Rb30det Woes

[bubbabooga]

hey all

few questions

well i got my fully built 25/30 back a few days back.. trying to get the engine and bow together before could but the whole lot into my cefiro and it just would not go, found out the internal diameter of the spigot bush was to small for the gearbox output shaft. so i removed the spigot bush all together.

but im wondering if it is complete a must to run a spigot bush???

like if i can ust not use one at alll and it should still be alright?

other question is iv dummy fitted my motor on its own and it fouls on the clutch master because of the forward facing plenum..

wondering how people have gone about relocating clutch master?

or at least how you get around this??

its a a31 cefiro with a built rb30det and rb 25t gear box.

be running around 360rwkw once run in and tuned..

cheeers in advance guys

tom

[SteveL]

but im wondering if it is complete a must to run a spigot bush???

like if i can ust not use one at alll and it should still be alright?

You must use a spigot bush.

[Bliksem]

go to repco and buy a spigot bush to suit a VL

[bubbabooga]

already gone through 2 brand new spigot bushs..

they slide over the input shaft.

but once i tap it into the back of the crank its like they shrink so much that it cant slide in again...

doing my head in..

[Duncan]

something wierd going on here, maybe its not a standard input shaft on the gearbox. the spigot bush should be a firm but not tight fit to the input shaft.

[Sick_R31]

What are you using to hit the spigot bush in with? Brass drift?

What crossmember and engine mounts are you using?

[bubbabooga]

using the soft wooden end of a broom stick to tap the spigot bushs in..

im using standard engine mounts but got a conversion cross member for rb25 box in cefiro off a mate along with the tail shaft needed for it to alll work.

with the gearbox siting on the ground i can slide the spigot bush over the out put shaft fair easyilly and smoothlly.

the fit in the back of the crank is tight as. and yeah once the bush is in its like it squiish's the bush size down so much that it cant let the out put shaft slide threw..

[Duncan]

and there is definately no deforming of the bush after you've tapped it it, ie can't feel a lip? what about the crank, is the mating surface flat, good and clean?

[Bliksem]

Are you lining the gearbox up correctly? Might be handy to see what happens with a dummy input shaft after the spigot bush has been tapped in

[bubbabooga]

nah no real deforming of the bush or anything. both mating surfaces are clean and that.. i have a used spigot bush which im goona try next and see how it goes.

[bubbabooga]

i dont have access to a dummy input shaft at the moment. my old man lined the clutch plates up with a half inch driver handle.e we have tried adusting the cltcuh plates.. but thats when we figured out it was hitting the spigot bush instead of sliding into it

[Bliksem]

oh... So its a twin plate clutch? my guess is thats the problem, not the spigot bush.

Fwiw I had trouble after installing mine until I got a dummy input shaft...

[bubbabooga]

where abouts did you get a dummy input shaft.

just wreckers or somthing??

we know it was deffinatly the spigot bush as it was being pushed back into the crank further.

[Bliksem]

Where I work has a fully serviced mechanics workshop, I get along well with them so borrowed one... Pretty sre excedy sell dummy plastic ones though

[Sick_R31]

where abouts did you get a dummy input shaft.

just wreckers or somthing??

we know it was deffinatly the spigot bush as it was being pushed back into the crank further.

If you know someone with a blown RB20 gearbox go take the input shaft out of that, pretty sure SR, CA, VG, FJ and L series can be used as well. Exedy sell them but when i installed my exedy hyper twin i used the one they supplied but it was a bit dodgy, it didn't align the clutch propley and i had to use an input shaft out of a blown gearbox i had.

How far in are you hitting the spigot? Does it look like the one below?

[bubbabooga]

yeah i was tapping my spigot bush in exact same distance into the crank...

hmm its hard where i am because im one of the few people in this town that drive an import.. so i have to travel about an hour and half each way to get to jap import spares in adelaide..

i have thought about getting another brand new spigot bush and cutting a thin slice straight threw on side. dodgy i know... i just wanna get this motor and box together

[bubba]

I'll address the clutch master cylinder problem.

I picked myself up a new R33 GTSt clutch master cylinder for when the forward facing plenum and GT35R go on. The 33 item is about an inch shorter, my mate also used one on his 32GTS4 with RB30 and Greddy plenum.