Thoughts on NA 5.3 L33 build
07-26-2016, 04:50 PM
#41
Hmmmm....interesting.
So going all the way back to my original intent for the thread, and ultimately, the car build, whats going to result in the engine that fits my intended goal better (not taking overall cost into account just for the moment):
1. L33 with built heads and the cam motion solid roller valve train
or
2. LS2 block with 4.8L crank and 6.0L rods along with some worked L92 heads and a similar cam motion solid roller valve train?
The difference in engine size is only 4 cubic inches but I imagine they would probably drive very differently.
Thoughts?
So going all the way back to my original intent for the thread, and ultimately, the car build, whats going to result in the engine that fits my intended goal better (not taking overall cost into account just for the moment):
1. L33 with built heads and the cam motion solid roller valve train
or
2. LS2 block with 4.8L crank and 6.0L rods along with some worked L92 heads and a similar cam motion solid roller valve train?
The difference in engine size is only 4 cubic inches but I imagine they would probably drive very differently.
Thoughts?
07-26-2016, 06:35 PM
#43
I want to do this..bad. But I'm building an LS2 right now and am doing rod bolts and planning to spin it to 7500+ with a LLSR cam. I've got a 4.8 sitting right there I can rob the crank from but I think I am going to try it with the extra 30 cubes first. If I blow it up for RPM-related reasons, I'll then try the short stroke. I've also got a stock ls1 sitting neglected in the corner..this would make a 312ci short-stroke Al engine.
If I weren't putting this build in a 4K+ lb. vehicle, I think I might be tempted with the short stroke. I'm leaning toward a close-ratio gear box so I'll be in the revs always so maybe I am worrying more about that than I should.
In your case, equal cubes but shorter stroke, throwing cost out the window, I think I would take the shorter stroke every time. But if you are purchasing an LS2, installing rod bolts and still winding that thing out with a solid roller is an option you should consider as well. Of course then you are not in nostalgic displacement territory but you could always just tell guys it's a 350 or a 400.
Since I'm spending your money, not mine, I feel it important to point out that you could pick up a LSX block, bore it to 4.129" and run it with a 3.267" stroke(4.8) crank and have exactly a 350 that would rev to the moon and take whatever abuse you throw at it.
If I weren't putting this build in a 4K+ lb. vehicle, I think I might be tempted with the short stroke. I'm leaning toward a close-ratio gear box so I'll be in the revs always so maybe I am worrying more about that than I should.
In your case, equal cubes but shorter stroke, throwing cost out the window, I think I would take the shorter stroke every time. But if you are purchasing an LS2, installing rod bolts and still winding that thing out with a solid roller is an option you should consider as well. Of course then you are not in nostalgic displacement territory but you could always just tell guys it's a 350 or a 400.
Since I'm spending your money, not mine, I feel it important to point out that you could pick up a LSX block, bore it to 4.129" and run it with a 3.267" stroke(4.8) crank and have exactly a 350 that would rev to the moon and take whatever abuse you throw at it.
Last edited by Mercier; 07-26-2016 at 06:42 PM.
07-28-2016, 10:01 AM
#45
On The Tree
If you're wanting to keep the old school look with the LS engine you should check out this thread: http://67-72chevytrucks.com/vboard/s...d.php?t=668385
It's in a '72 C-10 so a little different but it's the most "retro" looking LS swap I've seen...
It's in a '72 C-10 so a little different but it's the most "retro" looking LS swap I've seen...
07-28-2016, 10:02 AM
#46
So I've got a line on a local LS2. Engine is being sold by the original owner....hydroplaned and wrecked his 50K mile 2005 GTO. He bought it back from the insurance company after they totaled it with the intent of swapping the drive train into something cool. He's relocating and doesn't want to move the pile of parts he stripped off the car. The engine is complete from intake to pan and includes manifolds, fuel rails with injectors, throttle body, MAF, gas pedal, full uncut harness and ECU. Sounds like he'll let it all go for 5K.....
Sounds like a reasonable price given whats available on eBay/craigslist and given the lower milage and the face that its local so I wouldn't have to pay for shipping or travel to pick it up. Given the motor is 100% complete, Im half tempted to completely ditch the 327 idea, throw some L92 heads and that Cam Motion solid roller set up at the stock LS2 and be done with it.
Sounds like a reasonable price given whats available on eBay/craigslist and given the lower milage and the face that its local so I wouldn't have to pay for shipping or travel to pick it up. Given the motor is 100% complete, Im half tempted to completely ditch the 327 idea, throw some L92 heads and that Cam Motion solid roller set up at the stock LS2 and be done with it.
07-28-2016, 11:46 AM
#47
So I've got a line on a local LS2. Engine is being sold by the original owner....hydroplaned and wrecked his 50K mile 2005 GTO. He bought it back from the insurance company after they totaled it with the intent of swapping the drive train into something cool. He's relocating and doesn't want to move the pile of parts he stripped off the car. The engine is complete from intake to pan and includes manifolds, fuel rails with injectors, throttle body, MAF, gas pedal, full uncut harness and ECU. Sounds like he'll let it all go for 5K.....
Sounds like a reasonable price given whats available on eBay/craigslist and given the lower milage and the face that its local so I wouldn't have to pay for shipping or travel to pick it up. Given the motor is 100% complete, Im half tempted to completely ditch the 327 idea, throw some L92 heads and that Cam Motion solid roller set up at the stock LS2 and be done with it.
Sounds like a reasonable price given whats available on eBay/craigslist and given the lower milage and the face that its local so I wouldn't have to pay for shipping or travel to pick it up. Given the motor is 100% complete, Im half tempted to completely ditch the 327 idea, throw some L92 heads and that Cam Motion solid roller set up at the stock LS2 and be done with it.
Unless there is a T56 included, and I just typed all that for nothing.
07-28-2016, 02:22 PM
#50
TECH Fanatic
I would not. It has that funky tailshaft/shifter thing going on, and a traditional driveshaft yoke will not fit. But hey, throw it on Craigslist and see if someone will bite because "T56!!!"
Personally, I wouldn't even give a CTS-V T56 any attention unless I had a CTS-V.
Personally, I wouldn't even give a CTS-V T56 any attention unless I had a CTS-V.
07-29-2016, 07:24 AM
#52
TECH Fanatic
The GTO has the same gearing, but it has the same dimensions as the F-Body transmission. That's why a lot of F-Body guys will bolt in the GTO trans for better gearing, or some GTO guys will bolt in an F-Body trans because they found one cheaper than it would cost to rebuild theirs.
07-29-2016, 04:20 PM
#53
Yea no trans with this one. I agree that its definitely on the high end of the range....4ish probably being a decent buy with only 50K miles on it (based purely on recent eBay and craigslist searches). Id love to know where you found one for $2500.....thats a steal as far as I can tell. I haven't found anything within 3 hours of me at all, so if I could get him to come down to 4 for the whole thing, I may grab it.
