AFR 205's/w G5 X3 cam?? Did you mill..?
10-24-2006, 08:40 AM
#3
If you spend that kind of money and don't mill, you're crazy. Don't waste your money.
I was afraid to flycut until I blueprinted my motor in my new setup and realized that cutting .070" out of the piston is nothing. So we cut. Easy enough. What do you think the flycutting will do to the motor? Or is it the additional cost that scares you? It was the cost that worried me. Until I realized I could buy the tool for $140 and use an old head and then I can even let people rent it for a fee.
I was afraid to flycut until I blueprinted my motor in my new setup and realized that cutting .070" out of the piston is nothing. So we cut. Easy enough. What do you think the flycutting will do to the motor? Or is it the additional cost that scares you? It was the cost that worried me. Until I realized I could buy the tool for $140 and use an old head and then I can even let people rent it for a fee.
10-24-2006, 12:37 PM
#5
Originally Posted by JG853
What are the benefits of flycutting? (Other than making room for the Cam). What are the disadvantages of flycutting - Does it hurt compression or anything?
JG853
JG853
It will displace some volume (the only negative besides potential cost and time if notching yourself) which has to be compensated in the milling of the heads (1-2 cc's only). Thats why LG consistantly gets away with a 59 cc head on pump gas....it essentially creates the same CR as a 61 cc head without valve reliefs which puts you in the 11.4 CR range....good for a larger cam with more overlap and totally fine with 92 or better octane in that situation.
Tony
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10-24-2006, 09:26 PM
#8
Originally Posted by PREDATOR-Z
If you mill you have to flycut
I'd mill down 205s to at least 62cc and probably go all the way down to 59cc with a G5X3 and flycut for safety.
10-25-2006, 12:47 AM
#9
TECH Senior Member
I will cut my left nut (I'll keep one for fun 
) if the G5X3 fits with 59cc mill and .040 Cometics.
Search for their initial setup, flycut all the way.
That cam is a 234/242 and has the clearances you mention on stock heads.
That is why the 112 will "FIT" but is below .080/.100 recommended street PTV tolerances. (some run tighter but some poeple base jump too
)
) if the G5X3 fits with 59cc mill and .040 Cometics.Search for their initial setup, flycut all the way.
That cam is a 234/242 and has the clearances you mention on stock heads.
That is why the 112 will "FIT" but is below .080/.100 recommended street PTV tolerances. (some run tighter but some poeple base jump too
)
10-25-2006, 04:42 AM
#10
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Originally Posted by PREDATOR-Z
I will cut my left nut (I'll keep one for fun ) if the G5X3 fits with 59cc mill and .040 Cometics.
) if the G5X3 fits with 59cc mill and .040 Cometics.
Originally Posted by Louis
AFRs milled to 59cc with a 40 thou gasket require no flycutting. Any other milled head I cannot speak for, but there is more PTV with that AFR setup than a cam only, stock head setup.
Louis
Louis
Originally Posted by Louis
Hi guys, there is 220 thou of valve drop with a milled, 59cc AFR and .040 cometics.
There is 200 thou of valve drop on a stock motor.
Any X series( G5, X1, X2, X3, X4, 111/112/114 excluding the xX ( which in most cases, thats install only here at the shop) will fit on a stock engine, 112 or 114. The X3 110 will not clear stock heads, but it will be close on the AFRs. You gain quite a bit of PTV with AFRs. If you are not sure, and want to know what your setup came in at, check it.
There is 200 thou of valve drop on a stock motor.
Any X series( G5, X1, X2, X3, X4, 111/112/114 excluding the xX ( which in most cases, thats install only here at the shop) will fit on a stock engine, 112 or 114. The X3 110 will not clear stock heads, but it will be close on the AFRs. You gain quite a bit of PTV with AFRs. If you are not sure, and want to know what your setup came in at, check it.
These quotes and much more discussion is in this thread:
https://ls1tech.com/forums/generation-iii-internal-engine/569395-g5x3-vs-ms3.html
Still doesn't make sense to me either.
