Power to the people

tz375 · Post by **tz375** » Mon Nov 16, 2009 4:40 pm

Anyone got any dyno charts for TR or GT750?

I need a starting point for the work I'm doing on a motor and don't have a "before" chart or anything to compare to.

I know that the claimed 67 or 70 HP was more like 58 on a good one at the rear wheel, but not too many charts out there to compare notes.

Thanks

Tom Garcia · Post by **Tom Garcia** » Mon Nov 16, 2009 4:49 pm

I just used Google images and there are a couple right off the bat for the TZ...

http://www.tz350.net/images/dyno_and_mi ... 1.jpg[/url

http://homepage.mac.com/rg500delta/Personal104.html

tz375 · Post by **tz375** » Mon Nov 16, 2009 5:40 pm

Yes, thanks Tom, but I wanted TR or GT charts.

Tom Garcia · Post by **Tom Garcia** » Mon Nov 16, 2009 6:05 pm

Sorry...gotta get new glasses...

ja-moo · Post by **ja-moo** » Mon Nov 16, 2009 9:45 pm

Just divide the TZ by 2.......

Sorry, I couldn't resist.........

tz375 · Post by **tz375** » Mon Nov 16, 2009 11:26 pm

John,

That's not far off. TZ750 makes about 120 /2= 60 , but on a good day a stock GT750 makes more like 48-50.

I was interested to see what some of the dyno charts look like in terms of power spread at lower revs for example as much as to see what HP people made.

rngdng · Post by **rngdng** » Tue Nov 17, 2009 1:19 am

Here's one of Blueboy with stock carbs, pods and Jemcos. No major engine work at that time. Hope it helps.

http://www.3cyl.com/rngdng/Dynorun.pdf

Craig380 · Post by **Craig380** » Tue Nov 17, 2009 3:32 am

Lane,

that's a very nice, linear power curve, and 60+ at the wheel is pretty damn good ....

rngdng · Post by **rngdng** » Tue Nov 17, 2009 6:49 am

Craig380 wrote:Lane,

that's a very nice, linear power curve, and 60+ at the wheel is pretty damn good ....

I don't have the printout from the later run with the lift-plate, and 34s, but it hit 79+ with a similar power curve. A little more pipey, but very manageable.

Lane

tz375 · Post by **tz375** » Tue Nov 17, 2009 8:53 am

Thanks Lane, That's a very smooth curve.

Of course we can't really compare one dyno chart to another, but yours is looking really good.

I found one on the UK site and that bike made 46.8 stock and 53.9 with Allspeeds/Gibsons after jetting. they were happy with the 10% improvement.

Suzukidave had a quick and dirty dyno run on the yellow GTXR with pods and Bassanis and I think it made mid fifties which is about right. I don't think he had a graph though.

It all helps to build a body of knowledge.