GC99TA

iTrader: (30)

Thats my fault man. I was so caught up in helping you out that I forgot your motor was an older LQ4 with press fit pins. The LY6 that I have (which GM replaced the LQ4 with) has full floating pins, which is why they'll work for me. Again, I'm real sorry for misleading you on this. But I would give Wiesco a call and see if they possibly do offer a similar piston that accepts the .945 press fit pin. They do make a piston for 3.903 bore with .945 pins, so it's probably worth a call.

Or (and this is a big OR) is it possible to have your LQ4 rods bushed? I don't know if it's cost effective, but I would certainly think it would be possible.

I also edited the pin size information in post 35 so it doesn't lead anyone else astray. .943 floating pins; .945 press fit.

NOVACRAZY2007

I think i'm going to buy a set of forged rods anyway.

GC99TA

iTrader: (30)

I guess at this point I can't say that I blame ya given your apparent lack of piston choices with the press fit pin rods. I'm glad GM came around on the bushed rods but hope that Wiesco or someone else will come around with some 4 inch pistons for the press fit crowd. There are so many of these LQ4's being built on a budget these days that it would only make good sense for them to support it with a stock rod capable piston.

Fbodyjunkie06

iTrader: (10)

lol thats funny as hell anthony I asked if you went to piedmont and the picture you have my neighbor is standing in it!!! The black guy with dreads is Mark he has the Helter Skelter 68' Camaro. I was thinking of a chevelle for some reason when you said nova.

Here's what I would do.

Take your block have it done .030 over forged rods and pistons super vic intake, 950 cfm carb, ls3 heads, ls3 valves, 247/263 112lsa cam ground on LSL lobes, and do some slight porting to your heads and maybe some bowl work if you can. That should net you a solid 500rwhp and an easy 600 crank horsepower on motor alone. Throw the gas on it and it should make the index your wanting to run at Piedmont.

Fbodyjunkie06

iTrader: (10)

Just realized that the super vic or vic jr won't work you can use a GM performance Parts single plane as they make one for rectangle ports and a 4150 flange.

$O$OE

iTrader: (14)

Same set up im running, Just a custom ground N20 Cam, and heads flow a bit more than stocks do.. Hopefully some good times next yr.

99 Blue Bird

iTrader: (3)

incorrect info. they do make a vic jr for the L92/ LS3 heads. they dont make a super vic for the L92/ LS3 heads. but for cathedral heads they make a super vic, vic jr, and a performer. holley also makes a tunnel ram style manifold for the L92/ LS3 heads but nothing for cathedral heads.

and op they do make forged press pin fit pistons for LQ4 motors with stock stroke and rods.
http://www.texas-speed.com/p-771-wis...22-stroke.aspx

for forged 6.125 rods
http://www.texas-speed.com/p-728-wis...22-stroke.aspx

and those are just some of the domed ones. there are flat tops too. and dished if you want to go the FI route

NOVACRAZY2007

Getting frustrated with l92 head. No one makes a dam dome piston. Why the hell not seems to be alot of people useing these heads.

speedtigger

iTrader: (16)

Talk to the guys at Mast Motorsports: http://www.mastmotorsports.com

Fbodyjunkie06

iTrader: (10)

Thanks for chiming in, I was talking a buddy the other day and I remember him saying back in 07 I think when he was building his 408 Edelbrock didn't make a single plane and the only one to go with was a GMPP single plane. Guess those have come out since then.

99 Blue Bird

iTrader: (3)

lol bro did you not click the links i added for the +12 dome piston? it accepts up to a 2.20 intake valve. and the L92/ LS3 head uses a 2.16 intake valve. if your absolutely stuck on using those heads than i would go 4.030 bore minimum and not a 4.005 bore.

NOVACRAZY2007

So they bolth will work with the ls3 head?

99 Blue Bird

iTrader: (3)

yes one is just for a stock rod and not as much compression and the other is for a aftermarket forged rod and more compression.

if you went 4.030 bore and stock stroke with the +12 domed piston, stock 70cc L92/ LS3 head and a stock GM MLS .051 gasket your compression ratio would be around 12.0:1

if you went 4.030 bore and stock stroke with the +4 domed piston, stock 70cc L92/ LS3 head and stock rods, with GM .051 gaskets your compression ratio would be around 10.89:1

now if you went 4.005 bore with either of those pistons and all other variables being the same as above your compression ratio would be slightly lower due to less cylinder pressure from the smaller bore size.

NOVACRAZY2007

Thanks i think i will go .030 over.

Fbodyjunkie06

iTrader: (10)

Hey Nova if you ever need any advice or a helping hand you know I'm local as well and I am pretty good with a wrench and have been working on these LS motors since I was 17 and I'm 23 now. Just throwing that out there if you ever need any help or advice.

NOVACRAZY2007

Here's my combo so far.

lq4 .030 over
cnc ls3 heads
wiseco 12cc domes. for 13.1 comp.
stock crank
scat rods.
have to get a custum cam ground, and havent decided on an intake yet. holley came out with new high rise i'm looking at. havent seen any test on it yet with a single carb. should be well over my 600hp mark

LongIsland63SS409

iTrader: (22)

Great info on this post since I'll be going basically the same route with
my LY6.

Any updates on your build?

Mike

NOVACRAZY2007

Posponed for now there's alot of events going on a zmax dragway this year. And i dont want to pull my other motor yet so i can go to them.

The stunningman

iTrader: (47)

Where did you price them? I'm finding high $600's to 800.00 for a set.

GC99TA

iTrader: (30)

I called Weisco directly because at the time I couldn't find any retailers listing them on the net....just Weisco's catalog.