Hey guys. Is there any diffrence between rods and pistons in Evo 7/8/9? Which one can hold more power? Or maybe they are just the same?

 

Power wise it really depends on what they're made out of. Cast pistons are weaker than forged.

 

I mean is there any difference in stock

 

Naturally E9 internals would withstand more power.
I've read that E7 rods are weaker than 8 & 9.
But in general, you would want to upgrade to forged internals when reaching beyond 400hp

 

I've heard 8/9 are the same and 7 rods were also weaker as well. Anyone confirm?

 

were do you guys read this crap??? evo 4 rods are same as evo 8/9
pistons 5-9 are for most part the same.

 

According to Mitsubishi's literature the 8 and 9 pistons are of a "high temperature fatigue resistant alloy" not used on previous versions. My personal experience is that the 8 and 9 pistons do put up with abuse better than previous versions, but this is subjective.

 

I am on Tomei Arms right now and i'm a little scare to put full boost from this turbo on my stock engine in Evo 7. I don't know if I should just change pistons and rods for some forged parts. I would like to see about 420 BHP and 550 Nm...

 

If you're planning to go beyond 1.7bar then go ahead & install forged internals.

 

Thanks. I will be replacing my head gasket, so I think its chance to pull out whole engine.

 

It would be a good idea to through some aftermarket head studs as well.

 

I don't believe there is a difference between the evo 7-9 as far as rods and pistons go.

 

Evo 5-6 do have weaker rods than 7-9

Evo 4 internal are pos

Never seen any e4 hold up well on stock block

 

early DSM 7 bolt engines have made 700whp "stock block" records. the evo 4 block is superior to the early 7 bolts. just because you havent seen any good results from an evo 4 engine may mean you just havent seen any.

 

Evo 4 are a dime a dozen most Evo 4 I know off arent on their stock motor...

I also owned an Evo 4 and have 6 friends with them. Boost a stock block evo 4 at even 28 psi and beat on it. Its not anywgere near evo 5-9 on the beating it can take.