Im having some issues with my twin disc on the street.

Note, my car is 90% street driven. Ill drive it to the track and make a couple passes here and there, trailer a couple of times but most of its action is on the street.

My transmission was just went through, everything is fresh and has less than 500 miles on it.

The Issues-

1- Locking out of First at a dead stop. This issue isn't consitent. Sometimes it will go into first like butter, sometimes it wont go into first at all. When I am at a stop light, I always go into second then first before taking off. I understand a twin disc wears out the dog on the first gear synchro, but locking me out when i only had 200 miles on the new transmission? Hard to beleive it wears out that fast, but could be possible.

2- Locking me out of 2nd from a roll, sometimes at a dead stop. From a dead stop, it sometimes locks me out. Like i said, i go into 2nd then 1st before i am taking off from a stop. Thats what i have been told how to drive with a twin. It locks me out of 2nd from a roll. Two kinds of rolls i am talking about here. Slightly rolling through a stop sign roll, sometimes locks me out, sometimes lets me in. I like to go into second through a stop sign to save the 1st gear dog. Then there is a higher roll, 30-35-40mph. Locks me out completely. Never once let me in so far...

Ive adjusted the master 500 times, have had a clutch stop, nothing seems to fix this.

Clutch Setup- CC Twin Disc (1500-2000 miles throughout 3 years), S2000 Master Cylinder, Steel Braided Line, Used OEM Slave.
Transmission Setup- Stock GSR Gears, M-Factory Diff, All new syncros and sliders.

The car makes 630whp and 480ft on 24psi. I dont drive it at that power level all the time.

My Question out to the Twin Disc users on the street...What is your Master/Slave setup? Have you seen any of these issues? What have you done to fix them?

Options that i am thinking of (would also like some intel if anybody has any)...
-Tilton Release Kit
-CC Stage 4 Single Disc with the Upgraded pressure plate (Buddy got 40-50 Low 10s passes out of his at 670whp before slipping.)

 

Lockout if from clutch not fully disengaging or from the pressure plate re-engaging from the pedal stop not being properly adjusted. When this happens pump the clutch and see if your still locked out. Also push pedal all the way and back off slowly while trying to get into gear. Depending on the outcome will help diagnose your probem

Sounds like a bad master to me. But post up what you find. I'd also install a new slave when you do the master and only do an oem master none of the omni junk or aftermarket oe replacements they're all garbage

 

Did you inspect the floater plate when it was out? This can sometimes cause issues by not fully releasing from a disc.

 

Turbo-LS. I have an OEM s2000 master. I'll play with it a little bit tonight after work. I know the clutch is disengaging all the way, there's no possible way that it isn't. But I could see how it could be pushing too far, where the fingers could be coming in contact with the disc? Is that what you mean by re-engaging?

Everything was looked at closely before installing.

 

sounds like to much pedal travel. I agree, try pushing all the way to the floor and come up slowly while trying to put it in 1st or 2nd at the same time. Do you have the spacer on your S2000 master cylinder?

 

I will most definitely try that once I get home. I'll let you know the outcome.

Yes I do hace the spacer on the s2000 master.

 

Read through this thread a little. Also, if you search around people complain about the same issue without a pedal stop and it's usually a Competition Clutch. Yes, the fingers over extend causing a bind and essentially a re-engagment. I never had issues with my Exedy Twin Disc without a stop. I did however have to shave the TOB collar down (aftermarket TOB).

https://honda-tech.com/drag-racing-3...-stop-2600973/

 

I had a similar issue. It was resolved with the addition of a pedal stop to prevent my clutch pedal from being depressed all the way. GOOD LUCK! I hate these nagging transmission issues.

 

Slowing bring out the pedal while trying to put it into 1st is a no go.

I've had a clutch stop in the past. I had better luck without it.

 

Did the discs measure in spec? Were any of the fingers bent anwhere on the apply or floater ? I know you said you inspected it, but twin discs are rather picky about things...

 

I street driven a twin disc on my 630whp d2b i kind of enjoyed it lmao

 

Discs are practically new, got new ones mid last year. (Note, didn't drive the car that much last year.) All other shifts are great, even fast shifting from 1st to 2nd is like butter.

 

could boil down to being a internal tranny issue. The only time i had this issue was when i installed my omni master cylinder and I had it adjusted wrong, 3rd gear was almost impossible to go in. Read the pdf instruction manual, adjusted properly and been golden ever since.

 

I'm having similar issues did you ever figure out a fix

 

I need help i am having the exact same issue of it locking me out of first or grinding like crazy unless I go into 3rd then to 1st. Please help I have brand new master slave and pedal stop. What else could it be when it's all brand spankin new and worked perfectly the first 50 miles.

 

Integra H motor/trans
New Napa A1 Clutch Cylinder
New Cheaper slave
Rywire line

Key to get things going is to dial in the pedal stop per CC twin disc instructions. I first had issues never dialed it in. Figured was over extending fingers... then did things by the book saw Clutch Cylinder was leaking replaced it. Then made adjustable pedal stop. Adjusted to specs never had an issue since...All I know is I would do the minimums to dial it in... seen some cases adding a valve/restrictor causes more issues... if not 100% quality parts and working....

 

I had the exact same issues with a Clutchmasters 725 with Hybrid discs on a stock gear S4C (B16A) with aftermarket FD. It would lock me out of 2nd on a roll, had to slow down completely go to first and then second would take. Tried the CC pedal stop method as per their article and it didn't solve the issue, only difference was a really artificial pedal feel with on-off like characteristics.

I didn't however have the first lock-out issues you mention.
Just recently we replaced the second gear hub and syncro with an OEM Honda part and presto no more 2nd gear lock-out.

Also found that my car would warp the floater plates after 2 meetings with the thin-style clutch discs. Changed to the 'thick-discs' with corresponding floater and that's holding up. (I'm at a very similar power level to you)

I've always run the 15/16 ABS type Master - for you guys it would be equivalent to the Integra LS one.