Forged Rb20

[Bl4cK32]

i'm in SA and if i could find a 20 for 500 bucks i'll take 6 the cheapest i've ever seen is 1100 and it didn't include turbo or the intake manifold and a few other bits

ive picked up a few 20's, the last one was complete with manifolds for $100.

edit/ im in SA also

Edited July 1, 2011 by Bl4cK32

[N1 RB26]

ive picked up a few 20's, the last one was complete with manifolds for $100.

edit/ im in SA also

can you tell me where from? was it from a wrecker? which one? please tell me as i need another one for my mates 32

[Simon-S14]

its a matter of who you know and how many mates you have into cars.

i quite often see 20's cheap as shit

[Bl4cK32]

can you tell me where from? was it from a wrecker? which one? please tell me as i need another one for my mates 32

ill send u a pm with details of one going now for cheap

[R31Nismoid]

I get what Team USA is saying about head work, I think what is being lost in translation between convicts and pilgrims is that R31_Nismoid is sayign dont do things to mess with velocity, ie big porting or the inlet and outlet, etc etc. You are right in saying that anything you can do to lessen the resistance of air without dropping velocity is going to be a good thing. Match porting etc etc.

But the key is not just flow, flow is great, more the better, but its the velocity that gives you good culinder filling and torque/response which in a turbo car works well. Get the turbo on speed and the engien delivering torque and then jsut squeeze as much as you can in there with psi!

Ye that is what I'm saying mr Bris

[N1 RB26]

since you guys talked me out of forging, i'm wondering bout stroking cause i have mate that's got a 25 crank and rods i can use this should stroke it to 2150cc with 20 pistons shouldn't it?? but correct me if i'm wrong cause i'm only going off what people have said and what i've looked up so not completely sure if i heard or read right but doesn't the stock pistons come up 0.4mm past the block and with 25 crank and rods it will push it to 1.4mm past but if i put a tomei or acl 1.4mm metal gasket won't this give me the right clearance with roughly same compression just with bigger cc's??

has anyone done this? is it pretty straight forward easy drop in kind of deal? do i need to modify anything? only spitballing

[Rolls]

might as well get a 26 crank and make an rb24 if you are set on wasting money.

[N1 RB26]

yeah well i was gonna pull the head off to replace the rings so i was gonna put a metal gasket on anyway so the only thing i was gonna change was put 25 crank and rods while it's apart putting all the new bearings and seals cause there available so i'm not set on wasting my money it's not gonna cost me anymore than if i wasn't...i was just wondering on how easy it is and if i need to modify anything to fit the crank and rods in

[Bl4cK32]

a few ppl have done it, search here. From memory 26 rods makes a 2.4, 25 rods are 2.3L Machining of the block some is required to clear the swing of the crank.

[Rolls]

Just save up and order an rb25 block, in the long run you will end up doing it anyway, seriously just get a neo rb25, you will be set for the next 10 years if you tune it properly

[Driftnuttz]

From what I have research just the rb25 crank, rods, and stock sized rb20 pistons will only net you a 2050cc engine. You have to use over sized pistons to really up the ccs. Remember the rb25 stroke is only 2mm longer then the rb20, just adding 2mm will not get you much. If your going to do it, you should just go all out and do the rb24. I have to say though, if I was in a place that had rb25 for what rb20s cost here I would have a rb25 in mine........ Good luck.

[N1 RB26]

yeah just for the two bobs worth no machining required for 25 crank and rods only for the 26 crank and rods...and just side point one guy is running RB24 in s15 and is making 340rwkw at 16 pound apparently it's suppose to have a crap load more torque than the RB25 don't know the details of what he's running but supposedly it's not to laggy but people who have been in it have just said it's a freak motor that just runs really well

[Rolls]

it's suppose to have a crap load more torque than the RB25

I can't see any reason why this would be true, the stroke is still shorter surely?

[Bl4cK32]

don't know the details of what he's running but supposedly it's not to laggy

Id like to see the details, as claims mean nothing without proof.

[N1 RB26]

I can't see any reason why this would be true, the stroke is still shorter surely?

i thought the rb24 has a longer stroke than 25 from what i've found and talking to people only going by what i've been told and searched so not sure how true it is may have read wrong...people just say it's a freak motor and it seems that most people say it's got more torque so who knows??? would love to take ride in one

[GTSBoy]

RB26 uses 26 crank which has longer stroke than 25. Unlikely to make much more torque than a 25 though, it's all pretty much same same.

[N1 RB26]

well when i spun the bearing in mine it sprayed schrapnel all over so i'm stripping that one right down and doing the 2.4 and in the mean time i bought another engine to slap in and get around in so i'll soon find out what the 2.4 go like

[Roy]

If you neef RB24 pistons I have some brand new Tomei pistons. Cant see me ever using them since I am a day away from buying a car that already has a built motor

[Driftnuttz]

Doo It.....

[GTSBoy]

RB26 uses 26 crank which has longer stroke than 25. Unlikely to make much more torque than a 25 though, it's all pretty much same same.

That sentence should have started with "RB24".