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Rainbows Mechanic
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Discussion Starter #1
I dont know if i would ever do this but it crossed my mind today and idk if there was a write up like this so im SORRY :D dont bash me for repost...not looking at if "it would be cheaper just to do such and such instead" just kinda wanna know this.....Say i took my 94 v6...did a split port swap, bought the M112 adaptor and SC and all the accesories and went with a 4.2L stroker kit what kind of gains would you see with this..is it possible? Would it be better to just keep the 3.8 displacement or what? Like i said again i doubt i will ever do this i just wanna know! thanks guys! :eek:
 

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MM's official Chevy guy
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2,024 Posts
well there are still a lot of Variables in that like psi, cr, things like that. But you should get more power out of the 4.2 then the 3.8. also with the 4.2 you could get forged internals so you could up the psi. and make some real power.
 

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Rainbows Mechanic
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1,612 Posts
Discussion Starter #4
so split port,ported and polished of course,M112,and the 4.2 stroker kit what kinda power would you be lookin at?
 

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depends psi.. i would say a good built 4.2 could give u 230-260h.p depending on compression, cam and what not..

maybe 300-320 at 12 psi? maybe more... just a rough estimate.. idk how much the m112 makes at 9 or more psi i never seen any one on a v6 yet.. and idk wheres tomzac...
 

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MM's official Chevy guy
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depends on a man.

look around the 270- 330 rwhp range though
ya some wear in there, with the stock pulie. (it could be even more depending on cam, rr's, ect.
but you could sap the pulie and with some of the osthe menchend modsd get up to 400rwhp. maby more
 

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500 with the right pulley & m112
 

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damm everyone but 1 is low balling the **** outta this set up
a 4.2L built with an m112 at 10-12psi is easily about 400+rwhp

20psi did 500+ i believe maybe it was 24psi


really you dont need the split port upper intake

just heads and lower intake
 

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Rainbows Mechanic
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1,612 Posts
Discussion Starter #10
damm everyone but 1 is low balling the **** outta this set up
a 4.2L built with an m112 at 10-12psi is easily about 400+rwhp

20psi did 500+ i believe maybe it was 24psi


really you dont need the split port upper intake

just heads and lower intake
damn! that much huh? and the 3.8 block can handle that much power for awhile or would the bulk head **** out of it? like i said i doubt i ever do this just thought it would be bad ass :D thanks for going along with it tho and giving me some ideas....love this site :yes
 

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damn! that much huh? and the 3.8 block can handle that much power for awhile or would the bulk head **** out of it? like i said i doubt i ever do this just thought it would be bad ass :D thanks for going along with it tho and giving me some ideas....love this site :yes
A forged, built, 3.8 block can handle 600hp

EVEN, 700hp

We're waiting to see if it can handle 800hp...
 

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damn! that much huh? and the 3.8 block can handle that much power for awhile or would the bulk head **** out of it? like i said i doubt i ever do this just thought it would be bad ass :D thanks for going along with it tho and giving me some ideas....love this site :yes
the block
YES

the stock bottom end NO
10psi stock bottom end is about 330rwhpish
 

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Rainbows Mechanic
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1,612 Posts
Discussion Starter #13
well i know that the crank,rods and pistons would have to be forged but thats what im talking about..the full forged 4.2l kit...so that would actually be a good investment to go that way in a sense? lookin at what....about 7k pricing high with a tune?
 

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Rainbows Mechanic
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1,612 Posts
Discussion Starter #14
A forged, built, 3.8 block can handle 600hp

EVEN, 700hp

We're waiting to see if it can handle 800hp...
holy **** i knew the block was strong but i didnt know it was that strong!
 

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well i know that the crank,rods and pistons would have to be forged but thats what im talking about..the full forged 4.2l kit...so that would actually be a good investment to go that way in a sense? lookin at what....about 7k pricing high with a tune?
Find a forged crank for me.... nobody runs one.
 

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Rainbows Mechanic
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1,612 Posts
Discussion Starter #17
oh damn they dont have forged 4.2l cranks? wtf...haha...i guess i never pay attentioned to the kits....are the cranks that come with the kits stronger than the ones that are stock or are the same thing just new?
 

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Rainbows Mechanic
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1,612 Posts
Discussion Starter #19
so you think it would be on the "original side" and a good bang for the buck?
 
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