6.2 AFR 225cc G6x3 or MS4
08-24-2012, 12:25 AM
#1
6.2 AFR 225cc G6x3 or MS4 Putting together a 6.2L stock bottom end with AFR 225cc heads that have been milled to achieve a 66 cc combustion chamber. I know a custom cam would be best but I'm using what I have for now and can't decide if I should put in the MS4 or the G6x3 both an a 112 LSA. It's going into an 01ss 6 speed S60 with a 4.30 gear.
08-24-2012, 05:38 PM
#2
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I had the same shortblock and heads with a 12:1 compression. I went with the StreetSweeper from Flowtech because it is a proven cam. I broke 500 RWHP on a new engine with cheap headers. There was power everywhere and very linear.
08-25-2012, 11:35 AM
#8
He still could run a thicker gasket and solve that issue if he runs across it.
08-25-2012, 01:04 PM
#10
While not certain if the Op will be ok, the g6x3 clears PTV on a stock LS3. That's a 70 cc chamber vs. a 66 cc chamber. I wouldn't think only 4 cc's on the chamber would affect the PTV? Isn't it like .004 of and inch per cc? If that's the case then yeah PTV might be an issue.
He still could run a thicker gasket and solve that issue if he runs across it.
He still could run a thicker gasket and solve that issue if he runs across it.
08-25-2012, 06:45 PM
#11
Sorry to put an end to your comedy show, but I am flycutting regardless if it clears or not. Even if it does clear its too close for comfort. All I asked is an opinion from someone who might have done a set up like mine. Both cams were acquired because the price was right, not because Im a nut swinger on cams with a special name. Maybe I'll test both.
Pete
Pete
08-26-2012, 07:18 AM
#12
Were not talking much here on gasket thickness. Also, its somewhat a trade off, big chamber-thin gasket vs small chamber-thick gasket.
Last edited by 87silverbullet; 08-27-2012 at 09:08 AM.
08-26-2012, 07:21 AM
#13
Sorry to put an end to your comedy show, but I am flycutting regardless if it clears or not. Even if it does clear its too close for comfort. All I asked is an opinion from someone who might have done a set up like mine. Both cams were acquired because the price was right, not because Im a nut swinger on cams with a special name. Maybe I'll test both.
Pete
Pete
08-26-2012, 08:34 AM
#14
Thanks 87silverbullet, Its an l92 shortblock and I will be checking ptv just to make sure I have enough with the factory reliefs. It's a six speed with nitrous too. I have the ms4 in my ls1 now, how much it clears by I don't know it's a chance i took, I've heard both clearing without reliefs but I'm sure it's not enough clearance to be on the safe side.
08-27-2012, 09:15 AM
#15
Thanks 87silverbullet, Its an l92 shortblock and I will be checking ptv just to make sure I have enough with the factory reliefs. It's a six speed with nitrous too. I have the ms4 in my ls1 now, how much it clears by I don't know it's a chance i took, I've heard both clearing without reliefs but I'm sure it's not enough clearance to be on the safe side.
