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Message started by Serowbot on 05/21/10 at 15:26:17

Title: Dyno...
Post by Serowbot on 05/21/10 at 15:26:17

Gerry just got new rings and a valve grind on his 23k miles Savage...
150main/52.5 pilot w/2/3rd spacer at 2400ft...
k/n filter and Supertrap w/14 baffles...
Here's the dyno sheet... done after 500 mile break-in... ;)...
33.90 hp/ 37.42 torque

http://i600.photobucket.com/albums/tt82/serowbot/dynogerryb.jpg?t=1274480368



Title: Re: Dyno...
Post by bill67 on 05/21/10 at 15:31:31

I wonder why they don't start showing till almost 3500 rpm.

Title: Re: Dyno...
Post by thumperclone on 05/21/10 at 16:12:28


010A0F0F5554630 wrote:
I wonder why they don't start showing till almost 3500 rpm.

the numbers arent worth posting b4 then

Title: Re: Dyno...
Post by Charon on 05/21/10 at 18:05:49

According to an article I read long ago, many engines will not run at wide-open throttle at lower speeds. Could be this one won't accept wide-open throttle lower than 3500 or so.

If this torque curve is accurate, it does show there is no 6500 rpm rev limiter, as the curve goes up to 7000.

Title: Re: Dyno...
Post by Serowbot on 05/21/10 at 18:30:41

no limiter on a Savage....  I'd have surely found it by now.... :-?...

Title: Re: Dyno...
Post by bill67 on 05/21/10 at 19:02:49

My s40 will pull from 30 mph easy in high gear,that I think would be around 2350 rpm.

Title: Re: Dyno...
Post by Charon on 05/21/10 at 19:53:44

The standard S40 has a CV carburetor. On a CV carburetor the throttle handle and the butterfly may be wide open, but the true throttle - the slide - isn't wide open until the engine inhales enough air to open it. If the true throttle isn't wide open, it limits engine air and fuel flow, and thus torque and power.

Title: Re: Dyno...
Post by LANCER on 05/22/10 at 07:45:37

VERY NICE NUMBERS AND A GOOD TUNING JOB.
COMING FROM A DYNO THOSE ARE "REAR WHEEL" HP AND TORQUE VALUES.
THAT IS ALMOST IDENTICAL TO WHAT DIAMOND JIM GOT ON THE "BLACK SHADOW" WHEN HE DYNO'D IT AFTER THE EXHAUST MODS AND CARB JET/TUNE.

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