Evo 8 Internals

[93 GSX TURBO]

I tried searching and one guy got mixed questions. But I have a friends that bought an Evo Parts Car and he told me I could have his Evo Rods and Evo Pistons. I told him that I think that the internals on the bottom end are the same but that I would get back to him about it. Ive seen him push almost 415hp on 30psi and 590w/ 150shot so I know does internals will hold. So to make a long story short do anyone if the pistons and rods drop right in. Im going tp go ahead and get the SCE copper head gasket since im not taking the block out to get shaved and dont want it to leak. Im also buying New King Rod Bearings. Do you think that this set up will hold 350 to 400hp?

current mods are:

Evo 3 16g
Evo 3 Turbo Manifold
RC 550cc Injectors
Front Mount Intercooler
Aeromotive Regulator
Holley 255 fp
APEX dp/catback
Greddy Emanage

 

[97gstnick]

what? your goals are to hold 350-400hp? that is easily done with your bone stock bottom end.

 

[brute]

Get a set of 2g pistons, get them ceramic coated somewhere, and you'll be home free.

 

[prostreetdsmx1]

we have never tried the stock internals but i can tell you that Eagle rods for the 7 bolt and JE pistons for the 7 bolt are what we have used to build EVO blocks.

i know from Mitsu they are different part numbers for the EVO and DSM cranks but for example the Eagle crank that has become so popular has been tested to work on both the 7bolt DSM block and the EVO block.

Stock for stock i can't say i would recommend tearing a part a motor to put in those internals. Not enough of a difference in strength to be worth it.

just my $.02

Marti

 

[ITSME4G63]

I run evo8 pistons in my motor, Used 1g big rods and bought pistons from mitsu, the car gets compression up the ass! THe rods will have to be machined to accept the pistons, one thing was though, that when we first started it up, it burned oil up the wazoo, tore it apart months later to see the the factory mitsubishi pistons oil rings did not sit for shit, I mean you can drop the piston into the block and it would catch by the two top rings but not the bottom. So had the machine shop cut the pistons to accept fatter 1g oil rings and now it doent burn a drop. Its porolly not worth it if you buy it new, but if you got the pistons for free, machining the rods would be liek 120$ and the rings another 160$ so yeah.

 

[nightspeed87]

I run evo8 pistons in my motor, Used 1g big rods and bought pistons from mitsu, the car gets compression up the ass! THe rods will have to be machined to accept the pistons, one thing was though, that when we first started it up, it burned oil up the wazoo, tore it apart months later to see the the factory mitsubishi pistons oil rings did not sit for shit, I mean you can drop the piston into the block and it would catch by the two top rings but not the bottom. So had the machine shop cut the pistons to accept fatter 1g oil rings and now it doent burn a drop. Its porolly not worth it if you buy it new, but if you got the pistons for free, machining the rods would be liek 120$ and the rings another 160$ so yeah.

so your saying your running the 8:8.1 ( i believe ) compression pistons out of the evo8 in your 1g, and you had to machine it to the rods like done in a 2g, and then you needed custom ring job? If you wouldve used stock evo8 rings it wouldve worked fine huh?
I have 2g pistons in mines and dont think i wouldve wanted to go more than 8:5.1 but how does the evo compression feel? Feel Any noticeable power gains?

 

[93 GSX TURBO]

Im getting the evo pistons for free so If I have to spend another 150buks its not to bad. I was planning on putting some ARIAS piston rings already.

If its safer to use the 2nd gen pistons then I might just do that insteat. But considering that Iam using SCE headgasket, ARP Head Studs, KING Bearings and ARIAS Pistons rings be enough to hold the higher compression that the Evo pistons will put out?

 

[ITSME4G63]

Like I stated before, the reason for me running the 1g oil rings is that the original evo8 ones failed, on all cylinders, the machininst told me that the evo8 oil rings are the thinnest he's seen and told me that the 1g ones are fatter, since I didn't want to take a chance of having the same thing happen again with the evo8 ones, I reused the 2 top compression rings (had like 500 miles on them) and got the pistons cut to accept the 1g rings. This is the same guy that does motors for AMS so I was pretty confident in his decision. I cannot tell you much about the before/after since the car got a front mount as well with the rebuild, which as we all know increases lag, but at 10 psi stock setting the turbo hits pretty quick, and the car has top end like a mofo, but that may be due to the fp2 cams.

 

[94awdcoupe]

Like I stated before, the reason for me running the 1g oil rings is that the original evo8 ones failed, on all cylinders, the machininst told me that the evo8 oil rings are the thinnest he’s seen and told me that the 1g ones are fatter, since I didn’t want to take a chance of having the same thing happen again with the evo8 ones, I reused the 2 top compression rings (had like 500 miles on them) and got the pistons cut to accept the 1g rings. This is the same guy that does motors for AMS so I was pretty confident in his decision. I cannot tell you much about the before/after since the car got a front mount as well with the rebuild, which as we all know increases lag, but at 10 psi stock setting the turbo hits pretty quick, and the car has top end like a mofo, but that may be due to the fp2 cams.

Kills me to read your post. There is no reason the evo8 oil control rings would fail in an early 4g63 bore. Telling people that they need to machine evo pistons to accept big 1g oil rings is as about as rediculous as it gets. You need to find a different machinest. He made some error initially and then had to cover his mistake with you paying the bill. I have used evo8 pistons in a 93 block with perfect ring seal and no oil burning.

 

[ITSME4G63]

Kills me to read your post. There is no reason the evo8 oil control rings would fail in an early 4g63 bore. Telling people that they need to machine evo pistons to accept big 1g oil rings is as about as rediculous as it gets. You need to find a different machinest. He made some error initially and then had to cover his mistake with you paying the bill. I have used evo8 pistons in a 93 block with perfect ring seal and no oil burning.

Im not saying that that’s what needs to be done when putting evo8 pistons on your dsm, its what I had to do, the piston rings didn’t seal and that’s that. Factory defect or something the rather. The machinist didn’t build my motor though, he cleaned it up and such, assembly was done by us according to the dsm manual. So don’t get your panties in a bunch.

 

[Spoolin4Ever]

Im not saying that that’s what needs to be done when putting evo8 pistons on your dsm, its what I had to do, the piston rings didn’t seal and that’s that. Factory defect or something the rather. The machinist didn’t build my motor though, he cleaned it up and such, assembly was done by us according to the dsm manual. So don’t get your panties in a bunch.

Which DSM Manual did you use?

 

[ITSME4G63]

Which DSM Manual did you use?

I dont remember the brand off the top of my head, but its the one that is 1g only specific.