Ron are you running 25 Lbs of boost ??
I would think you'd get more that 305 Hp @ 25 lbs boost
"latest technology such as 16 valve , 2 cams, "
These help a lot to get air into the emgine if you don't have a turbo ,
With a turbo you are force feeding the engine .. The turbo has more effect
of filling the clyinders with air than a few extra valves and a cam.
The main advantge with more valves and cams is you can rev higher with out
valve float, High RPMs 8000+ is not needed or a good choice in a street
engine.. What you have to look at is the total valve area and the total
port area of your Fj20 Vs the U20.. HP on turbo is related to Boost
,,14.7 lbs one atmosphere doubles the air flow thought the motor add enough
gas you get twice the HP,
Mike Kerr
Restoration Products
3730 todrob Ln.
Placerville, CA 95667
Ph# 530-644-6777
Fax# 530-644-6777
E-mail mikekerr@innercite.com
Web; innercite.com/~wolfgang
-----Original Message-----
From: Ron Hamilton <ej99176@goodnet.com>
To: Mark van der Hoek <captainhoek@postmark.net>
Cc: Dan Neuman <dneuman@stars.sfsu.edu>; datsun-roadsters@autox.team.net
<datsun-roadsters@autox.team.net>
Date: Tuesday, May 09, 2000 4:36 PM
Subject: Re: How strong is the U-20??
>Hard to believe as my turbo FJ20 with latest technology such as 16 valve ,
2 cams, built to handle 25 lbs boost, inter cooled, equal length header with
mitsubishi 16g turbo, racing waste gate and
>injected puts out about 305
>
>Ron
>RCKTSHP
>
>Mark van der Hoek wrote:
>
>> Dan Neuman wrote:
>> >
>> > Hello All,
>> > I have a book on metal working and it shows a header for a bob
>> > sharp racing datsun that put out like 375 HP. It was a four cylinder
header
>> > I think.. maybe a roadster maybe not?? But this got me wondering...
Just how
>> > overdesigned are the U-20?? Or are they?? Coudl they take the stress
of a
>> > medium-low boost (~7-10psi) turbo-supercharger with out blowing itself
to
>> > bits??? I know that some Japenese motorcycle engiens can handle twice
>> > the factory horsepower.. What about are cars??
>>
>> A few days ago I asked if anyone knew about a racing firm in Washington
that built stuff for Roadsters. THey had a U-20 turbo kit for which they
claimed 365 horses. I don't remember the boost specs.
>>
>> --
>> Mark van der Hoek
>> Salt Lake City
>>
>> "The national budget must be balanced. The public debt
>> must be reduced; the arrogance of the authorities must
>> be moderated and controlled. Payments to foreign
>> governments must be reduced, if the nation doesn't
>> want to go bankrupt. People must again learn to work,
>> instead of living on public assistance."
>>
>> Marcus Tullius Cicero, 55 B.C.
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