I am considering an R6 engine after looking at the top speed and BHP on the R6 as apose to the R1, I think only 30BHP difference and maybe 12 MPH
difference. Is there any reason to opt against an R6 powerplant?
Does anyone have an R6 fitted in there cars?
What kind of top speed would you get from say an MNR or similar car?
The vehicle I am going to be building is a Trike, so lighter than a type 7 car.
Cheers
Nick
It's the torque that the BECs need, I think that the R6 might struggle to move a BEC unless it was very lightweight, with alloy uprights, light alloys and tyres etc.
Don't do it!
The R6 makes its top power through ram air so you will not see the power in a BEC.
In the real world the circa 400cc will make a MASSIVE difference!
You're comparing the bikes. The power to weight will have a massive effect in a car. It'll still be quick but a r1 engined car would trounce you. Don't do it.
I guess I need to save my pennies then :-)
Cheers for the info, I am nearly at a point of buying the complete bike, but just wanted some info on what the toughts were, but I need to save more
money now :-)
Cheers
Nick
Try this site http://www.motorcyclespecs.co.za/ may help with you power/torque figures etc
Newer R1s makes 180 BHP at around 12,000 RPM. R6s make 130 at 14,000. The big difference is torque. just over 100 vs 68 Nm. You need the torque in
a seven.
My 150 BHP carbed R1 engined MNR would do 0-60 in 4 seconds plus however long it took you to change gear. It was a bit lardy at 520kg. An R6 engined
car would match it if it weighed 300kg. You'd have to try very hard to make a road legal seven weigh as little as that. Go for the bigger lump.
There is a hell of a shock when you get off an R6 and have a go on an R1 bike, I thought about going straight to the police station and giving them my
licence as it wouldnt be long before they took it anyway!!!!
BHP sells cars, torque wins races.
Its not just the figures you need to look at, you need to look at how its delivered and where in the rev range.
600cc bikes feel gutless compared to 1000cc ones..... 1000cc IL4's do compared to 1200cc v twins
He's building a trike though lads.
The R6 wouldn't be my donor of choice but the lack of grunt might not be as problematic as it would be in a seven.
There are plenty of 600cc race cars, Global lights, Jedis etc that are incredibly rapid. How much heavier would a lightly built trike be? They are
single seaters though.
I would echo the comments above however. Don't use an R6.
I would be tempted to use a GSXR750, just to be different.
150 hp and 15000 revs. Titanium rods.
From what I have seen it seems terribly easy to light up the rear tyre on a trike.
The comparative lack of low down torque on the GSXR could be an advantage.
I've never driven a trike though. Maybe someone who has might shed some light.....
Geoff
Hiya,
If I had my own preference it would have been a V Twin, something like a Honda SP1 or even my Buell XB12SS would have been fun, but the whole essence
of the TR1KE is in the name I suppose, its designed around the R1 engine, the demo is mind blowing, its just my pocket that needs more pennies now
:-)
I guess I will be buying the R1 then.
The whole thing weighs in around 350KG, so with the R1, its very very powerful.
I guess I knew the answer, but thought I should ask the question.
Cheers
Nick
There is a guy on wscc forum who runs a gsxr750 in a westy track/race/sprint car with great results. Very very high revs could be Fun
a 350kg TR1ke with an R6 engine and standard gearing would take just under 5 seconds from 0-60 but would do nearly 80 in 1st gear. Change the sprockets to lower the gearing and you could move it closer to 4 seconds, so it would be very quick, just not insane. In terms of torque, the low weight of the TR1ke is just about OK for a 600. In terms of torque to weight ratio, it is 95% as good as my carbed R1 MNR, including the weight of the driver. That only suffered from low torque if you slowed rigth down but stayed in high gear. A R6 engined TR1ke would be fine. An R1 engined trike would be a lot faster.