December 11, 2018, 02:00:47 PM

Author Topic: Clutches for 450whp LS2 + traction problems  (Read 602 times)

Offline yusoslo

Clutches for 450whp LS2 + traction problems
« on: October 08, 2018, 07:32:17 PM »
Hello everyone. I recently picked up a beautiful FD with a nicely built LS2. It makes 419 whp on a mustang dyno but the clutch is slipping bad in 3rd-6th. It has a spec clutch. :(
I am looking to weekend drive, auto-x, and road race the car
Clutches I have looked at are LS7 (seems I am at its max power limits)
or
Monster stage 2
I am very temped to get a light weight flywheel. I would love to have a rev happy V8 and also reducing wheels spin during shifts is a plus for me.

Lastly the car has 5-6 year old 200 tread wear 275 mm Dunlop Z1 and it spins very easily, I am sure it is the age of the tire. I need the stickiest for the track and reducing wheel spin.
I am looking at RE71 or 888R
Seems the RE71 is better behaved on the  street.

Any input would be great.

PS. I will also be doing major heat shielding when pulling the trans. Lizard Skin ceramic paint, DEI heat sheild, and wrapping the Y pipe (headers are wrapped) I have thought about using gold foil tape on the bell housing to refract the heat away from the clutch. Is this a good or bad idea?

Thanks for the help.

Offline paul_3rdgen

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Re: Clutches for 450whp LS2 + traction problems
« Reply #1 on: October 08, 2018, 08:41:14 PM »
Get a good clutch, you wonít regret it.  Second thing, you need a sticky tire for these cars all the time.  Go with a r888 or a nitto nto1


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93 RX7 R1 500rwhp
LS2, H/C combo... ARE drysump
Race Logic traction Control and 4 wheel Stoptech BBK
3.73 gears installed in the stock diff  :o

Offline Cobranut

Re: Clutches for 450whp LS2 + traction problems
« Reply #2 on: October 08, 2018, 08:53:17 PM »
I have the low mileage LS-7 clutch and flywheel that was on my stroked LS-3.
It engages very smoothly, and held at 540rwhp with no issues.

I'll take $150 for the set.

David
1995 FD, 7.0 Liter stroked LS3, T56, 8.8, Samberg kit.

Offline jwvand02

Re: Clutches for 450whp LS2 + traction problems
« Reply #3 on: October 08, 2018, 10:14:01 PM »
Get a good clutch, you wonít regret it.  Second thing, you need a sticky tire for these cars all the time.  Go with a r888 or a nitto nto1


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RE-71 is equivalent and often faster than NT01 and R888, despite the higher treadwear rating.

Offline largeorangefont

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Re: Clutches for 450whp LS2 + traction problems
« Reply #4 on: October 09, 2018, 12:18:21 AM »
Get a good clutch, you wonít regret it.  Second thing, you need a sticky tire for these cars all the time.  Go with a r888 or a nitto nto1


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RE-71 is equivalent and often faster than NT01 and R888, despite the higher treadwear rating.

For a few heat cycles... then they fall off typically.
Quote from: cool
Sell it to spacevomit.  He'll finish it.

Offline yusoslo

Re: Clutches for 450whp LS2 + traction problems
« Reply #5 on: October 09, 2018, 07:01:48 AM »
I have the low mileage LS-7 clutch and flywheel that was on my stroked LS-3.
It engages very smoothly, and held at 540rwhp with no issues.

I'll take $150 for the set.

David

David, that is a very fair price. What mileage was on this setup and why did you take it off? What did you replace it with?
$ is not the issue as I am already paying someone $600 for the clutch job, so I dont want to spend $150 in parts to then 1 year later pay $600 in labor to then put in another clutch (monster stage 2 $800). I want it done right the 1st time.

Online wickedrx7

Re: Clutches for 450whp LS2 + traction problems
« Reply #6 on: October 09, 2018, 08:41:40 AM »
I have a Ls7 clutch with a 475 RWHP LS3 and it has lasted longer than I expected.  It will hold the power but I did get it to slip trying 2nd gear launches at the drag strip.  I suspect it would have slipped if I was running stickier tires.  (only could manage 2.2 60 foot on start spec tires) When I finally go Magnum, I will be upgrading as I suspect it is pretty worn after 5K hard miles. 

As for tires, I think a good review to read would be @kinger of the NTO1.  This will most likely be the next set of tires I get.   

1993 Touring, 2012 L99, T-56, Ronnin 8.8, Ohlins, Speedhut, Samberg and lots of custom parts
Build Thread - http://www.norotors.com/index.php?topic=19354.0
Pictures - www.flikr.com/wickedrx7

Offline Cobranut

Re: Clutches for 450whp LS2 + traction problems
« Reply #7 on: October 10, 2018, 09:44:19 PM »
I have the low mileage LS-7 clutch and flywheel that was on my stroked LS-3.
It engages very smoothly, and held at 540rwhp with no issues.

I'll take $150 for the set.

David

David, that is a very fair price. What mileage was on this setup and why did you take it off? What did you replace it with?
$ is not the issue as I am already paying someone $600 for the clutch job, so I dont want to spend $150 in parts to then 1 year later pay $600 in labor to then put in another clutch (monster stage 2 $800). I want it done right the 1st time.

It was on the car when I bought it.  I don't know the exact mileage.
The swap has about 15K on it total, but it was originally built with a SPEC clutch and an aluminum flywheel.
The LS7 setup was swapped in sometime before I bought the car. 
I only put about 1,000 miles on it myself.  I suspect total is 5 to 10K, as it shows very little wear, and no abnormal marks.
I swapped it to go to an aluminum flywheel, and wanted to try a twin disk setup. 
I put in a McLeod RXT clutch and aluminum FW, which made the car rev quicker, but it's a lot trickier to drive smoothly, and the idle is much less stable with the lighter setup.
« Last Edit: October 11, 2018, 03:32:40 PM by Cobranut »
1995 FD, 7.0 Liter stroked LS3, T56, 8.8, Samberg kit.

Offline largeorangefont

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Re: Clutches for 450whp LS2 + traction problems
« Reply #8 on: October 10, 2018, 10:20:38 PM »
Aluminum flywheel and Spec stage 3 here. Itís aggressive but works great.

Clutch discussions are like a religious debate. I have not had a single issue with my Spec.
Quote from: cool
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Offline ZDan

Re: Clutches for 450whp LS2 + traction problems
« Reply #9 on: October 11, 2018, 11:27:15 AM »
McLeod dual-disk RST clutch works great for my 6.8 liter LS3 :)

RE-71 is equivalent and often faster than NT01 and R888, despite the higher treadwear rating.
Depends on the car.  On my BRZ, RE71R is equivalent to NT01, maybe even faster at the track.  On a car with some cojones, NT01 puts the power down way way better.  I tried RE71R on the FD and they would just spin exiting 2nd gear corners at the track.  Eroded the rears to the treadwear indicators in one day!  NT01s give way better drive AND have much longer life if track time is involved.

NT01 became my default street/track tire on the FD, I love them.  I don't know anything about the R888R, but I hated the R888 when I ran it on my S2000.  Loud as hell, harsh feeling but also numb.  Bleh...
'94 RX-7 / 6.8 LS3 / T56 Magnum
0-184.8 in 5280'  :)  (with the old 6.0...)

Offline gnx7

Re: Clutches for 450whp LS2 + traction problems
« Reply #10 on: October 11, 2018, 02:07:34 PM »
I love the NT01 tire..... 

LS7 with an aluminum flywheel is great to around 500rwhp (Dynojet) properly broken in....

If you have the money get a twin disc :).  I sell the McLeod RST and RXT clutches and love either one depending upon application.
'93 FD: 441ci/AllPro LS7 heads/intake en route, T56 Mag, 8.8" IRS, HolleyHP, DavisTechTC 10.32@137mph cats/full exhaust. 165mph 1/2 mile (old LS7)
'93 FD LS9 turbo, T56 Mag, Samberg 8.8" solid axle, 9.35@163mph 197mph 1/2 mile
`69 Chevelle: alum 5.3, GTS76 turbo, ChiseledPerf A/W, T56 Magnum,Ford 35 spline 9".CTS-V interior http://www.norotors.com/index.php?topic=18234.0
old yellar....440rwhp/FD sold but not forgotten: http://www.ponycars.net/scc.htm
I sell new T56 Magnums/McLeod clutch/T56 rebuild kits/Holley EFI/FIC injectors and all BrianTooleyRacing parts.  norcalmotorsport@gmail.com

Offline Exidous

Re: Clutches for 450whp LS2 + traction problems
« Reply #11 on: October 11, 2018, 11:04:59 PM »
100% if you have the money get a twin disk. All the holding power you'd need N/A and drives like stock (organic/carbon).

I really like my Yoko ado8r's. Not too much track time. Just 4 nurburgring laps. As long as it's warm out they barely slip in 1-2 with a 295 wide. 460-480rwhp.
94 BB SBE LS1 Full Mamo top, MS3ProU with TC, RONIN 8.8 and another custom dual 2.5" stainless exhaust. Too loud, need bigger muffler....

Offline kinger

Re: Clutches for 450whp LS2 + traction problems
« Reply #12 on: October 26, 2018, 10:32:54 AM »
Monster stage 2.5 I think and about that 450 Whp now with NT01 that are almost impossible to break free.  Clutch is awesome. 
93 Touring, 6.2L, 415/425 Whp/Wtq, 8.8, samberg everything, AC, PS, TC, Cruise, LED Tails, HID head lights, immaculate interior and paint.

Offline yusoslo

Re: Clutches for 450whp LS2 + traction problems
« Reply #13 on: October 27, 2018, 08:28:23 PM »
I spoke with the owner of Monster. He recommended the twin disc LT1-s with light weight 18lb flywheel.
I like the idea of all the mass in the center and having 2 clutches.

I will be going this route.
I have not seen a stage 2.5.

Offline Exidous

Re: Clutches for 450whp LS2 + traction problems
« Reply #14 on: November 09, 2018, 12:13:48 AM »
Even with the 18lb, the LT1s is still heavy. Well over 40lb. I have one and love it. Just wish it were in the 30's.
94 BB SBE LS1 Full Mamo top, MS3ProU with TC, RONIN 8.8 and another custom dual 2.5" stainless exhaust. Too loud, need bigger muffler....