gromero

iTrader: (1)

OK all,

I'm attaching a LSX supercharged SB to a TH400, what flex plate and crank adapter will I need and where can I get these? The TH400 is currently behind a stock 350.

George

allthrotle

iTrader: (2)

Well you have a couple of options, you can buy a Yank converter and not need any adapters, or you can buy the hughes flexplate and crank sleeve adapter and make it work that way. You can buy the flexplate and sleeve from summit, and or if you want to spend the money on the converter you can click on yanks, sponser link on the side.

veee8

iTrader: (40)

Or spend $200, and get the TCI flexplate. It is worth every penny. No crank adapter needed, SFI approved, will fit 4L60E converters or TH400 with small bolt pattern converters (TH350).

forcd ind

iTrader: (7)

GM sells a kit, .400 spacer, flat flywheel, and long bolts to adapt turbo 400(orig for the 4l80e)-if your running a small bolt converter, you might have to redrill the flywheel
Hughes also has adapters, so several choices-i found a 6.0 at the junkyard, motor was bad, but had the 4l80e on it at one time, $15 and i had a spare flywheel, spacer, and bolts

gromero

iTrader: (1)

Thanks all, I have an email tech question to Yank for pricing

FTICONVERTERS

iTrader: (3)

We also make a converter that bolts directly to to ls style engine without any adaptors or flexplate change. We are a competition converter builder.

Thanks,
Greg

ChevPower

iTrader: (8)

If you are using a th350/400 converter for a sbc you will still need the spacer with the tci flywheel because the pilot on the converter isnt long enough for the ls1 crank, But I believe the tci ls1 flywheel comes with the adapter now.