the big swap!!!

[nightrider2]

well i've decided to switch from a 3.4 to.........a 4.3...thats right...biger engine...same numbers, anyway does anyone know tricks or important thing about these engines that could help

[ReodDai]

Re: the big swap!!!

Lets start with what you know. Please post everything you already know. Then we'll fill in the gaps.

[97rs4life]

Re: the big swap!!!

:work: why go to the 4.3???? That doesn't make much sense money and workwise, either 3.8l or v8 that thing and it will be easier and possibly cheaper for ya.

[Niko97RS]

Re: the big swap!!!

where does everyone find these funny little smilies

[ahank1]

Re: the big swap!!!

he is probaly thinking about funding.....it is probaly alot cheaper... what kind of power does the 4.3 have.. if it is close to the same then it does not make any sence. i am stuck on a little fence myself right now... i was thinking of building a lt1 and slaming it in my car.. or a 383 stroke... i have not decieded yet.. ahh screw it were is the nearest 572 lol....

[Shodown]

Re: the big swap!!!

Swapping the PCM is going to be a big PITA I would think. Would the stock K-member work for the 4.3? Probably need custom exhaust, well Y-pipe anyhow. Will the 4.3 fit up to the tranny of an fbody? Lots of varialbles to think about...

I'd go with a 3.8 or V8, probably cheaper and more mods are available for them than there are the 4.3. Guys who mod mini trucks swap the 4.3 for carbed 350's with no computer. The 4.3 is built for low-end torque, the top end power sucks.

[gugdathug3]

Re: the big swap!!!

Swapping the PCM is going to be a big PITA I would think. Would the stock K-member work for the 4.3? Probably need custom exhaust, well Y-pipe anyhow. Will the 4.3 fit up to the tranny of an fbody? Lots of varialbles to think about...

I'd go with a 3.8 or V8, probably cheaper and more mods are available for them than there are the 4.3. Guys who mod mini trucks swap the 4.3 for carbed 350's with no computer. The 4.3 is built for low-end torque, the top end power sucks.

the transmission is compatible with the 4L60E if its a vortec 4.3L off a s10 or sonoma. i agree tho, good low end power none up top.

[rdrr96]

Re: the big swap!!!

go with a turbod 4.3 like the syclone or the typhoon had... those are some :eek: engines

[wolf]

Re: the big swap!!!

the transmission is compatible with the 4L60E if its a vortec 4.3L off a s10 or sonoma. i agree tho, good low end power none up top.

the tranny from a v6 fbody will not work on any 4.3, the bellhouse pattern is different
and you will need a lt1 front crossmember or the 4.3 wont fit(the 4th gen v8 crossmember sit lower)
the 96 and newer heads flow great and would make good power with a cam and lightweight 9.5 cr pistons

[4thgenowner]

Re: the big swap!!!

Since a 4.3 is a 350 minus two slugs he could get forged rods and pistons for it.

[rdrr96]

Re: the big swap!!!

i thought it was supposed to be compatible with that of a 305 car... same bore and what not.

[wolf]

Re: the big swap!!!

heres the mounts you'd need to put a 4.3 in
http://www.allstarperformance.com/product.htm?prod=334

[nightrider2]

Re: the big swap!!!

ok i missed alot here ...
1) one of my buddies buddies wrecked his jimmy and wants 500 for the motor
2)i work at advance auto=sweet discount and access to uber info
3)mines a t-5 manual so it should bolt up...being it was used in a s10
i've got the swap figured out...i just want info on things like heads, intake, cams,...o and its a vortech with 80,000 on it...so it'll go forever

[RedFrk13]

Re: the big swap!!!

ok i missed alot here ...
3)mines a t-5 manual so it should bolt up...being it was used in a s10
i've got the swap figured out...i just want info on things like heads, intake, cams,...o and its a vortech with 80,000 on it...so it'll go forever

Your tranny should work fine, but you need the bellhousing from an s10 to go between the engine and tranny. The 4.3s use the v8 bolt pattern.

[gugdathug3]

Re: the big swap!!!

ok i missed alot here ...
1) one of my buddies buddies wrecked his jimmy and wants 500 for the motor
2)i work at advance auto=sweet discount and access to uber info
3)mines a t-5 manual so it should bolt up...being it was used in a s10
i've got the swap figured out...i just want info on things like heads, intake, cams,...o and its a vortech with 80,000 on it...so it'll go forever

true.... i own a '99 sonoma with 220k miles.

good luck with the swap!