How to increase throttle response?

[Liam]

So it took about 30 minutes to install (probably an hour and a half without a full shop and many years experience doing this kind of thing).



The AFM this replaced was about 6 months and 1000 miles old. Everything on this engine is pretty much 100% fresh.

Right off the bat, definite improvement. Smoother idle and no bounce when the throttle gets "tapped" in overall drive-ability there is a very noticeable improvement in throttle response and the subjective ass dyno tells me that it's gained some torque and a wider power band.

[downernsp]

Let's make this an easy answer: afm is mechanical vs. maf is digital,and that in it self is a difference,throttle response, one can't argue that as far as the horsepower one will gain? I say put it in do a dyno test.Then you will have paper work in had for proof rather than get 10+ different answers which all can't be correct, and I have heard all good things not one thing bad from the people that have used it.

[Adrian_Visser]

my cammed 2.5l m20 hasa pretty bad off idle stumble too especially when cold, since it was cammed before i got it i've never been sure if it was because of the cam or a problem with the engine

[Liam]

I hope your going to have some before/after dyno graphs for us.

Probably not, I don't have my own dyno and have to drive way to hell and gone to borrow my buddies.

Not a lot of point in spending a bunch of resources on these old ones, maybe latter down the road though if the opportunity is there.

[Moto-Mucci]

I hope your going to have some before/after dyno graphs for us.

[Liam]

subscribed...

Liam...let us know whats up

I hate my AFM and would love to replace it

I have heard that these are the cat's meow but I need to find out for myself bofore I jump into bed with them.

I'll probably will have it all looked over in the next couple of weeks.

[Naplm00]

subscribed...

Liam...let us know whats up

I hate my AFM and would love to replace it

[Liam]

Shoot, should've gotten the W.A.R. chips with it.

W.A.R. chip = the BMW equivalent to Hondata (from what I have gathered from the BF.c Forced Induction forum)

Worked out a deal on this, I've been talking to Miller for a while now (I may become an outlet for these as well if they do what they are supposed to).

[PiercedE30]

Shoot, should've gotten the W.A.R. chips with it.

W.A.R. chip = the BMW equivalent to Hondata (from what I have gathered from the BF.c Forced Induction forum)

[Liam]

So now I have the Miller MAF Gen III kit in my hands to play with.



I'm not so much after increasing throttle responce as wanting to try some things out that are not possible with an AFM but I'll install it first on my 325 and see what we get straight out of the box first.

I can tell you one thing right off the bat, my software guy says he hasn't seen anything quite like what's on Millers chip here.

[der affe]

i thought i'd chime in here. i have a 2.7 stroker with seta pistons, mildly p&p head "i" head, 292 cam, shortie MSDS headers, cat replaced with a 2 1/4" magnaflow muffler 2" mid section and a stromg cat back, split second ford MAF conversion, split second ARC-2a piggy back, Dbilas ITB's, and cone filter with a kamotors heatshield.

the throttle responce is awesome, except off idle from a stop. if you don't blip the throttle to get the idle up a little there is a little hesitation or small stumble first, then it goes just fine. i think that this is caused by the motronic 1.3's out dated engine controls and them trying to deal with the big cam. i have done a lot of playing with it and just can't get that stumble completely gone. standalone may be the only answer to that, but htat was planned as a future mod for the M30B3.5 S/C swap on the car.

[Jand3rson]

AFM or MAF is not a huge difference if you are running a stock motor.

I have a fairly lightweight bottom end, and a 13.5lb flywheel on my 2.8L M20 and I have fantastic throttle response... and that is WITH the AFM.

I'll vouch for this, the throttle response of James' M20 is intense. He's also got a new throttle cable, too. I could feel a definite difference in his pedal response/feel in comparison to mine, it was much smoother.

[Dillinger]

I guess I'm too trusting.

I better spill here. Miller is a well respected tuner and I have seen a lot of their equipment run on the track. I am not all that technically inclined as I drive them but I don't really like getting greasy so I will not argue specs but I can assure you they are at least as on the up and up as any other tuner.

[Moto-Mucci]

I guess I'm too trusting.

[nando]

...but this is just going to go full circle to the "different dyno's, different motors" argument.

exactly, it only begs the question - what else has been done to that motor?