Just put a few more go faster parts into the car. Did heads/cam/intake and a Mantic ER2. Put a couple hundred stop n go miles on the clutch with a base tune(466rwhp/427ftlbs). Have a few gremlins Im plowing through now…one is that the car will not shift over 4000rpm. No grinding, just hits a wall and will not go into the next gear. Don't matter if its 2-3 or 3-4. Once RPM's dip below 4000, it'll click into the next gear and off you go.

If I put the car in gear, depress the clutch and rev to 4000(sitting still)…the car will lurch forward. Clear sign of it not disengaging all the way correct?

Heres my rub…the clutch feels beautiful. No chatter, vibration or smells. Engagement is spot on, pedal feel is literally like factory. A huge surprise for me was how much smoother the trans feels. It was pretty notchy before, tough to get into reverse and 2nd gear sometimes when cold. Pedal stuck to the floor after a good pull. Now hot or cold…trans shifts smooth as butter and sticky pedal is gone.

I used new GM hydraulics(Slave and Master) along with a Tick remote bleeder. I've bled literally a gallon of DOT4 synthetic through the bleeder via a Mityvac as well as the old pedal pump. I know theres a lot of theories and methods but the damn thing can not be this difficult to bleed can it??

The fact that everything feels spot on until higher RPM's leads me to believe its not a clutch defect or something mechanical or am I off there?

I cannot find another example where the ER2 has given somebody else this problem with GM hydraulics. Ive talked to guys local and on this forum, some with way more power than me with absolutely no problem. I want to avoid the Tick MC…call me old, but Im over the heavy clutch pedal stuff(had old 5.0 mustangs for years).

Talked with ECS for a bit…seemed about as perplexed as me and suggested I bleed it and drive it. Im at about 500 miles on the clutch and pretty sure I just killed my mityvac from bleeding the damn thing so much.

Any ideas for disengagement issues other than an aftermarket MC? Driving me up the wall not being able to bang some gears with the new set up

 

its been three or four years since I did my clutch install but if I remember right I measured the air gap on the clutch and shimmed it. No issues. Maybe do a search on air gap. See if that helps. Good luck to you.