Rb26 Rod Strength Settled!

[Cateans05]

So why are you changing pistons if Adam didn't?

Becaue theres many examples of stock pistons cracking ringlands. Ive gone aftermarket because they where cheap and for knock resistance (although ive gone e85).

Fair play people want a cheap insurance... but insurance from what? Im still yet to come across a stock rod failure thats not caused by rod bolts. Let alone anyone whos come to this topic with a massive failure. Which is the point of this topic and no one has come close to answering yet except for one person.

This r34 gtr will destroy so many myths about what people think how a rb26 should be built.

Edited March 15, 2015 by Cateans05

[GTRPSI]

Mercury ran 850hp at all 4 (630Kw) in their R34 GTR on 43 PSI with a stock bottom end from what i remember.

They too wanted to find the limit and were expecting failure.

Finding the limit is sort of like playing Russian roulet, one engine lets go at 450Kw, another at 650Kw, so whats the real known limit?

There is no magical number.

There is only toss a coin and take a gamble.

But remember one thing, rod bolts are a stressed item, when new they can take more stretch and pounding, once cycled too many times they become fatigued.

Guess what happens next? ......

[Cateans05]

FYI Adam is the owner of JEMS.

[Ben C34]

So people are going to think an rb26 should be built with second hand pistons?

As said, some engines make heaps of power. Some don't.

Often the unopened engines are the ones that don't break. Heaps of well built engines fail due to silly mistakes.

Good luck with it.

[Cateans05]

Lol These pistons have been measured and tested. Theyre in perfect useable condition.

Thanks, be sure to check back in 6-12 months!

I just spoke to Adam via facebook. His car held up fine and took a pounding! Mad

Edited March 15, 2015 by Cateans05

[Ben C34]

How much power you chasing anyway? And why aren't those pistons still in the engine they came from?

Edited March 15, 2015 by Ben C34

[QUP29]

Popcorn time

[Cateans05]

400-450kw mark. Keeping the revs on the low down 8.5k. Came out of a spare block, from a bloke who had it as a spare, but went 3.0L.

[zebra]

if an engine fails...and doesn't just wear out.

then the components can't handle the application.

Adams car lasted 1 event. It may throw the legs out of bed next time he drives to the shops.

are you prepared for a massive engine failure op?

[Ben C34]

Well there are guys making 4ooplus and Royce made 510rwkw on an unopened neo, With cams and springs, and head studs replaced leaving the head on.

Do that.

And get the awesome neo vct action.

[GTRPSI]

Just dont stress the engine, the moment a rod bolt goes through a few high stress cycles it will weaken and fail eventually.

This can be seen in motorsport, prostockers throw out rods after so many runs, track engines getting new fresh rods every season or 2, F1 engines detunned to survive just a few races.

Its all based on metal fatiuge which is why most people stay away from second hand pistons and rods.

Id only use second hand parts or stock parts in a stock build, where the parts are working within their designed conditions and parameters.

[Ben C34]

Wait, that was with stick springs. New springs and more boost was 568kw. Below your rev limit.

Do that.

Edited March 15, 2015 by Ben C34

[Cateans05]

Well there are guys making 4ooplus and Royce made 510rwkw on an unopened neo, With cams and springs, and head studs replaced leaving the head on.

Do that.

And get the awesome neo vct action.

neo rods are rb26 rods

Wait, that was with stick springs. New springs and more boost was 568kw. Below your rev limit.

Do that

Hahaha nah thats WAY to much. Im keeping it within the avearge stock 26 gearbox parameters.

[Ben C34]

See. I was helpful. I thought most people knew neo rods were rb26 rods.

[Cateans05]

See. I was helpful. I thought most people knew neo rods were rb26 rods.

Well played sir! I like how you did that!

Thus why neo 25s are more superior to S1

[Ben C34]

And rb26

[zebra]

pffftt sif those neos are better than the matchstick rod equipped hydraulic lifter early rb25

[Blackkers]

If you're going to build a slapper that's probably the way to do it. Just use new rings and make sure the bores are the right size. Rods are probably already balanced with the pistons if they're still assembled. Get them rebalanced if you're picky

[Cateans05]

If you're going to build a slapper that's probably the way to do it. Just use new rings and make sure the bores are the right size. Rods are probably already balanced with the pistons if they're still assembled. Get them rebalanced if you're picky

Thats more or less the gist of it all. Luckily im doing 70% of the work, that will save me thousands. So i can afford to pull it down again later if need be. Ill be sure too post back here wth results etc

[iruvyouskyrine]

Build engine with standard rods and aftermarket Pistons if that's what you want to do. But be sure to abuse it (and video it) and post back with results(and videos)