MPI MSP car now running 21psi

[MPNick]

Feul pump is alwayz on. And yes..a fuel pressure regulator like the rrfpr will add stress to the stock fuel pump.

Dean is not using a RRFPR. He is using the mpi tuner & extra injecotrs.

Stock fuel pump works fine..the reason why companies like Flyin Protege offered the inline fuel pump..was due to the huge increase in feul pressure the RRFPR created..which stressed out oem fuel pumps.

Chas

Chas is spot on here. If you look at almost any pump in the world, oil, gas, water, what ever. You will see the specs for the given pump. It will show the flow specs in, liters per minute or gallons per hour it will flow @ a set psi. They may also give you a spec that show the "Dead Head" psi. This means if you cap off the outlet how much total psi that pump will make. You will see that as you increase fuel pressure you will see the total output flow goes down. This is why most people with FMUs need to run two pumps or a bigger then stock pump. We run extra injectors so we do not need to change from the OEM fuel line pressure. The pump is not working as hard as when it is running a FMU.

How much can the stock OEM Mazda pump handle? I do not know for sure. I will dyno the car and see if we run out. If we do run out then will we add a inline pump.


Thanks again


Later.........Nick

 

[MPNick]

what kind of mileage are you guys getting with this setup (since it is a street setup) ?

That should be a two part question.

If Dean is driving around town like a sane driver and not hitting boost, is milage is better then stock. If he is driver around town like a crazy driver who is looking to get locked up in order to join a forum member in jail, then the car is a gas eating pig.


With the better intercooler, better air flow from the engine work and better tuning then stock the car and better overall package the engine does not need to be drivin as hard to as stock for most everday drives.

Under full power it does not matter if it is a turbo 4 or one of our built V-10 Vipers. For the most part it take X amount of fuel to make the same power. You can do the math, SBFC and come up with number for each engine. They all would be a little off, but power is power and the more you make the more fuel you need.


Thanks again


Late..........Nick

 

[MPNick]

i know of a couple people running blow by mafs right now and they have had no problems. Brianmp5t for one.

Also, with the haltech there is no need for a maf at all, i have a 3 bar map sensor that will fine tune better than any maf ever could.

Im just curious about whp and stock injectors.

-B

Even a broken clock is right two times a day.

People can do it but the problem is noise. Your signal noise goes up something like 5X when you do this. On some types of cars this is a problem more then others. At higher boost levels you will have problems.

Are you going to remove your stock MAF with your Haltech system?


Thanks again

Later...........NIck

 

[70]

You still can never go over 5.0 volts. You do tune for the bigger MAF. Flow is flow. When you try to flow more air then the stock MAF can handle you get a pressure drop across the meter. Now the small meter is costing you power. Some reach the limit of the stock MAF sooner then others. It is not cause by how much boost you are running it is caused by how much air flow you are moving. Big Tim was making around 230 whp @8 psi with a clean 4th gear pull. Look at others and you will see that they are running much higher boost levels to make the same power or even alot less power. Big Tim is running the MPI turbo system. It can make more whp per lbs of boost then most system, because it is well made.

An engine is a hot air pump. The more air and the cooler the air is going into the engine will get you more power.


Thanks again

Later....Nick

So the 80mm MAF runs in the 0-5 volt range? And becuase of its size it will not creat a pressure drop like the stock one will or can?

 

[MPNick]

So the 80mm MAF runs in the 0-5 volt range? And becuase of its size it will not creat a pressure drop like the stock one will or can?

Yes, it allows you to flow more air if you can and read a higher air flow and still be within the 5.0 volts.


Thanks again


Later..........NIck

 

[70]

Yes, it allows you to flow more air if you can and read a higher air flow and still be within the 5.0 volts.


Thanks again


Later..........NIck

Ok, cool...Thanks for the clarification.

How many cars then are running the 80mm MAF?

 

[azian6er]

Even a broken clock is right two times a day.

People can do it but the problem is noise. Your signal noise goes up something like 5X when you do this. On some types of cars this is a problem more then others. At higher boost levels you will have problems.

Are you going to remove your stock MAF with your Haltech system?


Thanks again

Later...........NIck

very true, very true.

with the haltech yes i will be removing the maf sensor and will be going with a gm 3 bar map sensor.

I will only be running 3.63 psi on the maf wth the stock ecu and bigger turbo for a very short period of time just to see what happens. The haltech is already set up i just need to switch a few wires to run it. I want to see what happens with the stock ecu and the bigger turbo for a very short while.

If you advise against this i might think differently, but i just kinda want to get the car running with the new turbo.

I plan on having it dyno tuned next end of next week with the haltech, 440s, 15-17 psi, and bigger fuel pump. (unless you think stock is adequate).

I really want to get this done soon so we can see what haltech and bigger injectors are capable of. We know what the mpi can do, not i want to see what the haltech can do.

Anywho, im just curious to see if you think i should pull the stock fuel pump for a high flow in tank denso or not. ( i have one readily available).

I may be needing to talk to you soon over the phone too to see what you feel would be the best route with a few other things. Do you think you could pm me your number?

Thanks again Nick.

-B

 

[MPNick]

very true, very true.

with the haltech yes i will be removing the maf sensor and will be going with a gm 3 bar map sensor.

I will only be running 3.63 psi on the maf wth the stock ecu and bigger turbo for a very short period of time just to see what happens. The haltech is already set up i just need to switch a few wires to run it. I want to see what happens with the stock ecu and the bigger turbo for a very short while.

If you advise against this i might think differently, but i just kinda want to get the car running with the new turbo.

I plan on having it dyno tuned next end of next week with the haltech, 440s, 15-17 psi, and bigger fuel pump. (unless you think stock is adequate).

I really want to get this done soon so we can see what haltech and bigger injectors are capable of. We know what the mpi can do, not i want to see what the haltech can do.

Anywho, im just curious to see if you think i should pull the stock fuel pump for a high flow in tank denso or not. ( i have one readily available).

I may be needing to talk to you soon over the phone too to see what you feel would be the best route with a few other things. Do you think you could pm me your number?

Thanks again Nick.

-B

Are you removing the stock PCM from the car? If not how will you send it a signal for air flow?

Thanks again

Later........Nick

 

[azian6er]

Are you removing the stock PCM from the car? If not how will you send it a signal for air flow?

Thanks again

Later........Nick

No i am not removing the stock ecu from the car. the only thing i will be using the haltech for fine tuning the fuel and timing. MAybe datalog with the innovative wideband too.

Anywho, in regard to the signal for airflow, the pcm needs not see a signal once the haltech is controlling fuel i thought. I ran the haltech on the msp with the maf sensor unplugged and it didnt cause a problem at all.

Isnt the only job of the maf to see how much air is comming in for fuel distribution to the cylinders?

If this is so then a maf signal will no longer be needed because the map is now taking care of that based on predetermined values placed in the haltech (or whatever) maps.

I could be wrong however.

All i know is that when my car was runnig with haltech i could unplug my stock maf sensor and nothing happened. No stalling with open vent BOV either. It was kinda nice.

-B

 

[MPNick]

No i am not removing the stock ecu from the car. the only thing i will be using the haltech for fine tuning the fuel and timing. MAybe datalog with the innovative wideband too.

Anywho, in regard to the signal for airflow, the pcm needs not see a signal once the haltech is controlling fuel i thought. I ran the haltech on the msp with the maf sensor unplugged and it didnt cause a problem at all.

Isnt the only job of the maf to see how much air is comming in for fuel distribution to the cylinders?

If this is so then a maf signal will no longer be needed because the map is now taking care of that based on predetermined values placed in the haltech (or whatever) maps.

I could be wrong however.

Is this a street legel car that has to get inspected evey year or two?

Thanks again

Later........NIck

All i know is that when my car was runnig with haltech i could unplug my stock maf sensor and nothing happened. No stalling with open vent BOV either. It was kinda nice.

-B

 

[azian6er]

i think you wanted to answer my Q but i think it may have been deleted nick.

-B

 

[azian6er]

i think you wanted to answer my Q but i think it may have been deleted nick.

-B

oops i found it in your quote.

and no it doesnt have to be inspected luckily (thanks ohio!)

is that the only function for the maf though?

-B

 

[MPNick]

i think you wanted to answer my Q but i think it may have been deleted nick.

-B

I wanted to know about how you handle getting the car to pass inspection?

Thanks again

Later.....Nick

 

[KzA]

Deans MSP is running a Greddy Type-S BOV correct?

As far as actual tuning, how are you compensating for the atmospheric release of boost pressure? Does he have a ZERO stalling issue with the BOV? If a BOV setup can be tuned to run WELL on a protege with the MPI, then I will get one, I just need to know how well it is running for you guys..

 

[MPNick]

Deans MSP is running a Greddy Type-S BOV correct?

As far as actual tuning, how are you compensating for the atmospheric release of boost pressure? Does he have a ZERO stalling issue with the BOV? If a BOV setup can be tuned to run WELL on a protege with the MPI, then I will get one, I just need to know how well it is running for you guys..

He is running it as a by-pass valve. The valve you have right now is about the best for you set-up.

Thanks again


Later..............Nick

 

[speedhawaii]

If Dean is driving around town like a sane driver and not hitting boost, is milage is better then stock. If he is driver around town like a crazy driver who is looking to get locked up in order to join a forum member in jail, then the car is a gas eating pig.

ouch! but true

 

[ddogg777]

So, anything break yet MPNIck??

 

[MPNick]

So, anything break yet MPNIck??

No but give it time. Dean forgot about the boost factor and tried running pump gas @21psi. It hurt a plug real quick. The leak down is still good in that hole for now.


Thanks again


Later........Nick

 

[ddogg777]

Pump gas at 21psi?! Tell him to buy some Torco or something. I can't have him breaking things, I fear for my own car.

 

[MPNick]

Pump gas at 21psi?! Tell him to buy some Torco or something. I can't have him breaking things, I fear for my own car.

We ran out of time and never got make a "B" map for the 21psi. We are hoping that we do not have to do any rering work on it.


Thanks again

Later........Nick