Spec 3+ = Crap!
I did find SPEC customer service to be very good on prior issues I had which in the end were not clutch related. the SPEC guy on this forum has responded politely to issues.
I make 400+ Ft lbs to the wheel on a 4400 lb B body running a MT Street and now run the ZOOM HP.
So far no problems but I only have a few thousand mi on it. I will say street maners are better and track use is good.
I see the guys making bigger power on stick cars running a "twin" disc clutch but have no direct experience.
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Car weighs 4400+ LBs, makes about 400 RWHP/TQ so any clutch is going to take a hit.
My 2+ did hold very well...just did not last long. Also had chatter in stop/go traffic unless you are "perfect" on engagement RPM's.
My ZOOM has not seen as many passes yet as the 2+ did but so far is good with street maners being superior over the SPEC
I have driven a B-body with a street twin and it sure has more pedal pressure. That set up requires the McLeod hydraulics to deal with the extra pressure needed for the twin. Only complaints I have heard for people running a twin in a B-body is breaking tranny/rear end parts.
Something has to give and my $02 would be clutch vs hard parts after it.
Do you have a vid of it on Youtube? There is a vid of an Impala SS with a T56 in it cruisin around..
I thought it slipped the last time out but after looking at vids I think it was wheel spin.
Keep in contact with SPEC-01 here on LS1tech, Jeremy is very helpful.





