Injectors

mr_bishi · Post by **mr_bishi** » Sat Dec 17, 2005 4:05 am

I recently bought a set of 2nd have Mitsi GTO/3000GT/Dodge Stealth non-turbo 210cc injectors/fuel rail in the hope of replacing the puny 166cc fto injectors,unfortunately they don't even come close to fitting

Does anyone know of any larger injectors that do fit?

RedlineGX · Post by **RedlineGX** » Sat Dec 17, 2005 10:50 am

I'm also looking as well. Bishi I think you are looking for the same reason...posting mine under tech section now...

mr_bishi · Post by **mr_bishi** » Sat Dec 17, 2005 10:21 pm

I'll keep you posted on what i come up with then mate.

Markfto on the uk forum knows of some that'll fit,but for some reason he's not allowed to say which ones

RedlineGX · Post by **RedlineGX** » Sat Dec 17, 2005 11:12 pm

Well that's just wrong...rpw have said they can supply but when asked what type they have yet to reply to me

mr_bishi · Post by **mr_bishi** » Sun Dec 18, 2005 12:49 am

RedlineGX wrote:Well that's just wrong...rpw have said they can supply but when asked what type they have yet to reply to me

Why such a secret??

spetz · Post by **spetz** » Sun Dec 18, 2005 1:48 am

I thought FTO injectors were already 210cc
Same as the 4G93 and 6G7X series of injectors?

What about using 1.6 MIVEC injectors? They are 275cc
Or 4G93T/4G61T ones 390cc

mr_bishi · Post by **mr_bishi** » Sun Dec 18, 2005 2:10 am

spetz wrote:I thought FTO injectors were already 210cc
Same as the 4G93 and 6G7X series of injectors?

What about using 1.6 MIVEC injectors? They are 275cc
Or 4G93T/4G61T ones 390cc

FTO v6 are definately 166cc. I'm assuming they'll be the same as the Galant v6 sport too?

I like the sound of the 1.6 mivec ones....that might be the way forward!

Do you know what the fto gs runs?

spetz · Post by **spetz** » Sun Dec 18, 2005 2:43 pm

How do you know they are 166cc for sure?

Places can modify standard injectors to up their flow.

Alternatively if you already have 6 injectors which you are happy with, it may pay to see how much modifying or custom making a new fuel rail would be?

GS is the 4G93 SOHC? If so then they have 210cc, same as magna, which I thought was the same as FTO.

Post by **Bennoz** » Sun Dec 18, 2005 3:02 pm

The FTO fuel system is over designed to buggery. Unless your planning on forcing air in there the standard ones will cope. They are said to be only ever hitting 60% capacity a full throttle. Stock ones are 166cc

There's an intersting read in regard to Mitsubishi Fuel systems in the turbo article on the FTO Ireland site.

mr_bishi · Post by **mr_bishi** » Mon Dec 19, 2005 2:24 am

spetz wrote:How do you know they are 166cc for sure?

They've got 166cc printed on them.

Bennoz wrote:There's an intersting read in regard to Mitsubishi Fuel systems in the turbo article on the FTO Ireland site.

Yeah i saw that......quite surprising really. I'd have just liked some more headroom with it if it could be done cheaply.

dannyboyau · Post by **dannyboyau** » Mon Dec 19, 2005 3:57 am

i can get 390cc injectors, direct fit 120 each

RedlineGX · Post by **RedlineGX** » Mon Dec 19, 2005 4:16 am

Nice....anything smaller though, thats a bit too large for my expected level of mods....almost 2.5 times the size currently.
Also would they use more fuel or still be restriced via a management system?

I was hoping the upgraded pump and regulator would squeeze an additional 10% or so from the standard injectors.

spetz · Post by **spetz** » Mon Dec 19, 2005 11:59 am

You would need something like an e-manage to compensate for larger injectors. Otherwise with standard ECU the engine will just flood.

What mods are you planning on doing? I read an artical on someone with a turbo FTO running standard injectors at 6psi.

If you are staying NA, I think a FPR, with an e-manage should be able to fuel the engine right unless it's really off it's head with NA parts.

Just look into SOHC 4G93 injectors. They should be easy to find, or even if you have a friend with a lancer, or magna you can try swapping them?

Check if the impedance is right and so on as well though

mr_bishi · Post by **mr_bishi** » Mon Dec 19, 2005 6:20 pm

I've just read an interesting article about injectors saying that the flow can be increased quite a bit by raising the fuel pressure.You also get better fuel atomisation this way too.

spetz · Post by **spetz** » Tue Dec 20, 2005 1:13 am

After just re-reading your first post...

If you got GTO injectors, which I assume are the same as Magna injectors (6G72) which are the same as the 4G93 SOHC injectors, which should be same size as 4G92 MIVEC injectors, and GSR injectors are slightly different but the same as 4G63 injectors...

So basically no Mitsubishi injectors fit? That can't be right?

khunjeng · Post by **khunjeng** » Tue Dec 20, 2005 4:12 pm

buy useing a FPR or chnaging the flow/density wotever you need to up the air flow obviously...you are going to need to piggy-back the ECU to compensate as the stock ECU as mentioned before wont be able to handle the air/fuel ratios I assume. However i have never done it

Post by **Bennoz** » Tue Dec 20, 2005 4:45 pm

Not neccesarily, the stock ECU will compensate for some air & fuel increases. Hence no-one has any ECU issues when the wack on a big CAI. There is some give in the OEM ECU, they have some intelligence

Having said that, having a piggy back or aftermarket ECU will allow for a much more finite tune with those mods in mind.

khunjeng · Post by **khunjeng** » Tue Dec 20, 2005 4:57 pm

ya..I think so... Once you start wacking on over-sized injectors etc you might need a little extra help to ensure enough air is mixed..but I'm not sure how much the ECU can compensate...but it would make sense it could do a fair bit.

mr_bishi · Post by **mr_bishi** » Tue Dec 20, 2005 6:29 pm

For normal small mods i wouldn't recommend changing the injectors at all,my 75bhp dry nitrous kit worked ok with the standard injectors (it didn't actually deliver 75 bhp though) The only reason you'd need bigger injectors would be for forced induction or some serious n/a tuning like throttle bodies,wild cams head work etc.

Like Ben said the standard fuel system is only running at 60% so in theory you should be able to squeeze 80bhp out of it (probably not in reality though)

The ecu is good at coping at fairly small adjustments too because it's designed to work at all different altitudes the car maybe driven at where the air density changes.

spetz · Post by **spetz** » Thu Dec 22, 2005 9:13 pm

I think a stock ECU will definately not cope with upgraded injectors... or rather not cope with injectors worthwhile putting in