5.3 LSA Supercharged cam/head question
Thread Starter
Joined: Feb 2006
Posts: 356
Likes: 3
From: SoCal-Victorville
So I'll tell you from experience that 600 whp in a light car is a lot for the street. The LSA boost comes in hard at low rpm's, and will make more than enough power for your Datsun. I wouldn't overthink it. Guys are making big numbers with iron block 5.3's and stock Gen4 internals. Put cam bearings, your choice of cam and run it. My Camaro could only fit a 275 rear tire under it and I could spin the tires at just about any speed. Scary the first time that happened at highway speeds. I sold the car before I could try a slick, but that's probably the only tires that would have given me enough grip to get a real launch.
My dad also has a 74 260z but with a Lq9 and Monster 700/r4 the we are putting together. He's thinking of selling it after we get it running because he said he's getting too old(76yrs). He has a 2021 LT1/10sp Camaro that is plenty fast for him.
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Joined: Jan 2008
Posts: 2,233
Likes: 1,523
From: Ohio, Georgia, Nevada, Texas
OP,
We like the 5.3 with the planned Gen 4 rods, pistons, and 799 heads. Grab our SUM-8715R1 Ghost cam then go out and enjoy your LS-swapped Datsun!
We like the 5.3 with the planned Gen 4 rods, pistons, and 799 heads. Grab our SUM-8715R1 Ghost cam then go out and enjoy your LS-swapped Datsun!
Personally, I like a more well rounded cam that runs great NA and also allows good flow through the engine. Good flow equals less boost equals lower intake air temps. Intake air temps are the LSA's achilles heel. 216 * on the intake side means the blower is pushing air towards an intake valve that is closed too much of the time. That runs boost up, runs intake air temps up, and lowers power potential. I'd look more towards a mid 220's intake duration along with a mid to upper 230's exhaust. 116 LSA with enough advance to get you to an 8.1ish DCR. That's the way I'd skin that cat. Lots of other ways to do it.
Thread Starter
Joined: Feb 2006
Posts: 356
Likes: 3
From: SoCal-Victorville
Personally, I like a more well rounded cam that runs great NA and also allows good flow through the engine. Good flow equals less boost equals lower intake air temps. Intake air temps are the LSA's achilles heel. 216 * on the intake side means the blower is pushing air towards an intake valve that is closed too much of the time. That runs boost up, runs intake air temps up, and lowers power potential. I'd look more towards a mid 220's intake duration along with a mid to upper 230's exhaust. 116 LSA with enough advance to get you to an 8.1ish DCR. That's the way I'd skin that cat. Lots of other ways to do it.
I'd get Pat G to custom spec you a cam. If you're looking for a shelf cam, something like this would fit the bill Pat G stage 1 LS3 blower camshaft (patgtuning.com)
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Verdad Gallardo Thread Starter
Joined: Feb 2006
Posts: 356
Likes: 3
From: SoCal-Victorville
OP,
We like the 5.3 with the planned Gen 4 rods, pistons, and 799 heads. Grab our SUM-8715R1 Ghost cam then go out and enjoy your LS-swapped Datsun!
We like the 5.3 with the planned Gen 4 rods, pistons, and 799 heads. Grab our SUM-8715R1 Ghost cam then go out and enjoy your LS-swapped Datsun!
PS this is my DD so I’m hesitant to even change my stock LM7 cam as this isn’t a max power build. I don’t tow but may tow a couple times a year in the future. But if I can get OEM drivability from the ghost cam I may do the swap.
Last edited by 90lxtc01; Dec 27, 2022 at 07:44 AM.
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Joined: Jan 2008
Posts: 2,233
Likes: 1,523
From: Ohio, Georgia, Nevada, Texas
@Summitracing do you still recommend this cam with a heavier 2004 Silverado 5.3 with an Eaton M122 supercharger? My truck has 456 gears 33” tires and a stock stall (for now). Being that this cam starts at 2800rpm?
PS this is my DD so I’m hesitant to even change my stock LM7 cam as this isn’t a max power build. I don’t tow but may tow a couple times a year in the future. But if I can get OEM drivability from the ghost cam I may do the swap.
PS this is my DD so I’m hesitant to even change my stock LM7 cam as this isn’t a max power build. I don’t tow but may tow a couple times a year in the future. But if I can get OEM drivability from the ghost cam I may do the swap.
Although, we could see the SUM-8728R1 Big Torkinator working here. Specs on it are .600/.585, 212/218, 110+3 with -5* of overlap. With a heavy vehicle like a 1/2 ton truck that's used as a truck, we like to close the intake valve 40* ABDC or earlier. In general the earlier we close the intake valve the sooner the powerband will start and end. The Ghost cam closes the intake valve 43* ABDC whereas the 8728R1 closes the intake valve 33* ABDC. The 8728R1 will make great torque from 2,000 on up and pulls well to 6,500+ with our SUM-174004 .600" lift beehives. It will have a steady lope and requires custom tuning but it will be easy to live with and have good driveability. It works just fine with a stock torque converter. This would be a fun daily driver combo that would surprise some folks
