MrElectric03

iTrader: (71)

I have two flexplates at my disposal and am wondering which I should use for my setup.

The car is a 98 Formula, full race, 10pt chromoly cage, 30" rear hoosier 315/60/15s, Moser 9" w/ 4.56 gears, 40 spline axles, full spool, fully built TH350, trans break, Forged 347ci LS1, 235/340 cam, Lingenfelter 2 step, AFCO radiator, motor plate, on a 200 shot it should make 600-650 rwhp or so.

The two flexplates I have are a steel TCI and a CSR aluminum with bolt on steel ring gear. The CSR weighs 5.8 lbs and im not sure on the weight of teh TCI.

This car is full race, logic would tell me that the aluminum is better, obviously its lighter and will reduce rotating weight but I dont want to put it in if I may have trouble with it, so im wondering more if any of you have had trouble with these aluminum flexplates.

Thanks alot!

corvet786c

iTrader: (6)

I am not sure about the aluminum, but the steel being heavy will give you that better off the line that you need because of the mass.

MrElectric03

iTrader: (71)

I shouldnt need a ton of off the line, I forgot to mention im shooting for a 2700-2750 lb race weight, will be mini tubbing, cutting out trunk pans, cutting out useless brackets, useless wiring ect.

Wicked94Z

iTrader: (26)

I went steel, i'm shooting for a 3100 raceweight though. I'm not sure about the durability of aluminum flexplates, granted neither of us are making rediculous power.

MrElectric03

iTrader: (71)

Yep, I'll probably run the tci steel and sell the aluminum one with the torque conv that came with it.

camscam02

iTrader: (21)

CSR one all day. 100% better product

MrElectric03

iTrader: (71)

Do you use one? I was just wondering if anyone has had problems breaking them and if so how much power they are running. It certainly looks like a nice peice

camscam02

iTrader: (21)

I was a cheap *** and went with the hughes, Greg@FTI swears by them and uses them in most things and I trust his word, they also have all 3 bolt patterns in them compared to just two on the tci. Just a better product IMO.

You wont break it. lol

Vetal

iTrader: (3)

Any news on that subject? Which one better to get - TCI steel or CSR Aluminium?

HioSSilver

iTrader: (8)

whats the weight difference between steel vs aluminum?

MrElectric03

iTrader: (71)

Im using the aluminum one. I dont see any reason why it would break or anything and any weight taken from the rotating assembly means more hp to the wheels.

Not sure on the weight.

Vetal

iTrader: (3)

Is there any logic behind steel (heavy) flexplates being better for drag? As I see it, once you bring the revs up (let's say, to 3600rpm), you launch and revs never drop below 3600, so heavy flexplate does not give back to the converter any stored energy, right?
On the other hand, on the street lightweight flexplate would be nicer because when you press pedal it brings the engine to stall rpms faster. Actually on the strip too engine will rev from 3600 to shift point faster with light flex.
Am I wrong somewhere?

NHRAFORMULA00

iTrader: (2)

we have used an aluminum one from Reactor Products in a 900 hp pontiac motor.With a high stall race motor,you always want to keep the weight down on the rotating mass,hence aluminum!

Vetal

iTrader: (3)

Am i right thinking lighter flexplate will make the engine more responsive on the street?

HioSSilver

iTrader: (8)

yes you are

Vetal

iTrader: (3)

Good, which more or less light and not very expensive flexplates are there?

Vetal

iTrader: (3)

Are CSR and Meziere the only lightweight flexplates for LS?

MrElectric03

iTrader: (71)

Those are the only ones ive seen, and the only one I see widely used is the CSR

Vetal

iTrader: (3)

Now I just have to decide whether faster response (and faster power to the wheels) will be worth $100 extra

HioSSilver

iTrader: (8)

It sure is....I bet you've spent more on other stuff.