Cheap EFI

[bill shurvinton]

As a precursor to getting my 13B powered westfield back on the road I'm playing around with various EFI systems. One of the projects in the pipeline is a small mod to a GM unit that would enable a competent type to fuel inject their car for around £100.

I did intend to get an old series one to play with, but am currently banned from collecting any more basket cases until I get both my cars on the road. However, if anyone is interested in this, and preferably close to the hampshire/berkshire/surrey border please let me know.

Bill

[Glenn Butcher]

Hello Bill!

I have heard about you and your car, it sounds like a brilliant thing! It is turbo charged?

A good guy to talk to about this would be Carl on this Forum, I have sent him a message on this Thread.

I think the main problem you will have is getting the plugs to sequentially fire, but you can still have them fire in-line (not the best way to go, but it will work).

One of the cheapest (but very good) ECU's around for a rotary is the Microtech, made in Oz. The worlds fastest 1/4 mile rotary uses one - so they can't be all bad :)

[Carl]

Hi Bill,
I live in Newbury,Berks.
What are you up too?
Regards
Carl

[MikeLMR]

The yanks have done quite abit of work on this and for a 12a engine you can run a racing beat lower intake manifold and use that to bolt the upper manifold and throttle body from an NA FC

12A's have dizzy's to so the ECU need only worry about the fueling

[bill shurvinton]

Hmm,

Always worry when people say they have heared about me:-) The westfield is NA, although I am helping a friend build a turbo II
powered locost, which will in turn probably persuade me to put a turbo in something.

I've been playing with EFI for just over a year now: developments have been somewhat delayed by my 13B throwing an eccentric bearing 300 miles after the initial installation
and moving house but I am catching up now and finally have garage space to play properly. The fuel side of things is easy enough for stock ported engines. although I'm still looking at sequential stuff for bridge-ports. The tricky bit has been finding a DIY solution to the trail timing. I am now at the point where I have 3 options for this about to be bench testing.

The fun for me is taking stuff that you can find in a scrapyard (albeit sometimes an american scrapyard) and turn it into a complete EFI for a rotary.

Hopefully within a month I should have the engine back in and then, once I have it run in, the Mk1 ignition computer will go in.

I'll keep you posted, but in the meantime, any questions please ask

Bill

[bill shurvinton]

Just thought you might be interested in this quote from someone in Florida I have been helping fit EFI to his car (83 12A). The system he is talking about is the megasquirt (www.bgsoflex.com/megasquirt.html)
'I would like to report that I now have my MS project up and running near
perfectly in a daily driver. The hardware part has been done for a
couple of weeks; many thanks to Bruce, Al, Bill S. and Eric F.. I was getting 9.2 second 0-60mph times with the stock carb on an '83 RX-7 w/ only emissions parts removal and an RB header and presilencer. This morning, I was able to record 6.3 seconds 0-60, limited by wheelspin. Much quicker, runs very smooth, exhaust doesn't stink like the carb did. '

This was using a racing beat weber adaptor and a 50DCOE throttle body. Dunno about the adaptor but the throttle body was £80 off a pair I got cheap, injectors were a large box of jelly babies and the HP pump was a scrappy job ( I like Golf ones as they come with integral swirl pot and cost about a tenner. The megasquirt computer, which you assemble yourself is another 80.

I reckon that's pretty cheap performance gains :-)

Bill