Evo 8 pistons/rods

[gsxeclipse97]

Ok i searched and found that some people are running the pistons with no problem. but i didn't see anything about the rods fitting on a 2g crank. Since my motor spun a bearing i was going to have the machine shop put my motor together and use the evo rods and pistons But before i go through with this i need to make sure that these will fit. Also the machine shop says that they want to bore the block 0.20 over. I was at the mitsu dealer and i had them look up and see if they could get the pistons for 20 over and the only thing that came up in th computer was .50 over So is it nesscary for them to bore it if there is nothing wrong with the walls of the cyclinders?. So the two main question i had was will the rods fit on my crank?

Well I got no responses to this so im bumping it to see if anyone has a thought. Also If im able to run these pistons will i need to have dsm link to measure knock count so that i don't have the boost to high. Im not going to be running more than 13psi until after the motor is broken in. I know with the higher compression i will need to run less boost anyway not to cause knock. I also have arp head studs already in just incase i decide to move the boost up after everything is fixed.

Well I know that, Im just trying to get a response but I found my answer on dsmtalk thanks though.

 

[turboglenn]

If you're not getting answers here, start googling. ( that's what i do ). And just a heads up... they don't like "thread bumping" around here.. I found out the hard way

 

[Purevil]

The rods will bolt up, they are the same dimensionally as 2g rods. I am suprised more people aren't using them, they are the cheapest forged 7 bolt rods on the market.

As for not being able to find pistons at the dealership, your comparing apples to oranges. The machine shop said 20 over which is 0.020 inches. The dealership had .50 over pistons which is .5 millimeters.

0.020" = 0.50mm.

 

[dsm-onster]

Can you post information verifying that the rods are forged, please?

 

[Purevil]

Can you post information verifying that the rods are forged, please?

Sorry about the lack of verification.. This is common knowlege on evo boards but I guess its new to some dsm guys...

Mitsubishi Sirius engine - Wikipedia, the free encyclopedia

"Output for the US-spec 2003 Mitsubishi Lancer Evolution is 271 hp (202 kW) at 6500 rpm with 273 ft·lbf (370 N·m) of torque at 3500 rpm. It has a cast iron engine block and aluminum DOHC cylinder head. It uses MPI multi-point fuel injection, has 4 valves per cylinder, is turbocharged and intercooled and features forged steel connecting rods. With the release of the Lancer Evolution IX (286hp @ 6500rpm, 289ft*lb of @ 3500rpm, 7000rpm redline), it has received Mitsubishi's MIVEC variable valve timing system, which gives smoother power delivery and a flatter torque curve."

 

[meliketoball]

The rods will bolt up, they are the same dimensionally as 2g rods. I am suprised more people aren't using them, they are the cheapest forged 7 bolt rods on the market.

As for not being able to find pistons at the dealership, your comparing apples to oranges. The machine shop said 20 over which is 0.020 inches. The dealership had .50 over pistons which is .5 millimeters.

0.020" = 0.50mm.

Why can't we all use the same lingo around here? hahaha.

 

[dsm-onster]

Sorry about the lack of verification.. This is common knowlege on evo boards but I guess its new to some dsm guys...

Mitsubishi Sirius engine - Wikipedia, the free encyclopedia

"Output for the US-spec 2003 Mitsubishi Lancer Evolution is 271 hp (202 kW) at 6500 rpm with 273 ft·lbf (370 N·m) of torque at 3500 rpm. It has a cast iron engine block and aluminum DOHC cylinder head. It uses MPI multi-point fuel injection, has 4 valves per cylinder, is turbocharged and intercooled and features forged steel connecting rods. With the release of the Lancer Evolution IX (286hp @ 6500rpm, 289ft*lb of @ 3500rpm, 7000rpm redline), it has received Mitsubishi's MIVEC variable valve timing system, which gives smoother power delivery and a flatter torque curve."

How much stronger are these internals than, say, 6-bolt rods? I havn't been to the evo forums in QUITE a while.

 

[EmeryatSTM]

I have gone 10.6@134 on a Evo stock bottom end. Im guessing its about 600 WHP. The car weighs about 3300lbs. with me in it. Also that reving the car to almost 9k with stock rod bolts! I would not recomend that though.


-Em

 

[dsm-onster]

I have gone 10.6@134 on a Evo stock bottom end. Im guessing its about 600 WHP. The car weighs about 3300lbs. with me in it. Also that reving the car to almost 9k with stock rod bolts! I would not recomend that though.


-Em

I'm on evolutionm.net at seeing that most limit those to low 500whp. . . That's where stock 6-bolts seam to have their limit.

Looks like an excellent upgrade for 7-bolt guys! It seams that evo8 rods/pistons are slightly stonger than a 6-bolt rods/pistons. Are the pistons that go first or is it the rods? That's the next question.

 

[CT DSM 06114]

i have a set of evo pistons with rods. the specs i found on vfaq for the 2g rods match the evo rods i have here. so therefore, the combo i have here, will fit the stock 2g bottom end.

 

[dsm-onster]

I'm certainly not liking the 8.8 CR pistons for boosting at 500whp! Does the evo VIII heads have smaller combustion chambers or is this the same CR that will result when swaping to a 7-bolt DSM 4g63?

 

[gixrman]

I have them in my car now, I bought them used off ebay, replaced the rings and berings. No problems to date. I torqued them to 2g specs. And I went with 2g rod berings. Oh and you can get the pistons from mitsubishiparts.com

 

[gsxeclipse97]

So since i will be able to use these thats great. I was so as long as my 7-bolt wont crank walk after its rebuilt then i will be completely happy with that set up

 

[95gsttsi]

i plan on running either evo or evo 9 pistons and rods in my next 7 bolt build..

 

[gixrman]

Wow bring'n this back from the dead. Anyway my current motor just died due to oil pump failure so I'm building a 7bolt with evo8 piston/rod combo and will do a blog entre about it with all the yummy details.