Over the weekend i happend to meet a gentleman with an incredible Burschur Racing Turbo kit with Stage 3 Head...Rods/Pistons. etc.. I was like holy crap.. Then i thought... I Want this power.. then i thought.. how the hell can i afford that.. So now im thinking, what can our engine take, and when is it necessary to do a full head work and rods and pistons etc... I was under the impression we could strap on a turbo kit and just throw in some Head Studs and be fine.. but now im seeing a major overhaul in order to get safe reliable power.. At what point does head and heftier engine work become necessary? How far can we go on a base engine?

 

I believe the number is in the 500-525 on race fuel, after that you run the risk of piston and or rod failure. I mat be wrong but I am 99% sure that is about the max on stock internals.

Shane

 

importtuner said the block can handle at the most 400 whp.

 

I somehow doubt that.

 

a lot of evos have hit 450+whp on stock block.. no problems

 

The block should be good for more than that, it's cast iron. I'm sure you'd have to do internals to get a reliable 400+hp.

 

There are a decent amount of cars running around on 400 plus HP. There are alot of non shop car Evo's with turbo kits driving around with 425-450 @ wheels on pump gas. I got my info from a pretty well known tuner. This is one stout engine but the pistons do kinda suck.

Shane

 

are they that bad? i thought they were forged pistons

 

After about 12 shots of Jagermeister the whole thing goes south!

I believe the magic number is somewhere near 600 crank hp on the stock internals. This info from a reputable source.

 

The problem wit the pistons is that they have thin sidewalls, You should see the difference between an Evo piston and a 1G piston, its pretty substancial. They are thin on the Evo so even slight detonation over a period of time can cause failure versus something hardy that can withstand a little abuse.

Shane

 

Hmmm. well if your getting a 12.1 Watchout on your stock motor. Thats plenty of Power for me. I wanna be riggghht at the verge of top 11's low 12's Ill be happy as a daily driver then...

 

I'm not sure about the pistons, but I know the rods on the Evo should be good for at leat 550whp.

The reason I say that is because a friend of mine dynoed his stock 7-bolt Eclipse motor at 551 whp and 506 tq at 36 psi. I have a stock 7-bolt myself, running around 350 whp for a long time. I have 106,000 miles on my engine.

The Evo has about the same size rods as the 7-bolt Eclipse, but your rods are forged, right? As long as you monitor knock (detonation), you should be fine. That's why engine management that can monitor knock is very important. Hell, if you are knocking, 300whp can blow your engine. It's all about a safe tune. But with no knock, I would expect the Evo to be able to handle 550+ HP. This is just my opinion, though.

Eric

 

The stock block is good for whatever you tune it for. I got it to 512whp then i decided that i better make some changes. LOL. But people have got it to 550whp i believe on stock internals. But like i said its all in the tune 1 bad detination and its all over on the stock pistons. THey are made of silcone which turnes into like a glass substance when heated. So you can imagine what would happen.

Chris

 

512 is very nice. I know my motor is putting down my listed power with an 11.4 a/f so there is a nice safety margin there with room to spare. This is a good thread could be very informative, keep it going.

Shane

 

stock internals I thought were good for a lil over 500 hp but if you change out a few things rods pistons and a few others you can go over 700