Author Topic: What all is nessary for s52 pistons? (Read 5669 times)

nickmpower · « **on:** July 30, 2006, 01:33:38 PM »

is there anyone here that has actaully put s52 pistons in there motor or at least knows what all it nessary? boring of course and the compression seems like it may be a little to high? also what is required for it to fit on the con rods? and what headgasket should be used? maybe machining wont be nessary with a thicker one? tia

dino245 · « **Reply #1 on:** July 30, 2006, 08:18:06 PM »

My self and 2002 maniac are doing this as we speak but nothing is finished so nothing can be confirmed of denied. we will keep you up to date as progress is made.

2002maniac · « **Reply #2 on:** July 30, 2006, 10:19:39 PM »

I will do a full writeup when we are finished, but here is how it looks for now.

The wrist pin sits .3mm higher which drops the piston in the bore the same amount. This isnt much, however the S52 piston dish is much bigger than the M42 so the compression would be way low. If you want to run boost, just get the block bored to 3.400" put the pistons in with stock rods and crank and have fun. Compression ratio would be ~8.9:1

What Dino and I are doing is using the M44 crank and machining the pistons for clearance. I'll be taking 2.5mm off the top of the piston and milling new valve reliefs.

The target is 10.5:1 with almost 2.0 of displacement.

I need to hurry and get these pistons done since I just put in my 2 weeks notice at work :eek: it's going to suck not having access to cool tools, but I really have to go back to school :mad:

The small ends of the rods are exactly the same between S52 and M42.

nickmpower · « **Reply #3 on:** July 30, 2006, 10:48:00 PM »

well i was thinking of eventually installing a DASC, so there is no way i would want 8.9 compression for that. I dunno if i want to deal with a turbo it just seems like so much of a hassle.

maybe i will just do what you are doing, then if i want more power dasc? maybe i will send you some pistons plus a few bucks and the machining cost and you machinest could do mine since he would know what he was doing? also i saw you got a crank from bavarian auto recylcing, how much did it run you?

thanks

StreetSpec_iS · « **Reply #4 on:** July 30, 2006, 11:30:24 PM »

Quote from: nickmpower

well i was thinking of eventually installing a DASC, so there is no way i would want 8.9 compression for that.

why not?

run 8.9 comp, and then safely run the dasc with an 11lb pulley? or greater.

asubimmer · « **Reply #5 on:** July 30, 2006, 11:49:32 PM »

Quote from: 2002maniac

IIf you want to run boost, just get the block bored to 3.400" put the pistons in with stock rods and crank and have fun. Compression ratio would be ~8.9:1

so you are saying the s52 piston will fit on the m53 rods? or do you use the s52 pistons and rods?

2002maniac · « **Reply #6 on:** July 31, 2006, 05:14:17 PM »

Quote from: nickmpower

maybe i will just do what you are doing, then if i want more power dasc? maybe i will send you some pistons plus a few bucks and the machining cost and you machinest could do mine since he would know what he was doing? also i saw you got a crank from bavarian auto recylcing, how much did it run you?

thanks

My last day is Aug 11th...

The crank was $150 + shipping. Talk to nelson.

2002maniac · « **Reply #7 on:** July 31, 2006, 05:15:12 PM »

Quote from: asubimmer

so you are saying the s52 piston will fit on the m53 rods? or do you use the s52 pistons and rods?

m53 wha?

M42 rods will work fine.

nickmpower · « **Reply #8 on:** July 31, 2006, 05:43:40 PM »

Quote from: 2002maniac

My last day is Aug 11th...

The crank was $150 + shipping. Talk to nelson.

so i would have to have the pistons to you by then or??? how much is the guy charging you if you know?

Im going to try to get a guy that bought an m44 off ebay for $1 to sell me the crank because he doesnt need it. It has 163k. should i plan on haveing that machined?

2002maniac · « **Reply #9 on:** July 31, 2006, 05:48:40 PM »

I am the machinist. I would need the pistons by this friday. After that i wouldnt have time.

nickmpower · « **Reply #10 on:** July 31, 2006, 06:09:08 PM »

o well thats cool you are doing it yourself. I'll let you know if i somehow find some by then

asubimmer · « **Reply #11 on:** July 31, 2006, 09:38:30 PM »

lol I ment s52 not m53

haha I guess I better only type when I am sober, ohh well

nickmpower · « **Reply #12 on:** July 31, 2006, 10:38:35 PM »

pm'ed you 2002maniac