Direct Port Injection

[cheekychimp]

What is needed to do this properly?

I know fogger nozzles are not recommended, rather jets aimed at the inlet valves, but isn't this potentially as damaging as firing jets into a turbo given how fast the valves are moving in the upper rev range?

I also imagine a setup similar to that used by motorsports (i.e. additional injector per cylinder) would be effective, but is this possible? Whilst cost would no doubt be somewhat restrictive could something like the fiA2 run 4 x HSVs?

I have bosses cast into my intake manifold specifically for direct port injection. It seems a shame not to utilize them, but is it worth the effort to go this route.

Paul.

[simple]

Paul, All you need is to copy fuel injection system. They spray right on valves without any problems.
Your only restriction hire is money. As 4 x HSV and supportive electronics will cost you a bit.
Post some pictures of the set up and piople will come in with some comments!
:smile:

[cheekychimp]

Simple,

I'd love to post a picture of the setup but this is a complete rebuild project and the entire car is stripped down to the chassis at present following spot/seam welding of the frame in preparation to install a cage. Consequently, I'd like to take this opportunity to build the system correctly.

I wouldn't say that 'cost is no object' but with close to ?11,000 invested in the engine and drivetrain alone the additional cost of each HSV over and above what a good quality fuel injector would cost probably still makes it a viable option. If you are injecting water rather than additional fuel anything other than stainless steel is likely to have reliability problems and I doubt a stainless steel injector (if one even exists!) is likely to be any cheaper than an HSV.

This being the case, what I really need to know is if the MF2 or fiA2 could handle the four HSVs in this application.

I'd like to run a supplementary jet pre-compressor to extend the map of the turbo at the end of it's efficiency threshhold and I will probably use propane to increase the octane rating of pump fuel. Consequently the injection at the manifold is mainly to suppress detonation.

Paul.

[simple]

Sound like a interesting project!
Richard (ERL) will have to comment MF2 system capabilitys.

[NAnderson]

Paul,

Nathan (pisces) here from the GVR-4 board. This discussion will get split a bit between here and there, but oh well...

As far as direct port injection, you can use two Aquamist nozzles with a single HSV, so only two HSVs will be needed not four. And driving the HSVs with an FIA2 is a snap to wire up. Unless you're running an aftermarket ECU, the MF2 isn't needed.

If you're still kicking around the idea of running a Shurflo pump with an Aquamist-based system let me know and I'll e-mail you a snazzy wiring/plumbing diagram (different from the one on the GVR-4 board) that sets everything straight.