LCP

In other words, no.

Jason @ Streetwerke

More importantly, I'm using RS4 injectors. That will dictate what water flow is, since the 2d system uses fuel injector pulse width to meter water. If using larger injectors, you may not get the water flow you want due to lower duty cycles.

I'm getting ahead of myself though, since I have a really trick solution for that problem coming! Like I said before, I'll have it ready to market once my shop is all settled and I can dyno tune Aquamist kits. That probably won't happen for a couple months at the earliest. I'll definitely have S4 kits all ready to go for early next year (I know, only Australian folks will need it then).

Mark P

the injector pulse width. No wonder my math wasn't working out as expected. My math was based on constant full-force pumping action through the given size jets. However, the 2d works off of injector duty cycle, so the actual water flow will be some fraction of those calculations, and different at varying RPMs along with the injector duty cycle.

If we were to suppose that I use the blue tuning below, at 5500 RPMs, I'd be at 80% of the flow calculations.

Still though, it seems like the 7-bar race pump can only flow 330 cc/min. Per their manual "When the water flow rate is in excess of 330cc/minute and one water pump is no longer adequate for the application. We have online an example how this can be overcome. (using 2 pumps)"

You're only using one pump, right?

If we use TWO 0.8mm jets, (which each flow 330 cc/min @ 7bar) that suggest 660 cc/min at 100% duty cycle. So we'd need to operate down at 50% duty cycle to be right at the maximum pump flow of 330 cc/min.

So are two 0.8mm starving the pump of water at some point?

I sent you an email earlier as well )

<img src="http://ctny.audiworld.com/mark/s4/misc_data/injector_time_duty.gif">

AntiSocial

You can use dual accumulators or use a better pump. Honestly, I think you'll be fine with one accumulator.

Have you tried using one or are you just whining?

Chuck-S4

Don't forget that the ERL race pump can't delvier more than 350cc w/o a prime pump... I was told...

LCP

"An accumulator" = one accumulator.
"It" = an accumulator.
"Sure, just use 2 in series or step up to a better pump" = A conditional answer, conditioned upon using 2 in series (something new to the equation and different than 1 accumulator, thereby making "sure" a false answer albeit with explanation) or using a better pump (something else new to the equation which also requires something different, thereby making "sure" a false answer as well, also albeit with an explanation). ;-)

To answer your question though, I have not tried an accumulator yet.

AntiSocial

:-)

Geez, one accumulator will probably be enough, but I'm no math whiz.

Man, talk about ****.