Wur adjustment

[Mario Motta]

I seted up my idle at 15:1
On cruise i have 13.8:1
On boost afr drops to 10.4:1

Should i rise the warm pressure and then adjust the idle with the mixture screw? Is the enrichment boost affected by rising the warm pressure or i have to reduce the gap of the bottom stop?
Thanks in advance

[timspu]

Firstly i would advise getting some pressure gauges and setting the WUR to base settings as per the manual. Once you know where you are start the engine and check cold start AFR and let engine warm up and adjust idle to 13.4 to 13.8 or where you think it runs the smoothest.
Now check your AFR's , cruise should be in the 14's and boost depending on which gear could well be mid 10's leaning off to 12 AFR ( in a perfect world of course)

If you don't have gauges, set idle to 13.4 to 13.8 and then see what your cruise AFR's are. With the WUR adjuster facing you, turn the allen screw clockwise to raise pressure (Leaner) anti clockwise to lower pressure ( Richer) Small increments at first . All adjustment affect each other.
If you lean warm cruise it will also lean off boost enrichment. Its a fiddly game. Enjoy.

[Alan L]

+1 on above - good advice. but it is common for a very rich boost dump - these things are not perfect. That is why there are some modified WURs which delay the boost dump until the revs are higher. But when it dumps at 10.4, it should start climbing up (leaning) as the revs climb?
Alan

[Mario Motta]

Thanks Guys i'll try