Opinions on inlet manifold and fuel system

[bill shurvinton]

Megasquirt  does fuel for rotaries very nicely. I still need to do some code mods for spark

[MikeLMR]

Will have to order a MS unit from you soon Bill ... if only to get a clearer idea of whats going to involved in fitting it.

Have been trying to source a 10,8mm reamer today for fuel rail holes

[bill shurvinton]

Pretty sure I have a 10.8mm drill somewhere.

Have you located some suitable fuel rails?

[MikeLMR]

not got hold of any yet but found plenty of suppliers.

[bill shurvinton]

let me know what yo decide as I may be ordering some from the USA soon.

Bill

[rxrotary2_7]

let me know if you need any fuel rail. I have a few styles of extrusion or can make them. email me. Keith@KGParts.com

[travellinbob]

hi guys just wondering something about fuel rails. Cant you just make your own to suit your individual application? my old 13bturbo used to run a weber style downdraft throttle body and it had a U shaped fuel rail supplying 4 injectors. Point is, I saw the engine builder bend up and braze the fittings onto the bent tube to make this.
   I am not that clued up on this type of thing and fair enough he was a back yard mechanic but he built some very fast cars.
  cheers,michael.

[MikeLMR]

I think I\'m using a fuel rail off one of my spare 323 Gti heads, it has a 90mm(ish) spacing which is the same as the DCOE manifold + the Denso injectors used on the 323 have the same O ring size as the Keihin ones used on the Suzuki, won\'t be as bling as an alluminium one but its free and ready made.

I will probably swap it for somthing a little tidier once the car is running. I\'ve found some 10mm long M6 threaded spacers (think they are used in computer servers), I\'m not sure if they will work yet but I\'m going to try them out before resorting to making my own spacers.

Another point to note is that the BP engine in my 323 is very similar to an mx5/miata BP engine so I would guess that a fuel rail to suit an MX5 would fit a twin DCOE spaced manifold too. (it\'d be cheaper and more interesting to make my own though)

~ Mike

P.S will post a photo of the "new" fuel rail in mo

[MikeLMR]

fuel rail, will need to make some brackets as unfortunately the Mazda BP engine has the injectors in the head so the brackets are on the wrong side to mount on the throttle body directly

[MikeLMR]

Where all this stuff is going to live (dimensions are only rough)

[Carl]

Great work Mike,
I am keeping track of this as it is developing so please keep it up.
You are going to love it when it is all done!
Kind regards
Carl

[MikeLMR]

I drove my car today and it made me smile ... god knows what it will be like when its actually a little quicker + a lot noisier.

Can\'t wait whats the plan with the exhaust ?

[bill shurvinton]

Originally posted by travellinbob
hi guys just wondering something about fuel rails. Cant you just make your own to suit your individual application? my old 13bturbo used to run a weber style downdraft throttle body and it had a U shaped fuel rail supplying 4 injectors. Point is, I saw the engine builder bend up and braze the fittings onto the bent tube to make this.
   I am not that clued up on this type of thing and fair enough he was a back yard mechanic but he built some very fast cars.
  cheers,michael.

Perfectly acceptable way of doing it IF you are good at welding. Take a look at a fuel rail of a cavalier sometime for an example of this method of construction.

The real secret with EFI conversions on a budget, or at least max bang for the buck stuff is knowing what you can use out the scrappies.

[MikeLMR]

ohhh I\'ve blown the budget now and bought somthing specifically made for my car :o

a surge tank from Tweakit in Aus 90 Aussy dollars

[bill shurvinton]

Traitor