7 replies to this topic

[HUBBA.HUBBA]

Any body know what pressure I should set the filterkings pressure regulater to, it's currently at 4 psi (i've got a range of 1- 7psi to play with).
Out of interest what happens if the pressure is too high?

[mike.]

If its too high your float in the carb will overflow out of the overflow pipe on the side of the carb.

I think it needs to be set between 3-3.5psi. I just read it in another thread that thats what an SU carb is designed for.

Edited by mike., 03 September 2010 - 10:20 AM.

[HUBBA.HUBBA]

Thanks Mike. I saw that thread, but wasn't sure if it applied to all SU's. So 4 psi should on the money with tuned engine, I would think.

[Turbo Nick]

yeah should be fine with 4psi, i wouldn't go any higher personally.

[minifan333]

I'm also really interested in this..
are you sure a hif44 carb can go with 3-4 psi?
This facet is ok for hif44+1380 engine?
Thanks

http://www.minisport..._FAC40105K.html

[ukcooper]

Had mine on 2.5 psi at first acted like a limiter at 6500rpm 3 psi was just fine for me - hif44 stage 3 head 1310cc

[HUBBA.HUBBA]

I've been running at 3.5 ever since and it's been fine.

[Cooperman]

I run 3.5 on my 115 bhp 1310 cc 'S' with twin H4 carbs.