I want to do a multiport install on my HFS-5. It seems like I read somewhere before that a single HSV can support 3 nozzles, but this didn't make a lot of sense to me. If I can run 1 or 2 nozzles that add up to 1000-1200cc/min, why can't I run 4 that add up to the same amount? Then again, maybe I'm not recalling what I read properly and running 4 would be just fine. What would be the biggest jets I could run and still support 4 of them on a single HSV? And what restrictor would I use?

Thanks!

One HSV can support flow over 1400cc/min. We used it on a 8s-1/4 Syclone making 1200BHP. Running:

x4 0.4mm inlet manifold
x2 1.0mm post IC
x1 0.6mm pre IC

Running 100% methanol.

We don't bother using the restrictor after 1200cc/min.

That's impressive! From looking at the charts in the manual, I am leaning towards four of the 0.6mm jets which look like they'd flow ~ 1050cc at 30psi (=95psi injection differential pressure). With that configuration, would you recommend a restrictor?

We only supply three sizes, 0.5, 0.7 and 0.9mm. I think you need to drill out the 0.9mm to 1mm. I may make a plot to predict the flow characteristic of the 1mm. At present I am over loaded with work and may not have time to perform more R&D on the other restrictor sizes with various pressures.

Interesting