72 bhp i wish!

[Dickyholdsworth]

I believe the BHP limit for Minitwin racing is 72BHP, well i took my curvy to the dyno to make sure everything was running well which it was, the bike has a completely standard engine with a Viper race can, K&N filter, dynojet kit fitted to carbs and the thing shoved out a mighty 63bhp:p
So no danger of me exceeding the bhp limit how about you, what does yours do?

[Alpinestarhero]

120 bhp

cos its a yellow curvy

[sv650racing]

just got back from meeting at brands! and my injected engine running on carbs, with k&n and full hindle system. 68.5BHP

[petevtwin650]

Two different Sv's. One with JHS cams fitted

http://i72.photobucket.com/albums/i184/petevtwin650/org%20posts/aaa3-1.jpg

http://i72.photobucket.com/albums/i184/petevtwin650/org%20posts/aaa2-8.jpg

[yorkie_chris]

What dyno?
Either that's a pessimistic dyno or you have a problem.

Makes me laugh when I see crank bhp on chassic dyno charts, that value tells noone nothing, means nothing and use of it makes you appear stupid.

[petevtwin650]

What's a matter with you these days Chris?

You haven't got a nice thing to say about anything? :confused:

[yorkie_chris]

That wasn't directed at you at all Pete, sorry if it came across that way!
I mean dyno operators giving crank bhp figures which are just arbitrarily increased from whatever was at the wheel.

You should bear in mind that I am generally cynical and almost never serious :)

[petevtwin650]

That wasn't directed at you at all Pete, sorry if it came across that way!
I mean dyno operators giving crank bhp figures which are just arbitrarily increased from whatever was at the wheel.

You should bear in mind that I am generally cynical and almost never serious :)

Aye mate, I'm sure it wasn't. Wouldn't matter if it was, as it's only a forum after all, it's just that you seem to have lost some of that dry humour you had as a lad:p

Perhaps we all need to get out more :D

[yorkie_chris]

People kept getting offended, so I just bring the insults straight out these days. Saves time :-P

[Dickyholdsworth]

I don't think there was anything wrong exactly, the motor ran very well although it was a bit rich at the top end and i will jet down to improve the top end although i don't expect it to produce much in terms of outright power. Here is the sheet you will see it was 61 bhp then we removed the baffle and gained a hoooge 1.6 bhp!

http://i283.photobucket.com/albums/kk295/Dickyholdsworth/SV650%202010/Dynosheet.jpg

[petevtwin650]

Same make of Dyno. Pre cams. Nearly 70bhp. It appears you have some sort of problem

http://i72.photobucket.com/albums/i184/petevtwin650/org%20posts/aaa2-9.jpg



http://i283.photobucket.com/albums/kk295/Dickyholdsworth/SV650%202010/Dynosheet.jpg

[yorkie_chris]

Cool, local guy :)

That looks like it's actually got a rich miss, but I'm no expert, you should get some good gains by leaning it out.


Sorry if I'm teaching grandma to suck eggs, but which air filter? is it clean? What size mains?

[Dickyholdsworth]

No problem all help welcome, filter clean K&n and running 180 main jets

[yorkie_chris]

180 dynojet is too big, 180 mikuni is WAYYY too big

The K+N doesn't flow all that well, 180DJ would be ok with BMC race or something like that.

With K+N I guess you want about 145-150 mikuni jet. Dunno what that is in DJ numbers.

[Dickyholdsworth]

I had some 145 and tried them at Mallory but the thing would not run just popped so too lean, i have some 170's now to try then i will work from there. Is the BMC filter so much better than the K&N?

[yorkie_chris]

145 mikuni?

[fastdruid]

Same make of Dyno. Pre cams. Nearly 70bhp. It appears you have some sort of problem


Same as, my std engine (no internal changes, Suzuki Air filter, std jetting, Akrapovic headers, scorpion silencer) on the same make of dyno was making ~70[1].

Druid

[1] I'd check the exact figure but my web server (where I have the graphs) is off line.

[svjonesy]

got dyno'd at Brands this weekend and was pleased to get 69.1bhp.

Its a curvy with 04 motor running dynojetted carbs, K&N filter and Akro exhaust.

[21QUEST]

180 DJ would be too big even for a BMC race RS filter I'd say.

My old curvy with BMC Race RS filter, JHS Stage II cams and full M4 exhaust was running about 165 DJ mains IIRC. i think that made 80bhp IIRC.

I tend to think in DJ myself.


Cheers
Ben

[yorkie_chris]

I have that setup on mine, same except with tank raisers too. That has 160 mikunis in it. 155s were too small.

I believe northwind has 180DJ with race RS and WRP system?

[Dickyholdsworth]

145 mikuni?


no not Mikuni, changed to 170's now so back to dyno before Brands but it will have to wait as i'm working away for a week now

[lee67]

every bike ive had...and ive had lots( 50+)...that ive tried running k&n's, ran worse..and all were setup, i swear by the oe filter..never had issues running standard filters..

[yorkie_chris]

I try a standard curvy after mine and they feel pretty weak. That's a BMC filter though, I agree the K+N for the SV is pretty crap.

With standard pipework I would put a standard filter and jets in it and save the hassle!

[fastdruid]

Same as, my std engine (no internal changes, Suzuki Air filter, std jetting, Akrapovic headers, scorpion silencer) on the same make of dyno was making ~70[1].


70.62

http://www.fastdruid.co.uk/temp/thumbs/640x480DSC03108.JPG

Druid

[Dickyholdsworth]

Fitted a BMC filter and that did the trick, does anyone know why this filter is better than the K&N on the SV?

[yorkie_chris]

Snorkel bad shape on K+N, also I think filter media is different.