G5X2 Style, Custom grind with .20 less lift from CompCams??
07-01-2003, 02:03 PM
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G5X2 Style, Custom grind with .20 less lift from CompCams?? Im a direct dealer with compcams and i was talking to them about some custom grind ls1 cams (which they give a great deal on). I really dont think the .603 lift of the g5x2 is essential to getting max horsepower.
Compcams said they could grind a 232/240, .585/.585 (this would work with comp 918 springs), @ 112 or 114 and be alot cheaper than going through LG.
This is mainly because me and a couple friends are interested in swapping this style cam into our cars and not going into huge lift, piston/valve clearance problems and breaking valvesprings..plus you can run the common comp 918 springs.
What do you guys think? I doubt there would be any loss of power.
Compcams said they could grind a 232/240, .585/.585 (this would work with comp 918 springs), @ 112 or 114 and be alot cheaper than going through LG.
This is mainly because me and a couple friends are interested in swapping this style cam into our cars and not going into huge lift, piston/valve clearance problems and breaking valvesprings..plus you can run the common comp 918 springs.
What do you guys think? I doubt there would be any loss of power.
07-01-2003, 02:11 PM
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Re: G5X2 Style, Custom grind with .20 less lift from CompCams?? with those specs on an XER lobe the cam should make some pretty good power. Just having the same duration @ 50 thou. doesn't mean the cams have anything else in common though.
07-01-2003, 02:47 PM
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Re: G5X2 Style, Custom grind with .20 less lift from CompCams?? If you look at the XE-R lobe chart, the two lobes LGM is using are XE-R lobes.
As for what you will loose, I can't say. I guess it would be the same in asking if you had a .585 lift cam and stepped it down to a .567 how much power do you loose?
You are talking about .018 at the valve or about .0105 at the cam.
Do you really feel that .018 is going to save you a lot in the PTV area, or in terms of springs?
As for what you will loose, I can't say. I guess it would be the same in asking if you had a .585 lift cam and stepped it down to a .567 how much power do you loose?
You are talking about .018 at the valve or about .0105 at the cam.
Do you really feel that .018 is going to save you a lot in the PTV area, or in terms of springs?
07-01-2003, 05:21 PM
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Re: G5X2 Style, Custom grind with .20 less lift from CompCams?? Actually has anyone looked at Comp Cams XE-R line of cams?
They have:
232/234 .595/.598 @ 112
and a
238/240 .605/.609 @ 112 <-------this one looks great also. I never did like the big split of 232/240 from the g5x2.
They have:
232/234 .595/.598 @ 112
and a
238/240 .605/.609 @ 112 <-------this one looks great also. I never did like the big split of 232/240 from the g5x2.
07-01-2003, 05:43 PM
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Re: G5X2 Style, Custom grind with .20 less lift from CompCams?? I just spoke to compcams guys for a while...they cant custom grind a small lift to the same xe-r lobe in such a small scale....
But after discussing the g5x2 cam that is on the xe-r lobe and then thier 238/240 .605/.609 @ 112.
He HIGHLY thinks the 238/240 will make more power, have a slightly smoother idle, because he doesnt like the large split in the 232/240 g5x2.
Also it will clear PTV as long as their is NO milling of the heads. Also the listed spring to use with this cam is the Comp 918 spring. The new blue stripes have had no problems up to .625 lift.
Sooooooo I think im going to go with the 238/240 maybe and see if i can make a "crap" load of HP and be very streetable.
But after discussing the g5x2 cam that is on the xe-r lobe and then thier 238/240 .605/.609 @ 112.
He HIGHLY thinks the 238/240 will make more power, have a slightly smoother idle, because he doesnt like the large split in the 232/240 g5x2.
Also it will clear PTV as long as their is NO milling of the heads. Also the listed spring to use with this cam is the Comp 918 spring. The new blue stripes have had no problems up to .625 lift.
Sooooooo I think im going to go with the 238/240 maybe and see if i can make a "crap" load of HP and be very streetable.
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07-01-2003, 06:11 PM
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Re: G5X2 Style, Custom grind with .20 less lift from CompCams?? http://www.compcams.com/information/...971_Page-3.jpg
Ive never seen these cams before till the guy told me about them, they are the new 2003 ones i guess.
What do you all think about a 232/234 or a 238/240??
Ive never seen these cams before till the guy told me about them, they are the new 2003 ones i guess.
What do you all think about a 232/234 or a 238/240??
07-01-2003, 10:33 PM
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Re: G5X2 Style, Custom grind with .20 less lift from CompCams?? I am surprised Lou hasn't chimed in here yet. LG has devoted a lot of R&D on that G5X2 cam and the cam is worth the money. I think you may lose some HP but I think you may lose more torque then HP.
07-01-2003, 11:22 PM
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Re: G5X2 Style, Custom grind with .20 less lift from CompCams??
I am surprised Lou hasn't chimed in here yet. LG has devoted a lot of R&D on that G5X2 cam and the cam is worth the money. I think you may lose some HP but I think you may lose more torque then HP.
07-02-2003, 05:59 AM
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Re: G5X2 Style, Custom grind with .20 less lift from CompCams?? At what valve lift do you reach the point deminishing retuns w/a stock LS-1 head? I heard it´s not much more than .550.
07-02-2003, 07:22 AM
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Re: G5X2 Style, Custom grind with .20 less lift from CompCams??
Sooooooo I think im going to go with the 238/240 maybe and see if i can make a "crap" load of HP and be very streetable
07-02-2003, 07:29 AM
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Re: G5X2 Style, Custom grind with .20 less lift from CompCams?? milled or unmilled....I find it hard to believe 238 in the intake will not have PV issues 
07-02-2003, 08:07 AM
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Re: G5X2 Style, Custom grind with .20 less lift from CompCams?? Damn straight Fireball.
I doubt very much you will get 80 thou of clearance on the intake side with 238 duration.
I doubt very much you will get 80 thou of clearance on the intake side with 238 duration.
07-02-2003, 08:21 AM
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Re: G5X2 Style, Custom grind with .20 less lift from CompCams?? I will be running stock stroke and a 4-inch bore with Wiseco pistons (valve reliefs). Haven't decided on milling the heads yet (LS1 type). I am sure I could make this combo work though.
Streetable? Who needs streetable
Streetable? Who needs streetable
07-02-2003, 11:31 AM
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Re: G5X2 Style, Custom grind with .20 less lift from CompCams?? The LG cam is a grind that works... as far as i am aware Comp grinds LG's cams to LG's provided specs using one of comps blanks cut on the XR-E lobe profile. that being said there is a lot of work LG did to find the right opening and closing points as well as rates to get this cam to fit in the LS1. The G2 cam is not a clone of Comps already off the shelf cams with a little more lift and more split duration.
My setup is pretty close and i am breaking a few rules as to PV clearance since my heads were milled .015 with no flycutting. I have had no issues and run it to 6800 daily. i am happy with my 445rw as well as the 405rwtq, the idle it gives and the spray numbers (610).
I would say put whatever cam you choose to go with and post the results.. but the 238 on the intake i do not think will fit with a stock unflycut bottom end..
i would also not run a 918 style spring with this cam or any cam over 230 duration with 570 plus lift.. will the springs work? yes i am sure they will.. but for how long? there is not a dash light that comes on when it is time to replace springs.. they either break or you go into float and potentially tap a piston..but for a few dollars more i want RELIABILITY and STABILTIY in my valve train which is why i went with the dual springs as opposed to the 918's that came on my heads.. i will sell you my 918's cheap with Ti retainers and seat cups.
When going with large cams i would not go cheap on valve train weather that is springs to push rods to lifters.. your longevity depends on it.. you most likely spend money on Royal Purple or any of the other synthetic oils available when the 99 cent off brand works just as well..
Just my 02.. good luck with the cam selection!! hope all works out for you and post the numbers to prove your theories.
Wes
My setup is pretty close and i am breaking a few rules as to PV clearance since my heads were milled .015 with no flycutting. I have had no issues and run it to 6800 daily. i am happy with my 445rw as well as the 405rwtq, the idle it gives and the spray numbers (610).
I would say put whatever cam you choose to go with and post the results.. but the 238 on the intake i do not think will fit with a stock unflycut bottom end..
i would also not run a 918 style spring with this cam or any cam over 230 duration with 570 plus lift.. will the springs work? yes i am sure they will.. but for how long? there is not a dash light that comes on when it is time to replace springs.. they either break or you go into float and potentially tap a piston..but for a few dollars more i want RELIABILITY and STABILTIY in my valve train which is why i went with the dual springs as opposed to the 918's that came on my heads.. i will sell you my 918's cheap with Ti retainers and seat cups.
When going with large cams i would not go cheap on valve train weather that is springs to push rods to lifters.. your longevity depends on it.. you most likely spend money on Royal Purple or any of the other synthetic oils available when the 99 cent off brand works just as well..
Just my 02.. good luck with the cam selection!! hope all works out for you and post the numbers to prove your theories.
Wes
