clutch advice

[red99pony]

i am going to be bolting up a t56 to my 4.6 in about a month. i thinking of going with the centerforce dual friction part number #800075. it is said to have great holding power and low pedal effort. this is going to be a daily driver and going to have somwhere around 450 to 500 crank hp. does anyone have any suggestion on where to buy or another cluch that will work well. please let me know if you do. thanks

[Mustangscotty]

The Centerforce will do you well, but consider a DFX clutch from Centerforce. The DFX is streetable, comparable in price and will hold more HP/torque than the dual friction #800075

http://www.summitracing.com/parts/CTF-DF800075/

http://www.summitracing.com/parts/CTF-01148075/
Centerforce is proud to announce DFX as their competition-proven clutch packages for select import and domestic applications. These new DFX series clutches are engineered for competition standards of quality and craftsmanship. The DFX series clutches are aimed at high-end applications that continually demand increased integrity and holding capacity. DFX clutch kits score big--not only with their holding capacity and strength, but also with their race-inspired drivability. The DFX clutches retain an easy pedal effort, thanks to Centerforce's patented ball-bearing actuated diaphragm, for smooth engagements without detriment to the vehicle's release components. The Centerforce DFX performance clutch systems utilize nodular iron pressure plate rings and reinforcements designed to help prevent drive strap breakage and safety. The DFX series clutch kits allow end users to tailor their driving performance and style with different choices of clutches and clutch discs, from street/strip to full-on drag racing capabilities.

Hard launches?? Take the worry out of the equation and upgrade to the 26 spline input shaft from Liberty!

Consider a dyno tune to adjust shift points? Maybe a gear swap to account for a change in gear ratio changes for each gear. A short throw shifter is definitely needed for a T56.
http://dagostinoracing.com/index.php?main_page=product_info&products_id=9494

Use ARP hardware for the clutch installation! Steel flywheel for high rpm launches works well !

More of everything will be reaching the rear end, consider an axle and battle box upgrade..

[red99pony]

i currently have 410 rear gears and i think they are a bit too much. i am either going with 355 or 373 gears. anyone have a suggestion? opinion?

[red99pony]

thanks for the good information mustandscotty

[Mustangscotty]

3.73's for sure !

[Illusions]

when you go forced induction you will not want the 4.10's at all but for a NA 4.6 2v they are perfect. 4.30's or 4.56's for the 4.6 n/a 4v There isn't a real difference between the 3.73's and the 4.10's but when I had 4.10's in my 02 I was still getting 27mpg on the highway back and forth to Alabama. It was also pretty quick for a bolt on 4.6 2v too.

You may also want to look into your axles. the 8.8 in the mustangs is week. get some 31 spline moser or strange axles too.

[clubracergt1]

I love my 4.10s; but, as Illusions said, they might not be so hot with a forced induction set-up. Also, as he said, I still get decent fuel mileage. I can report better after Labor Day weekend as I am driving up to Illinois.

[red99pony]

so what gear do you recommend illusions?

[Illusions]

what are you looking at for your final setup? it will also depend on powerband

[red99pony]

powerband is currently unknown since i haven't finished the build yet. i don't fully understand what you mean by final set up. it is going to be a street car with 10.5 inch rear tires t56 4.6 making maybe 450 or so, but i don't think that is what you want to know

[Whaler]

powerband is currently unknown since i haven't finished the build yet. i don't fully understand what you mean by final set up. it is going to be a street car with 10.5 inch rear tires t56 4.6 making maybe 450 or so, but i don't think that is what you want to know


Is it forced induction or naturally aspirated? That makes a big torque difference and where the power band will be. N/A engines would like more gear to get the motor in it's power band.

[Illusions]

Is it forced induction or naturally aspirated? That makes a big torque difference and where the power band will be. N/A engines would like more gear to get the motor in it's power band.

I agree

what I mean by setup is n/a, f/I and cam selection for rpm range of the proposed powerband will be. You want to know where the power is being made. if its high in the rpm band you want a numerically higher gear to get you into your power band quicker.

Also what are your plans for the car. Street/Strip or just strip?

Here's some reading:
http://www.chevyhiperformance.com/techarticles/148_0208_gear_ratio_calculating/index.html

Calculator: http://www.grimmjeeper.com/gears.html

[red99pony]

ok it will be eaton supercharged with patriot stage 3 heads and cms(vt) stage 2 blower cams. power band is 1500 to 6000. i will start on the reading also. thanks

[red99pony]

oh, all street use with a few passes on the track but most likely not many

[LXtasy]

i vote 3.55.

[BigdaddyDupree]

3.73. lets meet in the middle. but if you have a 4.10 now why not try it with that first

[red99pony]

well i am but i had them in when i had my saleen series 2 with the t45 and it was pretty hard to control. maybe they will work out but i really doubt it.

[slowgreen99]

3.27s, and i have a spec stage 3 for sale lol

[Illusions]

Remember he is running it through a t56 (6 speed) he can still run 4.10's and have highway driveablity. Like its was said before, if you already have the 4.10's just stick with them and see how it reacts. no need to spend money if its working ok. Traction might be a little limited but you can fix that too. beef up the rear and get wider tires.

I'd even be tempted to slap some 4.30's in it as a test but thats me. I'd be at the track. You can also get a 3.90 for the 8.8 so thats an option too.

Again I would wait to spend mioney until you can get it tuned, and dynoed to see the tq/hp curves of the combo. street drive it with the 4.10's, think about wider tires. they are less likely to roast off. Wider tires to concider would be those in the 285+ range on 10.5" deep dish wheels.

Here is a pic of my old Mach1 with 285's on 10.5" deep dish mach wheels.

rear stance (http://i18.photobucket.com/albums/b127/indshadow/Mustang/Wheels004.jpg)

[red99pony]

i already have 10.5 in rims and 315/35/17 bfg kds on there now. i am going to try the 4.10s since they are in there and i am NO fan of wasting money. i just kind of wanted an 03 cobra owner or someone of simular setup to chime in and say what they have experienced. maybe a cobra owner tried 373 and fell in love, maybe one tried 410 and hated it. just kind of wanted to learn from someone elses experience. i am going to do all of the common sense things like tune and try it out as it sits. maybe even some control arms.

[LXtasy]

2v and 4v's have different powerband. But for insight they come with 3.55's stock (03+) and many jump to 4.10's. I have seen some cobra owners run 4.30s and the VERY OCCASIONAL 4.56.

[Illusions]

i already have 10.5 in rims and 315/35/17 bfg kds on there now. i am going to try the 4.10s since they are in there and i am NO fan of wasting money. i just kind of wanted an 03 cobra owner or someone of simular setup to chime in and say what they have experienced. maybe a cobra owner tried 373 and fell in love, maybe one tried 410 and hated it. just kind of wanted to learn from someone elses experience. i am going to do all of the common sense things like tune and try it out as it sits. maybe even some control arms.

check what Magoo runs.

besides I'm slow and barely have enough power to turn the wheels so breaking them loose is out of the question.

[red99pony]

i have he still runs 3.55 but he is making an ass of power