numbers from techtom cmx-100

spdracer@mail.utexas.edu spdracer@mail.utexas.edu
Thu, 12 Sep 2002 23:36:23 -0500


I got some interesting numbers tonight with the cmx-100.  Running about 10psi
(I say about because I don't think my gauge is that accurate and I think the
boost flucuates a bit, digital readout by the way), I hit 5.11v on the Air flow
meter, 100% duty cycle.  At the stock boost(which I think flucuates again a
bit), say around ~4.95v, and 91-95% duty cycle.

Well, I guess I found the limits!  This is my setup:
extrude honed BB manifold, t25, S3 cams and JWT cams gears to reduce overlap,
JWT ecu, fried catalytic converter (smellin a bit after some hard driving
tonight, killed it after running smoke cloud rich for a few thousand), greddy
60mm exhaust, big front mount, HKS EVC boost controller.

I wonder how the fuel pump is holding up........ I was going to get a 3"
exhaust but whats the point now?  I'm already at the limits and the bigger
exhaust will just push it over more.

As for coolant temps, I was seeing around 180 on the highway and up to 200 when
not moving quickly (80's outside temp).  I cranked the heater on full blast to
see what it would do and the coolant temps dropped ~5 degrees.  This was
driving constant speed(cruise control) at about 40 mph.

And the speed reads about 3 mph lower than the speedo which makes it more
accurate.  Whenever I drive by those rader speed limit signs, my speedo is
always 4-5 higher.

Khiem