc .. everything .. duel exhaust was right at 300
HP.

I seriously doubt, looking back, that Yamaha could take a stock 3.0 motor
and make some minor modifications and get 300 HP out of. 

I just dont see it.

But, still would love to get my hands on those cams if in fact they were
real to begin with ! :)
 

--
 
dond
91 Super SHO about to be a plain jane &
transfering all the goodies to my 89 Super SHO III  :)
 
All work & assembly done by yours truly  
 
-3.2 ATX block
-FPS hi-flow heads w/  over sized valves
-Stage I cams
-SHONUT adjustable timing sprockets
-Ported intake & runners
-Ported and extrude honed exhaust manifolds
-Hi-flow catless Y pipe
-Hi-flow exhaust
-BBB
-SHO SHOP T.B.
-SHONUT phenolic spacers
-Quaife
-CAI
-UDP
****
-Cowl hood
-Momo 17x8 rims
-Police grill
-Custom two tone interior
-Complete sunpro gauges
oil temp / water temp / oil pressure
****
-Tokico shocks/Eibach springs
-Polyurethane at all corners 
-Solid-sub frame bushings
-Frame stiffners
-Adjustable rear control arms
-Battery located in trunk for better weight distrubution
****
-12" rotors at all four corners
-Steel braided lines


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