NX_CaGEdApE00

iTrader: (7)

I am currently running the Trex and comp 921s in my car... I am purchasing a set of Patriot LS6 stage IIIs from a member on here and had a few questions... they are 64cc down to 59ccs... 2.08 1.60s.....

Will i need to flycut the pistons to make this setup work if so how much.. and what head gaskets do i need to run as well as head bolts or studs..

thanks
david

Asmodeus

did you just ask if you need to flycut stock pistons with a t-rex, 59cc heads with 2.08 valves?

and are you still running a 3.9 bore? that might be too much valve..

THENASCAR

iTrader: (19)

ur running the trex with 921s? i was under the impression those couldnt handle that type of abuse. ne who u will definatly need to flycutt for that kind of milling and the machine shop will need ur entire short block to check it. also i would reccomend arp everything on the bolts and u could run cometic gaskets. maybe a .040 gasket would ok i guess. or u could stack 2 of them. i would ask the engine builder.

NX_CaGEdApE00

iTrader: (7)

can i not flycut the pistons myself?????? im new to this heads thing.... and yes it is a stock 346.....stock bore.......... i need info before i make this purchase.

thanks

SOMbitch

iTrader: (8)

If you can pull the heads you can flycut. Do a search on here and you will learn all you need and then rent or borrow a tool from somebody on here.

NX_CaGEdApE00

iTrader: (7)

Thats what i thought but they were mentioning me needing to take it to the machine shop etc...... my only question is how do i know how much to flycut??? and as far as the gaskets go what will it change running 2 instead of one... what does everyone think...

anyone

thanks

sciff5

iTrader: (1)

I was gonna buy the same heads.. but read many places on here that stage 3 heads are NOT meant for a 3.9 bore.


I am not really sure why I couldent use the stage 3 heads wont work on a stock 346. Just wanted you to know cause I was looking at the same heads

NX_CaGEdApE00

iTrader: (7)

i dont know why they would not work on a stock bore.... maybe a little over kill.... i dunno...... help.......

5.3LJimmy

iTrader: (10)

Because the valves are too big on stage 3 heads. They are intended for 4" bore or larger.

SOMbitch

iTrader: (8)

^^^^And the intake runners are usually hogged out.

BADSZ28

iTrader: (39)

Yeah, even if the valve misses the bore in the block, you would still have major valve shrouding issues hindering flow. But yeah, any factory head that has been decked would not clear the pistons without flycutting with that cam.

PREDATOR-Z

Flycut 2cc
.080 intake and exhaust but it has to be done with a bit bigger than a 2.08 valve seat size. Be careful with that. Like 2.100 at least

IMO, just my 2 cents get a set of stage 1 (stock valved) LS6 (243) castings, ported and had finished. No flycut involved and a healthy 30rwhp for less than a Grand.

Gunnar@Patriot

iTrader: (20)

We do not suggest the stage III on a stock bore because of the valve shrouding. The intake runner size will depend on how old the heads are. Like Predator said, for $1095.00 we can do a set of brand new CNC ported 243's with oem (non-sodium) valves and Patriot Gold springs.

BADSZ28

iTrader: (39)

About how much can be gained for these with T-Rex over cam only? What length push rods needed?