more out of a sv?

[k1ngy SV]

went on santa pod website as im planning on going down with aloud of the car fans in my area,

seen on a section what groups.

Super Twin Top Fuel - This hugely popular category is also an "anything goes" class, with the sole restriction being that the machine has a maximum of two cylinders. That means nitromethane, fuel injection and supercharging are in, as are thundering, awe-inspiring high six second 200mph performances.
Some of the Harley-based V twins are approaching 3 litres and they all have that infamous deafening bellow! They draw big fields to fight for the eight bike eliminations and even bigger crowds devoted to Harleys, nitro and great Drag Bike racing.

This really stood out from the text*
*awe-inspiring high six second 200mph performances.*
how come they can achieve that? and we cant achieve any more then 70bhp from are point's? surely we can change the crank or something? and im sure i read about hybusa pistons in the sv.. :smt071

idea's? (sorry if im talking nonsense, abit tired ) :rolleyes:

[rictus01]

basically the harley lump has been around so long, you can buy "off the shelf" everything for performance, so only the cases are used, they don't make that much for the SV, you could get massive power starting from an SV engine, but you'd have to get so much made "one off" it would be way more cost wise than simply fitting something more powerful to begin with.

[squirrel_hunter]

you could get massive power starting from an SV engine, but you'd have to get so much made "one off" it would be way more cost wise than simply fitting something more powerful to begin with.

And where would the fun in that be?

[Spank86]

You COULD get those performances out of the SV, if you bored the lump out, ran it on nitromethane and super/turbo charged it.

I'll lend your nearest and and dearest a snow shovel to carry your remains to hospital with. :D

[k1ngy SV]

Yeah but everything costs money..Could be a worthwhile investment ?. Couldn't something be done which is a simple enough job.. Think how many sv's there are.. Forget about the 6sec 200mph that was a example what could be done from a 2 cylinder engine,

People lack creativity ^_^ show me up guys!! Haha

[jambo]

I think the phrase that's generally rolled out about now is "To get to there, I wouldn't start from here"

The only restriction is 2 cylinders.
The Harley motors listed start their stock life at about 1600cc, almost no parts from the standard bike will be used in these open class efforts. If I was building a "fastest possible 2 cylinder bike" I wouldn't start with a sub-80HP motor, it's clear you'll be having to massively up-rate or replace everything.

A properly tuned SV650 motor might make 100HP (aparently some have, though how long lived they were and what money was spent is unclear).

A completely bog standard SV1000, with no money spent at all, which will run all day long will make over that.

If you want to see what people do when they want to pursue outright power on the road have a look at

http://www.tts-performance.co.uk/index.html
http://www.bigccracing.com/

Jambo

If you want to get motivated, Sam on TL Planet made something pretty special with a super charger:
http://www.tlplanet.com/forums/showthread.php?t=80548

[sniff]

I think the phrase that's generally rolled out about now is "To get to there, I wouldn't start from here"

A properly tuned SV650 motor might make 100HP (aparently some have, though how long lived they were and what money was spent is unclear).


From what I remember supertwins hit 97 without stressing it too much and get rebuilt every 2-3 race meetings. To get over 100 will mean rebuild every race.

Someone will come along and correct me.

[Fallout]

Easiest upgrade ...

Get a scania truck turbo. Bolt that on. Maybe use some tumbledryer hoses to route the exhaust through it and a hose pipe from the impeller to the air box. Do something with the fuel air mixture programming (perhaps a gameboy would work). Hold on for deal life! :D

Seriously though, I reckon a turbo is probably a possible mod. Leave the main block alone and just deal with the exhaust and the air intake and the fuel mixture. It'd be funny as feck to see what happens. I reckon it'd be far far harder to do than the image of welded pipes and a truck turbo in my head suggests! :D

If the dump sounded like this, it'd be quality!

24afjVqm2Uw

[yorkie_chris]

Yeah but everything costs money..Could be a worthwhile investment ?.

Worthwhile investment... in racing... ahahaha. You mean wanking absolutely loads of money away for a bit of a laugh right :-P

If you are serious then why don't you have a search for the antics of "arctic donkey" on the twf racing forums.
He has a pointy engine very much tending toward "pull pin and await bang" tuning with not a great deal of financial constraint.


However what you will find is it is simply an engineering limit. Bearings are only so strong, the SV cases are only so wide to fit bearings of a certain size in.

If you look at the crankpin of one of those motors you will find it is absolutely MASSIVE. When you see that you'll realise you'd be on a hiding to nothing as if you want sheer horsepower go for sheer size.

Alternatively buy a GSXR 11 and put a turbo on it. It's been done many many times and you could probably hit 250bhp or so for under £2k.