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Thread: motor swap - 350, 383
06-20-2010, 07:21 AM #1
motor swap - 350, 383
i was gonna rebuild my '96 350 but was thinkin bout puttin in a 383. i was gonna buy headers for my 350. i was woundering if anyone has done this and what way i should go. any opions will be helpfull
07-02-2010, 05:34 PM #2
in other words i was wounderin if spending the extra money on the 383 was worth it or not
07-02-2010, 09:47 PM #3
Only if you are going to spend to money un an upgraded computer and upgrading the tranny so you dont tear it out. I have seen a few pwople who have done it on the non vortec motors and yes they had more power.Mike
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07-03-2010, 05:13 PM #4
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I'm actually shopping for an engine for my 96 also and was considering the 383 also. Can you give more details about the computer upgrade; like what's the price and where would I purchase it from and what would have to be done to the tranny also. If it's gonna be more than about $500.00 to $1000.00 then I'm not going to do it. Let me know something, please.
07-03-2010, 05:17 PM #5
I think a 383 Stroker long block runs at least $2500.. And the tranny would hold up for a while but you would want stronger parts in it to take the high power output. The computer would most likely need a custom tune.
07-03-2010, 06:36 PM #6
if you get the GMPP 383E the computer will not need upgrading as it will adapt to it(you could just get a custom tune from blackbearperformance $400), but even though GM designed the 383E to directly replace the 5.7 vortec the 383 puts the tranny at its limits. i would get a 4L80E tranny and get a shift kit put in it at the very least. then you could really open up the crate 383 with a cam and headers99 K1500 Suburban LT "THE BEAST"
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07-29-2010, 02:46 PM #7
thats alot more work then i want to do, but what if i bored out my 5.7 to a 355? would the 4L60 hold up to that?
07-30-2010, 07:29 AM #8
Yeah since with the factory EFI etc, you really arent exceeding much beyond what the 5.7L vortec had to begin with. I have seen the 4L60E handle 300HP with out any major drama. And a good set of headers and bored out a bit it will still be under that number.
08-10-2010, 07:10 PM #9
my only fear is that my tranny has 221k miles on it, but by the sounds i shouldn't have a problem. my step-father said i'd gain about 100hp if i bored it out, is that bout rite?
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