Anybody built a 637cc F2?
#42
11-30-2011 | 03:20 AM
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Joined: Aug 2010
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From: SE England
sorry, that's 93hp SAE at the wheel.
It's got UK spec cams, it did have CA spec cams before. The Dyno does read very low (Dynapro), as I said a standard bike (newly rebuilt) with a full system and race filter would make about 90 SAE hp on this dyno.
I do have some supersport cams, but dont want to loose my midrange at the moment.
It's got UK spec cams, it did have CA spec cams before. The Dyno does read very low (Dynapro), as I said a standard bike (newly rebuilt) with a full system and race filter would make about 90 SAE hp on this dyno.
I do have some supersport cams, but dont want to loose my midrange at the moment.
#45
11-30-2011 | 07:12 PM
#46
12-01-2011 | 12:10 PM
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Joined: Aug 2010
Posts: 43
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From: SE England
nope, it's a low reading dyno. They are very good, but give lower results than most.
Dyna Pro Dynamometers Ltd
Dyna Pro Dynamometers Ltd
#48
12-03-2011 | 03:20 AM
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Joined: Aug 2010
Posts: 43
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From: SE England
I'm not offended, and now I re-read my reply, it's pretty blunt, sorry for that, I replied from my phone. These dyno's read very low compared to say dynojet or fuchs. On one of those I'd be making around 105hp. The Dyno guy didnt do the tuning so he has no reason to fudge the numbers (or my mind)
I'm back at the Dyno on Wednesday and it'll be much colder this time so we'll see, if i can i'll scan the printout and upload it. I don't really want much more than 95hp, because I'll need to start adding lead to the bike to make it heavier.
I'm back at the Dyno on Wednesday and it'll be much colder this time so we'll see, if i can i'll scan the printout and upload it. I don't really want much more than 95hp, because I'll need to start adding lead to the bike to make it heavier.
Last edited by pmb5; 12-03-2011 at 03:25 AM.
#50
02-01-2012 | 01:04 AM
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Joined: Mar 2007
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I rebuilt an F2 with a 637cc kit, F3 carb/pump and ram air conversion, i blogged it too:
CBR 600 F2 Thunderbike
some of the older pic links are broken (like the 5.5 rear wheel conversion), if there is enough interest i'll fix them
CBR 600 F2 Thunderbike
some of the older pic links are broken (like the 5.5 rear wheel conversion), if there is enough interest i'll fix them
Somewhere on the FireBlade site they talked about +2mm(637cc), the guy that did it said it was alot of work, alot of money, and not very much power increase. Of course if you did the cams, head, lightened crank, to compliment the displacement increasement it would probly be a healthy increase in power. And a major increased $$$$$$$$$$. Also they mentioned something about cbr 900 pistons in the f2 engine for around almost 700cc's. With no overheating issues. Had to press out the sleeves bore is for bigger sleeves etc. Sounds like alot of money, work, etc when a newer 600 would be more reasonable and reliable. But an old f2 built to the max would be awesome.lol