2camaros6702

iTrader: (2)

I want to run the MS4 cam with the PRC 5.3 stage 2.5 heads and I don't want to fly cut my stock pistons. Is it possible and how???

scidav87

iTrader: (16)

i would get ahold of Texas Speed (your best bet) conserdering they make the 2. However, i believe they have to machine the the heads for that cam.

Z28/2002

iTrader: (27)

Call TSP

LS1C5Vette

iTrader: (11)

I am pretty sure you will have to flycut with those heads, I know you wont with the stg 1.0 ls6 heads

5_02ls1

iTrader: (20)

just call em up they should be able to sink the valves a lil deeper for ptv clearance...

DVS99TRANS

iTrader: (7)

+1 they will make the heads for the cam. call them and ask them about it.

2camaros6702

iTrader: (2)

I already have the heads. I have a TSP 233/239 602/605 with stock heads in the car now should I just stay with the cam I have and do you think it will work well with the PRC heads?

chrs1313

iTrader: (24)

it will work with the ms3 but you have to tell them to recess the valves in the 5.3s

SOMbitch

iTrader: (8)

And you lose a little flow doing that. I have asked how much on here but never got an answer. I would get a smaller cam that will clear if you don't wanna FC.

I wish I had milled and FC now for better DCR.

ls1pwrdss

iTrader: (74)

you have to fly cut ive installed 2 sets of this combo you have to defently fly cut

INMY01TA

iTrader: (1)

I'd stay with the cam you got or go MS4 cam only.

Sammyboy

iTrader: (9)

MS4 stage 1 LS6......no flycutting, basically a bolt-on

bjamick

iTrader: (31)

And what kind of power did this setup make say @ 5600rpm and up?

Jason 98 TA

iTrader: (4)

Defiantely requires either the stage 1 ls6 or cutting the pistons for the 5.3l heads. Our new PRC casting should be ready very soon & it'll have some clearance for either of those camshafts though!!!

JASON 77

iTrader: (22)

more details?

Paint_It_Black

iTrader: (1)

How will the flow numbers change by recessing the valves?

Paint_It_Black

iTrader: (1)

bump, looking for an answer

SOMbitch

iTrader: (8)

Me too PIB and I have asked this ?? a couple times on here with no response from TSP. Kinda curioous

How about it Jason??

2camaros6702

iTrader: (2)

I am going to stay with the cam I have now (TSP 233/239 602/605) and the PRC 5.3 stage 2.5s. I am hopping for 440-450 RWHP through a FTI-4000 stall. We will see.

9000th01ss

iTrader: (10)

Less open area. Think about it, you machine the valve seat deeper into the head. The valve sits higher up (away from the piston) so theres more clearance when it opens.
I can't imagine that, say you need .020 more ptv clearance so they sink the valve in the head that amount. Thats backyard IMO.

What also amazes me is what people do to not flycut/build an engine properly.