MX-5 OC Forum

Hi does anybody have, or know where i may be able to find a Blink Motorsport AFM ,apart from BLINKS own very expensive website.

Or any other suggestions for an adjusable AFM,thanks.

Isn't this just a standard AFM "optimised" then sealed back up. I suggest sending out mass emails to all the Ma5da teams asking them what they are doing with their AFMs.

AFM modifications were very much the in thing years ago, when people were taking RX7 AFMs and fitting them with MX5 clocksprings; not so much here, because there aren't many RX7s in scrapyards.

There are Spec Miata places in the US that can "tune" your AFM, eg.

http://www.appliedracingtechnology.com/services.php

Cheapest way would be to do it yourself; lots of threads on miataforum.com. It sounds like a labour intensive job, and probably best done using your own AFM on your engine. So £210 might not be too bad. But I can't see this being any more than marginal improvements.

Randy Stocker (SoloMiata) had plenty to say about AFM mods.

Thanks AT

Thats prity much what i had found,just had a power run at SANSPEEDS in bexleyheath and was told all ok and not a lot left i could tweak apart from leaning the airflow mix

Not a job i fancy myself.

And now that the mx5 racing teams have banned the blink AFMs there may be a bunch of them for sale  hopefully.

will check out the Randy Stocker forums

See http://www.solomiata.com/airflowmtr.html

Adjusting your own AFM is actually a pretty simple job, I found. Particularly so if you have/can borrow a  gas analyser.

I did a thread on the process a while back.

 The way that BLiNK adjust the AFM's is completely different to what is described in other threads.

The Randy 'Solomiata' article on the 1.6 AFM is also incorrect and has caused lots of people to believe the stock AFM is the 'bottleneck' in the inlet tract - it isn't and is capable of flowing enough air for 7,200rpm on a decently modified cylinder head.

The way he measured the airflow capabilities of the stock AFM was incorrect and he was using the wrong pressure differential on the flow bench.

The BLiNK AFM was designed for racing where every last ounce of performance is required in a single make series - it does give much better throttle response and keeps the AFR's correct at high revs whilst not restricting the airflow by tightening the clock spring mechanism.

HTH.

 Search on here for how to adjust the afm, there is a long article

A file, an hours work and a bit of patience will also improve the airflow through a std afm

nikpro:

 The way that BLiNK adjust the AFM's is completely different to what is described in other threads.

The Randy 'Solomiata' article on the 1.6 AFM is also incorrect and has caused lots of people to believe the stock AFM is the 'bottleneck' in the inlet tract - it isn't and is capable of flowing enough air for 7,200rpm on a decently modified cylinder head.

The way he measured the airflow capabilities of the stock AFM was incorrect and he was using the wrong pressure differential on the flow bench.

You've said this before on other forums (often in relation to Blink Motorsport threads), usually without giving any evidence. Expand, please?

AT:

You've said this before on other forums (often in relation to Blink Motorsport threads), usually without giving any evidence. Expand, please?

Apologies,

I am a director at BLiNK Motorsport and have been involved in the Development of the Ma5da Optimized Race Engines.

The AFM we sell is the result of numerous hours of flow bench & rolling road work and the adjustments made to it are quite different from those described in other threads.

There is one caveat though - I would not advise just 'bolting' one onto your engine unless you know the fuel injectors and other inlet systems are running to Mazda Spec.

The AFM's run the air fuel ratio much leaner at 4,500rpm and above - if your fuel injectors etc. are not up to spec then your engine will be damaged; we always encourage people to check the callibration with a wideband Lambda.

Do they work? The Race series has banned them by a 'dubious regulation' IMO because they were seen to give an unfair advantage ??

HTH

Fraser

No, I'm more interested in your issues with Randy Stocker's statements, and, presumably, Matt King (author of "Freeflowing a Miata MX5", an article no doubt you are familiar with).

AT:

No, I'm more interested in your issues with Randy Stocker's statements

I don't really want to get into any further discussion but Randy just makes a statement on what CFM rating the Air Flow Meter is - our tests and results show otherwise.

The answer I gave was to the original Poster who stated the BLiNK AFM was very expensive - if every last HP doesn't matter then, yes it is expensive. In a single make series where people buy numerous AFM's to find the best and hours testing them on a dyno then it offers good value for money.

I really can't say fairer than that.

nikpro:

AT:

No, I'm more interested in your issues with Randy Stocker's statements

 

 

I don't really want to get into any further discussion but Randy just makes a statement on what CFM rating the Air Flow Meter is - our tests and results show otherwise.

 

So much for a discussion forum. We are to just take your word that one of the most knowledgeable Miata racers out there is wrong. Not much of an answer really, except a plug for your product.

AT:

We are to just take your word that one of the most knowledgeable Miata racers out there is wrong. Not much of an answer really, except a plug for your product.

 

No, of course you don't have to just take my word for it - you can ask the numerous Ma5da racers what they thought of them, however I'm not going to disclose on a public forum how we do the modification which took lots of research & time. We have been through all these arguements before on the Racing Forums and have no desire to start again here - I hope you understand.

http://www.ma5daracing.com/forum/viewtopic.php?f=44&t=637

nikpro:

The answer I gave was to the original Poster who stated the BLiNK AFM was very expensive - if every last HP doesn't matter then, yes it is expensive. In a single make series where people buy numerous AFM's to find the best and hours testing them on a dyno then it offers good value for money.

I really can't say fairer than that.

I don't think the above is a 'plug' for our product  

(I also don't understand why your responses are so aggressive - I was just trying to help the OP)

nikpro:

AT:

We are to just take your word that one of the most knowledgeable Miata racers out there is wrong. Not much of an answer really, except a plug for your product.

 

 

No, of course you don't have to just take my word for it - you can ask the numerous Ma5da racers what they thought of them, however I'm not going to disclose on a public forum how we do the modification which took lots of research & time. We have been through all these arguements before on the Racing Forums and have no desire to start again here - I hope you understand.

http://www.ma5daracing.com/forum/viewtopic.php?f=44&t=637

nikpro:

 

The answer I gave was to the original Poster who stated the BLiNK AFM was very expensive - if every last HP doesn't matter then, yes it is expensive. In a single make series where people buy numerous AFM's to find the best and hours testing them on a dyno then it offers good value for money.

I really can't say fairer than that.

I don't think the above is a 'plug' for our product  

(I also don't understand why your responses are so aggressive - I was just trying to help the OP)

[1] I don't have access to that thread you have linked, and I have no inclination to register for another forum.

[2] I don't hang out with Ma5da racers, so perhaps you can shortcut for me? I not sure who you mean by "them"; we are talking about a single individual. You seem to misunderstand.

[3] I don't want to know or need to know the details your product. I never asked for that.

[4] I was merely wondering why you have questioned Randy Stocker's statements regarding the numbers he has calculated for the 1.6 AFM at 10" and 28" of water, given that you have publicly dismissed the validity of the SoloMiata website. I assumed it would only take you a sentence or two to explain why you think his logic is flawed. If there are flaws, I would consider it a service to the MX5 community if you might let Gary Fischmann at Miata.net know there is a flaw on his website. I don't see how there is a commercial interest in that.

[5] I don't understand why you are being coy about this.

AT:

[4] I was merely wondering why you have questioned Randy Stocker's statements regarding the numbers he has calculated for the 1.6 AFM at 10" and 28" of water,

10" & 28" of water are standard test pressures for measuring cylinder heads on flow benches. They are chosen so cylinder head flow can be compared but have little relevance in what pressure differentials are seen whilst an engine is operating. (The UK standard test pressure is 10" & Smokey Yunick from the USA started using 28" many years ago - most modern benches are now testing at 40" of H2O and pressure differentials in an operating engine are close to 100" of H2O)

Inlet pressure differentials are again different - do a search to find out what pressure differentials Carbs and throttle bodies are tested at - you will find this is completely different to cylinder heads but, yet again it does not simulate the real world operating enviroment of an inlet tract - it is only a standardised test pressure so flow rates can be compared.

Randy has measured what he calls a 'bone stock' AFM - I can tell you from our test that we have seen 10bhp between a 'good' used 'Stock' AFM and a poor one - so the dyno proof page that Randy shows does not use a big enough 'sample' for it to be accurate. (I would have suggested a SpecMiata tuned AFM Vs an RX7 AFM would have been a better comparison and given very different results, considering the RX7 meter must have already been adjusted to its optimum for it to work on an MX5, however it would not have supported his arguement).

Norman Garrett (Author of Mazda Miata performance handbook) also did a fair amount of research into the 1.6 AFM and concluded it was 'oversized' for the application.

In respect to your question about being 'coy':

We do love the MX5 community but we also have a business to run - if we want the business to exist then we need to see some financial return for the equipment/efforts/knowledge gained.