*95 owners with upgraded injectors* - post your injector size and mods

[TAMUmpower]

I cant seem to find the exact answer i am looking for in the searches.....so here goes again. My 95 has the JC intake, HFM, Turner software, borla track pipe and AA exhaust. I also have the stock injectors and im thinkin I am running lean. I am curious as to what mods yall had when you went to bigger injectors, and if you went with the #21.5 or the #24 injectors.
Thanks.

[NakNak]

I cant seem to find the exact answer i am looking for in the searches.....so here goes again. My 95 has the JC intake, HFM, Turner software, borla track pipe and AA exhaust. I also have the stock injectors and im thinkin I am running lean. I am curious as to what mods yall had when you went to bigger injectors, and if you went with the #21.5 or the #24 injectors.
Thanks.

Most 95 guys just go with 24lb injectors. 21.5 should be fine but why bother taking the chance if you are already replacing them. I am running the 24lb. injectors with:

Dinan CAI
Conforti chip tuning
West Coast Riots BBTB (no whp gain)
Coolant bypass
Fan Delete Kit
B&B Triflow exhaust (Yet to be dynoed)
OBD-2 Cat midsection (Yet to be installed and dynoed).

[grn325is]

Sorry to bring back an old thread. But banging my head trying to find what I need. So here is my current setup:

95 M3; stock injectors, 3.5"HFM, Conforti chip, intake, exhaust.

What I WANT to do is install 24# injectors. Where can I find a Conforti chip that offers for 11/94 M3 software which works with 24#, 3.5" HFM, intake, exhaust?? When I call Turner they say the only chip has all that plus a lightweight flywheel programmed in. Well where is everyone finding this chip? On the Turner website check out this link:

turnermotorsport.com/pages/chip_application_2008.pdf

Where is the chip for JUST - 24#, 3.5 HFM??

What do I do??

[Vonbimmer]

My M was built in 11/94 and I am running 21.5 96+ M3 injectors, 540i MAF and a cold air intake with the bimmerworld elbow. The car runs great, no pinging etc. The chip I picked up from Turner is the 5060-3009 which is programmed for 21.5 injectors and the euro hfm. I believe the chip is good for models up until 12/94.

ps. I have read that 21.5 injectors are perfect in you don't have any cam plans + they are less apt to encourage a rich mixture.

[grn325is]

My M was built in 11/94 and I am running 21.5 96+ M3 injectors, 540i MAF and a cold air intake with the bimmerworld elbow. The car runs great, no pinging etc. The chip I picked up from Turner is the 5060-3009 which is programmed for 21.5 injectors and the euro hfm. I believe the chip is good for models up until 12/94.

ps. I have read that 21.5 injectors are perfect in you don't have any cam plans + they are less apt to encourage a rich mixture.

Yea that is on the options I have been thinking of, but I'm still curious if there is a chip for the 24# out there?

[BJO]

I have the Eurosport HFM kit and upgraded my injectors to the blue Ford motorsport ones (Bosch). I got an upgraded chip from Turner. Been running this for 30k+ miles, 6+ years, with no issues.

[grn325is]

I have the Eurosport HFM kit and upgraded my injectors to the blue Ford motorsport ones (Bosch). I got an upgraded chip from Turner. Been running this for 30k+ miles, 6+ years, with no issues.

Which conforti chip are you using? and are you using the 24# injectors?

These are the available conforti chips;

turnermotorsport.com/pages/chip_application_2008.pdf

[Scotth]

The lightweight flywheel chip is no big deal, it just bumps your idle a bit (I have the Turner chip with it, but no installed LTW flywheel).

[grn325is]

Hey Scotth, I'm in Bothell, WA too! Small world. Well what is your idle when car is warmed up? Curious how much it would bump it up, Turner said I can use it with the increased idle as a side affect. Just not sure I wanna... I'm so picky with my car! Lol

[Scotth]

I will fire it up tomorrow and check it. I think it is only a 100 rpm bump.

edit: Have you looked at TRM software? People seem to have been having good luck with it. Just another option.

[RRSperry]

Just curious, but why do you think you are running lean. And if you are why do you think you need the 24#/hr injectors as opposed the the 21.5's?

The issue with the 95 injectors was a duty cycle issue. It you ran at the track, or autobahn at really high rpm's, you could be exceeding the 80% duty cycle design limit. That COULD lead to an injector overheating and failing, resulting in a high rpm lean condition.

But we are talking about really extreme duty. Nothing you could ever do on the street.

If you think you are lean, get thee to a dyno or install a wideband AFR gauge and see.

If your injectors are functioning correctly and you have a good tune, you will see 0, zip, zilch, nada, increase installing larger injectors. In other words, if the engine is running correctly, adding the ability to use more fuel won't make it run MORE correctly...

The only time you need to add bigger injectors is when you add more air. Installing cams, or forced induction. Says the guy with 38#/hr injectors...lol

[shaeff]

Right on.

That being said, I've got a 540i 3.5" HFM, custom 3.5" nitake, 21.5# injectors, and TRM software. I went with the 21.5's because I was still driving the car, and wanted zero down time. I sent the 21.5's to be cleaned (good thing, they weren't in very good shape!) and swapped everything in all at once.

One thing I noticed with the 21.5's, is that revving the motor throughout the entire RPM range is smoother and more responsive. However, I can't say whether that's because my old injectors weren't operating properly (spray pattern), or because of the added air/fuel/tune.

[grn325is]

I see. I spent quite of bit of time on the "dyno" thread for the E36 M3's. Especially the 95's. It looked like most if not all the A/F ratio numbers were around 14 range. Looking at my dyno run graph it almost looks the same. So I am now just considering the 21.5lbs injectors with chip.

But I wonder if the difference in +4lbs (17lbs to 21.5lbs) bigger injector really an improvement worth approx $550? ($300 for rebuilt 21.5's, $250 for chip). Or potentially 24lbs for $300 and chip for $250! I'm second guessing myself every 5 minutes lately!

[BJO]

Which conforti chip are you using? and are you using the 24# injectors?

These are the available conforti chips;

turnermotorsport.com/pages/chip_application_2008.pdf

yes I am using the 24# injectors. THe chip I got also bumped my idle for my LTW flywheel. Chip # is 4131-3005-SS

[Scotth]

Checked my idle this morning, it is about 850 rpm.

[mikese36m]

I am running 24# injectors as well with a Euro HFM and Dinan Throttle Body. My chip is Jim Conforti.

[Balthazarr]

24 lb; stock box (removed CAI over a year ago for smog check) TMS/Conforti for 24lb and 3.5 HFM with crank pulley ( sold the C.P.a couple of years ago bc I became convinced of potential damage due to torsional harmonics of the long crank).

Runs great.

[shaeff]

sold the C.P.a couple of years ago bc I became convinced of potential damage due to torsional harmonics of the long crank).


Wise idea. :) We should get ATI to make a dampened LTW crank pulley for our cars. They'll do it with enough interest. (then you could have your cake and eat it, too! LTW crank pulley AND LTW flywheel, with no potential damage due to harmonics!)

[mariogto1968]

Hello, I just got off the phone with Turner Motorsports in regards to the 24 lb injectors and the PROPER chip to go with them. I think some of the complaints about running rich with the 24 lb injectors may come from using the incorrect chip. Let me explain, I have the 3.5 inch air mass sensor, Conforty cold air intake, bored throttle body, Super Sprint long tube headers, OBD2 Cats, and Remus exhaust. The chip i have is tuned for Intake and Exhaust upgrades BUT NOT cams. My 1995 M3 was built july 1994. I think some people may be using the chip shown on Turner's web site which is tuned for cams. They do not show a chip for the 24lb injectors with out cams but it is available IF YOU ASK FOR IT. This is the chip i purchased 3 years ago. My car runs strong and very clean ( emissions testing ). There is no smoke under any amount throttle. If the chip is tuned properly you realy shouldn't run rich, Tony