G5x3 cam too big?
Originally Posted by 30th t/a
I also had 4:10s with my g5x3 112 and i loved them. id get the 4:10s because you still got 2 overdrive gears. i could cruise at 80mph and be at 2200rpm. you say you would loose to much top end. if you want to get max performance in the 1/4, definately get the 4:10s. if you plan on doing 180mph alot of the time, keep the 3:42s.
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
Originally Posted by Importdestroyer
Again its a Y body with an M12, not an F body with an M6 (see sig). Right now with the stock 3.42's Im shifting right about where an M6 with 4.10's does. In an earlier post I went into this with greater detail. At 80 mph Im at 2k stock too.
Stock f-bodys shift at 5800, what do you shift at?
I know the M12 gears are tighter, but not that tight.
Does someone have a final drive comparison>
stock ZO6 and 4.10/ M6 f-bod?
i used to have a G5X3 in my z06 before i went with my 408, i had g5x3 on a 114 lsa, west coast ported 3 ls6 heads, fast 90, nw 90 tb, i made 471 rwhp 421 rwtq, to the tire, that was through stock gears, with a m12, my low end torque was pretty good, i would blaze the tires when i laid on it
Originally Posted by PREDATOR-Z
Dude this a vage comparison. Does the F-body shift at same rpm??
Stock f-bodys shift at 5800, what do you shift at?
I know the M12 gears are tighter, but not that tight.
Does someone have a final drive comparison>
stock ZO6 and 4.10/ M6 f-bod?
Stock f-bodys shift at 5800, what do you shift at?
I know the M12 gears are tighter, but not that tight.
Does someone have a final drive comparison>
stock ZO6 and 4.10/ M6 f-bod?
2nd:2.07's 69 mph at 6500 rpm
3rd: 1.43's 100 mph at 6500 rpm
4th: 1.00:1 143 mph at 6500 rpm
5th: .84:1 170 mph at 6500 rpm
RPM's at 60 mph in 6th, 1500 rpm
I just raced my friends M6 camaro with 4.11's, and we were shifting at the same speeds, with the obvious exception of 4th which, we didnt run over 115 mph. Isnt the stock redline on an LS1 6250? At least that's were mine was on my 98....
Originally Posted by RyneZ06
i used to have a G5X3 in my z06 before i went with my 408, i had g5x3 on a 114 lsa, west coast ported 3 ls6 heads, fast 90, nw 90 tb, i made 471 rwhp 421 rwtq, to the tire, that was through stock gears, with a m12, my low end torque was pretty good, i would blaze the tires when i laid on it
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Joined: Dec 2005
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From: Scottsdale, AZ
I say toss your heads in the garbage, put in the GX3 with some LS2 heads, and make 440+ rwhp to the tire. That's how small your cam is, and how useless your heads are.
Then throw a 100 shot on it and smoke everything.
Then throw a 100 shot on it and smoke everything.
TECH Senior Member
Joined: Mar 2004
Posts: 14,620
Likes: 17
From: BFE
Originally Posted by Importdestroyer
1st: 2.97's 48 mph at 6500 rpm
2nd:2.07's 69 mph at 6500 rpm
3rd: 1.43's 100 mph at 6500 rpm
4th: 1.00:1 143 mph at 6500 rpm
5th: .84:1 170 mph at 6500 rpm
RPM's at 60 mph in 6th, 1500 rpm
I just raced my friends M6 camaro with 4.11's, and we were shifting at the same speeds, with the obvious exception of 4th which, we didnt run over 115 mph. Isnt the stock redline on an LS1 6250? At least that's were mine was on my 98....
2nd:2.07's 69 mph at 6500 rpm
3rd: 1.43's 100 mph at 6500 rpm
4th: 1.00:1 143 mph at 6500 rpm
5th: .84:1 170 mph at 6500 rpm
RPM's at 60 mph in 6th, 1500 rpm
I just raced my friends M6 camaro with 4.11's, and we were shifting at the same speeds, with the obvious exception of 4th which, we didnt run over 115 mph. Isnt the stock redline on an LS1 6250? At least that's were mine was on my 98....
So you guys were not shifting at same rpm, so his gears are shorter if he reached the same speed with less rpm.
Originally Posted by PREDATOR-Z
Shift limiter is at 6250.
So you guys were not shifting at same rpm, so his gears are shorter if he reached the same speed with less rpm.
So you guys were not shifting at same rpm, so his gears are shorter if he reached the same speed with less rpm.
With 4.10's in an M6 you would need to shift to 5th around 125 or so right? I cant remember, its been 4 years now since I had my TA with 3.73's.
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Joined: Sep 2005
Posts: 339
Likes: 0
Originally Posted by Importdestroyer
Youre right, when I purchased the heads I did a ton of research. And a certain article in GM high tech performance led me to believe they could make good power. I dont know whether to attribute my low #'s to the heads or the crane 1.89 rocker arms, or both.
I cant post my graph here as I dont have it, but at 6k the power takes a dive and then recovers at like 6300 rpm, only thing we could attribute the drop off to is the rocker arms.
I wish I had the $ to make things right now, but I dont. Im hoping ditching the rocker arms for stock ones and running more duration and less lsa will cure the drop off and make more power. I dont plan on ditching these heads just yet, people are making ok power #'s with them, but youre right, not much more over stock LS6 heads.
Right now Im looking at $1200 in parts and labor for a cam swap, to maybe a futral f13 112. Im praying that puts me around 430 rwhp, Im pretty optimistic as I know a few stock headed LS1 owners with longtubes and cams in the 230's putting down 420-430 rwhp.
I cant post my graph here as I dont have it, but at 6k the power takes a dive and then recovers at like 6300 rpm, only thing we could attribute the drop off to is the rocker arms.
I wish I had the $ to make things right now, but I dont. Im hoping ditching the rocker arms for stock ones and running more duration and less lsa will cure the drop off and make more power. I dont plan on ditching these heads just yet, people are making ok power #'s with them, but youre right, not much more over stock LS6 heads.
Right now Im looking at $1200 in parts and labor for a cam swap, to maybe a futral f13 112. Im praying that puts me around 430 rwhp, Im pretty optimistic as I know a few stock headed LS1 owners with longtubes and cams in the 230's putting down 420-430 rwhp.
Originally Posted by yak
flycut and run the x3 on a 112. you will not be disapointed 
Look into the info on the isky tool webpage it will tell you all you need to safely flycut your own pistons without pulling apart your shortblock. We did my car in an hour tops and it was our first time flycutting. You tape off the pistons one by one as you do them and all the shavings fall to the side, plus as you are flycutting each piston it is at tdc so not much to worry about there. HTH
Originally Posted by THE BLACK WIDOW
Look into the info on the isky tool webpage it will tell you all you need to safely flycut your own pistons without pulling apart your shortblock. We did my car in an hour tops and it was our first time flycutting. You tape off the pistons one by one as you do them and all the shavings fall to the side, plus as you are flycutting each piston it is at tdc so not much to worry about there. HTH
