How Much Can Rb20det Rods Handle

[qik32]

hi i was just wondering if any1 knows how power standard rb20det conrods can handle any help would be great

[sproosy]

you should be OK for 200 - 250kw on the flywheel id say. Thats just my guess. Im sure many others will have the exact answer.

[carl h]

i made 288rwkw's on my rb20 before my poor tune melted a piston.....

stock bottom end to boot, better tune should have made more power reliably.

[N I B]

Never seen an RB20 rod fail at any power out put as long as a good oil supply is kept up to them.

[qik32]

ok thanks for your help cause im in the process of building a engine with pistons ,cams , head work and a gt 3040 turbo hopefully should get 300kw at wheels

[RedDrifter]

You might want to get them shot peened and I would say they would be fine for 300kws@ treads.

[carl h]

You might want to get them shot peened and I would say they would be fine for 300kws@ treads.

<{POST_SNAPBACK}>

stockers are already shotpeened,or am i wrong?

[RedDrifter]

Forged yes but not shot peened.

[TokyoTaxi]

BTW The rods in the RB20DET-R in the HR31 GTS-R Gibson race car were stock so that should give you some indication of strength. ( Yes they were shot peened ).

[Roy]

BTW The rods in the RB20DET-R in the HR31 GTS-R Gibson race car were stock so that should give you some indication of strength. ( Yes they were shot peened ).

<{POST_SNAPBACK}>

Unless you rip a Gibson engine down and check, I wouldnt be so sure. I have read the same, and up to recently had little reason to doubt the claim...but now am starting to have my doubts...

[FATGTS-R]

Race car claims are sketchy to say the least.

The gibson cars also had a "stock" intercooler. But for some reason they are different to mine?

[TurbostyleR]

my mate has put down 520rwhp on stock RB20 rods - they where only shot peened and ballanced...

He also turned that motor to like 8500rpm or something like that as well...

[carl h]

my mate has put down 520rwhp on stock RB20 rods - they where only shot peened and ballanced...

He also turned that motor to like 8500rpm or something like that as well...

<{POST_SNAPBACK}>

520rwhp is an awful lot especialy when turning 8.5k redline.

i would really like to see a dyno sheet of that pull.

[RedDrifter]

Remeber the stroke of an Rb20 is fairly short so revs is not such a big problem. Shot peeing rods deos increase the strength of the rod considerbly.

As for them being able to take 520rwhp. That doesn't suprise me but I would have to see it to believe it.

How do the stock RB20DET Rods compare in size to the RB26DETT rods? (other than the length)

[carl h]

while revs are something the rb20 is capable of it does increace engine wear and the potential for something down there to let go.....

ive included a pic of the rb20's stock rods from when i tore down the engine and they felt and looked very beefy to me.

i guess the key to the rods holding power is a proper tune and making sure the engine doesnt detonate at all, which is what seems to cause failure.

Edited December 8, 2005 by carl h

[carl h]

pic as afformentoned.

Edited December 8, 2005 by carl h

[Guilt-Toy]

damn they look short and stubby. look like they could handle heaps of power how does a rb30 rod look compared to that?

[Scribble]

I dont have a comparison as such but here's my donation to this thread, hope its of some help.

[Cubes]

RB30 rod and piston.

The RB30 rod shouldn't need to be as strong as the piston doesn't receive as much side load due to its longer length.

Edited December 3, 2008 by Cubes

[R31Nismoid]

Race car claims are sketchy to say the least.

The gibson cars also had a "stock" intercooler. But for some reason they are different to mine?

yer, its stock position i think, but thats about it.

They dont use the stock Nismo GTS-R manifold either

Wish i still have the RB20DET-R in mine. Not to use, just to anchor my boat with :lol: