Originally Posted by Richard L (Post 15941)

1. The HFS-6 cannot reads BMW's piezo electric based injector
2. The HFS-6 does not have signal conditioned MAP sensor input of 2, 3 bar version.
3. The HFS-6 has only one flow table compared to H4's three. Flow ranges, 500, 1200 and 2000cc/min.

That is as much as I can remember at this time of the night/morning. Is there enough to keep you happy. I will check out for more at the office.

Do you want to be on the list, I wasn't sure so I put you on the GB list - nothing is fixed until the closing date.

Originally Posted by JumpingJackson (Post 15955)

Sorry i meant a wiring schematic for mazdaspeed 3/6 :) I assume you can hook up HFS-4 to the high pressure fuel pressure sensor on the rail on this vehicle? its a 0-5v, maxes out at 2075 psi, i have the manufacturers spec sheet for it if that would be helpful

Originally Posted by ARM1NM (Post 15958)

Is pre-turbo injection recommended for turbos with a ceramic turbine wheel? I am trying to maximize the power from a CT20b on my '91 MR2 (Gen2 3S-GTE).

Originally Posted by Dust (Post 15950)

I am looking at a used HFS-6 with push to connects and a red gauge, but buying a blue gauge, and compression fittings and nozzle, and that will put me at $600ish easy on the cheap side. If I am only getting a tweaked HFS-6, then it is one thing, but the list is substantial and applicable to my uses. Small engine with low flow needs now, bigger engine with tuning and higher flow needs later. It seems to fill more roles, better. For an extra $95, I'm in.

Originally Posted by Richard L (Post 15937)

Is there a reason why you are going for direct port?

I was more concernng about the reaction time of the meth delievery. There is delay due to having to purge the air out and to refill a network of hoses due to the syphoning effect of engine vacuum.

If the direct port is being used for suppliementing the lack in capacity of the FSI injectors for high power application, than the installation is quite straight forward. You won't need to trigger the system until mid to high load. Delivery delay is no longer of any concern if you trigger the system slightly earlier.

But if you commencement of the injection id from low to mid load, the delay will affect the smoothness of the delivery because theere isnlt much time between refilling the hoses and spraying. Under this conditions, you must add four checkvalves behind each jet to stop the vacuum from syhoning the fluid out of the hoses.

Here is a link to such as example:
(see a small checkvalve is inserted behind each jet.

http://www.aquamist.co.uk/vbulletin/...p?t=781&page=3

For long term trouble free operation, good filtering is essential.