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Author: Subject: Bike Engine V Car?
zxrlocost

posted on 7/6/06 at 02:55 PM Reply With Quote
so you reccomend TTS mate I think i might book in by the sounds of it

what kind of price did you pay

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birt

posted on 8/6/06 at 06:20 AM Reply With Quote
Yeah, I couldn't recomend them high enough, nice guys too, obviously very enthusisastic about what they do and let you get right in amongst it if you want. I think the Dyno time is £50 per hour then you need to pay for the jetting kit. There are definately cheeper ways of doing it but after spending thousands building a car I think it worth spending an extra few hundred quid to know that it is set up as best it possibly can be.

If you do go, ask them to show you their 500BHP supercharged Busa drag bike. When I was there they were replacing the engien mounts because the reaction of the huge engine torque on the mounts had cheesed them completely.

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Paul G

posted on 8/6/06 at 08:22 AM Reply With Quote
Chris - I spoke to these guys yesterday - http://smartfxmidlands.com/ they are only down the road from me and have a bike engine specialist there. My mate who fitted my jets worked with him at D&K motorcycles and says he's an absolute genius engine tuner. He said he can fit a dynojet kit and get it running 99% perfect without a rolling road, but if needed they have access to a rolling road in Dudley.

Maybe worth a look, I'm going to pop down to them soon to setup my suspension properly, corner weights etc.

Good luck with the SVA tomorrow

[Edited on 8/6/06 by Paul G]

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zxrlocost

posted on 8/6/06 at 08:43 AM Reply With Quote
cheers mate

hope they set it up good

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wildchild

posted on 13/6/06 at 09:42 AM Reply With Quote
Calm down....


quote:
Originally posted by birt
Wildchild,

Are you suggesting that removing the air box, fitting a free flowing exhaust and re-mapping the fuel will do no more than bring the power back up to what it was before you removed the airbox. If you are then you are very wrong.


no, i said it would take it up a bit. but not 25bhp


quote:
Originally posted by birt
The current Brittish Superbikes have about 215BHP at the rear wheel (so over 230BHP at the crank) and they are not actually allowed do very much to them.



no? only £50k plus of tuning. they must be getting fleeced then if all they are getting is an exhaust and a remap.



quote:
Originally posted by birt
The best MotoGP bikes have about 240BHP at the rear wheel. Maybe 200BHP is a bit ambitious but not as stupid as you seem to be suggesting.


I suggested that 200bhp with just a filter/exhaust/map change was erm, optimistic to say the least.

quote:
Originally posted by birt
You are right, I am talking about BHP at the crank, this is the only way of comparing like with like. What use is comparing the rear wheel horse power of a motorbike with that of a Ford Focus for example?



Rear wheel bhp of a Focus = 0.

Joking aside, I know all this.



quote:
Originally posted by birt
A standard ZX9R is 142 BHP at the crank. I removed the airbox, removed the emissions system, changed the exhaust and took it to TTS and it had only 88BHP (way too much air going through the engine for the standard jets so running very lean). After 3 hours of Dyno time I had 161BHP at the crank which is about a 13% increase in power. If the same applies to a 175BHP engine then that would be about 198BHP so maybe not so ridiculous?


Firstly, congratulations, you seem to have done quite well there. However I don't think you can apply any sort of percentage argument - particularly talking about new vs old engines. Even accounting for all the emissions/noise considerations, the newer engine will be more highly tuned, so the potential returns will be lower. Not to start going into the fact the modern engine will be fuel injected, so chances are it will only be 'restricted' for noise/emissions at certain parts of the rev range and will be at 'full power' at the top end.

Don't get me wrong. I know you can get 200bhp+ out of a litre engine (I'm not stupid, I'm an engineer, a biker, and a follower of bike racing). However you would be extremely lucky to do that with three hours on the dyno, and the result would probably last 5 minutes in a car.

All this is fairly irrelevant anyway. The point ought to be that the standard power and weight of a bike engine will produce a hella fast car - so dont use a car engine!





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G.Man

posted on 13/6/06 at 04:41 PM Reply With Quote
We got 180bhp at the rear wheel on a gsxr 1000 with a few kit parts, a gas flow and a decent race system and can...







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wildchild

posted on 14/6/06 at 12:13 PM Reply With Quote
I don't find that at all surprising.





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cossey
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posted on 14/6/06 at 06:04 PM Reply With Quote
and that is around 200 at the crank, what were the kit parts (if its high comp pistons and cams thats cheating)
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ASH3

posted on 15/6/06 at 10:44 PM Reply With Quote
Were we goin wit this... only so much power available but it comes down to wats sensible n safe gonna get to were it gets silly. My Blade is totally sensible in the right hands dont spoil it!






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G.Man

posted on 16/6/06 at 03:30 AM Reply With Quote
quote:
Originally posted by cossey
and that is around 200 at the crank, what were the kit parts (if its high comp pistons and cams thats cheating)


Cams yes... Pistons no... they were stock...

Airbox, Ecu with raised rev limit... radiator...







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