injector sizing?

froggy · Post by **froggy** » Sun Sep 23, 2007 1:05 pm

im building a single turbo 3.9 with 9.3 pistons to start with and moderate boost but ultimately i want to use 8.1 pistons and 1bar boost, my turbo is a holset hx35 and the efi is the old lucas flap system hardware running ms for fuel and ignition ,my problem is knowing which injectors to use ?

Post by **katanaman** » Sun Sep 23, 2007 4:25 pm

You have another problem in that the flapper inlet doesn't take the common sized injectors. I would have a search around and see what you can get to fit first as you might be better swapping the inlet for a hotwire one to get a huge choice of injectors.

chodjinn · Post by **chodjinn** » Sun Sep 23, 2007 8:25 pm

and i have a complete reconditioned hotwire manifold/plenum with injectors and fuel rail if ya interested

Eliot · Post by **Eliot** » Sun Sep 23, 2007 9:52 pm

Something like 24 or 26Lb's should get you somewhere 300bhp. megasquirt site has an injector calculator from memory.

I happen to have a set of bosch 26lb'ers hi impedance for £200 - need to double check the flow rate though.

As kataman says, you will need the later hotwire base to use them though.

stevieturbo · Post by **stevieturbo** » Mon Sep 24, 2007 5:36 pm

Get the hotwire manifold and fuel rails, and buy a set of Ford SVO Bosch green 42lb's off ebay.com

Job done, and you wont need to worry about running out of injector for a good while, and they are pretty good value.

froggy · Post by **froggy** » Mon Sep 24, 2007 5:52 pm

cheers chaps, i sold a perfectly good hotwire system last year when i was going to run motorbike carbs