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DISCUSSION => Swaps, Turbos, Buildups => Topic started by: 318isteve on January 08, 2009, 01:04:45 AM

Title: evo pistons?
Post by: 318isteve on January 08, 2009, 01:04:45 AM

Hi there ive heard evo 6/7 pisonts will fit into a m42 with a bore to 86mm does anyone know more about this wether they will or not?
cheers :D

Title: evo pistons?
Post by: Froos on January 08, 2009, 04:27:44 AM

you mean the pistons out a Mitsubitsi Lancer (http://www.google.com/aclk?sa=L&ai=CkSWUqtNlSd_YHMWCjAfQu-nJBI-EqIMByZSi9wys8b3xDggAEAEgwa6mDFDp7Pfb-_____8BYJGMioXsF8gBAakCeTJRnt_Stj6qBBxP0KPiK3oPPoP5OnIKmphVEJyWV7dVwyEA2I57&sig=AGiWqtz1CrQdveVAL-Z4AE3Z3UcC_0jQZw&q=http://www.opgenoort.nl/Mitsubishi/nieuwe_modellen.html%3Fmerken%3D24) evo?? Try to make your question more clear.

Title: evo pistons?
Post by: nuvolarossa on January 08, 2009, 05:29:05 AM

the angle between valves is a bit different... if you read that in one of my old threads redo every calculation from the start for your safety :D
I gave up because I had no freetime at the time when I saw that valve angle was different. I need to find my old threads to remember the details... ;)
 
 
EDIT. Here is my old thread, but you need to know that some numbers are "guesstimated" like chamber volume and deck height:o
so start from zero or reply that thread if your able to make the calculations and not trust those numbers that CAN be wrong.
http://forums.bimmerforums.com/forum/showthread.php?t=903532

Title: evo pistons?
Post by: dsm2002 on January 08, 2009, 06:52:35 AM

I noticed in passing another possible candidate i.e. Toyota 3S-GTE DOHC 16v. I am not sure if this has been considered or not. Just throwing it out there.

Details from ACL (http://www.aclperformance.com.au/Toyota3SGTEForgedPistons.htm) are:
Bore Size:           86mm/3.386in
Compression Height     34.9mm/1.375in
Piston Crown Capacity     9cc Dish
Bowl Depth        3.41mm/0.134in
Piston Mass        362 grams         
Pin Mass          91 grams
Pin Diameter       22mm/0.866in
Pin Locking Device      Spiral Lock

(http://www.aclperformance.com.au/images/pistons/Toyota%203SGTE%20-%204MKRY9630.jpg)

Title: evo pistons?
Post by: nuvolarossa on January 08, 2009, 07:47:13 AM

Yes, I considered them but I wrote nothing and I don't remember why!
There was another candidate too but I don't remeber it now... :( need to recheck the files in my hard-disk!

Title: evo pistons?
Post by: Schwarz_Bomber on January 08, 2009, 09:07:12 AM

i am interested on this. i mean, is there anything out there that is a direct swap compatible? ex: direct piston swap with pistons from another car reguardless of make, that would help with boost.

Title: evo pistons?
Post by: 318isteve on January 18, 2009, 01:02:51 AM

yes mistubuishi ebolution sorry.
oh ok i dee looks like to much work,
anyone else know of the 3s-gte pistons being used or compatable?

Title: evo pistons?
Post by: E36Al on February 23, 2009, 12:31:01 AM

Nissan sr20 pistons are 86mm bore and 22mm gudgeon, have similar compression height to m42 and are very strong and cheap. The 3sgte comp height is too tall. you'd need a 4mm head gasket. The sr pistons need flycuts for valve relief. They have a 5cc dish before flycutting and afterward with a 1.7mm headgasket my engine is 8.6:1 static comp with m42 conrods. Cost me $50 aud for four s/h sr20 s15 silvia pistons and rods. cant use rods though b/e too large. Cheers Al