Bad Harmonic w/ Comptech SC -> Is this normal?
Originally posted by shaner
RT,
I will hurry and get my car back together so I can drive it and see if I get the same problem...
BTW, what is your MAP sesor valve quick fix?
Thanks!
RT,
I will hurry and get my car back together so I can drive it and see if I get the same problem...
BTW, what is your MAP sesor valve quick fix?
Thanks!
The simple solution used by everybody else (Civics, Integras, ....) is to vent the MAP sensor line with a bunch of fish tank aquarium check valves.
In fact, the Comptech NSX SC uses a similar setup to that (they probably get the same check valves but not from the pet store
).Comptech was trying to give us a cleaner more reliable solution than the fish tank effect.
The block between the TB and the MAP is just a custom check valve with a big diaphragm.
To get it to work correctly, a slight, totally reversible, modification (no burned bridges here) is necessary.
If you need, I'll make you a "tweeked" diaphragm and send it to you, free. Swap it out for now until Comptech gets us their solution (again, no permanent irreversible changes).
If I get a chance, I'll give Shad a call next week sometime and share, maybe they'll use it as "their" solution and you'll be one step ahead of it.
Originally posted by RT
The fact that the new pulley isn't balanced with the crank as a unit (it did have balancing holes BTW) shouldn't be a problem or else all the flywheel replacements (TSB and lighter substitutes) would have resulted in similar or worse vibrations.
What do you think?
The fact that the new pulley isn't balanced with the crank as a unit (it did have balancing holes BTW) shouldn't be a problem or else all the flywheel replacements (TSB and lighter substitutes) would have resulted in similar or worse vibrations.
What do you think?
You can usually get away using high quality components that are individually balanced until you run into a harmonic problem. A resonance through the assembly could introduced by adding, subtracting weight, changing the length, or the load.
I would guess than a new flywheel is so close to the stock component (that was probably not balanced with the crank and pulley anyway) that you are well within spec.. and you would think that a different pulley would make little difference. But it is possible that a different design or load on the crank set up a harmonic that needs to be tuned out.
I have seen well built V8
Note: My SC causes more vibration. Nothing wrong with it if you ask me. The shifter vibrates harder, and when I floor it I get a nice vibration out of either the passangers door panel (which has been taken off too many times for speaker replacement), or something under the dash - it sounds cool though.
Wesmaster
Wesmaster





