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Discussion Starter #1
(continuing thread from EZ Board thread)

Thnks for the reply todd.....

as far as the HP issue, you have to remember that Factory's dyno's measure True wheel HP, not crankshaft horsepower. Kawasaki's own stats list a 2000 ZR-7 to have 69 HP. on thier dyno the bike measured 61HP before the kit and stock exhaust. Now it is showing 71 with kit/K&N/stock exhaust. They are now testing with muzzy and a coupke of others to see how the kit works.....

I should have the dyno specs pretty soon I will post them.

Just cant wait, hopefully this week! :>)

Desert!
 

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RWHP

Yeah, I know that the figures are rear wheel. The 75HP for the GPz is rear wheel too. However, the Factory Eddy-current dyno measures the power differently than the Dynojet. Usually DJ has higher numbers. However, the eddy-current dyno, and the method of collecting the data on it is generally more accurate. So mebbe this means that the modded ZR is actually equal to the GPz. I still do not know if the GPz cams and head are different from the ZR. Inquireing minds would like to know. Since Muzzy won the superbike championship with Wayne Rainey and a GPz 750, mebbe he could tell us.;)
 

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On the Factory Pro website, it now says that the Ti jet kit is availiable as a special order. Anybody shell out for it yet. If not, I think Ill be the guinea pig.
 

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GPZ vs ZR7

Hi guys,

I see that you have started the quest for more power! ;)
The differnent types of dyno can give very big differences. I know that from my studies when I was using eddy current and hydraulic brake dynos.
In any case the manufacturer always gives the power on the cranck which is obviously the greatest.
The Dynojet includes losses from gearbox, transmission (chain or dif), and tire to road friction(almost).
Desert, Kawasaki gives 76 for all the ZR7s, naked or S.
Actually they didn't mention that the S has a more restrictive exhaust, this is why the different bike tests gave around 69-70HP for the naked and around 66 for the S!
Also the 1983 GPZ 750 had 84.9 h.p. @ 9,500 rpm!!! (Kawasaki figure)
Todd, Muzzy told me that the GPZ had different cams (more durations and lift) as well as 34mm carbs ;)
He also told me that we can switch cams easily! Since the cams have to come out for valve adjustment, it's a swap! (I will verify if the cam can be swaped as soon as possible).

Aris
 

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Discussion Starter #5
OK, I got the dyno results back..

They faxed it to me, so it wouldnt show up good on the scanner but here are the numbers broken down.....

Factory Pro Tuning
EC977a Eddy current Dynometer
all stock except prototype carb. (NO K&N air Filter installed)

RPM MPH HP ftLbs
WARM UP
19 25 10 26.5
29 37 17.5 30.9
40 50 27.4 36
50 63.2 38.3 38.1
60 75.9 45.3 39.6
70 88.4 63.8 40.2
EGA Phase
20.12 25.4 8.2 21.5
30 37.9 16.5 28.9
39 50.4 27.3 25.9
50 63.2 36.0 37.8
59 75.5 45 39.5
70 88.5 53.5 43.1
80 101.1 61 40.1
89.9 113.5 64.8 37.9
100.6 126.4 66.4 34.8
TAG Phase
19.2 24.3 8.2 22.3
28 37.7 16.6 29.2
39 50.3 27.2 35.9
49.3 62.4 36 38.3
59.9 75.7 45.1 39.5
69.7 88.1 63.6 40
80 101.2 61.5 40.4
90 113.7 64.7 37.7

If I could draw the graph, it is very interesting, All stock the ZR peaks tourqe at around 5500 RPM then levels off. HP levels around 8500. With the carb kit, Tourqe dose not level off till around 8000, HP curse the same but at higher numbers.

As i get more info, i'll post it!

:>) Desert!
 

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Re: GPZ vs ZR7

ariszr7 said:
Hi guys,

...
Desert, Kawasaki gives 76 for all the ZR7s, naked or S.
Actually they didn't mention that the S has a more restrictive exhaust, this is why the different bike tests gave around 69-70HP for the naked and around 66 for the S! ...

Aris
Actually, one of the changes for the 2001 model was a new, quiter exhaust. I strongly suspect it is not limited to the S model, but applies to all models. The only things listed specifically to the S model were the fairing and the new gauges. In the US, of course, the only model avaialble in 2001 was ther S.

I believe most of the above reports on the naked were for the 2000 (or even 1999) models.
 

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Discussion Starter #7
Ok, the latest and Greatest........

It is almost ready guys. They have been working with the after market exhaust with the kit to get it tuned in right. they had a little problem with throttle response, and designed new springs for the kit. they are doing the final phases of testing now. Again, i know it seems like a long time coming but Raul has been putting in a lot of time up there on the bike. I think it will be a very good quality product once it is finished. I also talked to them about getting dyno chat for the association, and Mark said once they are finished they will probably post the charts on the website.

Again once it get it back I will let everyone know how it is, and for martin, was great meeting ya (of all places in the medical parking lot, heh heh) will let you be the first one other than me to take her for a spin)

and guys if you do stop by factory's website, be nice and drop a freindly "Thanks" for all the trouble they have gone through. yes i know they are a business, and this is how they make a living, but for a lot of magazines and companies who have overlooked our beloved ZR, i think it is pretty cool that they have taken the time to do the research to get the fullest out of our bike, especially when they could be spending that time on more expensive racing bikes.

Rubber Down!
Desert!
 
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