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How much to notch pistons for G5X3 on 112?

Old 10-09-2004, 07:54 PM
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Default How much to notch pistons for G5X3 on 112?

I'm unsure how much to notch the pistons on my motor when I pull the heads off? I'm looking at Thunder's page with the Isky piston notching tools, and there's like 8 different ones listed. What diameter do I need? I'm gonna be running the stock heads. Maybe I should have just got the G5X3 on a 114 instead..
Old 10-10-2004, 01:50 PM
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Have you spoken to Lou at LG Motorsports about this yet?
Old 10-10-2004, 04:59 PM
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i thought you didn't have to notch anything with that cam
Old 10-10-2004, 05:02 PM
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Originally Posted by mdblackz28
i thought you didn't have to notch anything with that cam
ON the 114lsa u dont have to notch on stock heads, but the 112lsa u do
Old 10-10-2004, 06:33 PM
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Haven't spoken to him yet. Been kinda busy lately. I may just go to L.G. and swap it out for the 114. I don't wanna pull the heads if I don't have to. I wasn't able to get on this site in Iraq and thought the 112 would have been ok. The easiest thing would be to just exchange it, since I gotta run to Dallas soon anyways.
Old 10-10-2004, 11:48 PM
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Originally Posted by Patrolman808
Haven't spoken to him yet. Been kinda busy lately. I may just go to L.G. and swap it out for the 114. I don't wanna pull the heads if I don't have to. I wasn't able to get on this site in Iraq and thought the 112 would have been ok. The easiest thing would be to just exchange it, since I gotta run to Dallas soon anyways.
If you are truely on stock heads, you technically can PROBABLY get away with the 112, but it's closer than what most would recommend. For instance most would recommend at least .080 P/V clearance, but you could push the envelope and run .055 clearance. The only problem is that if you over revved or hit the wrong gear when racing you will probably have some contact. Also if you should experience valve float in the upper RPM's you might have some contact as well. Call Lou and find out for sure what your clearance would be first before you make a decision.
Old 10-13-2004, 08:36 AM
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I have this exact cam put in by LG and they did not have to fly cut the pistons.
Old 10-13-2004, 10:49 AM
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I know of bigger i.e Juggernaut cam fitting without fly cutting.
Old 10-13-2004, 12:36 PM
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Well, It's up to you to take a risk. If you get any valve float (and you will) you'll be kissing your pistons goodbye.
IMO anything less than 0.12 clearance is suicidal, and I don't care how many will say it's fine.
Still if you get the 114, you'll have to use a dial indicator to really make sure of your clearance.
Old 10-13-2004, 08:02 PM
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I have never run any of my LS1's over 5500. That's just me. Usually 5000 is as high as I took them. The one is going to be for cruising and not for racing. Sure I may get on it some, that's the whole reason for building the car like I am. It's going to be a driver. I should probably have gone with a X2, but I wanted one of Lou's cams regardless. I just prefer LG products. I PM'd Lou about the cam, waiting on a reply.
Old 10-14-2004, 07:44 AM
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With that cam you'll start making power at 5500, so your habits will change believe me, otherwise go and exchange it for a cam that fits your needs. I bet it is a sweet car, i have a 69 RS/SS with a 502 CID. i wouldn't let it go for the world. Had it for 22 years, now.
Old 10-14-2004, 08:56 AM
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If you are not going to rev the engine then this is not the cam for you. Go with something else like a tourqer cam. BTW the G5X-3 on 112 cam will fit without notching on stock deck height heads. I'm running it myself, and have had no problems. Oh yeah, I shift at 6750rpm. No valve float here.

Matt
Old 10-14-2004, 10:56 AM
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Originally Posted by Patrolman808
I have never run any of my LS1's over 5500. That's just me. Usually 5000 is as high as I took them. The one is going to be for cruising and not for racing. Sure I may get on it some, that's the whole reason for building the car like I am. It's going to be a driver. I should probably have gone with a X2, but I wanted one of Lou's cams regardless. I just prefer LG products. I PM'd Lou about the cam, waiting on a reply.
You've got the wrong cam there for what you want.
TR224 for ya.
Old 10-14-2004, 01:49 PM
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Originally Posted by Patrolman808
I have never run any of my LS1's over 5500. That's just me. Usually 5000 is as high as I took them. The one is going to be for cruising and not for racing. Sure I may get on it some, that's the whole reason for building the car like I am. It's going to be a driver. I should probably have gone with a X2, but I wanted one of Lou's cams regardless. I just prefer LG products. I PM'd Lou about the cam, waiting on a reply.
Then this is the wrong cam for you. Get a smaller cam on a 110 LSA if your car never goes above 5500rpms.
Old 10-14-2004, 01:50 PM
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Originally Posted by pdd
ON the 114lsa u dont have to notch on stock heads, but the 112lsa u do
No you don't have to, but for added safety it's recommended.
Old 10-14-2004, 08:36 PM
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Yea, I'm sure I'll end up carrying it higher than that. I am looking at heads now anyways. I might as well go all out on it and do it right the first time. It should be more fun to drive anyways..
Old 10-22-2004, 01:18 PM
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I'm selling my X3 on a 114 LSA for $325 if you want it. PM me if you need details.


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