mr chevy

Im builting a lq4 0.30 forged pistons
317's or l92's
Victor jr. Rpm
Custom grind cam
I wanna do a 418 w/ the 4.100 crank and my forged pistons but im not sure if i can use the stock rods or not w/ the arp bolts and will my setup be a 418 w/ 0.30 because im hearing i need custom pistons

1badeagle

iTrader: (9)

I'm 99.9% sure you will need a 6.125 rod. Why not spend 500$ and have piece of mind.

mr chevy

I cant use the stock ones ?

1badeagle

iTrader: (9)

Stock rods are shorter. The new crank is going to pull the piston down in the bore farther and up farther on the upstroke. I don't think anything is reused in a stroker build. I could be wrong, but I'm 99.9% sure I'm right. Someone else will chime in soon enough.

ZONES89RS

iTrader: (25)

Would be unwise to use stock rods at any point that pistons and crank is replaced, you basically leave a weak link.

1badeagle

iTrader: (9)

Aftermarket rods will have upgraded rod bolts as well.

mr chevy

Whats up 89rs ...your the reason im in this mese lol

mr chevy

Alright im just asking so ...do i need custom pistons

1badeagle

iTrader: (9)

It will depend which head you use. That will decide your pistons.

mr chevy

317 or l92

1badeagle

iTrader: (9)

I know, there is a huge difference in those two heads. The l92 has a far larger valve, so it needs a bigger valve relief in the piston.

ZONES89RS

iTrader: (25)

So many options, just do a 408 with l92s and be done with it. Lol

mr chevy

@ 89rs i jus mite but for the l92's do i need to fly cutt the pistons

jgillen91

iTrader: (1)

Is your building 408 with l92 heads and not wanting to flycutt pistons I would buy these forged pistons. 030 over for a 6.125 rod. They have extra wide valve reliefs fir the bigger l92 valves. Cheap as well I got a set of. 030 forged pistons that fit the floating ls2 rod for 520.00 bucks shipped.

http://www.racetecpistons.com/at_products/index.htm

jgillen91

iTrader: (1)

Flatlander racing can get them alot cheaper than buying directly from racetec

mr chevy

i already brought these and im not trying to buy anymore

Prorac1

iTrader: (4)

What are those pistons?

mr chevy

Probes

99 Blue Bird

iTrader: (3)

y would you buy pistons if you dont even know what your gonna build with them. try and return those. they look like stock lq4 pistons. and im sure the poster that asked what pistons they are was asking for the bore size/ stroke / rod size they even require to work. you obviously cant use a stock rod if the piston were to call for a longer length. and you cant use a piston that called for a 4" or 3.622" stroke if you want to use it in a build using a 4.1" stroke.

mr chevy

I knew what I was building a 370 at first ...the pistons not stock look harder don't know everything but im not stupid