SPYDERGSTTUNER
15+ Year Contributor
- 174
- 0
- Feb 19, 2011
-
Rifle,
Colorado
Ok so as some of you may know my stroker blew up a while back and i made a few threads asking for advice on what internals to use. After a few debates on selling the dsm, keeping her fwd, going stroker, 6 or 7 bolt etc. i finally decided to keep her, convert to awd, stay 2.0 and go with a 6 bolt block with a 7 bolt head. I have a bunch of spare parts of years of hoarding to be able to build 2-3 long blocks 
. So the time has come for a rebuild. I looked through my stash of parts and what do you know i end up finding some Manley and Scat rods both bnib. I heard good and bad things about both brands but i think im gonna use the Manleys, I also bought a set of JE Assymetrical pistons which is where my dilemma begins. The pistons are an awesome piece, the machining is flawless and quality as always is top notch. Now, ive read in a few threads that JE's are known for piston slap but those threads are about 7 years old and i havent come across many if any new threads of anyone using the assymetrical slugs. So, i have a few questions to ask hopefully someone thats used/uses them can chime in on this:
JE pistons are 2618 with low silica so they will shrink and expand making them noisy on startup just like any 2618 piston will, but JE's recommendation is .0040 ptw. Does that sound right? I know the full round design requires a minimun of .0035 ptw but my machinist says they recommend those based on stock power levels. So is .0040 too tight if im aiming for 600+ awd hp?
I also read in a supra forum that assymetrical pistons arent a good idea for street use but the guy never explains why, is this true?
And laslty these pistons only weight 312 grams which is the lightest i have found besides the Mahles but those are 4032 and i had a bad experience with Mahles before, so this leads to my next question: i know the lighter the rotating assembly is the better for high and easy revs so my machinist suggests i use the ACL Race series berings since they are intended for better oiling at high rpms. He claims if i would have used heavier pistons he would have suggested a different bearing but with the light assembly those should be ok. But i read here in the forums that those bearings are too hard and may screw the crank up if the oil isnt changed very regularly. So what bearings do ya'll suggest for main and rods? ACL, King? Maybe Clevite?
By the way its a standard 6 bolt uncut, full weight polished crank. The Manleys are standard length 150mm with 22mm wristpins. The pistons are .020 8:5 if it matters. Thanx in advance
. So the time has come for a rebuild. I looked through my stash of parts and what do you know i end up finding some Manley and Scat rods both bnib. I heard good and bad things about both brands but i think im gonna use the Manleys, I also bought a set of JE Assymetrical pistons which is where my dilemma begins. The pistons are an awesome piece, the machining is flawless and quality as always is top notch. Now, ive read in a few threads that JE's are known for piston slap but those threads are about 7 years old and i havent come across many if any new threads of anyone using the assymetrical slugs. So, i have a few questions to ask hopefully someone thats used/uses them can chime in on this:JE pistons are 2618 with low silica so they will shrink and expand making them noisy on startup just like any 2618 piston will, but JE's recommendation is .0040 ptw. Does that sound right? I know the full round design requires a minimun of .0035 ptw but my machinist says they recommend those based on stock power levels. So is .0040 too tight if im aiming for 600+ awd hp?
I also read in a supra forum that assymetrical pistons arent a good idea for street use but the guy never explains why, is this true?
And laslty these pistons only weight 312 grams which is the lightest i have found besides the Mahles but those are 4032 and i had a bad experience with Mahles before, so this leads to my next question: i know the lighter the rotating assembly is the better for high and easy revs so my machinist suggests i use the ACL Race series berings since they are intended for better oiling at high rpms. He claims if i would have used heavier pistons he would have suggested a different bearing but with the light assembly those should be ok. But i read here in the forums that those bearings are too hard and may screw the crank up if the oil isnt changed very regularly. So what bearings do ya'll suggest for main and rods? ACL, King? Maybe Clevite?
By the way its a standard 6 bolt uncut, full weight polished crank. The Manleys are standard length 150mm with 22mm wristpins. The pistons are .020 8:5 if it matters. Thanx in advance
