v-twin under 650cc? - SV650.org

26-10-11, 06:45 PM

Hi, I'm currently designing a bike engined car (think like a kit car), and I would like to use a V-Twin engine for it's torque, but it must be under 610cc and four stroke.

Any suggestions? Must be a recent engine that is easy to get hold of and with good quality parts availability.

Thanks

Dave20046 · 26-10-11, 06:52 PM

sv400 springs to mind. I'd think it'd need to be pretty light to go for torque over the big difference in hps.
But most likely wrong.

Are you just designing or are you actually going to make? I have a good contact in sheffield engine wise but your needs may be a little specific.

rictus01 · 26-10-11, 06:59 PM

honda transalp or revere(ntv) are both 600cc or there abouts and would fit your requirements although the Tranalp is about 50bhp as it runs a 9.2:1 com ratio, the revere is about 57-8 bhp.

Cheers Mark.

littleoldman2 · 26-10-11, 07:14 PM

Any preference for shaft or chain drive.

stormingjoe · 26-10-11, 07:57 PM

Varadero 125, yamaha Virago 535, honda bros(ntv, revere) as a starter.

26-10-11, 08:14 PM

Aprillia RRV450

26-10-11, 09:20 PM

I have a Hyosung GT125R which is a v-twin and is actually a very good engine, they also do a 250 v-twin. Their engine are based on the SV.

But that RRV looks NARCE. would have saved my tonnes on insurance seeing as I'm only 18!

NTECUK · 26-10-11, 09:38 PM

Honda NTV 600 REVERE

26-10-11, 11:28 PM

Quote:

Originally Posted by Dave20046

sv400 springs to mind. I'd think it'd need to be pretty light to go for torque over the big difference in hps.
But most likely wrong.

Are you just designing or are you actually going to make? I have a good contact in sheffield engine wise but your needs may be a little specific.

Hi Dave, this is for Hallam's Formula Student car. We're doing a paper design right now, and possibly entering the competition with designs on paper this year (there is a class for paper entries, without a physical car).

We have the opportunity to build it next year and go ahead to race it if we do a good job with the design.

Your contact may be useful for some general questions or insight? Depends if it's relevant on what we need though.

Everyone seems to use the CBR600RR/R6 (IL4) etc engines, I want to do something different.

It's an autocross course with speeds ranging from 29-35mph, with brief stint of 65mph. It must also be fitted with a 20mm restrictor. I was thinking what's the point with having the top end power when I want a grunty engine with plenty of torque at low revs, to give improved acceleration at these low speeds, much like my own SV (although it's over the 610cc, it would've been ideal otherwise).

This year we're using an SXV550 engine at the moment and it's ok, but they're having big problems, so I thought I'd try to think of an alternative for my own design.

See here for more info: http://www.formulastudent.com/default

STRAMASHER · 27-10-11, 07:25 AM

My 650cc Honda Bros was dynoed 44bhp at the back wheel(k&n/jetted). Torque peaked at 3000rpm and went on nice and flat..... its just there is not very much of it.

If you regard the aprilia SVX's as only ok up against 600SS 4's everything mentioned here will get completely slaughtered.

The capacity restriction kills the twin thing, for me.

26-10-11, 06:45 PM	#1
Scythe92 Guest Posts: n/a	v-twin under 650cc? Hi, I'm currently designing a bike engined car (think like a kit car), and I would like to use a V-Twin engine for it's torque, but it must be under 610cc and four stroke. Any suggestions? Must be a recent engine that is easy to get hold of and with good quality parts availability. Thanks Last edited by Scythe92; 26-10-11 at 06:47 PM.

26-10-11, 06:52 PM	#2
Dave20046 Member Mega Poster Join Date: Jul 2008 Location: Sheffield Posts: 10,274	Re: v-twin under 650cc? sv400 springs to mind. I'd think it'd need to be pretty light to go for torque over the big difference in hps. But most likely wrong. Are you just designing or are you actually going to make? I have a good contact in sheffield engine wise but your needs may be a little specific. __________________

26-10-11, 06:59 PM	#3
rictus01 Member Mega Poster Join Date: Jul 2003 Location: South London Posts: 9,799	Re: v-twin under 650cc? honda transalp or revere(ntv) are both 600cc or there abouts and would fit your requirements although the Tranalp is about 50bhp as it runs a 9.2:1 com ratio, the revere is about 57-8 bhp. Cheers Mark. __________________ Life should not be a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, in a cloud of smoke, thoroughly used up, totally worn out, and loudly proclaiming, 'Wow! What a Ride!

26-10-11, 07:14 PM	#4
littleoldman2 Member Mega Poster Join Date: Jun 2011 Location: Cramlington Northumberland where we are truely blessed Posts: 1,388	Re: v-twin under 650cc? Any preference for shaft or chain drive. __________________ used to be littleoldman but forgot password due to failing memory

26-10-11, 07:57 PM	#5
stormingjoe Member Join Date: Oct 2010 Location: Norf Hampshire Posts: 152	Re: v-twin under 650cc? Varadero 125, yamaha Virago 535, honda bros(ntv, revere) as a starter.

26-10-11, 08:14 PM	#6
hardhat_harry Guest Posts: n/a	Re: v-twin under 650cc? Aprillia RRV450

26-10-11, 09:20 PM	#7
Destruktor77 Guest Posts: n/a	Re: v-twin under 650cc? I have a Hyosung GT125R which is a v-twin and is actually a very good engine, they also do a 250 v-twin. Their engine are based on the SV. But that RRV looks NARCE. would have saved my tonnes on insurance seeing as I'm only 18!

26-10-11, 09:38 PM	#8
NTECUK Member Mega Poster Join Date: Apr 2011 Location: essex Posts: 5,314	Re: v-twin under 650cc? Honda NTV 600 REVERE __________________ Raisin cookies that look like chocolate chip cookies are the reason I have trust issues.

27-10-11, 07:25 AM	#10
STRAMASHER Member Mega Poster Join Date: Mar 2006 Location: Sunny Glasgow Posts: 1,715	Re: v-twin under 650cc? My 650cc Honda Bros was dynoed 44bhp at the back wheel(k&n/jetted). Torque peaked at 3000rpm and went on nice and flat..... its just there is not very much of it. If you regard the aprilia SVX's as only ok up against 600SS 4's everything mentioned here will get completely slaughtered. The capacity restriction kills the twin thing, for me.

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