400 sbc
#1
400 sbc
well i bought an 1985 Iroc-Z with a 400 sbc, Turbo 350 but no title, so i was thinking of swapping the engine into my 89 RS. Is this a good move, or is the 350 a better investment, it's going to be a daily driver only but with some kick in it to keep the ricers at bay. My only concern is my t-5, can it support its power and is the swap even worth it, i have a 305 in it right now? Thank you
#4
RE: 400 sbc
Just FYI the 400 small block is an externally balanced engine so the flywheel and harmonic balancer have to be for a 400,you can't use the flywheel off the 305 or a 350 with that engine.
Other than that it should be a plug & play,just get the right flywheel and harmonic balancer.
Other than that it should be a plug & play,just get the right flywheel and harmonic balancer.
#6
Join Date: Nov 2007
Location: Eastern PA,
Posts: 10,462
RE: 400 sbc
T-5 was not offered with the 350 because it could not handle the torque. Compaired to the 350 the 400 is a torque monster. the 400/350 combo can be a good match if the 350 has been beefed up.Many of the SB 400 came with TH400 from the factory.
#7
RE: 400 sbc
I'd really prefer to keep the car a manual transmission cause its a whole lot more fun and for that little extra fuel mileage. What about a t-56 swap or maybe rebuilding the t-5? Also has anyone heard of a 400 sbc with a tpi unit. I have TBI on the 305 right now and carb on the 400 and a 400 TBI doesnt interest me AT ALL, what would you guys do?
#10
RE: 400 sbc
I have heard that as well, so if you are interested, you can do like what I am doing and using the 400 pistons and crank to make a wicked 383 stroker witha 350 4 bolt main block. just a suggestion. I know some here will pont out you could buy one for less headachs that cost about 5 grand ( and it do look sweet), but something about the " ya I built it myself" thing I kinda like.lol.