Chuck, so you're saying that FI motor with a closed loop Lamda probe can not
do it???? It really depends on which motor and how much you want to trim
off. I personally think a "stock" motor would be close to the ball park,
just adding weight would ballance it out. The F1000 left the engine rules
wide open, not good...
CR
----- Original Message -----
From: "Chuck Voboril" <[EMAIL PROTECTED]>
To: <[email protected]>
Sent: Tuesday, June 26, 2007 10:36 PM
Subject: [F500] RWHP
Ah Bill,
Caution: restrictors probably should not be planned for motorcycle
powered F600.
F1000 rules makers decided they could not use restrictors because a modern
MC FI motor with stock FI absolutely cannot accommodate a restrictor.
The FI pukes fuel all over. It is an open loop system. It has to work
like that.
That is why FSAE kids play with their laptops so much.
According to widly published magazine tests, those 115 to 120 HP bike
motors have 106 to 108HP to rear wheels on a stock internals Suzuki or
Honda 600cc.
Next year it will be more HP. Very competitive market for those cute
little motors.
Anyway, thats about 9 to 12 HP loss in transmission, chain, and a tiny bit
in the tire. Lets figure on 10 HP average loss.
Now we add lower restriction muffler + aftemarket tubular exhaust.
All that should be worth 2-4 HP. We'll use an added 3 HP
We are then at maybe 109-111 rear wheel HP
What do you think a 95 to 100 HP fully developed properly clutched Rotax
ends up with at the rear wheels?
If we assume that a CVT is just as efficient as a bike drivetrain, then we
subtract 10 HP to get 90 RWHP best case, I believe.
Thats 19 HP less at the rear wheels than using the lower HP Suzuki bike
motor HP for comparison.
Lets knock off another 2 HP on the difference in efficiency since we only
were flexing one tire in the bike dyno tests.
Thats why I asked "what about a Novakar with 17 more RWHP"
Thats the thought process anyway. Caution, your tuning ability may
vary.....
Chuck
From: "Jan Schmidt" <[EMAIL PROTECTED]>
Reply-To: [email protected]
To: [email protected], [EMAIL PROTECTED]
Subject: RE: [F500] Novak wins Sprints, Jondal takes Series lead
Date: Tue, 26 Jun 2007 12:17:20 -0500
I have been meaning to post on this issue for a couple of weeks now, but
have been very busy with my Dad's funeral stuff. I have been keeping
close communication with the local Fsae boys and have some enlightening
info. They are taking a 115 to 120hp Honda motor and strangling it down
with a single inlet restrictor (metric) that is roughly the size of a
nickel. They are claiming 80 to 81 hp on the dyno. They attach a cv
joint jack shaft where the countershaft sprocket would normally mount
and run it straight over to the dyno. Now, they are allowed big
compression, big valves, big cams and allowed to play with FI stuff. I
bet our "no internal mods" engine would be around 75hp to 80 hp. I dont
think that anyone has to worry about our possible future "crotch rocket"
engine being an overkill and screwing up the class. If someone wants to
cross post this to eformula, that is fine. I havent gotten off my butt
and subscribed , yet.
Happy motoring
Bill Schmidt 88 RD Kawi
>>> "Chuck Voboril" <[EMAIL PROTECTED]> 06/26/07 9:48 AM >>>
Should be interesting to see what another 17 HP or so to the ground from
a
bike motor does in a car like Brian's.
Chuck
>From: "Jeff Jorgenson" <[EMAIL PROTECTED]>
>Reply-To: [email protected]
>To: [email protected]
>Subject: [F500] Novak wins Sprints, Jondal takes Series lead
>Date: Mon, 25 Jun 2007 21:23:00 -0700
>
>June 25, 2007
>
> For Immediate Release
>Novak wins Sprints, Jondal takes Series lead
>
>Formula 500 Constructors Series presented by,
>Novakar, QRE, Red Devil, Scorpion, Sidewinder, TR1,
>Dolphin-Motorsports, Jondal Machine, F500.org and Vertical Curve
>Racing
>
>Congratulations to Brian Novak - he won the June Sprints in a
>dominating drive, setting a track record on the way. Steve Jondal
>came out on top of a super duel with Don Hamilton to capture second
>place and the lead of the Formula 500 Constructors Series.
>
>Series Standings:
>
>Name Points Total
>Steve Jondal 13.5
>Jeff Jorgenson 12
>Clint McMahan 12
>Brian Novak 12
>Kenny Holzer 9
>Tom Hastings 9
>Kenny Price 7
>Aaron Ellis 6
>Tom Shaughnessy 5
>Andrew Brenkus 4
>John Walbran 3
>Thomas Bartz 2
>Darrel Greening 1
>Charlie Schlismann 1
>Peter Zak 1
>Don Hamilton 1
>Brian Brothers 1
>Bob Giesen 1
>Michel Vacek 1
>Bob Berman 0
>Cory McLeod 0
>Jim Elder 0
>
>
>See you in Topeka!
________________________________
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