Who Wants A 3500 Forged Piston Group Buy

[farmerz24]

ok, im getting custom pistons made for my 3500 build, and am probably going to do something similar to what 89jy turbo did. so who would be interested? Probably going to go with wiseco unless anyone else has objections as i beleive thats what happened with the last group buy

specs would probably be .20 over, a bigger piston pin to accept the v8 or 4.3 eagle h beam rods (the 4.3 rod is a stock rod wich will work in our application as the crank pin bore is the same as the 3500 at 2.25. the rods may need to be narrowed if using this rod)

also, it would be a 5.7 rod length which would be .2 inch shorter than the 3500's 5.9. anyone see any disadvantages to this? my plan is to make up for this with a taller piston with thicker ring lands and more distance between the rings for a better boost piston.

what do you think, anyone intersted? this would probably go down by end of feb or march..

[Fiero11]

I'm using Wiseco in my 3.4, they made them completely custom $125 each. I had them make eight, one extra of left and right.

[Superdave]

Just an FYI. the 305 SBC uses a 3.736" bore and the 3500 uses a 3.7" bore...

http://store.summitracing.com/egnsearch.asp?SearchType=Engine&N=700+4294908216+4294840138+4294889107+4294891096+115+4294782086

[93ztwo4]

so are u running 305 pistons in ur 3500 dave? u got anymore details on these?

[MidnightriderZ24]

u would have to bore the 3500 just a tad... now what would u do for valve reliefs dave???

[Superdave]

so are u running 305 pistons in ur 3500 dave? u got anymore details on these?

Nope, i'm using the stock pistons and rods... If/when they break i'll look into something else...

The LS1/LS6 guys are pushing 400-500 HP with the powdered rods although they admit they are the weak link in the engine. Their advice was to keep the RPM's under 6500 and the rods should last..

u would have to bore the 3500 just a tad... now what would u do for valve reliefs dave???

the 305 ones have valve reliefs in them but you may have to get them cut to make room for the valves on our heads though. The Hyper pistons on summit are dished so they may work.

Possibly a great combo with those pistons, the 4.3 H beam rods and the 3500 crank...

and yes, you'd need to bore the 3500 out about .040" for them to fit.

[MidnightriderZ24]

if i was to put them in, i wouldnt use hyper, i would need forged

[Superdave]

Here are some more close matches for the 3500 's bore...


Caddy 4.6L North Star (93mm Bore)

F*rd 3.3 and 4.1L V6 have a 3.7" bore

Voltswagen Type 1 and 3 N/A have an aftermarket 94mm piston avaliable

the new F*rd "Cammer 5.0L" V8 also has a 94m Bore...


If anyone can find aftermarket pistons for the N* that's probably our best bet...

[rickykline]

i just emailed wiseco all the specs i have on hand

copy of the email.

i have a 05 3.5L v6 thats boosted i need custom pistons for it asap..
the engine bore is 3.7". the stock rod length is 5.9" im thinking of going with the 4.3L V6 rods which are 5.7" long with a .927" piston pin bore the crank has a 3.31" stroke.. deck hieght is 8.818".. the stock compression ratio is 9.8:1.. id like to drop that down a bit 8.8:1 to 9:1..looking to boost up to 20psi eventually.. combustion chamber cc'ed at 32cc.. the compressed head gasket was .063".. top ring would be 5/64 second ring would be 5/64 and the third 3/16... if you need anymore info please let me know.. forged pistons are a must.. and i was told yall made a set for a friend of mine for cheap.. thanks for your time

[farmerz24]

rickyline, let me know if you are intersetd in gettinga set cause i need a set for sure. i will go with you on this. total seal rings would be nice too!

only thing to watch out for is that the bottom of the piston will come .2 inches closer to the crank now, as long as it doesnt hit is cause of this we are good.!

[Joseph Upson]

One of the comments in GMs description of the 3900 was that the cylinder bores were offset to allow future increase in displacement, that being said perhaps you should focus more on that engine for it's maximum potential. It is already possible to increase it's displacement by offset grinding the crank and using the shorter 3400 down rods and custom pistons as well as boring it. You could probably get 4.3L out of that 60 degree block.

You can also offset grind the 3500 crank for 3400 rods and punch it out to make a ~3.8L. That's the beauty of the whole process getting as much as you can out of a small package, and using the steel crank still have equal to or possibly greater strength than the 3400 crank despite the increased stroke.

Heck you can get a small block chevy 464 now.