For all u TURBO experts
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For all u TURBO experts
ok so i jus found out that instead of gettin a whole new computer fr fuel modification i can jus get a better fuel pump.now is this modification possible or not. and i also heard that the 7th gens injectors r larger than the last gens.soooo wuld this fuel pump idea work with lets sayyyyyy a 3 to 4 psi turbo.
oh and with this psi how much u guys think my car will do 0-60 in. keep in mind its a sedan.
oh and with this psi how much u guys think my car will do 0-60 in. keep in mind its a sedan.
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Rep Power: 291 It is my understanding that honda map sensors can read boost up to 11psi so which means that it can adjust the injectors up to 11psi so if you dont run over 11psi you should be allright.
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[hr]Originally posted by: Atl01
It is my understanding that honda map sensors can read boost up to 11psi so which means that it can adjust the injectors up to 11psi so if you dont run over 11psi you should be allright.[hr]
[hr]Originally posted by: Atl01
It is my understanding that honda map sensors can read boost up to 11psi so which means that it can adjust the injectors up to 11psi so if you dont run over 11psi you should be allright.[hr]
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Wrong, wrong, wrong.
The MAP sensor can read up to 7psi, but the ECU is not programmed to add fuel at any boost level. All you'll get is a check engine light and a blown engine. Just because the MAP sensor can read the boost level doesn't mean that the ECU knows what to do when it gets that signal.
The MAP sensor can read up to 7psi, but the ECU is not programmed to add fuel at any boost level. All you'll get is a check engine light and a blown engine. Just because the MAP sensor can read the boost level doesn't mean that the ECU knows what to do when it gets that signal.
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Rep Power: 0 man i wuz thinkin 5 to 6 psi but i jus want a turbo that can run without the need of a whole new EMS.and riceburner keeps scarin me with that blown engine thing.by the way riceburner i appreaciate ur advice n all but i kno of this guy who ran a 22 psi turbo on an 88 corolla with no fuel mods or changed internals and u keep tellin me of this blown motor thing.can u plz proove this theory.and if i hav a bigger or better fuel pump want it add more fuel.and i also found a solution fr that chek engine light thimgey : u jus prelong the pipe where the sensor is according to the boost u set. soooo can this b done.
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Rep Power: 419 You can run all the psi you want with 0 fuel system modifications, but you need to cool the intake charge down like a **** to prevent detonation. 0 hot spots in the combustion chamber, thick cylinder walls, heavy pistons, stout crank, stout rods, stout everything. Weld the f*****g head down to the block. Weld the spark plugs in. Run high octane and put in octane booster. Intercool that bish. Run very very lean and get serious heat.
That's why you want the air/fuel ratio to be stoich. 14.7:1 for low emissions and good fuel economy. 12.6:1 for the most power. Anything else is either too rich or too lean. Although running a little too rich for lots of boost can cool down the intake charge and prevent detonation.
Anyway... For 3-4psi you'll still need to add more fuel since you're adding more air. The car's EFI sensors (mass air, o2, and so on...) will sense this extra air and will try to compensate for the extra air slightly, but they're not designed to operate way above atmospheric pressures. They're designed to operate from sea level (where the highest pressure is) to as high up as Pikes Peak in Colorado (almost 2 miles above sea level). You can kinda reverse engineer how much boost this allows. Although if you live at sea level then you can't really expect the fuel system to compensate for any more pressure. Not that it won't, but it'll start to be more and more out of spec.
Now, you want to modify the fuel pump. Not necessary for 3-4psi. HKS said this themselves in their forum when they were working on a turbo for our cars. You could upgrade the fuel pressure regulator though. Then hook up something that varries fuel pressure as boost rises. Although you'll need rpm control too. So, more boost and more rpm equals more fuel. That's one way to do it.
I'm a big advocate of Greddy's E-Manage. Look up my post in Tech Stuff about it. Good stuff. It's basically THE solution for our returnless fuel systems. RSX's, 2002 Civic Si's, and us. We can all use it and use it well. There are a few RSX's and 2002 Si's that use the Greddy E-Manage and it works beautifully. This is what I will get myself. [IMG]i/expressions/face-icon-small-smile.gif[/IMG]
That's why you want the air/fuel ratio to be stoich. 14.7:1 for low emissions and good fuel economy. 12.6:1 for the most power. Anything else is either too rich or too lean. Although running a little too rich for lots of boost can cool down the intake charge and prevent detonation.
Anyway... For 3-4psi you'll still need to add more fuel since you're adding more air. The car's EFI sensors (mass air, o2, and so on...) will sense this extra air and will try to compensate for the extra air slightly, but they're not designed to operate way above atmospheric pressures. They're designed to operate from sea level (where the highest pressure is) to as high up as Pikes Peak in Colorado (almost 2 miles above sea level). You can kinda reverse engineer how much boost this allows. Although if you live at sea level then you can't really expect the fuel system to compensate for any more pressure. Not that it won't, but it'll start to be more and more out of spec.
Now, you want to modify the fuel pump. Not necessary for 3-4psi. HKS said this themselves in their forum when they were working on a turbo for our cars. You could upgrade the fuel pressure regulator though. Then hook up something that varries fuel pressure as boost rises. Although you'll need rpm control too. So, more boost and more rpm equals more fuel. That's one way to do it.
I'm a big advocate of Greddy's E-Manage. Look up my post in Tech Stuff about it. Good stuff. It's basically THE solution for our returnless fuel systems. RSX's, 2002 Civic Si's, and us. We can all use it and use it well. There are a few RSX's and 2002 Si's that use the Greddy E-Manage and it works beautifully. This is what I will get myself. [IMG]i/expressions/face-icon-small-smile.gif[/IMG]
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