It seems there are a number of ways to solve the fuel issues we get when boosting high in the msp. I would like to do what some of you have done, or would reccomend doing to get enough fuel to the msp to boost 12+psi. I know there is no right or wrong...but what is the easiest and cost friendly way to fuel managment????
Fuel managment
- Thread starter jonbig
- Start date
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- 2001 Mazda MP3
get the MPI tuner.
UnNaturalinc
Formerly"HorsepowerFreak"
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- '03.5 MSP, '87 RX-7 TII, '80 Chevy Luv, '05 Honda CRF230
I have the Unichip...
Any sort of unit where you can change fuel, timing, boost maps is what you want.
Any sort of unit where you can change fuel, timing, boost maps is what you want.
BinaryRotary
Member
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- 03 MSP, 85 RX-7 GS, 90 RX-7 TII
Your injectors are only going to push so much fuel.
UnNaturalinc
Formerly"HorsepowerFreak"
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- '03.5 MSP, '87 RX-7 TII, '80 Chevy Luv, '05 Honda CRF230
brennan said:
You mean a fuel pressure regulator? Those just increase/decrease fuel pressure, they don't do anything for computer-controlled maps.
UnNaturalinc
Formerly"HorsepowerFreak"
- :
- '03.5 MSP, '87 RX-7 TII, '80 Chevy Luv, '05 Honda CRF230
Vortech calls their fuel pressure regulator an FMU. I don't see anything on the BEGi site.... (FMU manages fuel, EMS manages entire engine)
So no, those units are not going to do the same as an EMS.
So no, those units are not going to do the same as an EMS.
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- 2001 Mazda MP3
if you run an MPI, you'd also want a voltage clamp so the ECU wouldn't try and PULL fuel.
BinaryRotary
Member
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- 03 MSP, 85 RX-7 GS, 90 RX-7 TII
Okay lets bring some clarity to the situation. If you decide on a mechanical means for fuel management you need a RISING RATE fuel regulator.
www.essentialspeed.com/shop/detail.asp?product_id=ESmspdstage3
This allows you to run 12 psi safely apprently, it is some sort of fuel thing, but now they sell the BEGI one, I've seen it they just don't have it on there site yet it says BEGI on the Unit
This allows you to run 12 psi safely apprently, it is some sort of fuel thing, but now they sell the BEGI one, I've seen it they just don't have it on there site yet it says BEGI on the Unit
UnNaturalinc
Formerly"HorsepowerFreak"
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- '03.5 MSP, '87 RX-7 TII, '80 Chevy Luv, '05 Honda CRF230
brennan said:
Well as explained, that is just a raising rate fuel pressure regulator. They don't do anything besides increase the fuel pressure... I disagree that's all you need to run 12psi safely. It takes more than just an increase in fuel pressure to "tune" a vehicle. The BEGi one does basically the same thing.
Call me paranoid, but I really don't want to pop the motor in my car. I've kept things reasonably safe. Every time we have increased boost we've had it on the dyno keeping an eye on a/f ratios. I'm not doing any other modifications to the engine until I get my fuel situated. I need to add a 5th injector, I'm near the point of all my injectors can take.
I have the BEGi FPR in my car (actually it's not plumbed in yet). The reason I chose that one because Corky Bell has done a LOT of Mazda work and very well known in the Mazda world.... Not to mention it's a great product, defiantly an attention getter with that shape.
From Vortech's website-
"What is an FMU?
The letters FMU stand for "Fuel Management Unit". Basically, an FMU is a fuel pressure regulator. The FMU is used on fuel injected, supercharged engines using the factory electronic engine management system.
When an engine is supercharged the air delivered to it is greatly increased. For the engine to run properly and make max power a 11.5:1 air/fuel ratio must be maintained. Since the factory electronic controller can compensate for this increased air flow (it was not designed for supercharger use) another way has to be found to supply the necessary additional fuel. The FMU is the device that does this.
The FMU is installed just down stream of the stock fuel pressure regulator. It does not control fuel pressure until the engine manifold pressure comes under boost from the supercharger. As the manifold pressure increases, a pressure line from the manifold to the FMU causes the FMU to increase the fuel injector rail pressure. The increased fuel pressure causes the injectors to deliver more fuel to the engine. With this system the stock factory electronic controller can be used without modification on a supercharged engine with good results. The reason the Vortech supercharging systems are smog legal is because the stock controller is retained unmodified and at part throttle the engine's performance and emissions are not effected."
UnNaturalinc
Formerly"HorsepowerFreak"
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- '03.5 MSP, '87 RX-7 TII, '80 Chevy Luv, '05 Honda CRF230
There is no formula to say "this much boost will make your engine pop". Some cars will be able to get away with things that others will not.
ghostp5, what do you have for fuel/engine management?
ghostp5, what do you have for fuel/engine management?
12/1 Vortech FMUHorsepowerFreak said:
I got your pm here is the link.
http://promazda.com/forum/vbgarage.php?do=view&id=4
thats cool to know ghost cuz im getting a t3/t4 from turbonetics soon and have that same FMU that im gonna use. I know there is still that chance I will blow my motor but thats some weight off my shoulders to here your pushing 9-10 psi with a t/4. You do have stock internals right? Also I thought about going two stages colder on the plugs also wich ones do you have?
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UnNaturalinc
Formerly"HorsepowerFreak"
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- '03.5 MSP, '87 RX-7 TII, '80 Chevy Luv, '05 Honda CRF230
Honestly... I think I'd rather have a Haltec than a turbo upgrade. There's just so much power wasted on late model cars!
ghostp5, nice car man! Thanks for the pics....
ghostp5, nice car man! Thanks for the pics....
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- 2002 BJFW, 2007 BK3P, 1979 SA22C, 2005 BK3P
i popped the motor in my car using a BEGi FMU/RRFPR at 12 psi. I would personally not go higher than 8 psi on 93 octane gas on an FPR. Why? Because Corky Bell told me so 
That said, I think RRFPRs are excellent to a point if you are patient with tuning it and have half a brain cell. I've been using one for over 30,000 miles now.
I will be switching to the new windows based Haltech next week some time.
That said, I think RRFPRs are excellent to a point if you are patient with tuning it and have half a brain cell. I've been using one for over 30,000 miles now.
I will be switching to the new windows based Haltech next week some time.
