ZMONSTER!

iTrader: (9)

So to flycut for 2.02 and 1.60 valves you should use cutter-valves in approximately 2.06+ and 1.64+? What size valves should be used if flycutting in this method?

Beaflag VonRathburg

iTrader: (176)

^ I think you just answered your own question.

I've seen people mention this before and they've always gotten flamed for it. I give you kudos for illustrating that it works.

ZMONSTER!

iTrader: (9)

I guess I did, but would a 2.08 valve be too big on ls1 pistons

346ci

Reall cool write up, thanks for sharing

LS1Formulation

iTrader: (13)

A 2.08 valve wouldn't be too big, I had a set of LS6 heads with 2.08 valves. A 2.08 valve would be a good choice to cut a relief for a 2.05 valve. On my car, we just used the stock size valves and ended up going in and hand finishing them with some sandpaper and a small grinding stone because of what Predator-Z said - I wanted to make damn sure there was no chance the valves would hang up in a valve float situation.

nocooler

iTrader: (5)

Smoothing them out will help from creating a hot spot as well.

Shoot me a PM when you go to the track - I'm interested to see how it runs.

RsSean

iTrader: (27)

That is really neat that you thought of that. Good job.

ZMONSTER!

iTrader: (9)

Cool deal, Im going to pick up a 2.055 and 1.60 valve so I can do this finally. Thanks for the write up!

85Iroc

iTrader: (12)

I finally got around to doing this over the past weekend. Worked like a charm. TEA threw in an old 2.04 valve they had lying around when I had them do a VJ on my heads and I used that. I only cut the intakes .040

Thanks for the tip.

One question..... how smooth do the reliefs really nead to be??

DeanJ

iTrader: (6)

Everybody covered what to look out for. All I can say is Good job, on the work and saving $$$. Dean.

NemeSS

iTrader: (127)

take few minutes to sand em or file down the sharp edges. leave a bullnose finish on the sharp edges. as smooth as possible

Soul TKR

iTrader: (4)

Got bored, and didn't take long... ENJOY lol

NWS

http://www.seatstaysup.com/forums/sh...postcount=1532

daftdrifting

I turned a over sized valve into a cutter with a couple cut off disc's and a sharpened it. it cuts nice valve reliefs.

NemeSS

iTrader: (127)

i made same thing, but this version more practical. imo
i for one will never buy a fly cuting tool again. just over sized valves and sandpaper

M1T/A

iTrader: (2)

great info

GeorgeInNePa

Good info...

hcb1700

iTrader: (9)

Has anybody ever had any problem with the little sandisk slipping off, or do they hold tight?

LS6

very informative thread

Paint_It_Black

iTrader: (1)

It's a bit tougher with the engine in the car, had to go pick up a right angle drill.

chrs1313

iTrader: (24)

would an air rachet work too...some much easier with the engine out...