S_Johnson

So, I have a 400SBC(auto) and I want to do the t56 conversion.

I have an aftermarket internally balanced crank, so I don't need a weighted flywheel.

Also, I already have the inline holes for a "normal" starter, so I can use a 153 tooth flywheel.

Here's my question, why do I need the centerforce flywheel? What's wrong with say, this one: http://www.summitracing.com/parts/NAL-14085720/

Also, would I need a different flywheel for a t5?

Last question, my 400 should be putting out about 380HP, and 480Ft-lbs of torque.

Do I really need a t56? Or would a t5 be okay? (not racing, so no power shifts...)

Thanks guys...

calamitascamaro

iTrader: (5)

T5's die behind TBI 305's. You need a flywheel that will match your rear main seal.

S_Johnson

I know I need a two-piece RMS. the one I linked to is two-piece...

calamitascamaro

iTrader: (5)

http://www.summitracing.com/parts/FIZ-198661/

S_Johnson

Ok, I'm still confused, I can't see ANY difference between that one, and the one I posted, except for "preference" stuff, like weight, material, SFI rated, etc...

Why are the centerforce and fidenza ones "made for f-body 6-speeds?"

What makes them so special?

I don't give a hoot about the material, or SFI rating, etc... I just want the cheap one, why won't IT work?

Thanks...

cuisinartvette

It has to mate up to the T56 style clutch

S_Johnson

Oh, and those two $450 flywheels are the only ones that match?

What's so special about the t56 clutch????

jmd

iTrader: (4)

I'm running the 86-up 1pc rear main seal equivalent of that flywheel with a T56. But it took fabrication to get to that point.

https://www.thirdgen.org/forums/tran...questions.html

Focus a little more on "how serviceable, reliable and well-matched can I make my powertrain" and a little less on "how inexpensively can I do this."

S_Johnson

Gotcha, that makes sense.

So, question 2 then:

Those two flywheels are very different weights, I would LIKE to have the light aluminum one (I love that snappy quick-rev sound...), BUT, I don't want to have bogging problems etc.

I'm not racing, I just like to play around on the street so my "launch" matters to me ZERO. But I don't want it to feel like a small 4-banger either...

Since you have a similar weight flywheel, maybe you could tell me how it feels on the street?

Thanks.

S_Johnson

Oh, and, I'm putting a low-end cam in it (lots of bottom-end torque), and it has a long stroke (400SBC), so I figure that would help with the tendency to "bog?"

1985WS6TA

An LT1 T-56 clutch is a pull style clutch unlike the traditional push style. It has it's own type of flywheel.

jmd

iTrader: (4)

I've driven an aluminum < 10lb flywheel with my T56, a 15lb one and a heavier aftermarket one (for 2pc seal) too. The < 10lb one is
choppier taking off from a stop than with a 16lb one. An ultra light flywheel is not going to benefit your type of use. And a heavy one won't help anything either.

The 15 or 16lb one was stock in a lot of third gens and works fine; no reason to go heavier or lighter.

S_Johnson

It looks like the fidenza one (also cheaper), is around 13 pounds. I think I'll end up going with that one.

Now, I just need to FIND the t56 stuff cheap...