speedracer5532

iTrader: (8)

Has anyone ran AFR 205 heads milled to 59 cc with .040 cometic gaskets and a G5X3 112 LSA cam without flycutting? I called LG Motorsports to look into renting their flycutting tool and was told that I don't need to flycut with that cam and 59cc AFR 205 heads.

2001 Pewter WS6

iTrader: (43)

If you called LG and that is what they said then you should be ok. They designed the cam so they would know for sure...

ThirdGenLS1

iTrader: (11)

sorry but i can't see you being able to do that with out flycutting. If they were unmilled and you were running a stock thinkness gasket then yea i would say it should clear.

I would call back and make sure they heard you right becuase that doesnt sound right.

2gofast

iTrader: (1)

Do a search for this. There is a very long thread where Lou himself comments (multiple times) on this exact discussion. It is very good reading for what you want to do.

allngn_c5

iTrader: (3)

In 2005 I had the g5x3 vI cam installed. That was with stock heads, and gaskets. My pistons were flycutt for some added safety. LSA was 114.

I hope this helps in some way.

Now to contradict myself, I remember talking to the guys and at one time the setup you talk about but on a 114 not 112 had to be cut, then after more measuring to check clearances it was decided that the clearance just barely eeked by what was considered to be safe to not flycutt.

Again the best way to be sure is to simply call LG Motorsports back and talk to Anthony. Anthony knows his stuff and will set you straight.

ThirdGenLS1

iTrader: (11)

its always best to check that way you know exactly what you got, every cam isn't ground exactly the same nor does the amount the piston comes out of the from engine to engine stay the same.

I can tell you that it wont clear with out cutting, but i would measure it to just to see hwo much you need to cut, or you can just call lg and ask them how much they general cut to clear that set up.

I'm sure the first person you talked to misunderstood what you were saying because there is no way that will clear with out cutting.

speedracer5532

iTrader: (8)

I was pretty sure this setup would require flycutting but was shocked when I called LG and they said that it didn't, this is why I made to post to ask people that has ran this setup. I talked to Tony Mamo and he agrees that flycutting definitely needs to be done. He says it might clear but leaves no margin for error if you miss a shift and over rev the engine.

JPH

iTrader: (2)

It clears by like .038 to .041 on the intake side I believe. Exhaust side was liveable. I would flycut. But there goes your SCR a little.

SLP4CamaroSS

iTrader: (16)

+1 with that if i rember correctly lg told me that same thing 114lsa no flycutt and 112 you have to if u using stock gasket and stock 205cc with milling then any

PREDATOR-Z

only a Newb would run tolerances like that on the street with a hydraulic engine.

waterbug1999

iTrader: (3)

I have dart 205s (same size valves as AFR's) and milled to a 59cc with at X3 on a 114.. They told me to cut .085" out, just to be safe. So far so good.

speedracer5532

iTrader: (8)

Do you remember what the clearance was on the exhaust valve?

JPH

iTrader: (2)

.101 -.104 i believe. Gotta check my old notes. My advice is to FLYCUT, if you decide not to, DO NOT stay on or hit the rev limiter at all!

JPH

iTrader: (2)

LOL. We both know, if he doesn't flycut and if he ever takes the heads off someday, he will see some contact points.

speedracer5532

iTrader: (8)

thanks, I will definitely check both valves but going by your information I would just cut the intake valve. I want at least .080 on the intake and .100 on the exhaust.

JPH

iTrader: (2)

You will just have to cut the intake side. Exhaust will be fine. Pushrod absorbtion/deflection, deck height expansion with heat, valve spring deflection will all gain you a little more PTV. So keep that in mind. Degree it, and check you PTV, and cut from there.