engine rebuild

[Guest]

Heya

rebuilding a 98 bg5 gtb wagon motor keeping it stock and twin turbo stock boost, any suggestions on bearings etc i should use? was thinking acl race bearings and maybe some forged pistons? has run a big end due to detonation want to build a strong reliable engine

was told they have forged short skirt pistons standard? is this true? and would it be better to change from short skirt pistons to prevent piston slap??

[D-Style]

Waste of time rebuilding with those parts if you just keeping standard setup. If you want to go that way then sure, its your money.

Maybe a good standard rebuild and a baffled sump instead.

Or just go change out with a Single turbo...

[Koom]

If just rebuilding to keep standard-ish, I'd use STI pistons of the same year. The STI ones are forged, the GTB ones are cast, and crack often. If you need to find a set, just put a thread up as there was a bunch of people pretty much giving them away the other day.

[Drunkenmonkey]

single turbo it while your at it well worth it!!

[ReubenH]

+1 to single turbo.

But yeah, just use subaru bearings, they are good. I've been told more than once; far far better than ACL bearings, and far more expensive..

DON'T go cheap on parts, use genuine parts where possible.

[WRXONP]

id say ACL race series are the best bearinmgs to use .... just my opinion though

and u should go single turbo while the motors no in the car

make sure the bore is the right size for the STI pistons though

oh and if she died due to detonation it would be rather wise to sus out y it was detonating and not just build a stronger motor

[funkytown]

 WRXONP said:

id say ACL race series are the best bearinmgs to use .... just my opinion though

in your wise opinion why is this?

FWIW

1) i'd go standard bearings as the ACL tend to be a lot harder than factory ones and are harsher on the crank / rods / block.

2) its a factory rebuild - so use the same as what it came with

as an aside, i use factory bearings in my 278kw build and they are fine..

[Guest]

 WRXONP said:

id say ACL race series are the best bearinmgs to use .... just my opinion though

and u should go single turbo while the motors no in the car

make sure the bore is the right size for the STI pistons though

oh and if she died due to detonation it would be rather wise to sus out y it was detonating and not just build a stronger motor

i asked pbms if i should use acl race bearings when i rebuilt mine,they said no way enless your hunting for big numbers.standard sti bearings are strong and fine.just like funkytown said hes got a bit of power and running standard bearings.im sure the millions of dollers that subaru invested in building good engines with strong bearings wasnt for no reason.

[RWDallDAY]

yeah run forgies if your gunning for numbers but if your running standard boost etc you may as well go standard.

[WRXONP]

well from what ive seen ive only seen good things from acl race series... they also have less friction so thus meaning more power realisticly

[Koom]

 WRXONP said:

they also have less friction so thus meaning more power realisticly

You realise that the crank/rods don't touch the bearings at all? The oil is what dictates the friction.

[funkytown]

 Koom']

[quote name='WRXONP said:

they also have less friction so thus meaning more power realisticly

/quote]

You realise that the crank/rods don't touch the bearings at all? The oil is what dictates the friction.

Lolol so much win.

[DRFVDR]

 Koom']

[quote name='WRXONP said:

they also have less friction so thus meaning more power realisticly

/quote]

You realise that the crank/rods don't touch the bearings at all? The oil is what dictates the friction.

I was going to let it slide

[rex-leggy]

likewise. dammmm

go for the single . easy to modify further if your that way inclined

[RWDallDAY]

He he yeah with that in mind whats the advantage of race bearings? nil? go the single turbo

[D-Style]

 WRXONP said:

well from what ive seen ive only seen good things from acl race series... they also have less friction so thus meaning more power realisticly

explain this if you would please...