StavFC

As title really, I thought I sold these when I sold the V8 they was going on, but obviosuly I didnt, they was in the box with the rest of the Aeromotive fuel system

Anyhow, they are 8x Bosch white/grey tops, 0 280 150 846, all brand new and boxed. IIRC these arent even available anymore.

For the power I want it (ideally 500bhp+, but we will see), it looks like I'll be wanting more fuel, and looks like my car is running stock primaries and 1000cc secondaries at the mo, so these will come in handy, but what should i do?

These do fit in the stock T2 manifold, right? Would I be best running the 1000s as primaries and the 1600s as secondaries?

Other option (which I kinda like to remove clutter etc) is to go to a ProJay style manifold and 4 or even 8 of the 1600s I have, and sell whats currently on there.

BUT Am I right in saying 1600s run like **** as primaries? Or is it, like a lot of cars ive had in the past, where some claim you cant get a certain size injector to idle, then someone who can actually map good gets the car idling fine even on injectors 3 times the size, lol

I dont mind a 1500rpm idle, I dont mind a lumpy idle, I dont mind poor mpg, I just want it to start without flooding all the time, and dont want it to constantly foul the plugs, as it does both of them too much already!

Any advice/experience welcome

arghx

iTrader: (3)

I have the white/gray Bosch injectors you are referring to. They don't fit in either stock rail. They have a bigger diameter at the top. Some have modified them however. They will fit in the actual manifold as long as you remove the lower Bosch pintle cap and o ring and replace it with an s5 pintle cap and grommet.

You don't want 1680s in the primary position unless you have an E85 setup.

StavFC

Good info, I thought as much to be honest.

How big can you go primary and keep the car with the ability to cold start and idle?

turbotoaster

it all depends on the type of injector to be fair stav.

You could go for 2000cc injectors in the primary if you went for ID2000 but obviously you dont need to.

would 850cc secondary injectors off an fd possibly work, we use them in our primarys when we need more power, the idle isnt amazing but they are cheap and havent heard flooding problems with them.

you need about 4420cc of injector for 520bhp with bit of safety(ie not running them flat out)

stock primarys plus 2x1600cc would be close at 4300cc so with a bit of an increase in fuel pressure id say you would be fine

Maybe ask ross at dragon and see what he says.

p.s ordering my intercooler/rad setup for my 200mph car so its coming along very slowly, will send you an email when ive got a bit more done

fritts

iTrader: (5)

You can get 160 lb injectors to idle with gas at least the Indy blue 160 lbers. Lean idle can be achieved by playing with the ignition timing and injection timing. I haven't tried the other versions and have not heard good things with them at low openings. I was at 1000 rpm and around 12.5 afrs but my engine is rather lopey. You will need an ecu that controls idle properly I would say is the biggest factor. I'm not a fan of the PFC and using negative lag numbers in this area.

arghx

iTrader: (3)

yes the PFC is not the ECU to use with 1680 primaries.

StavFC

Cheers for the replies so far, really appreciated

I didnt realise FDs had such big secondaries, and good info on fuel per power thing too.

With a decent ECU (im on HKS F-Con Pro V but would prob change it when upgrade the inj to something with more useability) would the 1600s be possible to idle and run ok at low rpm if mapped well? I dont mind rich, lopey, or high, I just want it to start and not flood!

If 850s as primaries can work even on a PFC, im sure at least my current secondaries, which I think are 1000s (not sure what the primaries are, struggle to see, and not 100% on the secondaries either, just going by colour) would be about ok as primaries with decent mapping, saving me cash/effort.

I really need to see exactly what inj im running at the mo as the car survived at least four 3rd and 4th gear hard runs at 1.6bar on the T04E when the boost controller went crazy, and thatd need a lot of fuel to not det and die...

I take it im best off just getting the rail custom modded to fit the 1600s, or can I get the right rail?

turbotoaster

http://www.rx7store.net/product_p/extremefuel.htm

looking at that kit steve they are using a kg parts rail for the secondary 1600s.

they also sell the rail separately at $150 so you could just order that, stick your 1600cc ones in and away you go.

I wouldnt advise you run the 1600cc in the primary as you wont be able to get it to idle properly at all, i know you mentioned your not bothered about lumpy idle but i can see you easily flooding it with them, if you were running on E85 fuel i would consider it if your desperate but wouldnt recommend it.

ill probably have a set of 850cc secondarys going when i get my 2000cc injectors you can have for nowt, though will be a few months away, your 1000cc will work in your primarys but you might have to get a special rail made up for it, thats where my knowledge runs out.

if you want a primary rail making though i know a guy who makes secondary rails in the uk who could knock you one up