GT2871 USERS. SR motor

[2fast4y0u]

exedy stage one. no problems yet. i love the feel of it too. i had (2) act street disc...and they dont compare at all.

[jspaeth]

I am running an ACT Heavy Duty Pressure Plate, ACT 6-puck spring disc, and ACT 10.5-lb Prolite Flywheel.

At first, that clutch-flywheel combination was hard to get used to, but I daily drive the car, and you get used to it.

Needless to say, I use to have stock flywheel and the Street/Strip disc, and this grabs way harder....that used to slip occasionally, even during the middle of a pull, not just on a gear change.

This NEVER slips.

[mattsil80wis]

Originally Posted by longfellow

What clutches are you guys using on the 2871 set ups?

spec stage 3 with a jwt flywheel

cody is running a jwt 350z clutch with a jwt flywheel

[longfellow]

I think I'm going with Exedy flywheel (14lbs) and stage 2 clutch or a Nismo Coppermix if I can get my hands on one. I've never likes how stiff ACT clutches are and I dont like really light flywheels (sub 12lbs).

[codyace]

The JWT P/P features a sprung organic disk, but has a huge clamping force. It's certainly stiff. The Specs are very light.

[slider2828]

Exedy Stage 1 for a GT2871R? For Realz? a stage 2 can't even hold 250hp.... Come on....

Fidanza flywheel for a RPS Max Turbo Street Disc.... boosting on my car for 1.5 years, tracked and drifted, still holding up fine like day 1.... Will recommend for sure...

[e1_griego]

^I have a 2876 @ 14psi, but I'm running a exedy stage 2, with the ACT Prolite flywheel. Holds power fine, but a bit too chattery for my liking.

[slider2828]

At 14psi how much horsepower is that and how much torque.... You can be running a 2871R untuned and get like 250whp....

Chattery, doesn't that means its on the way out cause its slipping?

[e1_griego]

340/300. Not untuned lol.

Chattery when you try to slip it, like taking off from a stop, etc.

I'm not buying another one, but it holds more than 250 lb/ft is my point.

[longfellow]

Originally Posted by slider2828

Exedy Stage 1 for a GT2871R? For Realz? a stage 2 can't even hold 250hp.... Come on....

Fidanza flywheel for a RPS Max Turbo Street Disc.... boosting on my car for 1.5 years, tracked and drifted, still holding up fine like day 1.... Will recommend for sure...

Exedy Stage 1 is rated to 280lb/ft and a stage 2 is rated at 350lb/ft. Its not that far off. Clutches are not rated for HP either. And like I said a while back RPS clutches are rebranded Exedy units, aka they're the same thing.

Thanks for the info guys, I'll take it into consideration for my upcoming purchase.

[jspaeth]

Originally Posted by longfellow

Exedy Stage 1 is rated to 280lb/ft and a stage 2 is rated at 350lb/ft. Its not that far off. Clutches are not rated for HP either. And like I said a while back RPS clutches are rebranded Exedy units, aka they're the same thing.

Thanks for the info guys, I'll take it into consideration for my upcoming purchase.

True, clutches are rated for torque.


Also, many "stage 2" clutches available are rated in the 300-400 ft-lb zone...

However, it's not always clear whether or not this is as measured at the wheels or at the flywheel.

Accounting for 15% drivetrain loss.....this is ~30-50 ft-lbs.....so "where" the clutch is rated (wheels vs. flywheel) is a VERY relavent topic of discussion for some of these stage 2 clutches.

My old combination (ACT HD PP and Street Disc) was supposedly rated at like 350 or 370 ft-lbs or something.


However, I dynoed a max of 300 ft-lbs on a Dynapack, and occasionally, the clutch would slip.....my guess is that the rating was for tq at the flywheel, not the wheels.

[codyace]

Lets also not forget 'weight' when it comes to torque ratings.

[2fast4y0u]

Originally Posted by slider2828

Exedy Stage 1 for a GT2871R? For Realz? a stage 2 can't even hold 250hp.... Come on....

Fidanza flywheel for a RPS Max Turbo Street Disc.... boosting on my car for 1.5 years, tracked and drifted, still holding up fine like day 1.... Will recommend for sure...

i went out and double checked the box it came in and i was mistaking...its an exedy stage 2
but i swear to you i really dont remember putting in a 3 puck sprung. i can tell you 99% that it is a solid disc.
guess i will wait till i pull the motor in a few weeks to find out.



oh i also have a Fidanza lightweight(8lbs) flywheel. I hate it!

[2fast4y0u]

ok so i just searched google with my part # and its coming up with mixed results...
part # 06950B exedy

thats the clutch im using

[jspaeth]

Originally Posted by 2fast4y0u

i went out and double checked the box it came in and i was mistaking...its an exedy stage 2
but i swear to you i really dont remember putting in a 3 puck sprung. i can tell you 99% that it is a solid disc.
guess i will wait till i pull the motor in a few weeks to find out.



oh i also have a Fidanza lightweight(8lbs) flywheel. I hate it!

Why do you hate the light flywheel?

The ACT is a one piece design, milled from a single piece of steel, I believe....I think the Fidanzas are 2+ pieces

[2fast4y0u]

well i like the fact that it has a replaceable face. but its almost TOO light. car throbs if you try to ease into it and going through a parking lot or something at slow speeds its hard.

i dont daily drive the car so its hard to get used to. once i do get used to it, il be fine.

[longfellow]

Personally for me I've never liked it when my car would zip through the revs. I've driven a few hondas with 8lb flywheels and they totally suck. Less rotational mass makes it harder to slip the clutch in my experience. For street driving I like to be able to slip the clutch in first and second gear when just puttering around town. I'm trying to find a happy medium which is an Exedy 14lb flywheel and a stage 2 clutch.

[2fast4y0u]

well, when i can afford to go to an exedy hyper single i will....but that wont be for awhile.
i have heard nothing but great with that setup but for just over $1000!!! damn thats a lot for a clutch. i guess if you do the math for a flywheel and clutch its not terribile but still, Damn!

[jspaeth]

Originally Posted by 2fast4y0u

well i like the fact that it has a replaceable face. but its almost TOO light. car throbs if you try to ease into it and going through a parking lot or something at slow speeds its hard.

i dont daily drive the car so its hard to get used to. once i do get used to it, il be fine.

Originally Posted by longfellow

Personally for me I've never liked it when my car would zip through the revs. I've driven a few hondas with 8lb flywheels and they totally suck. Less rotational mass makes it harder to slip the clutch in my experience. For street driving I like to be able to slip the clutch in first and second gear when just puttering around town. I'm trying to find a happy medium which is an Exedy 14lb flywheel and a stage 2 clutch.

I have had it for 4 months now and drive the car almost every day. I still stall it every once in a while trying to "ease it" into 1st gear.

You either have to time the throttle PERFECTLY, or you have to be a little rough with it.

As far as launching goes, it just takes getting used to, you really can't slip the clutch at all, so you have to launch from pretty high up (like 6K RPM or so is where I launch from) and then use the throttle to modulate wheelspin through 1st gear.

By no means am I an expert yet though....I don't have any 60' times to prove I even know what I'm talking about haha

[2fast4y0u]

i know what you mean.
when i had Martin @ RS-Enthalpy do my ecu he said he would put in a launch controller set at 5800 rpm because thats the only way your gonna get a good launch. specially on this turbo(2871) otherwise he said to lauch even higher

[slider2828]

I never have a problem with lightness of the flywheel and I have a light shaft with it too... you are supposed to whip through the gears for turbo as this gives you the greatest response.

Torque for clutches are measured at the fly, never at the wheels....

I have had a stage 2 exedy and it didn't last me a year. It was that 3 puck plate....

Exedy rebrands a lot of stuff, but its to manufacturer specifications. So even though it made the pressure plate doesn't mean its the same exedy stage 2 plate.... I drove the 3 puck one for a year and never had a problem driving it even in traffic.

Full face is definitely easier to drive....

2ndly slipping the clutch is NOT based on the flywheel attributes, its based on the friction plate attributes and throbbing means you dropped the clutch too quick, it has nothing to do with the flywheel... Pucks always have a smaller catch zone than full street face, therefore you go with full street face... LIke I said I had both exedy 2 and stock, and RPS.

The best was RPS... Also if RPS max is rated 450 Ft/LB of torque, how is this a rebranded exedy 2?

[longfellow]

Flywheel weight has alot to do with how much you can slip the clutch. If there is less rotating mass then its easier for the clutch plate to lock onto it, ergo less slip more grip. Its harder for a clutch to grab more weight which allows for more easy of slipping the clutch. They design of the clutch also has alot to do with it, but lighter flywheels make it much more difficult.

[codyace]

I've got an 11lb JWT flywheel, and have NEVER had an issue driving the car around with it, even in traffic. I wouldn't ever go back to a big flywheel either, as the light is great with these little turbos that create instant torque. Brings RPM's perfectly down into the sweet spot, and rev matching is a dream.

[jspaeth]

Ok fellas we are getting way off topic here....haha

[2fast4y0u]

good call...how bout those bears

jk


update: i will soon have my tuned ecu back from enthalpy. cant wait. not like im gonna drive my car with the snow and freezing as rain im about to get. but hey, my ecu will be done

[HPballer76]

hey guys i need a quick answer if possible. i didn't think about it until now but will i need an adjustable fpr or will the stock one be fine?

i will be running

2871r .64
hks 264/272
740cc injectors

i can pick up a nismo fpr for a decent price just trying to deicide if i really need it or if i can use the cash elsewhere.

thanks for any help

[S13 curtis]

Originally Posted by HPballer76

hey guys i need a quick answer if possible. i didn't think about it until now but will i need an adjustable fpr or will the stock one be fine?

i will be running

2871r .64
hks 264/272
740cc injectors

i can pick up a nismo fpr for a decent price just trying to deicide if i really need it or if i can use the cash elsewhere.

thanks for any help

stock is fine, thats what i ran and gave me no problems.

[codyace]

I'm always baffled at how you guys have good luck with the stock FPR's...I always upgrade them after watching mine via gauge not keep up how it should...swapped to a nismo, all was gravy.

Plus if you've got a rom tune car that is slightly rich/slightly lean you can make on the spot global corrections via FPR to fix it.

[jspaeth]

Originally Posted by codyace

Plus if you've got a rom tune car that is slightly rich/slightly lean you can make on the spot global corrections via FPR to fix it.

What he said haha

[deukalionS14]

Originally Posted by codyace

I'm always baffled at how you guys have good luck with the stock FPR's...I always upgrade them after watching mine via gauge not keep up how it should...swapped to a nismo, all was gravy.

Plus if you've got a rom tune car that is slightly rich/slightly lean you can make on the spot global corrections via FPR to fix it.

Great answer. when i had my JWT tune i did this to make the tune work perfect