m30 AFM "Learning" Time

[Jand3rson]

What size are the M50 injectors?

I'd like to run them with the M30 AFM on my 2.7 stroker when it gets built, and I'd just like to know the numbers for my own curiousity.

[pig4bill]

What are you doing for the air filter setup with the M30 AFM, just a cone filter?

Stock airbox. I modded it, looks factory.
It can be accomplished with a dremel, a sander, and a drill.
If you didnt know e30's, you cant tell, and thats how I like it :)

Stock airbox, you mean the stock airbox off the m30?

Hopefully the Cali smog sniffers can't tell the difference either.

[nando]

it really shouldn't take very long for the ECU to adjust to the M30 AFM, unless something is wacky. All you really need to do is a Ferrari tuneup, and you'll be fine after a couple miles. Whenever I reset my ECU I just drive the piss out of it for a couple miles and it runs great. :)

not sure how worth it any AFM conversion is going to be though.. I mean, you're going from one door that blocks airflow to a slightly larger door that blocks airflow. I sold my AFM and am just going to run stock until I do an SMT6/MAF conversion.

[Skafrog]

Pig4bill, I mean the stock m20 airbox. I modified it to fit.
They wont be able to.
Euro, they are #18/17 size, depending on who you talk to. Plenty for an m20.

Nando, it just doesnt work, nothing about the ECU resetting, you need to swap the electronics If you look at both the electronics, they are different, and are sending different values to the ECU (mainly the arm that sweeps, and the length of the black arm).
You can pack all the air you want via an SMT-6, but you still have the small throttle body, the SOHC head, and the shitty intake runners.
IMO, the m30 AFM is just the right mod. Cheap, effective, and I think it's large enough to move the bottleneck elsewhere.

[Court M3]

Ska, any pics of your setup? Interested to see how it fits

[nando]

Nando, it just doesnt work, nothing about the ECU resetting, you need to swap the electronics If you look at both the electronics, they are different, and are sending different values to the ECU (mainly the arm that sweeps, and the length of the black arm).
You can pack all the air you want via an SMT-6, but you still have the small throttle body, the SOHC head, and the shitty intake runners.
IMO, the m30 AFM is just the right mod. Cheap, effective, and I think it's large enough to move the bottleneck elsewhere.

I understand that, what I mean is it doesn't take very long for the ECU to remap/readjust.

also, people who have done a maf conversion (along with other mods of course) have seen large torque and HP gains (ChrisE30 comes to mind). I think Dave was the only one to dyno an M30 AFM and he gained something like 5hp with the AFM, injectors and an AFPR. Considering the cost of most quality AFPRs, the AFM and a set of 19# injectors, I don't think the cost of an SMT6/MAF is going to negate the benefits (including throttle response).

I suppose for you guys that can just drop in a 24v engine it might not be worth it, but for me it makes more sense to build the M20, and an M30 AFM just won't cut it.

[Skafrog]

touche nando, touche.
I forgot about the whole iX deal.
Well, just make the most powerful m20 ever. :D
Court, I will have pics very shortly.

[rwh11385]

Court, this is what I did on Ely's advice, and I think Rob did similar.


Enlarge the hole, had to use branch cutters.......but dremel would rock.


I had drilled holes for the AFM to mount to, but that didn't seal......so I improvised..... :roll: oh well, somehow Ely got it to work......


Installed

[ZiMMie]

wat type of paint did u use on ur thottle body?

[Skafrog]

I sort of did it that way (same as Robert).
However, I used the m30 gasket, and used it as a template to enlarge the opening. I then filled the stock airbox holes, and sanded down the raised portion to be level, so the mounting portion part of the airbox sits flush on the airflow meter. I drilled holes, took the studs from the m20 airbox, and put them in the m30 AFM, and then bolted it up. I used some black silicone gasket sealant to make an airtight seal between the airbox and the AFM.
Basically, by making the airbox flush where it mounts to the AFM, it eliminates the need for all the unsightly glue and such.
On day two, still getting a little stronger, well worth it. I wont tell you that its amazing, but its noticable for sure. All you guys should do it. A leatherman phillips screwdriver fits the AFM electical board screws perfectly, mine were not hard to remove.

[ZiMMie]

and my question :(

[Court M3]

thanks Robert that helped a lot. trying to get more mounting ideas How did you get it mated to the manifold?

[rwh11385]

and my question :(

nando did it

[DrMcDave]

nando its funny you said that, i finally decided what to do with my engine and a swap is out of the question. powerful or semi powerful m20 it is. My next car can be ridiculously fast cause the ix isn't ever going to be. still love it though.

didn't dave gain 6whp with all that stuff, i am pretty sure it was wheel and not crank. either way its expensive to buy afpr and injectors and such.

[nando]

nando its funny you said that, i finally decided what to do with my engine and a swap is out of the question. powerful or semi powerful m20 it is. My next car can be ridiculously fast cause the ix isn't ever going to be. still love it though.

didn't dave gain 6whp with all that stuff, i am pretty sure it was wheel and not crank. either way its expensive to buy afpr and injectors and such.

I dunno, I was pretty unimpressed with Dave's stroker overall. it seems like he just spent money on stuff without knowing what it would do for the car - things like the extrude honed intake and BB throttlebody which didn't do much for him at all, and using the stock chip (because JC caused it to ping) and any sort of AFM killed any potential that motor had, IMO. it's possible he didn't gain anything with the AFM and injectors either, it could have just been the FPR. who knows.

anyway, why not do a stock rebuild of your M20 and turbo it, it'd be pretty damn fast then. ;)

I want to go NA, but I have a lot of other priorities to take care of first. not like I really need a super fast daily driver anyway..