High altitude boost problems

[Brooks Ellis <brooks@frii.com>]

>5500rpm.  I live in Colorado Springs and the elevation is about 6500ft.
>Could this be the cause? What kind of boost can I run up here without

Tim - I live north of Fort Collins, at roughly 6000 feet, and could get the
stock setup to do 1.3 bar pretty easily, but getting the full 1.4 was a
little tougher. With a modded WG spring (& ecu) I got 2.0 bar with no
problems. I could hit 2.0 every time.

IMO, the stock spring is a little bit weak, and cracks open a little too
early to get a reliable 1.4. I don't know if it would be possible to
stretch it a little bit to help it out or not.

You could try shimming the spring a wee bit, to give it a little extra
pressure, and perhaps that'll help you attain the proper boost.

Of course, that is all spring stuff. 1.2 is a little low even for that, so
you'd be well advised to check out all of the hoses in the engine. After
that, check out the WOT switch, and other common failure points, because
these little sensors tell the computer if it is ok to at least TRY full
boost or not. If they aren't ALL ok, then you will get lower boost. Check
the archives for things to check, and procedures to check them.

Good luck!
brooks		-fort collins/laporte area, n. colorado, USA-
[ brooks@frii.com    '89.5 200Q @ 1.8    S&W Sigma 9F 17+1 ]