R31 conversion to RB20DET

[Guest jimmyd17]

thanks slip,

yeh, true.. but i guess the RB20DET being a twin cam also counts for a lot.

this may be a silly question, but what is fmic? what does that stand for? and i'm not familiar with the t3 turbo... whats that about?

[R31Nismoid]

FMIC = Front Mount Intercooler

t3 = just a name for a turbo design.

different sized/flowing turbo's have different product names.

[Guest jimmyd17]

Originally posted by Fast31

I would also suggest 4.11 diff ratio's. [/b]

Thanks Fast31, its great to hear from people that have actually done the conversion. Thanks for your input, i appreciate it.

I understand that the 4.11 ratio is out of the pintara's... how did you go about putting that into the skyline diff? I am presuming you still used the skyline diff, as it is stronger and has the 4 pinion centre rather than the pintara's 2 pinion...

Also, how would the 3.889 diff out of an auto skyline line up against the 4.11... and what about the 3.7 out of the manual skyline?

Thanks heaps!

[PSI_GTSII]

Jimmy I would suggest if you are new to the engine conversion game, just grab yourself an r32 RB20det front cut and get someone to swap it all over for you as is.

I think you will be more than happy with the performance, I would estimate it to be 1 second quicker than an RB30 manual over the qtr on standard boost alone, put 14psi into it and you'll crack a 13......which is a big difference to the RB30!

I myself have Turbo'd the NA RB30 in my Skyline....

[Guest jimmyd17]

Originally posted by PSI_GTSII

Jimmy I would suggest if you are new to the engine conversion game, just grab yourself an r32 RB20det front cut and get someone to swap it all over for you as is.

Thanks PSI_GTSII... these are the reasons i want to do the conversion myself: 1, i dont want to spend a lot of money on it. 2, i really want to learn. 3, i have time on my hands. 4, i have another car so it doesnt need to be finished in a hurry. 5, i have a garage pretty well set up....

Why do you say; get someone else to do it? and how much do u reckon it would cost? is it worth it?

Thanks again for your input

[slip]

putting the motor in (and maybe gerabox) is bloody easy.

the rest.......well thats why he said "give it to someone else"

[Guest jimmyd17]

thanks slip,

in your opinion, what are the hardest things to do when you're changing to a different engine

[R31Nismoid]

Originally posted by jimmyd17

I understand that the 4.11 ratio is out of the pintara's... how did you go about putting that into the skyline diff?

Don't got the Pintara Centre.

get an IMPORT diff out of an R31 coupe.

I'm pretty sure they are the R200.

they are 4.11, LSD

and tough as nails mate, they can handle 200+kw without a drama.

With the 4.11

you'll have a better off the line take-off, but the trade is your car will rev's will sit a little high on freeways n stuff.

But it's not like a 1000 RPM difference or anything so it's all worth it.

Don't bother using the Pintara Diff bits/borg waner parts, they are not designed for any power and you'll just have drama's.

like i said...

www.r31skylineclub.com

There's heaps of info on the forums there.

it's all been done before mate and there are a number who have done it.

[Fast31]

all you have to do is get a pintara crown wheel and pinion and put it on your 4 pinion centre nad use your original 28 spline axles.

with a good LSD they will be hard to break mate

Dont go the locker option like i have as you will have troubles.