mikh338

iTrader: (16)

i know this is a very large cam and I cant seem to find any info on the PTV clearnence, I want to run the 5.3 stage 2.5 heads with my Trex cam. Will this combo work?

garygnu

call thunder racing .

Ronny_02_WS6

iTrader: (6)

I think those heads only offer till 63cc check with TSP also, i believe with that cam you should have 64cc or more, not sure though.

mikh338

iTrader: (16)

alright, yeah ill call thunder racing

camarodude87

iTrader: (8)

Yeah thunder never replied to my emails. I went with 243's ported by AI. made 480 to the wheels. If you get just the head job its a amazing deal, I sent off my fast 92 as well

NemeSS

iTrader: (127)

U will need to verify ptv with that cam no matter what. More than likely will need to cut valve relieves. Don't expect to just drop in as is

mikh338

iTrader: (16)

awesome numbers, stock cubes?

mikh338

iTrader: (16)

alright i will make sure to give them call and check before i do anything

camarodude87

iTrader: (8)

Yeah man stock cubes, and yes I did have to fly cut with my set up. Well worth it.

garygnu

I believe with TSP 5.3 heads TSP can sink the valves deeper into the valve seat to gain move PTV.I would degree and double check clearances with a cam like that.

mikh338

iTrader: (16)

i emailed them yesterday still no response

BrntWS6

iTrader: (7)

Call TSP, I'm sure they have dealt with that setup before. And they usually answer their phone.

camarodude87

iTrader: (8)

Believe me, Go with AI...

mikh338

iTrader: (16)

i cant spend $2k+ on heads

camarodude87

iTrader: (8)

find yourself a cheap pair of 243's and their best port job is only 995 http://www.advancedinduction.com/LSX...cGMLS2Head.php

mikh338

iTrader: (16)

i have oversized valves, comp 921 dual springs, titanium retainers, comp hardened pushrods and ls7 lifters. are those compatible with 243 heads?

Sales2@Texas-speed

iTrader: (5)

In my opinion, that cam is too big for a stock long-block AND for an engine with the Stage 2.5 5.3's. The few we've had come through here that we got the chance to check PtoV clearance were VERY tight. If it were mine, I'd only run an aftermarket casting that had better than stock valve-drop.

mikh338

iTrader: (16)

well my current setup is a forged LME 370 with trex cam all stock top end. what do you suggest for heads? i only was thinking of the 5.3 stage 2.5 heads since they are a good price and flow well. I really didnt want to spend a lot of money on heads but my choices may be limited.

Sales2@Texas-speed

iTrader: (5)

Aftermarket short-block changes everything! Most any aftermarket piston will have a valve relief in them so you can run much more aggressive combos with good clearance! Do you know the specs on those pistons or have the piston part number?

mikh338

iTrader: (16)

wiseco forged 4.030 pistons.