MAF question -

[jhennessy]

I have a 90mm Lightning MAF and was told that it is pegging out at 5 volts when I had my Mustang tuned last. As a consequence I am looking to upgrade my MAF in addition to the purchase of a power pipe and smaller pulley - my question is this: can I use the diablosport MAF.ia interface adapter on my current MAF in order to eliminate the purchase of a whole new MAF?

I was also recently told that if I am maxing out my MAF then I am more than likely approaching the limit on my Lucas 42lb injectors and that I should upgrade to 60s...does this sound accurate? Will the MAF.ia interface adapter allow me to account for the upgraded injectors if this is the case? A list of my mods is in my signature - thanks!

James

[speedfreak87]

not sure about the MAF, you might want to contact diablo to see if they are compatible.

and you can never have to much injector.

[jhennessy]

not sure about the MAF, you might want to contact diablo to see if they are compatible.

and you can never have to much injector.

I agree about the injector idea but, while you can never have too much injector - it is possible to have too little money!! And that, of course, is the situation I find myself! I figure I can spend about 850 for a powerpipe, diablosport predator (or SCT), diablosport MAF.ia interface adapter, and smaller blower pulley.

No idea as to what to expect in terms of power gains considering the tune will be done without a dyno and, therefore, conservative - but any improvement is welcome!

[white35th]

I agree about the injector idea but, while you can never have too much injector - it is possible to have too little money!! And that, of course, is the situation I find myself! I figure I can spend about 850 for a powerpipe, diablosport predator (or SCT), diablosport MAF.ia interface adapter, and smaller blower pulley.

No idea as to what to expect in terms of power gains considering the tune will be done without a dyno and, therefore, conservative - but any improvement is welcome!

I had the same problem on mine I put a diablo mafia adapter on it and it solved the problem. lets you adjust the output quite a bit. You know that you need bigger injectors when your fuel pump duty cycle is going over 90% at full hp. I also found that you could reduce output from the maf by putting a resistor dividing network or a varible resistor in line with the maf output but went with the diablo on Justins sugestion. The maf keeps working up to 12 volts but the computer can only see up to 5 so scaling the maf works just as well as a bigger maf. I have been told the factory maf units are much more stable than the aftermarket units. you will have to retune to match to output.

[jhennessy]

I had the same problem on mine I put a diablo mafia adapter on it and it solved the problem. lets you adjust the output quite a bit. You know that you need bigger injectors when your fuel pump duty cycle is going over 90% at full hp. I also found that you could reduce output from the maf by putting a resistor dividing network or a varible resistor in line with the maf output but went with the diablo on Justins sugestion. The maf keeps working up to 12 volts but the computer can only see up to 5 so scaling the maf works just as well as a bigger maf. I have been told the factory maf units are much more stable than the aftermarket units. you will have to retune to match to output.

do you have an aftermarket MAF working with your mafia? Do you think I can use a predator/sct tuner to account for the mafia/MAF combo if tuned by either a predator or sct dealer? - thanks for all your input!

[white35th]

do you have an aftermarket MAF working with your mafia? Do you think I can use a predator/sct tuner to account for the mafia/MAF combo if tuned by either a predator or sct dealer? - thanks for all your input!

I have a 90mm lightnig maf and the diablo mafia with 42lb injectors and tuned with a sct. dyno was 440 rwhp and I have just a little injector left what kind of fuel pump are you running. I have a lot of maf left prob could go to 600-700 hp with the lightnig maf with the mafia. I would have to have more injector and fuel pump though If I get to over 500 hp.

[jhennessy]

I have a 90mm lightnig maf and the diablo mafia with 42lb injectors and tuned with a sct. dyno was 440 rwhp and I have just a little injector left what kind of fuel pump are you running. I have a lot of maf left prob could go to 600-700 hp with the lightnig maf with the mafia. I would have to have more injector and fuel pump though If I get to over 500 hp.

I'm running the walbro 255 with the lucas 42lb injectors. How much do you think is possible with the proposed upgrades??

[white35th]

I'm running the walbro 255 with the lucas 42lb injectors. How much do you think is possible with the proposed upgrades??
I would stop around 400 with that fuel pump alone if you went with a BAP (I have one) it will pump about 40% more prob good to close to 500. The problem at that level is you will suck your fuel bucket dry on a long run (it will make a quarter but not a mile and then if you are running a power adder it blows up. (done it twice). At that point you need a cobra tank or fuel cell. I just bought a new goody that activates automaticly to reduce timming at the onset of detonation It is like the factory knock limiter but much more sensitive and can retard each cylinder seperatly and retard automaticly by boost level. This should solve the blow up problem (I hope lol)
Here is a injector fuel pump calulator it works pretty well. http://www.modulardepot.com/fuelcalc.php

[Marc@UPR]

I had the same problem....the Diablosport MAFia solved everything!!!

[white35th]

I had the same problem....the Diablosport MAFia solved everything!!!

Of course if money is an object the mafia is not cheap.

[jhennessy]

Of course if money is an object the mafia is not cheap.

I figure it is cheaper than purchasing a new MAF - do you think the walbro is good enough in traffic as opposed to running the 1/4? I do not think I will be hitting the track anytime soon while here in England!

[white35th]

I figure it is cheaper than purchasing a new MAF - do you think the walbro is good enough in traffic as opposed to running the 1/4? I do not think I will be hitting the track anytime soon while here in England!

If you dont keep your foot to the floor more than 1\4 mi you should be ok keep a eye on the fuel\air guage and make SURE it does not go lean under boost or POOF. It will take 1 or 2 seconds to blow after it goes lean.

[jhennessy]

but if I am to incorporate a KB BAP I should be ok for a little while...?

[jhennessy]

I had the same problem....the Diablosport MAFia solved everything!!!

did you run the MAF.ia with an aftermarket MAF? how much more did you gain after no longer being limited by your MAF?

[white35th]

but if I am to incorporate a KB BAP I should be ok for a little while...?

The bapp will give your pump about 40% more flow capibility but will do nothing for the fuel bucket prob, it is limited by design. I do not know the exact flow that you can maintain with the stock bucket with out draning it. If someone does I would love to know myself. I think we are both close to the edge on that problem with the power you are listing.

[jhennessy]

The bapp will give your pump about 40% more flow capibility but will do nothing for the fuel bucket prob, it is limited by design. I do not know the exact flow that you can maintain with the stock bucket with out draning it. If someone does I would love to know myself. I think we are both close to the edge on that problem with the power you are listing.

yeah, you're going to have to explain the fuel bucket idea...Are you referring to the capacity of the tank or lowest area of the tank near the pump?? - thanks!

[white35th]

yeah, you're going to have to explain the fuel bucket idea...Are you referring to the capacity of the tank or lowest area of the tank near the pump?? - thanks!

The pump sits inside a fuel bucket(a litle tank) that is in the main tank fuel is drawn into the bucket from the main tank by a asperator that uses the fuel pump to fill the bucket. It is so if your tank is low all the fuel does not run to one side of the tank and uncover the pump inlet(bad) there is a limit as to how fast the bucket can fill ergo if you are sucking fuel faster than it comes into the bucket it can suck it dry(also bad) moter goes lean and boom. There are mods that can be done like drilling a hole in the bucket so it at can fill faster but you can not let your tank get less than 1\4 or you have problems. cobra tanks do not have buckets but use tank bafels instead to solve the problem so they are not prone to this. I am given to understand that 350-400 rwh is around the limit for the bucket with a sustained high output but there are some varables involved.

[jhennessy]

ah, I see...and the solution, then, is to replace the tank for the most part?

[white35th]

ah, I see...and the solution, then, is to replace the tank for the most part?

It seems the only ideal soulution

[jhennessy]

I have another question for ya'...how high in boost can I go before an intercooler or aftercooler becomes necessary??

[Marc@UPR]

Of course if money is an object the mafia is not cheap.


It's cheaper than a new MAF

[white35th]

I have another question for ya'...how high in boost can I go before an intercooler or aftercooler becomes necessary??

My opinion is about 6 to 7 lb. water meth injection will work allso look at the snow site.

[white35th]

It's cheaper than a new MAF

i think a mafia with a lightning maf is the way to go. :mick:

[jhennessy]

I already got the lightning MAF and the MAF.ia is only $149 so I will be good there... I am already running a 10lb pulley (3.33) and I am looking to go with a 2.80/2.90 something pulley - no idea how much boost I will pick up when I combine that with a powerpipe - and in the past I have thought about the meth injection but do not know to what extent I would have to replenish the resevoir and how hard it would be to have a tune included in the purchase of a predator/sct tuner without having my car on the dyno when the tune is written...

[white35th]

I already got the lightning MAF and the MAF.ia is only $149 so I will be good there... I am already running a 10lb pulley (3.33) and I am looking to go with a 2.80/2.90 something pulley - no idea how much boost I will pick up when I combine that with a powerpipe - and in the past I have thought about the meth injection but do not know to what extent I would have to replenish the resevoir and how hard it would be to have a tune included in the purchase of a predator/sct tuner without having my car on the dyno when the tune is written...

You already need a cooler of some type or you will quickly wear out your motor at the 10lb level. the temp going into the manifold can get up to 160-170f real quick and will cause at the least mild detonation and you know the worst. The mild type will kill your rod bearings with out you knowing it till it is too late and MMR will not warenty the motor if it shows signs of detonation.
The 2quart coolent tank will last from 200-400 mi depinding on how often you get into boost. You can use your windshield washer tank and double that. the fluid can still be used to wash your window also

[jhennessy]

so you think I should go with the snow boost cooler in addition to the powerpipe, maf.ia, smaller pulley and tuner - to what extent do you think a tune can be written to account for the boost cooler without having the car on a dyno?

[white35th]

so you think I should go with the snow boost cooler in addition to the powerpipe, maf.ia, smaller pulley and tuner - to what extent do you think a tune can be written to account for the boost cooler without having the car on a dyno?

I had the boost cooler and it worked fine but I took it off and am putting on an aftercooler just for reliabiaty.

[jhennessy]

can the snow boost cooler be adjusted to come on at a specific boost?

[jhennessy]

as it is very rarely do I really get into boost around here...if only I had a twin screw...

[white35th]

Yes you can set it to a particular boost level and injection amount i beleve. I think the stage two syst would be what you want.

[jhennessy]

do you know whether or not this is something that can be accounted for in a custom tune that is written/included in the purchase of a tuner?

[white35th]

do you know whether or not this is something that can be accounted for in a custom tune that is written/included in the purchase of a tuner?

To a certin extent it can. you will want to keep it conservitive. How good it is depends on your tuner. If you have a sct and a laptop and the logging software (free) you can do a pretty good imitation of a dyno with a third gear run on the road.

[jhennessy]

To a certin extent it can. you will want to keep it conservitive. How good it is depends on your tuner. If you have a sct and a laptop and the logging software (free) you can do a pretty good imitation of a dyno with a third gear run on the road.

I've been corresponding with JDM and I'm thinking they may be who I go with for my tuner...the SCT xcalibrator 2 is what they've recommended - have you done the dyno imitation with your Mustang? - I appreciate your guidance in all of this!

[white35th]

I've been corresponding with JDM and I'm thinking they may be who I go with for my tuner...the SCT xcalibrator 2 is what they've recommended - have you done the dyno imitation with your Mustang? - I appreciate your guidance in all of this!

The Xcal 2 is what i have and I have done the third gear run a few times altho my inital tune was on a dyno you can log it on your computer and send the file via email to your tuner. He should be willing to send you the set up file for what he wants to see. you can log about 20 parameters at one time. By the way if you are running the chip that comes from vortec in your car at the moment it has a too aggresive timming for the boost you are running without some type of charge cooling so be gentle with it until you get a good tune set up.

[jhennessy]

Murillo motorsports tuned it using an SCT chip on their mustang dyno back in january at 10lbs boost - the 12.1 in my sig was the consequence of high humidity and took place after I put 1500mi on my new engine. I did have a predator before I had the blower put on so I am familiar with those but I have no experience with SCT tuners - do you know the specific differences?

[white35th]

Murillo motorsports tuned it using an SCT chip on their mustang dyno back in january at 10lbs boost - the 12.1 in my sig was the consequence of high humidity and took place after I put 1500mi on my new engine. I did have a predator before I had the blower put on so I am familiar with those but I have no experience with SCT tuners - do you know the specific differences?

I have no exp at all with the predator a Murillo dyno tune is good. They prob have the timming pretty mild to compensate for no cooling but you should still be carefull on a hot day. I think the SCT is the way do go with lotso mods.

[jhennessy]

I have no exp at all with the predator a Murillo dyno tune is good. They prob have the timming pretty mild to compensate for no cooling but you should still be carefull on a hot day. I think the SCT is the way do go with lotso mods.

what parameters can you manipulate with the SCT tuner and what parameters are monitored when data logging with a laptop??

[white35th]

what parameters can you manipulate with the SCT tuner and what parameters are monitored when data logging with a laptop??

As far as loging the list is long anything the computer knows can be logged
maf volts iat iac tps fuel pumb duty cycle air\fuel batt volts power temp o2 volts rpm speed and about 80 others. anything the computer can change can be adjusted in the tune by the dealer. you can also get a file that lets you make some adjustments on the unit itself timming, idle, speedo call, and a couple of others.

[jhennessy]

yeah, JDM is saying that they cannot send a tune for the meth injection without having the veh on a dyno...

[white35th]

yeah, JDM is saying that they cannot send a tune for the meth injection without having the veh on a dyno...

If you are carefull you can prob use mine as a starting point. your mods are about the same as mine were when I started. Or you can get them to send you a tune that is based on no injection because the injection is an added safegard agianst detonation. I can even look at my mafia setting and see where to
set yours to match my tune. then go with the third gear run. Or get in touch with justin at VMS he has my records and is a sct dealer

[jhennessy]

If you are carefull you can prob use mine as a starting point. your mods are about the same as mine were when I started. Or you can get them to send you a tune that is based on no injection because the injection is an added safegard agianst detonation. I can even look at my mafia setting and see where to
set yours to match my tune. then go with the third gear run. Or get in touch with justin at VMS he has my records and is a sct dealer

that would be awesome! I would greatly appreciate that! It might be a little while before I am in a position to follow through with everything but I will be sure to send you a PM - thanks!

[1quik46]

You could always go with my tune.....GET A COBRA!!! JK

[jhennessy]

trade ya!'

[1quik46]

Race ya! JK. Hows everything?:40oz:

[jhennessy]

Race ya! JK. Hows everything?:40oz:

everything is good to go!! My wife is so appreciative of my ability to rise above and beyond the call of fatherhood that she's offered to commit to a minor upgrade on the Mustang!! I'm not sure if it is she that is talking of the hormones following pregnancy...Think I should take advantage?? (j/k, I would never take advantage - but I will be reminding her later on of the offer...!)