-matt
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| posted on 4/5/10 at 12:15 PM |
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R1 performance in indy R
im looking at building a MK Indy R and am thinking of fitting a R1 motorbike engine. with the sierra diff.
can anyone who has done this tell me what sort of performance to expect.
0-60?
top speed?
cheers,
matt
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mads
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| posted on 4/5/10 at 12:19 PM |
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it's kind of an open-ended question as it will depend on a number of factors:
- engine age
- any engine mods
- rolling road performed
- diff ratio used
- weight of final car
I am building a 2008 R1 Indy R. Stock engine should give me around 170bhp. Wont know speed/acceleration til its built but I hoping for 0-60 in under
4.5s and a top speed of around 130 (but this is diff dependant).
We gain knowledge faster than we do wisdom!
Life is not a journey to the grave with the intention of arriving safely in a pretty and well-preserved body, but rather to skid in
sideways, thoroughly used, totally worn out and loudly proclaiming... "f*ck, what a trip!"
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TimC
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| posted on 4/5/10 at 12:30 PM |
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quote:
Originally posted by mads
I hoping for 0-60 in under 4.5s and a top speed of around 130 (but this is diff dependant).
Seems reasonable enough.
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scootz
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| posted on 4/5/10 at 12:39 PM |
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I had an MK with a 2005 R1 engine in it and I'd say those figures are just about achievable.
It's Evolution Baby!
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mrwibble
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| posted on 4/5/10 at 12:46 PM |
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if u haven't already bought a sierra diff, i think some people use freelander diffs as its lighter and the ratio is better for a bike engine?
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TimC
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| posted on 4/5/10 at 01:00 PM |
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quote:
Originally posted by mrwibble
if u haven't already bought a sierra diff, i think some people use freelander diffs as its lighter
TRUE
quote:
Originally posted by mrwibble
if u haven't already bought a sierra diff, i think some people use freelander diffs as the ratio is better for a bike engine?
It is dangerous to assume that this is correct in all cases but most MY R1 engines do work reasonably well with the 3.21 ratio assuming tha the tyres
aren't too big.
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iank
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| posted on 4/5/10 at 01:11 PM |
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Freelander diff doesn't come with an LSD and AFAIK there isn't an aftermarket LSD available.
So if you feel you need/want and LSD Sierra is the way to go.
--
Never argue with an idiot. They drag you down to their level, then beat you with experience.
Anonymous
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-matt
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| posted on 4/5/10 at 01:17 PM |
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cheers, i haven't bought anything yet.
im still researching what im going to have to buy.
is it possible to change the ratio on the sierra diff's?
and what would the best ratio be?
ideally im looking for around 0-60 in around 4.5 secs and a top of at least 130.
also is it possible/easy to get much more power out of the R1 engine?
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TimC
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| posted on 4/5/10 at 01:32 PM |
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quote:
Originally posted by iank
Freelander diff doesn't come with an LSD and AFAIK there isn't an aftermarket LSD available.
Not true. Quaife do one but they are not cheap.
quote:
Originally posted by -matt
what would the best ratio be?
On a Sierra diff, I'd say you want a 3.38 which again won't be cheap.
Have a look at this thread. It should help to answer some of your questions
about ratios.
quote:
Originally posted by -mattalso is it possible/easy to get much more power out of the R1 engine?
No, get a Power Commander and if you want more the only thing really worth doing is fitting a turbo.
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iank
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| posted on 4/5/10 at 01:39 PM |
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quote:
Originally posted by TimC
quote:
Originally posted by iank
Freelander diff doesn't come with an LSD and AFAIK there isn't an aftermarket LSD available.
Not true. Quaife do one but they are not cheap.
Fair enough, they must have started making one once people started fitting them.
--
Never argue with an idiot. They drag you down to their level, then beat you with experience.
Anonymous
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A1
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| posted on 4/5/10 at 02:50 PM |
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ive got a 3.92 sierra diff on a 03 r1, ive reworked the head a bit and got a powercommander, iridium plugs (they claim to help acceleration) and
filters. it pulls easily to 110, but feels like it could go a lot further. acceleration is immense, i think in the 3. something kinda range going on
rough timing.
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fesycresy
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| posted on 4/5/10 at 03:15 PM |
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Are the ratio's different from the '03 and the later models? My '03 ran a 3.62, which for the road (unless cruising) I think was
ideal.
However, I think a 3.38 may have been better, especially for the track, where higher maintained speeds would be an advantage. A 3.38 with an ATB would
be very nice.
Freelander, well I've heard many problems over on the WSCC, so much that Westfield stopped using them. Again I'm not sure how reliable the
later ones are.
Want more power? Fit a ZX12 / ZX14 / Busa from the start.
I'm suprised none of the CEC gang have suggested a pinto yet 
-----------------------------------------------------------------------------------------------------
The sooner you fall behind, the more time you'll have to catch up.
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adithorp
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| posted on 4/5/10 at 06:55 PM |
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Freelander diff is OK with R1's upto '03. From '04 onwards the R1 has a higher final drive. Mine gets to 72 in first and tops out
(theoretically) at around 150. In the Fury it's fine (still accelerating hard at 135) but you'll be hard pressed to get use of the top of
the rev range in 6th, due to the poorer aero.
Sierra 3.38 would be fine in a seven. Will give you 0-60 around 4secs depending on weight and top out around 125ish. Try the gear checker sticky
thread to get the figures.
adrian
"A witty saying proves nothing" Voltaire
http://jpsc.org.uk/forum/
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