Lifter suggestions
Thread Starter
Staging Lane
Joined: Sep 2017
Posts: 80
Likes: 6
Lifter suggestions I’m trying to build a high revving LS (8200-8500 rpm). Short block is a new LS3 block, flat plane 3,0” stroke billet crank, JE pistons (420gram) and R&R rods (6,5” long).
On top I have AFR Mongoose 260 LS3 heads as delivered, exept titanium intake valves, Jesel rocker arms, no pushrods so far.
Comp cam 240/248 @.050 , .647/.647 111+4.
So, fairly good valvetrain stability but need suggestions on lifters and springs. AFR is recommending 7200rpm max, but that’s with the supplied SS intake valves and springs (155lb seat).
This is just an experiment motor and I’m trying to make it work with the parts I have, but I need a set of good lifters and a spring upgrade, so any suggestion apreciated.
On top I have AFR Mongoose 260 LS3 heads as delivered, exept titanium intake valves, Jesel rocker arms, no pushrods so far.
Comp cam 240/248 @.050 , .647/.647 111+4.
So, fairly good valvetrain stability but need suggestions on lifters and springs. AFR is recommending 7200rpm max, but that’s with the supplied SS intake valves and springs (155lb seat).
This is just an experiment motor and I’m trying to make it work with the parts I have, but I need a set of good lifters and a spring upgrade, so any suggestion apreciated.
Walk right past the Hydraulic Roller booth and stop at the Solid Roller guys place for this application. Stick with 3/8 heavy wall or 7/16 pushrods if you can fit them. I'd talk to a spring manufacturer for thier recommendation, but have the weights of ALL your valvetrain components before you dial the phone.
You'll be happier with the RPM capability of a SR setup and have less to worry about in the end.
I'm not convinced that a 240/248 cam would go to 9000 RPM though. 8000-8200 I think is possible.
My daily driver is a LS3 with stock 3.622" stroke, LSX-LS7 heads (270cc) and it has a similar cam (236/246 @ .050", .648"/.648" 110 +1) and it's pretty much done at 7200. I think the LS7 lifters are likely the cause. But I'm OK with that because I feel bad turning the stock crank any more RPM than that.
You'll be happier with the RPM capability of a SR setup and have less to worry about in the end.
I'm not convinced that a 240/248 cam would go to 9000 RPM though. 8000-8200 I think is possible.
My daily driver is a LS3 with stock 3.622" stroke, LSX-LS7 heads (270cc) and it has a similar cam (236/246 @ .050", .648"/.648" 110 +1) and it's pretty much done at 7200. I think the LS7 lifters are likely the cause. But I'm OK with that because I feel bad turning the stock crank any more RPM than that.
Thread Starter
Staging Lane
Joined: Sep 2017
Posts: 80
Likes: 6
Thanks guys, deep down I kind of figured a SR is the way to go, just trying to use the parts I have.
So, going Solid iso HR, who is the best to grind a cam for my application?
I have connections with Comp.
Suggestions?
So, going Solid iso HR, who is the best to grind a cam for my application?
I have connections with Comp.
Suggestions?
Originally Posted by Joystick
Thanks guys, deep down I kind of figured a SR is the way to go, just trying to use the parts I have.
So, going Solid iso HR, who is the best to grind a cam for my application?
I have connections with Comp.
Suggestions?
So, going Solid iso HR, who is the best to grind a cam for my application?
I have connections with Comp.
Suggestions?
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Not to be argumentative here, but I’m running a Comp solid roller and it’s quiet. In fact it’s the quietest LS valvetrain I’ve ever heard. Lash is set at .003 cold. If you have connections at Comp, give them a try. I just got a Comp cam cut for a different build, spec’ed by Tony Mamo, and it’s got their new polished finish on it. Impressive. A solid roller will require a different spring setup, but that’s the nature of the beast.
I like what your doing here. Is this intended for a street or race application? What vehicle is it going in?
I like what your doing here. Is this intended for a street or race application? What vehicle is it going in?
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Thread Starter
Staging Lane
Joined: Sep 2017
Posts: 80
Likes: 6
I’m just finishing up a Superlite SL-C build, it will be 90/10 street/track. For now it’s just a stock LS3 with a Comp HR 54-469-11 and AFR Mongoose 260 heads. Stock LS3intake.
About two years ago I stumbled on this flat plane crank with rods, pistons and a HR cam and I think the sound of a flat plane will be perfect to this kind of car.
I’m not looking for any big number HP, more the sound and high rev. My present LS3 will most likely produce more power than the flat plane.
Anyway, I don’t mind lash adjustment couple of times each summer (valve cover comes off easy) so I’ll call Comp for a solid.
Thanks guys, you just confirmed my thoughts.
About two years ago I stumbled on this flat plane crank with rods, pistons and a HR cam and I think the sound of a flat plane will be perfect to this kind of car.
I’m not looking for any big number HP, more the sound and high rev. My present LS3 will most likely produce more power than the flat plane.
Anyway, I don’t mind lash adjustment couple of times each summer (valve cover comes off easy) so I’ll call Comp for a solid.
Thanks guys, you just confirmed my thoughts.
I’m just finishing up a Superlite SL-C build, it will be 90/10 street/track. For now it’s just a stock LS3 with a Comp HR 54-469-11 and AFR Mongoose 260 heads. Stock LS3intake.
About two years ago I stumbled on this flat plane crank with rods, pistons and a HR cam and I think the sound of a flat plane will be perfect to this kind of car.
I’m not looking for any big number HP, more the sound and high rev. My present LS3 will most likely produce more power than the flat plane.
Anyway, I don’t mind lash adjustment couple of times each summer (valve cover comes off easy) so I’ll call Comp for a solid.
Thanks guys, you just confirmed my thoughts.
About two years ago I stumbled on this flat plane crank with rods, pistons and a HR cam and I think the sound of a flat plane will be perfect to this kind of car.
I’m not looking for any big number HP, more the sound and high rev. My present LS3 will most likely produce more power than the flat plane.
Anyway, I don’t mind lash adjustment couple of times each summer (valve cover comes off easy) so I’ll call Comp for a solid.
Thanks guys, you just confirmed my thoughts.
Thread Starter
Staging Lane
Joined: Sep 2017
Posts: 80
Likes: 6
I’m about 10 months in the build, aiming for inspection this spring
TECH Fanatic
Joined: Jan 2018
Posts: 1,060
Likes: 198
Walk right past the Hydraulic Roller booth and stop at the Solid Roller guys place for this application. Stick with 3/8 heavy wall or 7/16 pushrods if you can fit them. I'd talk to a spring manufacturer for thier recommendation, but have the weights of ALL your valvetrain components before you dial the phone.
You'll be happier with the RPM capability of a SR setup and have less to worry about in the end.
I'm not convinced that a 240/248 cam would go to 9000 RPM though. 8000-8200 I think is possible.
My daily driver is a LS3 with stock 3.622" stroke, LSX-LS7 heads (270cc) and it has a similar cam (236/246 @ .050", .648"/.648" 110 +1) and it's pretty much done at 7200. I think the LS7 lifters are likely the cause. But I'm OK with that because I feel bad turning the stock crank any more RPM than that.
You'll be happier with the RPM capability of a SR setup and have less to worry about in the end.
I'm not convinced that a 240/248 cam would go to 9000 RPM though. 8000-8200 I think is possible.
My daily driver is a LS3 with stock 3.622" stroke, LSX-LS7 heads (270cc) and it has a similar cam (236/246 @ .050", .648"/.648" 110 +1) and it's pretty much done at 7200. I think the LS7 lifters are likely the cause. But I'm OK with that because I feel bad turning the stock crank any more RPM than that.
Of course he'll have a different cam, and none of these relationships are truly linear, but it's not a bad way to get a rough estimate.
