Any 2Gs with Evo Pistons?

[shredwin]

I just purchased this Evo pistons down slowboys, they are used but look in good shape plus I got a good deal. I believe they either came off the Evo 8 or 9. My question is if there are any 2Gs out there with these piston? If your one of them please tell me if your pleased with them or if they are not worth it. Im in the process of rebuilding my motor and im just curious since im still wating for my stuff to be done at slowboys. here is a pic of the pistons.
<a href="http://s74.photobucket.com/albums/i252/shredwin/?action=view&current=Evopistons.jpg" target="_blank"><img src="http://i74.photobucket.com/albums/i252/shredwin/Evopistons.jpg" border="0" alt="Photobucket"></a>

 

[dsm-onster]

Woe. Don't be a smartass. You said deck height not wrist pin height. I would have never thought nor many others that mitsu would abandon the quench zone technique. This thread would be a lot more informative if we would be clear on what we were saying. No one would have thought that mistu would abandon such a technique. Something that Wiseco and Ross Racing Piston companies firmly believe and promote. If you ask Marco Passante a few basic questions he'll elaborate for an hour on quench and quick burn technology. Tech that porche, audi, honda, and dodge developed.

Clearly if you mentioned wrist pin height I would have asked about rod length and then consequently deck height and discovered the fact that mistu doesn't use quench zone tech. Still doesn't sound like a very good option considering Ross and wiseco and other professional piston manufacturers and other 4g63 race motor builders do definately believe in the technique.

 

[magna]

did anyone else notice that the pistons in the picture look like Wisecos? And the box color suggests the same.

 

[projectpat69]

So then, i have heard of many people decking quite a bit it material off these blocks, would it be possible to mill .050-.060 off the deck, or is that too much? I know this would offset the timing a little, but if the block can be decked down this might solve the problem. Has anybody ever decked a block this far, probably not since the 1g/2g piston would be hanging out if someone did. Tell me what you guys think!!

 

[94awdcoupe]

So then, i have heard of many people decking quite a bit it material off these blocks, would it be possible to mill .050-.060 off the deck, or is that too much? I know this would offset the timing a little, but if the block can be decked down this might solve the problem. Has anybody ever decked a block this far, probably not since the 1g/2g piston would be hanging out if someone did. Tell me what you guys think!!

If you reread this thread you will realize there is no problem that needs to be corrected. The evo 8 abandoned the quench theory when they made the evo 8 pistons. The evo 8 engine is utterly fantastic at making big pump gas power and running high boost even on small turbos. So you have to ask yourself if mitsu knew what they were doing when they lowered the deck height. If you look at pictures of evo engines with the head off you will see excellent burn patterns on the top of pistons. there is no problem just dropping them in. with a 1g/2g head that has likely been shaved you will have a chamber nearly identical to late model evo 8. The pistons are extremely light compared to early pistons so that makes the rods much stronger. they also have oil cavity design. the underside of piston has a cavity cast into it. this is to improve cooling of piston by holding oil longer. if you are dumb and listening to people who say oil squirters are not important this feature of piston will not be relevant, to me it is another reason they are great pistons. keeping the piston cooler lowers detonation thresh hold.

started new thread on quench theory or lack there of
http://www.dsmtuners.com/forums/cylinder-head-short-block/336417-quench-theory-discussion.html

 

[mavisky]

Hmm, interesting read. I just installed evo 8 pistons into my 6 bolt so we'll see how that works out I suppose.

 

[zckry]

Hmm, interesting read. I just installed evo 8 pistons into my 6 bolt so we'll see how that works out I suppose.

Let us know, I thought this thread was saying you can only do it to 7-bolt blocks, I guess I just became confused

 

[mavisky]

Machine the 1g rod ends just like you would to fit a 2g piston and it'll work just fine.

 

[gixrman]

oh yes, its been a while since i've updated on here but the car has been done and running since 11/3/08... all I can say im pleased with it, It still needs a tune but hopefully i get to that sometime soon

All I can say is that it has worked for me also, and as I have stated before this might not be the best option for some but it was a viable (and cheap) one for me at the time.

 

[zckry]

Machine the 1g rod ends just like you would to fit a 2g piston and it'll work just fine.

Hmm, I might be doing this during the summer

 

[shredwin]

Hmm, I might be doing this during the summer

if you have a 7 bolt you wont have to machine anything so im just guessin you have a 6 bolt swap on yours

 

[zckry]

if you have a 7 bolt you wont have to machine anything so im just guessin you have a 6 bolt swap on yours

Yessur! My first DSM (2G GST) crankwalked on me and I vowed to never use a 7-bolt again after all that crap I had to go through.

 

[shredwin]

Yessur! My first DSM (2G GST) crankwalked on me and I vowed to never use a 7-bolt again after all that crap I had to go through.

yeah I was affraid of that too, but I guess it only happened on the 7 bolts with the one piece bearing. I did wanna build a 6 bolt but then I changed my mind.. Im ussing a 98 talon bottom end in mine, that one has the 3 piece thrust bearing... crankwalk has never happened to me so I wouldn't know what that feeling is like, im sure its depressing.

 

[mavisky]

BTW, car runs great so far. Still getting the tune dialed in, but pulls strong and spools quick

 

[DSMunknown]

I find it kind of funny that there are vendors out there selling these pistons (as a set) for several hundred dollars, and the rods for another couple hundred or so. Just picked up a complete set of Evo 9 crap for 100 bucks shipped. You just gotta know where to look.

 

[dsm-onster]

Tell me about it. I got my eagle/wiseco 700+ whp capable stuff for $700. . .

 

[just90gs]

what so great about the evo style bottom end?

 

[gixrman]

what so great about the evo style bottom end?

Slightly higher CR, rods are stronger than 1g, or 2g rods and piston skirts have anti-friction coating. Its just an alternative to going all out forged. I did honestly just to see if it would work.

 

[grimdsm]

i should be getting my Frankenstein motor back from dsm graveyard this week. i had them do the 7 bolt with 1g rods and evo pistons and bs removal

DSM Graveyard - Your #1 Source for Used DSM Parts!

the evo pistons are like $75 a piece. But for me was the best route because it was only a $100 upcharge on the frankenstien, where as the wiseco pistons were a $300 dollar upcharge

 

[jrohner]

For the price from them, you could just get wisecos. 75x4=300, and that doesn't include rings, and the rings are expensive. A set of pistons with rings from them is $480, that's insane. Wiseco's are only like 420, and they include rings.

 

[dsm-onster]

^^^ That's rediculous. Definately worth getting the wisecos. You can get higher compression or lower compression if you want, too. Nevermind the fact that they can handle more power.

 

[just90gs]

^^^ That's rediculous. Definately worth getting the wisecos. You can get higher compression or lower compression if you want, too. Nevermind the fact that they can handle more power.

Yeah I think I would do the same. Just to know hey if I wanna push +550 hp I will not have any issue's ya know.

 

[4G GSX]

So, This also works with the 7-bolt motors as well. if thats the case, I am sure we could use the AMS Evo 8-9 Stroker kit, the only issue is the block facing the opposite way so that means we have to face the pistons towards the back of the block since the evo flipped the block correct?

 

[ove_98 TSI]

i picked up some evo 9 pistons and rods for 150 shipped, fitted the rods with arps all for under 200$
it took me a very long time and a lot of reading to decide whether to install these with the dots facing the timing belt side, or the trans side. there were alot of mixed opinions out there. I went ahead ad installed them with the two dots facing the timing belt,i started the car up today for the first time and it is doing good with no unusual noises.

 

[Killa_dsm]

I was thinking about picking up a set of used evo pistons but my 6bolt needs .20 over pistons so it wouldn't really be a budget build if I have to buy new .20 evo pistons. But it would be great for anyone needing std pistons.

 

[dsm-onster]

i picked up some evo 9 pistons and rods for 150 shipped, fitted the rods with arps all for under 200$
it took me a very long time and a lot of reading to decide whether to install these with the dots facing the timing belt side, or the trans side. there were alot of mixed opinions out there. I went ahead ad installed them with the two dots facing the timing belt,i started the car up today for the first time and it is doing good with no unusual noises.

If you paid $150 for the rods/pistons and got the ARP rod bolts fitted for only $50 more, then you you didn't line hone the big end of the rods. Which is really neccesary when just changing oem rod bolts, much less using rod bolts that clamp at a higher force. The rod caps distort with different clamping forces.

. . .Or you got the line honing done for free. Most of us can't get that kind of deal.

Do the stock EVO 8 rods use the same weenie rod bolts as 2g 7bolt motors?