injectors

[diamondblacke28]

does any one know what colour and bosch number e30 325i injectors are.

trying to price new ones but dont want to strip down to see the part numbers.

[e30_Turbo]

does any one know what colour and bosch number e30 325i injectors are.

trying to price new ones but dont want to strip down to see the part numbers.

Blue and last three are 715


HTH, Mark.

[Bob_S]

I priced ones for a 318is from the dealer... Ԛ£67+the dreaded

[Turbo-Brown]

Crikey!

bosch 715 injectors flow a puny 149cc/min which is good for about 29.8bhp/injector making a grand total of 178.8bhp absolute maximum on a 325i with 3bar fuel pressure and that's at a 100% duty cycle which BMW really shouldn't have been getting near!

Now who reckons they're getting more than that with the standard fuel system?

[--alpina--]

Use the E36 pale green injectors, which is 320/325/328, i use them on my 2.7i and works well, am happy , solid fuel all range inall gears...


Regards

Jimi

[Pal318is]

I priced ones for a 318is from the dealer... Ԛ£67+the dreaded

Blimey

What the easiest way to get the dam buggers out of the fuel rail on a iS?

Sorry for the small hijack

Pal

[diamondblacke28]

very useful info thanks guys

[Bob_S]

take the injectors and fuel rail off the car, then remove the electric rail then pull them clean up out of the rail mate. remember to fit new o-rings

[--alpina--]

change the injectors to e36 pale green and see the difference, or that cat above my post thats bobbing its head thru the ceiling is definetly watching you W-----G dude......



jimi

[fistagon]

Crikey!

bosch 715 injectors flow a puny 149cc/min which is good for about 29.8bhp/injector making a grand total of 178.8bhp absolute maximum on a 325i with 3bar fuel pressure and that's at a 100% duty cycle which BMW really shouldn't have been getting near!

Now who reckons they're getting more than that with the standard fuel system?

This is very interesting...I've been wondering this lately. I'm currently experimenting with some higher flow injectors on my 325 after making (I would guess) the same calculation... can anyone explain what's going on here or if there is some flaw in this logic? It seems to be that the general consensus is that stock is good for around 220bhp?

[Pal318is]

take the injectors and fuel rail off the car, then remove the electric rail then pull them clean up out of the rail mate. remember to fit new o-rings

Cheers Buddy

[bottlecapE30]

there is a great thread on e30tech on the stock injectors verse others check it out
http://www.e30tech.com/forum/viewtopic.php?t=30166

[reggid]

Crikey!

bosch 715 injectors flow a puny 149cc/min which is good for about 29.8bhp/injector making a grand total of 178.8bhp absolute maximum on a 325i with 3bar fuel pressure and that's at a 100% duty cycle which BMW really shouldn't have been getting near!

Now who reckons they're getting more than that with the standard fuel system?

thats based on a bsfc of what? Those online calulators are rough indicators it depends how efficient the engine is and how well the fuel is burnt (how much of the available engergy from burning the fuel is utilised). Chips give more power not by flowing more fuel or air but through timing so this argument that the injectors are maxed out is purely speculative.

Everyone thinks Alpina used stock injection (don't know about this) and they get more than 180 hp

[Turbo-Brown]

You're quite right, it was by the rule of thumb of

(injector capacity/5)*No. of cylinders=achievable power....roughly

So whatever that works out at for the brake specific fuel consumption.

[DaveD]

so how come I get 192bhp and oz gets 202 on the standard injectors...

[reggid]

http://www.rceng.com/technical.htm

[Ant]

simply fitting larger flow injectors will achieve nothing at all unless you "tell" the ECU there is more capacity the PWM will remain the same

the M30 mod works well on 02 sensor equipped cars as the closed loop will trim the fuelling to suit over a period of time, on UK cars without the 02 the map values are fixed, and are set for the std injectors only.

Dont forget, the quoted flow is @ 3.0 bar, so an FSE or similar device with a higher rising rate will increase the std flow by the stated amount, as will upping the baserate to 3.5 bar for example.

lots of internet BS about this, TBH I'm tired of preaching truth to those that are blinded by Bullshit and salesmanship.

[fistagon]

Cheers for all the replies on that...that online calculator was actually the one I used!

I've actually gone for 17lb Denso injectors out of a Ford Ranger which I don't know of anyone trying before, but are similar to the stock M30 ones I think. I thought the 19lb Ford ones might be a bit much as I've only modified the engine mildly. This set up is with a stock 3 bar FPR and an O2 sensor that I retrofitted with the BTB 6 branch.

As it happens I was considering trying a FSE valve but was put off that plan thanks to numerous Zoners pitying them heavily.

So far I'm pretty pleased, the engine seems to rev more keenly but I haven't finished setting the whole shebang up yet anyway...the thing I like most right now is the lack of tick-tick-tick noises from the injectors! Once I'm done with the tappets I'm hoping it'll sound and run really nice. I might report back on all this later if I discover anything of note. Or if it all goes horribly wrong...

[Turbo-Brown]

http://www.rceng.com/technical.htm

plugging the numbers into that site seems to support my arguement?

[diamondblacke28]

i have an fse on my 325i and its idleing better/has no hesitation/picks up quicker on acceleration if your car is modded as well i think you will like the result.
after all you can adjust the fuel pressure your self with the fse.
next on my wish list is a zone wild chip.

then pale green injectors should be the same as the e34 520/2.5 shouldnt they.

i have some from a 1992 24v 520i il have to dig then out and give them a try

[diamondblacke28]

the e34 520 24v motor injectors i have are yellow
has anyone had any dealings with these ones

[Ant]

what is the part number dude ? last 3 digits from the mini-plug area

check impedance too, must be high so 14-18 ohms, anything lower is a big no and will fry the ECU very rapidly

[reggid]

http://www.rceng.com/technical.htm

plugging the numbers into that site seems to support my arguement?

they use 0.5 for the bmfc which is an assumption it may be 0.4 or 0.6 nobody can tell you which it is for any particular car, you'll need an accurate engine dyno and diagnostic equipment. Those numbers may apply well to a big American V8 but not neccesarily to a small 6cyl BMW

Anyone have anything to add about the injection system used (injector flow rate and pressure) on the Alpina and Hartge 2.7? That should tell us what the stock M20 units are capable of.

[Turbo-Brown]

Even if we plug 202bhp, 6 injectors, bsfc 0.4, 80% duty cycle and 43.5psi fuel pressure it says we need 178cc/min injectors though.

Seemingly people are extracting more from the standard systems, just interested to know how!

[reggid]

Even if we plug 202bhp, 6 injectors, bsfc 0.4, 80% duty cycle and 43.5psi fuel pressure it says we need 178cc/min injectors though.

Seemingly people are extracting more from the standard systems, just interested to know how!

more than 80%? or maybe they are not makin the power

[Ant]

or maybe they are not makin the power

thats the most obvious, if controversial(sp?) explaination.

unless the cars (Dave D and Oguz) had an FSE fitted with higher baserate than stock

[diamondblacke28]

ant

the last three digets are 714

how can you tell what ohms they are.

[DaveD]

just to add to my confusion the 2.7 (beardymats) gave even more power but he had not changed from the standard injectors...which as i understand the argument ,wont give enough fueld to make this happen

[--alpina--]

Hi, one of the posts mentioned about the FSE boost regulator as its not something recomended, can anyone declare what they mean, like is it bad to fit an FSE , what could happen?, any problems encountered e.t.c.,

Would like to know..


Cheers


Jimi

[reggid]

Those online hp calulators based on injector size are clearly inaccurate unless you know the relevant numbers to plug in which applies to any equation or formula.

I also wouldn't trust equations from a company that sells injectors all they will tell you is you need bigger ones....lol

[diamondblacke28]

some people say the fse valves are dangrous and cause fuel leaks and cause fires.

if an fse leaks thats down to poor fittment.

there are people on here that are happy with there fse as am i.

the fse has made a big difference to my standard 325i.

some say they must over fuel the car.

my car is running great with the fse and it doesnt smell rich.

it has also passed an mot with it on.

[--alpina--]

Sounds nice also i would like to know as the 325 is 30psi, pushing it to 3.5. is it adquate? whats the highest can you push without probs?




jimi

[Turbo-Brown]

Sounds nice also i would like to know as the 325 is 30psi, pushing it to 3.5. is it adquate? whats the highest can you push without probs?

Not sure what you mean mate, the 325's what is 30psi and what are we pushing to 3.5?

[maxfield]

3.5 bar?

[Turbo-Brown]

Fair enough, but what's the 30psi? The 325i FPR is set to 3bar which is more than 30psi

Really am very interested to know how these FSE things work.

If they don't add fuel on low load, and they don't add fuel at any other load, what do they do?

I've had a search on google, but as is the usual way of things, when you click on something that says "this is how it works" it actually tells you nothing about how it works and instead tells you what it does, which is something completely different!