L76 build
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From: Wildomar, CA
L76 build What's up fellas,
Doing a stroker build on a L76 motor. Junkyard find from a burnt up G8. Everything looks good, going to the machinist next week. I'm looking at a Lunati Voodoo 4 inch crank/H beam rod assembly, with Mahle forged flat top piston kit, -4cc for the valve reliefs. The heads are stock combustion chamber. They are going to be getting a valve job, and Ferrea Valves to lighten up valvetrain mass and inertia, valves etc.
What are people's thoughts on the Lunati assembly? Summit has it for $1099 and the mahles are $799. Nice for the budget. But I'm open to suggestions. The L76 is kind of an unorthodox base for this it seems. All the DOD/AFM stuff is already out. LS2 timing cover and valley cover, LS3 TB and intake (for now), LS7 lifter, got a dual roller chain, custom cam. 24x reluctor, it's going in my 2004 CTS-V, staying naturally aspirated.
Anyone have an idea of what static compression ratio might be? I'm shooting for 10.5:1 to keep it 91 octane friendly, our fuel out here sucks.
Thanks
Doing a stroker build on a L76 motor. Junkyard find from a burnt up G8. Everything looks good, going to the machinist next week. I'm looking at a Lunati Voodoo 4 inch crank/H beam rod assembly, with Mahle forged flat top piston kit, -4cc for the valve reliefs. The heads are stock combustion chamber. They are going to be getting a valve job, and Ferrea Valves to lighten up valvetrain mass and inertia, valves etc.
What are people's thoughts on the Lunati assembly? Summit has it for $1099 and the mahles are $799. Nice for the budget. But I'm open to suggestions. The L76 is kind of an unorthodox base for this it seems. All the DOD/AFM stuff is already out. LS2 timing cover and valley cover, LS3 TB and intake (for now), LS7 lifter, got a dual roller chain, custom cam. 24x reluctor, it's going in my 2004 CTS-V, staying naturally aspirated.
Anyone have an idea of what static compression ratio might be? I'm shooting for 10.5:1 to keep it 91 octane friendly, our fuel out here sucks.
Thanks
Last edited by ryridesmotox; Feb 12, 2015 at 07:04 PM.
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From: Studewood/Acres-Homes TX.
The Lunati assembly is pretty darn good never really heard anything bad about their stroker kits. The 58x reluctor wheel allows more tuning capabilities. I think you will need a converter to run the L76 with the 24x wheel.
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From: Wildomar, CA
I'm staying 24 tooth because my ecu. And since I have to order the assembly, I'll just order it with a 24 tooth.
My major concern is getting the proper wiring harnesses and sockets to connect the new generation sensors. Crank sensor isn't a big deal since in the same spot, all I have to do is swap it with a gen3 black sensor and I'll be fine. But cam sensor and knock sensors are in different places on GenIV motors.
I'm staying with my stock computer because I dont have the budget to go with a new setup right now. And I have to replace all the sensors anyways. The motor was in a fire so all the sensors are toast.
My major concern is getting the proper wiring harnesses and sockets to connect the new generation sensors. Crank sensor isn't a big deal since in the same spot, all I have to do is swap it with a gen3 black sensor and I'll be fine. But cam sensor and knock sensors are in different places on GenIV motors.
I'm staying with my stock computer because I dont have the budget to go with a new setup right now. And I have to replace all the sensors anyways. The motor was in a fire so all the sensors are toast.
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From: Wildomar, CA
Right on, exactly the info I was looking for, thanks. Does the timing cover matter? LS2 or LS3? I'm gonna do a double roller probably, BTR has em for fairly cheap, gonna order my cam and some other items there.
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From: Wildomar, CA
Anyone ever used these pistons? The are made by a company called SRP, made by JE pistons. I know JE are pretty good. I've used them before. These seem to be a really good deal.
http://m.summitracing.com/parts/srp-271100-8
My motor it's going to be NA for now. I don't I'll get around to going boost or a big shot of nitrous anytime soon. And of I did, I'd probably put new portions in anyways.
What are your opinions on these? Worth a damn or no?
Also, reason in going with a 10cc dish is because our 91 octane here is terrible. So I can't go too aggressive. My fuel system Errol be able to handle ethanol so for track days I may go that route. But I'll be on 91 octane on trips and such.
http://m.summitracing.com/parts/srp-271100-8
My motor it's going to be NA for now. I don't I'll get around to going boost or a big shot of nitrous anytime soon. And of I did, I'd probably put new portions in anyways.
What are your opinions on these? Worth a damn or no?
Also, reason in going with a 10cc dish is because our 91 octane here is terrible. So I can't go too aggressive. My fuel system Errol be able to handle ethanol so for track days I may go that route. But I'll be on 91 octane on trips and such.
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Thread Starter
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From: Wildomar, CA
Pulled the LS6 today, trans and driveshaft are out too.
Taking the L76 to the machine shop this week to get it punched out and have a rotating assembly tossed in. Can't wait for this to be finished.
Taking the L76 to the machine shop this week to get it punched out and have a rotating assembly tossed in. Can't wait for this to be finished.
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From: Pittsburgh PA
Anyone ever used these pistons? The are made by a company called SRP, made by JE pistons. I know JE are pretty good. I've used them before. These seem to be a really good deal.
http://m.summitracing.com/parts/srp-271100-8
My motor it's going to be NA for now. I don't I'll get around to going boost or a big shot of nitrous anytime soon. And of I did, I'd probably put new portions in anyways.
What are your opinions on these? Worth a damn or no?
Also, reason in going with a 10cc dish is because our 91 octane here is terrible. So I can't go too aggressive. My fuel system Errol be able to handle ethanol so for track days I may go that route. But I'll be on 91 octane on trips and such.
http://m.summitracing.com/parts/srp-271100-8
My motor it's going to be NA for now. I don't I'll get around to going boost or a big shot of nitrous anytime soon. And of I did, I'd probably put new portions in anyways.
What are your opinions on these? Worth a damn or no?
Also, reason in going with a 10cc dish is because our 91 octane here is terrible. So I can't go too aggressive. My fuel system Errol be able to handle ethanol so for track days I may go that route. But I'll be on 91 octane on trips and such.
I've used SRP's in medium power import engines but not in an LS. They held up pretty well but were not supposed to be used with big shots or lots of boost. If you're staying conservative on nitrous a quality cast piston will work well. Spend money elsewhere, forged pistons aren't necessary on most NA street builds.
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From: Wildomar, CA
Thanks for the reply.
I'm actually probably going with mahle pistons. They are forged, but they are pretty budget conscious. I got no problem dropping $7k on a motor build. But the wife would knife me in the throat while I slept.
The reason for wanting to go forged is because after the 500whp gets old, I'll throw a little 150 shot on it and have fun again lol
I'm actually probably going with mahle pistons. They are forged, but they are pretty budget conscious. I got no problem dropping $7k on a motor build. But the wife would knife me in the throat while I slept.
The reason for wanting to go forged is because after the 500whp gets old, I'll throw a little 150 shot on it and have fun again lol
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From: Wildomar, CA
What about cam? I'm looking around and just trying to decide on a shelf grind that will work good. Perhaps a Lingenfelter GT1-1
Anyone run a GT1-1 cam??? 229/242 .631/.631 114 I am going to get the Mahle 4cc dished pistons so there will be a little extra ptv clearance... Hopefully enough clearance.
I also got a Nick Williams 102/ FAST102 setup, lightly used. Just waiting for the owner to get back from his business trip so I can buy it. So that's HUGE for me and the budget right now.
Anyone run a GT1-1 cam??? 229/242 .631/.631 114 I am going to get the Mahle 4cc dished pistons so there will be a little extra ptv clearance... Hopefully enough clearance.
I also got a Nick Williams 102/ FAST102 setup, lightly used. Just waiting for the owner to get back from his business trip so I can buy it. So that's HUGE for me and the budget right now.
Last edited by ryridesmotox; Feb 18, 2015 at 11:37 PM.
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From: Wildomar, CA
Next question, lifters... Looking at the comp linked lifters. Budget friendly not withstanding, are these things any good? Anyone have experience with them?
http://m.summitracing.com/parts/crn-144530-16
http://m.summitracing.com/parts/crn-144530-16
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From: Wildomar, CA
There wasn't one. It was burned up in a fire. Got the manifold and throttle body for cheap. The heads and block are in good shape though. Also, none of the stock sensors or coil packs were salvageable.
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From: Wildomar, CA
Hey fellas another question. I'm keeping my LS6 wiring harness and ECU. Since my L76 has the LS3 heads, I have a LS3 fast 102 on its way. I have LS3 injectors as well. I know I have to get the harness adaptor EV1 to EV6. I'm also using a generic fast style fuel rail I got from Speedmaster, am I going to need extensions for the injectors?