Its all a matter of boost pressure ...boost equals HP, You have to rebiuld
the motor for a turbo if you want to get HP out of it, mine is not a stock
motor. Indy car are getting 1000 HP on the dyno out of only 2400 cc . I
don;t know if your buddie Joe has ever worked with turbos but if he told you
you could only get 250 HP out of 2000cc he needs to do some more
reaserch......
I have a old race U20 in another roadster that puts out 220HP on the dyno
(sorry joe) and it will top out at 145 mph . the turbo will blast up to 145
and accrate from there . at 145 it is only pushing 5 lbs or so to maintain
that speed so it is putting out at least 220 HP then add another 13 lbs
of boost , I think you will get more than 30 HP form 13 lbs of boost :-)
Talk is cheap I have had a lot of so called "experts" say a lot over the
years, I remember a freind of mine that called one of my competiters and
mentioned that the turbo would out accelerate a1100 cc motercycle from a
rolling start... MY competiter told my freind this " Mike Kerr is
bullshittiny you" My friend replied " well the problem with your statment
is this..... I was setting in the pasanger's seat when he blew by the
motorcycle :-)
Mike Kerr
Roadster Restoration
3730 Todrob LN.
Placerville CA. 95667
Ph.# 530-644-6777
Fax# 530-644-7252
E-mail: mikekerr@innercite.com
Web page : http://www.innercite.com/~wolfgang
Visa & master card
-----Original Message-----
From: Mike Poorboy <bitterrootprop@nidlink.com>
To: Ron Hamilton <ej99176@goodnet.com>; datsun-roadsters@autox.team.net
<datsun-roadsters@autox.team.net>
Date: Wednesday, December 15, 1999 7:19 PM
Subject: Re: High velocity
>Ron,
>Joe Klokkevold said the same thing yesterday before Mike even
>replied with his 350 horsepower U20. Joe has alot of experience
>with Datsun/Nissan engines. He said about the same thing you did.
>although he even stated that the FJ20 is not a match for the SR20.
>He felt that the cam timing chain was a weak link along with the
>cast iron block casting. He felt that the U20 was good for around
>250 horsepower. Normally aspirated ones around 210 with 13 to 1
>pistons.
>
>I tend to believe what he says. The U20 designers never intended
>it to be a turbocharged power plant.
>
>This is my opinion based on information I have received from various
>other Datsun / Nissan owners.
>
>I am not saying Mike's car doesn't produce a fair amount of power,
>but I don't think it is 350. Didn't the VG30ETT only produce 320
>horsepower.
>
>Maybe now I will seriously consider an SR20 :-}
>
>Mike
>Ron Hamilton wrote:
>
>> Mike;
>>
>> Is this the U-20 turbo of yours that had the cobbled up single SU carb
with a
>> welded together float bowl because it kept running out of gas? I have
trouble
>> comparing the single overhead can two valve per cylinder, mile long cam
chain,
>> old distributor technology that gets 350? horsepower with the FJ-20 that
starts
>> out with 4 valves per,computerized ignition, fuel injected, dual overhead
cams,
>> designed for charging to 25 lbs,175 horse stock motor that with custom
equal
>> length exhaust header and new Mitsubishi 16G turbo with 9.5 lbs boost and
the
>> numbers only come to approximately 305 horsepower. My math must be wrong!
Must
>> be the fact that the FJ tachs to 8500 rpm +or is it the 3 inch throttle
body
>> that isn't as good as the old welded up carb?
>> :-)
>>
>> Ron
>>
>> Mike Kerr wrote:
>>
>> > <I'm curious as to how many of you are relying on speedometer readings
and
>> > how many are actually calculating speed? Also, are you using a U20 or
>> > something else, and how did the car feel at top speed, handling
>> > wise...fairly secure or downright scary? Mine felt rather twitchy, >
>> >
>> > U20 motor but the turbo does and some extra HP over twice as much
>> > at 150 mph on the gauge (stock rear end 3:70 with stock dia tires)
>> > was pushing 7 lbs. boost to keep it at 150, the waste gate was set for
15
>> > lbs. but the turbo would push it to 17 to 18 lbs.., needed larger waste
>> > gate. the u20 breaths so well it gains hp with boost quite well.
>> > At 120 you could change lanes on a dime, at 150 i wasn't trying to do
>> > anything but go strait on the road. but it was not twitchy at all. I
have
>> > the front dropped 2 inches and 66 rear springs this keeps the air on
top of
>> > the hood pushing the front end down. I have driven some roadsters I
>> > wouldn't have wanted to go 80 mph in also.
>> >
>> > Mike Kerr
>> > Roadster Restoration
>> > 3730 Todrob LN.
>> > Placerville CA. 95667
>> > Ph.# 530-644-6777
>> > Fax# 530-644-7252
>> > E-mail: mikekerr@innercite.com
>> > Web page : http://www.innercite.com/~wolfgang
>> > Visa & master card
>> > -----Original Message-----
>> > From: Rob Robinson <FastrTime@t-three.com>
>> > To: datsun-roadsters@autox.team.net <datsun-roadsters@autox.team.net>
>> > Date: Tuesday, December 14, 1999 6:24 AM
>> > Subject: High velocity
>> >
>> > >I went for a speed run last Saturday just to see what my 2000 would
do...I
>> > >hadn't tried a top speed run since prepping the car for CSP several
years
>> > >ago and with all this talk of speed records...I just couldn't stand
it!
>> > >Anyhow, I ran out of steam at 6350rpm in 5th, 3.89's, and 205/50/15.
Works
>> > >out to about 133mph although the speedo (Autometer) said 142. The car
>> > >probably would have gone faster with 3.70's or larger diameter tires,
as
>> > >6350rpm is a bit past peak hp. BTW, the 6350rpm figure is not a guess,
it
>> > >was plucked from my fuel computer.
>> > >
>> > >I'm curious as to how many of you are relying on speedometer readings
and
>> > >how many are actually calculating speed? Also, are you using a U20 or
>> > >something else, and how did the car feel at top speed, handling
>> > >wise...fairly secure or downright scary? Mine felt rather twitchy, but
>> > >that's expected of a car set up for under 60mph autocrossing. I don't
think
>> > >I would have even attempted such a speed run with stock
suspension/tires.
>> > >
>> > >Non-Roadster content: Anyone got an impressive personal top speed in a
>> > >non-roadster? I used to own a '70 240Z with a 13B rotary
>> > turbo...intercooler
>> > >filled the entire nose, header wrapped to the front of the engine
where
>> > >there was room for the turbo, 3.54 viscous LSD (from a Q45) and
225/50/16.
>> > I
>> > >hit the rev limiter in 4th (8500rpm) and got scared. That calculated
to
>> > >about 185mph, and it could have gone faster...with someone else
driving it.
>> > >
>> > >
>> > >Rob Robinson
>> > >CSP 67 2000 (not Solexes...45mm throttle bodies)
>> > >Roanoke, VA
>> > >
>> > >
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