sujomatt

iTrader: (7)

99 Camaro Z28
Stock bottom LS1
TRex v2 Cam (242/248 - .608/.612 - 110 lsa)
Patriot Stage 2 5.3L Heads
Hardeneded 7.4 pushrods
LS7 Lifters, etc etc..

Do you think I will run into any issues with the Piston to Valve clearance??

Is this easy to measure? On Heads on, etc?

Thx in advance!

Paint_It_Black

iTrader: (1)

Yes, you'll be fly cutting that combo. No doubt about it. Cutting .080 would probably be safe.

sujomatt

iTrader: (7)

Even tho the chamber is 63cc?

bww3588

iTrader: (49)

only way is to measure. according to TSP, the MS4 can be ran with stock heads and pistons etc...however the duration is more with the TREX, so PTV might be more of a concern.

measure twice, cut once.

Sales2@Texas-speed

iTrader: (5)

Last Trex we had come through here the customer ordered our stage 2.5 5.3's...we set them up for the best possible PtoV (premium cores that only need milled .003" and recessing valves slightly)....we typically lose less than .010" on the valve drop compared to stock when we do this. It was WAAAYY too tight for our comfort still! not knowing how they set their heads up......I'd flycut FOR SURE!

sujomatt

iTrader: (7)

I am not very familiar with Flycutting... is it easy to do with the heads off? b/c they already are... the less work the better - bought these heads not realizing ill probably need it... huge fail on my part.

bww3588

iTrader: (49)

the heads come on and off during flycutting. in fact, each head goes on and off 8 times if done right. however, it does not have to be torqued or anything like that, just set on and tightned down with a few bolts. or....if you want to pull the pistons and rods out, you can take it to a machine shop and they can do it with a mill.

sujomatt

iTrader: (7)

Yea... So, with that said, I think I may just upgrade the pistons to something with higher compression.

Recommendations?

Paint_It_Black

iTrader: (1)

You don't use pistons to increase compression.. unless you run a dome, which is stupid in an ls street engine. You gain compression by milling the heads and running a thinner gasket.

So let me get this straight, you would rather pull the engine, buy new pistons, have them assembled, possibly balance the rotating assembly, new rings, a block hone, new bearings and hardware, reinstall EVERYTHING.. rather than rent a fly cutting tool for 50-60 bucks, and spend 2 hours cutting the pistons, which can be done with the engine in the car? That sounds crazy!

sujomatt

iTrader: (7)

Sorry that was my Honda experiences showing through hahaha

I guess I'll just take extra time doing the flycutting

SOMbitch

iTrader: (8)

Seach the Lindy tool. A bunch of flycutting threads on here too if you search. I think chrs1313 has one he rents out on here.....

garygnu

get a custom cam that will fit with out fly cutting.

sujomatt

iTrader: (7)

well that would be just dandy if i didnt have the cam in my garage already lol

chrs1313

iTrader: (24)

I have the Lindy tool it works great...I pulled my engine to cut but others have had luck doing it in the car...just takes a hair longer...shoot me a pm when/ if you want to rent the tool...

I have intake (good for up to 2.04") and exhaust (good for up to 1.58")...

also I would not build another h/c/i lsx without flycutting the gains in running a bigger cam, higher compression out weigh the added extra couple hours by far...

if you flycut you will be able to run a thinner gasket and or mill the heads to bump the compression even more

sujomatt

iTrader: (7)

Would a better choice (no fly cutting) with great power be the MS4 cam? I can probably easily sell the cam instead and save some cash that way and the hassle

Sales2@Texas-speed

iTrader: (5)

You can measure the valve drop (how far the valve travels from its seat to the deck surface or table top) and that would give us the info needed to make that decision...but again, with the limited knowledge I have about the way they configure their heads, I'd bet against it clearing without flycutting!

00MaroonZ28

iTrader: (3)

Just stick to what you've got right now. Flycutting isn't a big deal. It's pretty easy.

sujomatt

iTrader: (7)

Yea Ill cowboy up n measure clearances with my buddy once the heads come in (probably this weekend) and stop worrying right now about this lol

00MaroonZ28

iTrader: (3)

That combo will net you some pretty good power N/A.