i have a 2000 trailblazer with a hpd pipe kit (pipe, silencer, jet kit, and clutch kit) and it didnt give me anywhere near the power everyone (including hpd) said it would, someone told me if the clutch was not properly installed it would cause power problems. so could someone please tell me what may be wrong and how to tell if its wrong and fix it. i do not know what was done or not done when the clutch kit was installed because a friend of mine who claimed he knew what he was doing did it, which may be my problem. so someone please help me straighten out my clutch.
thanks

 

Get a tachometer and find out the pipe's RPM and what the clutch shifts out at to see if they are in sync.If not,you'll have to find the wieghts and spring to make the shift out occur at HP making RPM.

 

im assuming the problem is not the clutch but not being properly installed would there be anything with the installation that could do this, i was told if either the helix or one of the springs is not rotated or turned the right way it will cause loss of power does anyone know of this and how do i fix it?

 

If you got your clutch kit from HPD. I would call them
to see what their secondary spring setting is supposed
to be. The stock setting for the Driven clutch is 2-2,
that is, the spring goes in the #2 hole in the helix
and the other end of the spring goes in the #2 hole of
the moveable sheave.
You will have to take the black plastic clutch cover off.
The Driven clutch is the big wheel looking thing with a
black belt between it. Take the belt off. Now remove the
hex head bolt that holds the moveable sheave (big wheel thing)
and pull the whole thing straight off. Now the fun part!
You will need someone to help you. When you flip the sheave
over you will see the helix. Its held in place with a snapring.
You have to push down on the outer part of the sheave enough to
get the snapring off. THE HELIX IS UNDER SOME PRESSURE!
But before you tale it off look at the two holes #1-2, there
should be the end of a spring sticking out of one of those two
holes. Remember that! Now, remove the snapring. The helix will
want to turn and push out. Let it but slowly. Now you can look
under the helx to see the spring. The other end of the spring
is in a numbered hole. Now if you called HPD or saved your
instructions you can tell if your spring is in the correct postion
or if you did not feel any tension from the helix. You would
know that there was not enough tension applied when it was re-
installed. The Helix does require 1/3 turn counter clock wise
when you re-install the helix.
Again, you will need some help to turn the helix and push it
down to get the snapring back on. The rest is just a reverse
of the order it was removed. Sorry, I don't remember the torque
for the hex bolt. If I missed something, I sure someone will
correct me. Hope this was the problem!
HPD-Phone: 763-389-3336

 

it sounds to me like when the seconadry clutch spring (the one with the hole slots thus mentioned) was installed they wound it in the wrong direction.
the spring should be wound in the direction of the coils soo that the spring tightens up.

A few tips:
make sure the lil plastic helix buttons are in good shape..
and when installing the helix and spring onto the sheaves, line up the slots on the spines, and push the helic down 1/4 of an inch, the rotate the helix "in the right direction" 1/3 turn soo that helix "ramps" rotate to the backside of the "plastic buttons".
the push the helix all the way down and pop on the snap ring.
to hold the sheaves and push down on the helix,and apply the snap ring may require two people.

 

ohh yeah, the two "sheaves" that ride against the belt, shouldn't have any freeplay when you are done.
It should take a good bit of force to be able to rotate one sheave while holding the other.

 

thanks a million for the help
i didnt think anyone was ever gonna reply and help me out
ill call hpd tomorrow and let ya know if everything was ok or not

thanks again

 

finally got around to calling HPD
they said my secondary clutch needed shimmed. and anyone tell me how to do this and how much it would cost??

 

it sounds like any of the above could be the problem. if you don't preload the clutch as mentioned, it won't make power like it should. i had my secondary apart last week and forgot to do this resulting in a thump when i hit the throttle. if your belt has been burned, slipped, or just worn out it won't produce good bottom end torque either.
just trying to help.

 

If HPD told you that you need to shim the clutch. I beleave that
you need a clutch alignment tool and the shims. I may be wrong.
HPD should have the shims. Or try Hotseat Performance-------
www.hotseatperformance.com---------Phone #651-982-0600-----
they have the clutch tool and the shims.
If you had the driven clutch off,look at the shaft it was on. It should have
atleast one shim already. (A LARGE WASHER LOOKING THING WITH A LARGE
HOLE THROUGH THE MIDDLE). Anyway I think you can put up to 3
of these shims on. If you call HPD or Hotseat they can give
you a step by step procedure.