erikthegoalie

iTrader: (29)

Does the above sound like a nice set up? NO flycutting with the stage 1.5, and a nice bump in compression because of the smaller chamber. (I have stock gaskets)

I will also add the 90/90...

what do ya'll think?

Thanks
Erik

JRracing

iTrader: (35)

You may have to cut a little with those heads.

Call Texas Speed. They will be glad to help you as well.

PREDATOR-Z

I would go for the stage 1 243 LS2/LS6 castings.

N4cer

iTrader: (11)

Agreed. Why lose PTV clearance so much with 5.3L heads, when you can just mill the LS6 heads?
After asking that, it might be worth it to do a good flycut and run those 5.3L heads. I'm sure the intake runners are killer. They have a lot to work with, and they've only increased them to 220cc. Pretty nice.

NHRAFORMULA00

iTrader: (2)

i orderded the stage 2.5 with 2.02 valves on their recomendation,TSP .085 intake,.095 exhaust clearance on a 113cl.i am thinking about the 90/90 also,i just have too many other things i want to do to the car this year.

erikthegoalie

iTrader: (29)

yeah I was told the 2.02 valve will clear...but NOT the 2.04 valve...


Doesnt that make it a stage 1.5 again though??

confusing..
Erik

N4cer

iTrader: (11)

Sounds about right. I assume that's measured on your motor, since the loose clearances in these cars vary from motor to motor.

erikthegoalie

iTrader: (29)

no i have not measured that on my motor...i was told that by TSP...
someone mentioned above just to mill some ls6 heads and have better PTV clearance overall...please elaborate...
I want to bump compression for a little more power...

N4cer

iTrader: (11)

I'm sorry. We posted too close to each other, and I should've quoted. I've fixed it now.

5.3L heads have less PTV clearance than LS6 heads. But TSP usually sinks their valves, probably making them pretty close actually.

erikthegoalie

iTrader: (29)

so do you think they will fit an MS3?

N4cer

iTrader: (11)

I dunno man. What's the duration of an MS3 anyway? 236/239 or something?
I say flycut so you can have maximum compression regardless of what head you run, unless you buy some stupidly expensive heads like ETP or TFS. Flycutting is simple, and I'll bet TSP can rent you the tool. If I were closer, I'd loan you mine.

chris93266

iTrader: (5)

ms3 is 237/242

N4cer

iTrader: (11)

I'd decide what DCR you want, and then do whatever it takes to make your h/c setup meet that goal.

NHRAFORMULA00

iTrader: (2)

The stage 1.5 have smaller exhaust valves(STOCK)-,thats probably why they are 100$ cheaper than the stage 2.5, thats the only difference that i could find. You could always order a cam with a different cl. for more clearance.Give them a phone call,they always pick up or else there on the phone with someone else.

ls2 bait

iTrader: (11)

why? the 5.3's have smaller chambers for more compression and flow very similar. if you milled the ls6 to the same size chamber wouldnt ptv be pretty similar then?

erikthegoalie

iTrader: (29)

if i go 5.3 stage 1's....how much power am I leaving on the table by not going larger valves??

by the way, i know this isnt the right way to do things...BUT, the MS3 is in, and I do not want to change it...
lets go from there..

01 BERGER CAMARO SS

iTrader: (77)

I have the new 5.3 stage 2.5 heads with and MS3 and my cars goes through its rpms like a fat guy though a buffet line. I had TSP's stg 1 243 heads first and i wouldnt go back to them from my 5.3's

erikthegoalie

iTrader: (29)

wow thats some nice info...flycut?? i believe so right?

Erik

Oh4GTO

iTrader: (46)

I currently rn the TSP stg 1 243s with an MS4. The 237 cc runners on those heads are way too large for our cubes. I did not get the power I was expecting from my setup and I and Formato believe its the large runners. I would have gone the 5.3 route but I do not know how to flycut and really didnt have the money to apy somone for it.

erikthegoalie

iTrader: (29)

I am sorry to hear that you did not like the runner size....
I was told that the MS3 which I Have will fit under a set of 2.5 5.3's w/o flycutting as long as the stock gaskets are used....

HOw can you check for PTV again? I am going to anyway for the hell of it...
Thanks