NassyVette

iTrader: (22)

Ok, heres the new combo. All you gurus out there check out my numbers and let me know if you see anything funny. If not, this is the final combo.

Just got my TEA 5.3 stage 1.5 heads in, milled to 60cc with 2.02 ferrea intake valves and stock 1.550 exhaust valves. The cam is a torquer v2 on a 112 lsa + 4 with an andjustable chain bringing the icl to 108. Plugged the info into pianoprodigy's calculate and got the following numbers....

Intake Duration: @.006=281 / @.050=232 / @.200=153
Exhaust Duration: @.006=283 / @.050=234 / @.200=155
LSA:112
ICL: 108
Overlap: @.006=58 / @.050=9 / @.200=-70

Bore: 3.898 (98 block)
Stroke: 3.622
Rod Length: 6.098
# Cylinders: 8
Deck Height: -.006
Piston Dish: 1.0 (added volume per cylinder since I'll be flycutting)
Compressed Gasket Thickness: .040
Head Volume: 60cc

SCR: 11.47:1
DCR: 8.84:1
Rod to Stroke: 1.68:1
Bore to Stroek: 1.08:1

Quench Area: .034 (.040 -.006)

***.006 / .050 / .200
IVO: 32.5 / 8 / -31.5 (BTDC - means ATDC)
IVC: 68.5 / 44 / 4.5 ABDC
EVO: 77.5 / 53 / 13.5
EVC: 25.5 / 1 / -38.5
ECL: 116 / 116 / 116

So given the data above, is it possible to tell about how much needs to be flycut from the stock pistons?

PBMFIsMe

iTrader: (5)

Obviously this is just a guess, but I'm not sure you'd need to flycut with that setup. At least not with the 2.02 valves. 2.04's MAY have been an issue.

Do you know how many thousands the heads were milled?

Always need to check to be safe, but I'd bet you'll be fine.

Assman

iTrader: (2)

Damian

iTrader: (89)

A 60cc TEA 5.3 head should not need flycutting with that cam. That means the heads have been milled ~.015, and should provide enough clearance even on the 108 ICL. It'll be tight, but should clear.

NassyVette

iTrader: (22)

Bob at TEA said anything over 230 duration is pushing it and that I should flycut to be safe. I planned on fly cutting from the get go, so its not a problem for me. I guess I'll do a clay test before hand and see if I have adequate clearance before a start flycutting. Anyone that wants to comment on the combo in general please do... I'm open to hearing ur opinions. More compression maybe? Less advance? Etc...

crazylane

iTrader: (19)

Yeah I second this. I talked to him about some heads I was going to use. They were the same thing except mine were at 62cc. The cam I am using is a 230/232 .615/.595 XFI/XE-R on a 111+2. They said I WILL NEED TO fly cut. I talked to Mike@TEA.

Tri5Nerd

iTrader: (3)

I have almost the same setup as you, except for the heads and valves. I'm running 2.04" valves and I had to flycut.
I took ~2.5 CC off which is a nickel size thickness flycut, .060>.070

ls2 bait

iTrader: (11)

i will gaurentee u will need to fly cut. my tv2 on a 112+0 made contact with my pistons with .045 gaskets and stock ptv.

firefighter813x

iTrader: (6)

This post is a little old, but... I just spoke with TEA about the 5.3's with my MTI X1 cam (230/227) and he said it would be tight (PTV clearance) They suggested their stage 2 LS6 heads...

LS1C5Vette

iTrader: (11)

Bumping this thread, do any of you know if I will be ok milling these heads to 62cc and run my 233/239 cam safely? What about the stock chamber size of 63.5-64cc?