How to raise Fuel Cut with the stock AFM.

[aye mate]

This slight modification of the Stock AFM will raise fuel cut for most cars. I have done this and run 12.5 psi daily with the stock turbo.

1: Remove AFM from car.
2: Locate aluminum plug covering air screw.(pic1&2)
3: I used a 1/4 inch drill bit to drill out the plug. I also had to jiggle the bit around to remove all of the plug after I had drilled through.(pic3)
4: Using a flat-head screwdriver turn the screw until it is no longer visable from the inside of the AFM. (pic4)

As I said before this will work differently on different cars,(pertaining to the Kaarman Vortex of metering air by frequency*?* not by boost pressure) but I have hit 15 psi with no signs of fuel cut. I have "heard" of people running close to 18psi without FC. Please make sure your fuel system is up to handling the extra boost before you go cranking too high. Happy Boosting!

 

[siman]

I have the aeromotive FPR and bumped up the pressure to about 46lbs at WOT. no joke.

I am honestly kind of scared of the FC.....its weird...I cant full throttle the thing hahahahahha I feel like the car will stall and never come back on hahahahahh

I guess I need to get over that. I am just SOOO cautious of driving my car "too hard" since I rebuilt it.....I am soo careful with it, but drift it around every corner I can? LOL......

I will drill the AFM and back out the screw today....

anywho, Ken you coming to the meet this saturday?

 

[thevork]

Yes it seems to be a simple mod.
I'd do it if I had a A/F meter.

Can anyone tell me if the mixture will be running (too) lean after this mod?
I think it can be as dangerous as a BCD

 

[siman]

No. The stock FPR does not have any adjustment ability..and its way too restrictive and old anyhow to undergo new load pressures of fuel.


Just by the aeromotive ( or any other GOOD aftermarket FPR) and hook it up....its worth the time and money for future benefit.

 

[miggles]

the "avo fuel cut" is made by the company "AVO" Advanced Vehicle Operations.They are located in Australia.Terry Wilson is the owner of the company.He had made and modifed many turbo kits to suit non turbo cars.He makes boost/fuelcut piggybacks.
http://autospeed.drive.com.au/A_1579/cms/article.html
here is a article on him and his workshop

 

[siman]

so.....what is the AVO mod?

What is it?
What does it do? ( get rid of the fuel cut obviously making a guestament on this thread LOL)

-J.Mann

 

[aye mate]

The stock afm with this mod is good for the stock turbo. I'm not going to push anymore than 13psi with this mod. The Lexus afm will allow for alot more un-metered airflow and thus a higher FC. Another option to the Lex AFM, that has had amazing reviews, is the MAF-T. When I upgrade my turbo I will be using a MAF-T set up.

 

[boost fiend]

i have a 89 supra 7m-gte with the metal hg , egr blockoff plate, cold air kit and hks evc4 valve controler. stock afm and i run about 9 pounds on the street. as soon as i turn on the evc i hit about 14 pounds of boost and no fuel cut off. almost ready to put on another turbo and the lexus afm and 550cc injectors. never had a problem with fuel cut.

 

[shuyin559]

i have a 89 supra 7m-gte with the metal hg , egr blockoff plate, cold air kit and hks evc4 valve controler. stock afm and i run about 9 pounds on the street. as soon as i turn on the evc i hit about 14 pounds of boost and no fuel cut off. almost ready to put on another turbo and the lexus afm and 550cc injectors. never had a problem with fuel cut.

so what is the egr block off plate anyways?. but how can that cause not to cut fuel?. please let me know more info on how to stop fuel cut. thanks

 

[aye mate]

so what is the egr block off plate anyways?. but how can that cause not to cut fuel?. please let me know more info on how to stop fuel cut. thanks

EGR=Exhaust Gas Recirculation, Its for emissions purposes, I'm not sure exactly how it works. With the EGR system removed and block off plates in place, it de-clutters the engine bay a bit and allows the engine to run a little cleaner because exhaust is not being circulated into the intake. It has nothing to do with FCO. I have hit 16psi on my stock turbo with the stock AFM. So 14psi isn't that uncommon.

 

[siman]

Oh yeah guys....it works!

I was running ( like a month ago before the turbo blew) 14-15lbs of boost on the stocker AFM. No fuel cut whatsoever.

I already have bought a lexus afm and what not...but thats waiting to be put on later for another reason :naughty:

-Jonathan

 

[siman]

You do realize that the aeromotive is a rising rate regulator (increasing fuel pressure 1lb for every 1lb of boost)?

is it really? I tuned it on idle with the vacuum hose off and set the gauge ( fuel pressure gauge on the regulator) to 28-30psi...right at stock...

I had no clue it was a rising rate regulator...LMAO

thanks Jeff!

-Jonathan