Increasing displacement
TECH Apprentice
Joined: May 2010
Posts: 365
Likes: 1
no the stock sleeves will go out to LS1/LS6 specs, thats what I'm planning
I believe theres a guy running a stroker turbo motor, not that the car actually works with that kind of power...it was a custom made crank by one of the big dawgs Callies, Lunati, ect...
I believe theres a guy running a stroker turbo motor, not that the car actually works with that kind of power...it was a custom made crank by one of the big dawgs Callies, Lunati, ect...
TECH Fanatic
Joined: May 2008
Posts: 1,769
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From: Fargo, ND
Might be able to get 3.8 or a little more out of the stock ones.
It's a lot of machining to cut the old ones out etc. Darton makes sleeves for other ls motors.
http://www.dartonsleeves.com/sl_chevy.htm
It's a lot of machining to cut the old ones out etc. Darton makes sleeves for other ls motors.
http://www.dartonsleeves.com/sl_chevy.htm
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Verdad Gallardo TECH Apprentice
Joined: May 2010
Posts: 365
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a re sleeve and rebuild with a cam, valve spring, 1.8:1 rockers, hypereutectic pistons, dod delete, and LS6 intake is what $3500-4000 tops depending on the shop for similar power numbers, theres plenty of proven LS6 combo's at or near 500 horse
Last edited by V8ImpSS; Feb 23, 2012 at 04:40 PM.
TECH Enthusiast
Joined: Jun 2008
Posts: 621
Likes: 1
From: Zeeland, MI
This thread is 
If you want to bore the engine out then do it...report back to us on the dollar amount and the dyno results.
Edit: Also you need to add 2-3K to your budget for a built trans...check out TEP for parts.
If you want to bore the engine out then do it...report back to us on the dollar amount and the dyno results.
Edit: Also you need to add 2-3K to your budget for a built trans...check out TEP for parts.
TECH Apprentice
Joined: May 2010
Posts: 365
Likes: 1
There has got to be someone on here who has done it already and can shed some light on us. Or at least someone who knows for sure how big the stock sleeves can go. Either way I don't want more than 500 horse in this car, or it will be stupid for the street
exactly my point.. . . I can see maybe 380-410 to the wheels with the setup you want to do.
Also remember if your cam is bigger you will need a higher stall also. just by guess how you want a 500hp N/A LS4 setup, im sure you will use a radical cam.
Also remember if your cam is bigger you will need a higher stall also. just by guess how you want a 500hp N/A LS4 setup, im sure you will use a radical cam.
TECH Apprentice
Joined: May 2010
Posts: 365
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All things equal tho that turbo kit comes with a cutout, Water/meth injection, And a high flow cat...so figure an extra 30hp minimum, and around $700, with the addition of those to the natural aspirated motor, and if you up your compression with the water meth kit you can add like 10% more power
Starting to become clear to me that either way you can end up 500 wheel horse power for about the same money...but the turbo will get you way better mileage if you can keep ur foot out of it
As far as the cam I want to use, I want to move all the power to the mid and top end because I already have too much low end power for FWD, while maintaining drivability which is #1 priority, but that doesn't mean I'll NEED a stall converter, it's the same for the turbo as far as that because of lag, the stall converter can just make you faster but only if you can plant the power, which we can't
Last edited by V8ImpSS; Feb 23, 2012 at 04:36 PM.
This will be interesting.
Our small-bore 5.3 motors lend themselves better to turbocharging than to *****-out N/A power. We just don't have the options for making cubes that the other LS motors have.
No matter what we do, we have a sub-4.00" bore and are limited to a single crank (unless we spend big $$ for a custom one), so getting to your 500 HP without FI is going to make for a high-winding screamer that probably won't be much fun on the street.
If I had $9000-$10,000 that I wanted to drop on my Impala, I'd just do a bottom-end with some decent forged flat-tops and an LS9 camshaft. I'd ditch the 243 heads in favor of some CNC'd 317s to get the compression down. Up top, I'd do an LS6 intake, FMIC and a moderately sized turbo like a 6152. I'd also get a progressive system from AlkyControl and run 100% methanol. With this combo, one could easily get to 500 WHP at about 18-20 PSI, maybe less.
The result would be a fun car that won't break **** every week.
Thread Starter
TECH Apprentice
Joined: Dec 2010
Posts: 383
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Hmm , maybe i need to pull the heads and have a pro look at them and tell me what he thinks. I wouldnt wanna take it out to 6.0l of displacement , but adding a little displacement wouldnt hurt my feelings any.
TECH Enthusiast
Joined: Jul 2010
Posts: 528
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From: louisiana
dont waste your time, just get the turbo and have more manageable power for the same price. and you wont have to worry about breaking anything ( not including trans) plus doing the turbo kit you will have plenty of help and assistance from nearly anyone. if you are gong to go through all that work just sell it and buy an ls1 or ls2 or something
TECH Enthusiast
Joined: Nov 2008
Posts: 622
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All the LS cranks have the same size journals and are internal length the same. The shorter part of the crank you refer to can be machined off of any of them for use in our block (xx.0 off the snout and xx.0 off the tail) reluctor wheels are changeable and the flexplates can be changed to match to accomadate the bolt pattern as in 6,8 or 9 bolt pattern.
Connecting rods are also very adaptable.
As for the max safe oversize due to the small bore (thin sleeve)this sleeve can only be opened up by 0.010 (though GM recommends max OS to be half that or less) in the 5.3 alumi block...iron blocks can safely go to 3.900. You can have it resleeved for in excess of 2500.00 and a chance of distorting the block and then gambling that there is not an internal leak shortly after the first run.
Last edited by Ill_Born_ss; Feb 24, 2012 at 06:27 AM.
