MTI X1 cam and flycutting
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MTI X1 cam and flycutting Well, I am sure glad I clayed my MTI X1 cam. It measured .035 on the intake PTV clearance. This is with unmilled (measured that) LS1 stg 2e heads and GM MLS gaskets. I did the test twice on two different slugs. Also I didn't use test springs so the clearance is probably tighter.
I guess I don't mind flycutting other than the delay/cost of getting the tools.
What gets me going is that through two phone calls and an email, MTI reassured me that that combo would clear "No problem"
Setup:
Stock LS6 shortblock
X1 cam .592/.571 230/228 @112
Unmilled LS1 heads 2.02/1.57
MAYBE I am doing the clay wrong? but I came up with the same results 4 times. I don't know.....anyone run the MTI X1 cam and not flycut the pistons?
I guess I don't mind flycutting other than the delay/cost of getting the tools.
What gets me going is that through two phone calls and an email, MTI reassured me that that combo would clear "No problem"
Setup:
Stock LS6 shortblock
X1 cam .592/.571 230/228 @112
Unmilled LS1 heads 2.02/1.57
MAYBE I am doing the clay wrong? but I came up with the same results 4 times. I don't know.....anyone run the MTI X1 cam and not flycut the pistons?
If your heads are unmilled and you're running 2.02 valves, I can't see your P to V being that tight unless your installed intake centerline is off. Never heard of that cam not clearing. Are you sure your heads are unmilled?
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2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
check out WILWAXU. hes running that very combo. why would u think u need to flycut with that cam? its not that big. the lift is below .600 and the duration doesnt go over 230. there are plenty of cars runnin bigger cams on stock bottom ends w/o touchin the pistons. as a matter of fact, i have the same heads, and im about to go to something bigger than that.
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Originally Posted by Patrick G
If your heads are unmilled and you're running 2.02 valves, I can't see your P to V being that tight unless your installed intake centerline is off. Never heard of that cam not clearing. Are you sure your heads are unmilled?
https://ls1tech.com/forums/generation-iii-internal-engine/267883-how-tell-if-head-has-been-milled.html
The cam was installed dot to dot. I guess I could degree the cam to see if it is what the cam card says it is. Although the etching on the cam matches, ser no. and all.
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The way I understood it when I got my 2E's are that all MTI heads are milled 30 unless buyer specifies otherwise. Not to doubt what you're saying, but I'm just giving you what I was told by them. It may be that close...you never know.
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From: Tomball
I have the X1 cam in my car, but with stock heads...A very good friend of mine that works for MTI tells me that I cannot run milled heads with out fly cutting my pistons...Im sure cleaning up the heads will not affect the P to V clearance, BUT milled heads with this cam is a big no no according to him...
Just being off topic MR2GURU...what kind of power are you putting down with this combo?? I will call my buddy Monday and ask him about this one more time and repost to let everyone know....
Matt
Just being off topic MR2GURU...what kind of power are you putting down with this combo?? I will call my buddy Monday and ask him about this one more time and repost to let everyone know....
Matt
If the heads are milled at all you'll have to flycut reliefs on the intake side. Degree the cam in, dot to dot won't do. If you need the fly cut tools I have access to them and I'm local. 
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Originally Posted by Jabroni
The way I understood it when I got my 2E's are that all MTI heads are milled 30 unless buyer specifies otherwise. Not to doubt what you're saying, but I'm just giving you what I was told by them. It may be that close...you never know.
The only thing I can think of is that my cam is improperly ground. Which in any case makes me leary of even using it, flycutting or not.
I'll call MTI monday and see how good their customer service is
Last edited by mr2guru; Mar 27, 2005 at 12:06 PM.
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Originally Posted by MUSTANGEATER
If the heads are milled at all you'll have to flycut reliefs on the intake side. Degree the cam in, dot to dot won't do. If you need the fly cut tools I have access to them and I'm local.
I should know whats going on here by tues I hope.
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Originally Posted by Jabroni
According to information I got just today from MTI, the biggest cam they recommend I use with milled 2E ported heads without flycutting is the Stealth II.
I didn't get a chance to call them today....but I've verified my heads are unmilled. After a LOT checking, rechecking, thinking, etc... I can only think that the ICL is off/mis-ground in the cam.
There are too many ppl running the X1 without flycutting.
I haven't measured my intake valves.....maybe I got shipped 2R heads by mistake and have 2.08's
That would also explain the discrepency. 
