A few questions about 380 fuel injectors (and yes, I have searched, but couldn't find answers to my questions).

What flow rate are the stock injectors?

Would my mildy modified NA 380 benefit at all from slightly higher flowing injectors? I doubt it would, but asking anyway.

Do any reasonably priced aftermarket or non-Mitsu injectors fit & work (i'm thinking generic Bosch injectors)?

I'm trying to solve my ticking noise problem and I've nothing left to try other than replacing the stock injectors.

But might as well kill two birds with one stone if I can replace them with better or equal injectors at a good price.

So I'm after ideas for replacements.

RC Hills sell injectors for the 6g75, $140 US. I am not sure that is just for one or the whole 6.

http://www.rchillmitsubishi.com/parts/order-form.htm

RC Hills sell injectors for the 6g75, $140 US. I am not sure that is just for one or the whole 6.

http://www.rchillmitsubishi.com/parts/order-form.htm

Thanks Braedz, knew about RCHill but didn't think to check their site.
Just emailed them with some questions about the Galant injectors.
If it is US$140.20 for all six & not just one, then given the current exchange rate that's a bargain.

I wouldn't be ordering Galant injectors unless you know their fuel rail setup is the same as ours. The bosch you mentioned won't fit as they are larger physically. Stock flow is 305cc & going bigger N/A wouldn't make a difference it would just mean you would have to get the exede retuned to scale back the fuel.

Unless you are hitting 85+% duty cycle on the injectors there is absolutely no need to run bigger flow rate ones. Even if you are hitting up to 100% DC, providing you don't spend heaps of time at max duty cycle it's not a problem.

Bigger injectors will do nothing.

As a guide, on a 6cyl, the injector flowrate in CC is roughly equal to the amount of HP they will support - ie 305cc injectors =305hp flywheel

(it doesn't work that way on 4's or 8's - it just happens to for 6's)

If you want to run new injectors, you'll need to match the injector resistance for the driver to work properly. In addition, it'll depend on how sensitive the Bosch ECU is to different injectors - although if you have an interceptor you can adjust anyway.

These (http://www.injectorsonline.com/indivprod.php?cid=73&filter=MITSUBISHI) or http://www.efihardware.com/index.php guys may be good places to start.

Another option could be to have them ultrasonically cleaned.

Have you deduced conclusively that it is an injector? If the ticking is matching engine RPM it'll just be one injector, and you should be able to work out which one using a mechanics stethoscope in one ear and your other ear free.

If you can't match the noise exactly like that, then it's something else.

Thanks for the replies guys.

I've asked RCHill if the US Galant injectors fit an Oz 6G75, I'll wait and see what they say.

And I don't quite have 305hp at the fly, so no point going to larger or higher flowing injectors.

Oh yeah - the other way to find if it's one of the injectors is to pull the plug off the back of the injectors one at a time and listen.

It may cause it to throw a code, but it won't hurt it at all.

As a guide, on a 6cyl, the injector flowrate in CC is roughly equal to the amount of HP they will support - ie 305cc injectors =305hp flywheel

.


Hmmm...Sprintex fit an additional 7th injector in spite of being well under the formula you just described.....

In a production car or system like the sprintex kit they'll generally stick to the 80% duty cycle rule, whereas that rule of thumb assumes 100%.
You only need to worry about big duty cycle if the motor spends long periods at max load or if it is running lean even with the injectors at 100%.
It would be negligent for a company to sell a car or a system with injectors at 100% DC, but if it's for drag, dyno pulls or street driving you can get away with near 100% DC no worries.

Hmmm...Sprintex fit an additional 7th injector in spite of being well under the formula you just described.....

Not wanting to spam thread here, but sprinex fit the 7th injector for a couple of reasons - helps cool the intake charge as it gets compressed, helps seal the rotors slightly too.

When cruising along at say - 100KM/hr (just cruising - not accelerating) the 7th isnt firing, it pretty much just running off your normal 6 injectors.
(for reference - my car gets the same highway economy if not better with the blower on top of it!)
Also - more air = the need for more fuel to burn with said air.
Perhaps the cc = HP rule, varies slightly when you add boost to the equation - as your fuel requirements do not stay linear when your coming up on boost.

Open to correction of course :)

Having a lot of fuel running through your engine - is not healthy for things like engine oil (and bearings) and piston rings / walls etc...

The way I see the fuel injector thing - If you arnt chasing more power out of the engine now or in the future, why do you need bigger injectors?

Hmmm...Sprintex fit an additional 7th injector in spite of being well under the formula you just described.....

Besides the cooling etc etc as Janome stated :P I would have around 350HP at the flywheel so the 305's have no hope in hell as I only have 6 injectors now! My injectors are 430cc which I'm running around 80% if that calculation is correct.

Besides the cooling etc etc as Janome stated :P I would have around 350HP at the flywheel so the 305's have no hope in hell as I only have 6 injectors now! My injectors are 430cc which I'm running around 80% if that calculation is correct.


You reckon you got 261kw at the flywheel?

(350x0.746) You losing almost 70kw through the drivetrain? ....nahhh...something's not right.

I was convinced that the fuel pump limitation is the biggest problem with the 380....

Just got a reply from RCHill.

US$140.20 for ONE injector!!!!

They didn't bother to answer my question about whether or not they fit the Oz 6G75, wonder why?

Makes the local Mitsu dealer price seem a little less OTT.

These have gotta be the world's most expensive injectors.

Don't think I'll be buying any soon at those prices.

Yeah - that's pretty std pricing for oem injectors.

Besides the cooling etc etc as Janome stated :P I would have around 350HP at the flywheel so the 305's have no hope in hell as I only have 6 injectors now! My injectors are 430cc which I'm running around 80% if that calculation is correct.

God has spoken!

However, like what most people said, if you run NA there's not point in putting bigger injectors. It'll just flood your engine and stuff up your cat convertor.

You reckon you got 261kw at the flywheel?


Yes I do.

Highly unlikely dude.

250 absolute max, but probably a bit less. (I'd estimate 240-245)

You will not be losing 70kw through an auto and stock stall speed converter. Losses through an auto gearbox are not a flat %.

Just got a reply from RCHill.

US$140.20 for ONE injector!!!!

They didn't bother to answer my question about whether or not they fit the Oz 6G75, wonder why?

Makes the local Mitsu dealer price seem a little less OTT.

These have gotta be the world's most expensive injectors.

Don't think I'll be buying any soon at those prices.

Seems a fairly decent price to me. The 1000cc Bosch injectors in my car were $1070. Keep in mind that's for 4.

These days you should be able to get injectors for $100 each or less.

My Bosch 1600s were only $85 each.

You need to be careful buying higher end products like Bosch etc that cheap as there are a lot of places that make cheap Chinese knock offs. These products will seem legit, but are of a very inferior quality. I've seen an engine lunched from a dodgy Bosch fuel pump which was a cheap Chinese knock off.

Nope - genuine.

Nope - genuine.

I'm not saying yours aren't - $85 each for 1600cc items seems insanely cheap to me though, so well done on that price.

More of just a warning to other people. Warlbro is another big name that gets cheap knock offs made and can be fatal to an engine with an imitation fuel pump.

I was thinking could we use two genuine 380 fuel pumps to solve a fuel delivery problem. ( run them in parallel by fitting another to the stock fuel tank with another line)

Yeah - either that or just adapt a different pump into the tank hanger. Easy to do. Drop a single 044 in there and you're good for 400+kw atw.

Yeah - either that or just adapt a different pump into the tank hanger. Easy to do. Drop a single 044 in there and you're good for 400+kw atw.


Is that all?...LOL.....