So her goes my first post here

I'm looking for US made forged pistons and conrods (JE, Wiseco, Carrillo, Crower and so on), I have searched around on the net finding lots of parts for Eclipses and Galants but very little info on specific EVO parts.

Anybody here that has bought such parts for thier EVO? Would parts for late model Eclipses fit the EVO?

I'm looking for stock 85mm boar pistons since the engine is brand new and I don't want to get oversize and need reboaring. I might consider a slightly lower compression ratio but not lower than 8.5:1.

Same thing for the rods, they should be bolt on.

The main reason for this is cost, I could get Japanese parts, they are really nice but way more expensive and when it comes to pistons I've only been able to find oversize like 85,5 or 86mm.

So all you EVO guys in the US please help me out here!!!

And btw. I’m from Sweden so if my English isn’t 100% please bare with me.

 

PM or email if you're interested. We can help you out.

Darryl

 

www.theoldone.com Components Section
/pistons at the bottom... ask for the "hand finished set"... never seen more detonation resistant pistons made... The Honda crowd who INSTALLED them swore by them. Manufactured by Wiseco.



dons flame suit...

 

yeah, till we relized that anyother piston design will easily make 20 more hp. endyne pistons just dont make the power.

if you want some good pistons that WILL make the power check out RLZ engineering. www.hondaraceengines.com yeah it says honda, but he does everything. Brad worked for several nascar teams designing pistons. he was the first one to design a strutted piston for a street driven import as well as the first to use gas ported pistons on a street car. their civic si went 12.0 at 128ish on a motor they tossed together from spare parts, thats in an almost full interior civic, 2600lbs and a 1.8liter engine.

his pistons are good for around 5-8hp per piston more than anyone else.

 

So what engine did you run the Endyn designed Wiseco Pistons in? Your saying you couldn't safely run more advance with them? Interesting.

 

there are COUNTLESS people that jumped on the bandwagon and ran these pistons. they made ok power. then we started noticeing that an off the shelf JE or Wiesco piston would always have more power.

yeah they allowed for more advance... you had to do that to get any power. you could stick a normal je or wiesco piston in the motor and make more power with alot less advance.

 

The off the shelf in stock Pruven new design pistons make 20 whp over stock on a stock engine and stock turbo - I have had them in my car for 5,000 miles now - they work great

 

thats awesome... same compression and all?? got any pics of the pistons?

people dont put enough research into buying pistons. they can make or break your motor.

RLZ's NA motor was making over 250hp NA from 1.8 liters at only about 12:1 compression. people with "normal" piston designs were having to go to 13 and 13.5:1 pistons to do this. very few people with endyne pistons have made anywhere near this type of power.

 

Yeah, I can't see how a piston can make a signifigant increase in power at the same exact compression ratios. A gas ported piston would give you a bit more ring sealing pressure though which is good, but I don't know of any off the shelf pistons that come like that.

As far as the rods go, Eagle started making decent rods a while back. I was considering these for an inexpensive upgrade to the 1g big rods when eclipsing the 400+HP mark on the GVR4. There's probably some other companies around now. (I've been out of 4g63 tuning since the last Galant, but now that the Evo is here I'm getting sucked back in. It's a disease I tell ya)

 

So your going to change pistons and rods but not do a crank replacement ?

 

You can "clean up" any piston (OE in some cases) and make more power than an off the self piston "in the rough". Hey, what the hell would I know, I spend too much time "outside the box" anyway... Guess this old man should have learned a long time ago to leave the forums to the main streamers...

 

outside the box is why RLZ is one of the most sought after engine builders on the east coast. there is currently a 6-8 week waiting list to get on the waiting list for head work.

pistons can make a HUGE difference. just 10 grams can be 10hp easily. the placement of the ringlands, the shape of the dish, etc, etc.

value... normally stock cranks are plenty good for whatever power you wana throw at em. in the honda world anyway almost noone does an after market crank, they are very nice forged pieces from the factory, im sure the evo is the same way.

 

I am making over 500 hp on a stock crank? There are guys who have made over 700WHP on a stock crank.

 

Just for everybodys information, this is for a friends EVO VI TME, I’m driving a VII myself. I’m just helping him out here since his English isn’t that good.

No crank replacement, he’s not going to do more than 350-360hp so there should be no problems with the crank. That might come in a later stage.

This is his current setup:

MoTec M48 Pro engine management system with 3 bar MAP sensor, Forge Intercooler, Ralliart Intercooler piping, Carbon intake pipe with open style air filter in carbon box, HKS SSQV dump, Custom made stainless exhaust manifold, 3" custom made turbo elbow, 3" full turbo back stainless Mongoose exhaust cat removed, Walbro fuel pump, NGK B9EGP racing plugs. Running 1,6-1,7 bar of boost.

He just recently had a major engine failure where one of the stock rods broke and made a couple of nice holes in the block This is the reason for this upgrade of internals. The engine is now rebuilt with a new stock short block so that's why he doesn’t want any oversize pistons. The engine has only some 10 minutes of running time now since the car is garaged for the winter.

The rods in the EVO8 are supposedly stronger than the ones in the EVO6. Originally we had plans to change to EVO8 rods and pistons but after comparing an EVO6 and an EVO8 rod side by side I quickly changed my mind to go for true aftermarket forged items. Visually the look almost 100% the same and as far as I can tell they are NOT forged in the 8 as has been a major discussion here form what I’ve seen. I heard from Mitsu Sweden that the rods from the 6 and the 7 are beeing phased out as genuine parts and replaced with the rods from the 8 so probably they realized that they were too weak. I know of a couple of engine failures here in Sweden where a rod has broken even on stock EVO6's.

For his setup we could probably go for just the rods and keep the stock pistons but we have decided to change both while at it.

 

...just remember to measure the cylinder bore closely (and piston to wall clearance of course). I'm not a fan of not going at least with a slieght over bore piston to clean up the cylinders and assure a good seal. Of course some numb nut is going to come along behind me and say you don't need to and how many engines THEY have built with no problem...