5.3 to a 383?
Sep 5, 2007 | 10:06 PM
#21
TECH Fanatic
iTrader: (25)
Joined: Mar 2004
Posts: 1,810
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From: Newark, Tx.
I have an iron 347 (bored 5.3 block) in my '92
I am going turbo, so it has forged pistons with a little dish along with good rods. Plan on pushing the motor a good bit; 15-18psi eventually.
Only reason I went this way was I stumbled across a great deal. Otherwise, I would do the iron block 6.0.
I am going turbo, so it has forged pistons with a little dish along with good rods. Plan on pushing the motor a good bit; 15-18psi eventually.
Only reason I went this way was I stumbled across a great deal. Otherwise, I would do the iron block 6.0.
Sep 6, 2007 | 08:29 AM
#25
On The Tree
Joined: Jun 2007
Posts: 132
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From: DFW, Tx
Originally Posted by bluecajun5.3
i think it's worth it to bore or bore and stroke the 5.3.
you can find them for less than half the price of 6.0's
btw i just aquired a 5.3 longblock for free!
you can find them for less than half the price of 6.0's
btw i just aquired a 5.3 longblock for free!
I totally agree on that..... And i also got a free long block through my brother
So i have some ideas that i might be doing real soon 
Sep 7, 2007 | 07:23 PM
#26
Wow, this thread just took off! I was just wondering if anyone was thinking outside of the box. I guess the 408 is so mainstream nowdays. Not that it does not make good power, but everyone has one (except me 
). Good to know that people are thinking about different ideas.
). Good to know that people are thinking about different ideas.
Sep 9, 2007 | 11:55 AM
#27
i'm doing a ls1 383 because i got a great deal on the stroker kit and block so why not. then later on if it needs a rebuild then i'll just buy new pistons and a 6.0 and have a 402.
Sep 12, 2007 | 10:31 PM
#28
TTT good topic. I was bored/wondering about strokeing/boring the 5.3 also, since they have the same stroke & rod length as an LS1/6 anyways. Also in my boredom I was thinking how 6.0 heads on a 5.3 would run with a 4" crank, and if it would even out the compression somewhat since the 6.0's have larger combustion chambers, if not running shorter rods or different pistons. There has to be some kind of cost effective formula to run a decent built 5.3l N/A. I think it's under researched, everyone either goes F.i. on the 5.3 or goes to the 6.0 F.I. and or 408. Not that it's a bad idea, but if you already have a 5.3....I was bored at work what can I say.
Last edited by LMSeven; Sep 12, 2007 at 10:37 PM.
Sep 12, 2007 | 11:28 PM
#29
Originally Posted by IMD
if you're talking stroker stuff, youre going to have to buy pistons, rods, and a crank no matter what block you put them in. in my opinion, theres no point spending the money to bore your 5.3, then buy the rotating assembly to make a 383. if you're going to buy all this stuff, why not put it all into a 6.0 block and have a 402 or 408, for exactly the same money. theres an easy 50 ft.lbs and 50 hp just in the displacement difference. theres really no good reason to make a 383 out of a 5.3....at least not cost wise. theres no cheap or half assed way to do it. either spend the money on a turbo kit, or on a 6.0 stroker, and stop fu*&ing around.
Sep 13, 2007 | 08:21 PM
#30
I came up with $5000 part list to build the 383. This is using some of the best parts avaliable. Then, there is the cost of prepping the block, balancing and assembly. By the time it is over I would have a $8000 motor with the h/c I already have.
