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

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).

quote:

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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).

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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.

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?

quote:

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Originally posted by mrwibble
if u haven't already bought a sierra diff, i think some people use freelander diffs as its lighter

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quote:

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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?

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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.

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?

quote:

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Originally posted by iank
Freelander diff doesn't come with an LSD and AFAIK there isn't an aftermarket LSD available.

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quote:

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Originally posted by -matt
what would the best ratio be?

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