how to install walbro fuel pump Options

[zavnet]

Is there a write up on this site about the procedure? .. i have a 255 psi pump to install but i don't have the end clip for it. and do u think it will add some Hp once i combine it with the MSD igniter and HKS limiter for the 3sge Non beams?

[Smaay]

it will add volume but thats it, and you dont have to drop teh tank, just pull out the back seat, the pump assembly is right there. but unless you are boosting, you dont need it.


this is the stock pump assembly by the way


This post has been edited by Smaay: Aug 18, 2010 - 3:43 PM

[zavnet]

it will add volume but thats it, and you dont have to drop teh tank, just pull out the back seat, the pump assembly is right there. but unless you are boosting, you dont need it.


this is the stock pump assembly by the way

Thanks for ur reply.....i c now thats under the rear seat...... so question......... even though i am adding the msd igniter and the hks.. i will not need the fuel pump if i am not adding turbo?

[enderswift]

it will add volume but thats it, and you dont have to drop teh tank, just pull out the back seat, the pump assembly is right there. but unless you are boosting, you dont need it.


this is the stock pump assembly by the way

Thanks for ur reply.....i c now thats under the rear seat...... so question......... even though i am adding the msd igniter and the hks.. i will not need the fuel pump if i am not adding turbo?

I highly recommend learning a bit more about modern fuel injected engines before attempting to mod anything. Not trying to be a dick in any way, but you can only hurt yourself if you just slap on parts because they sound like they would improve something.

heres the wrong reasoning:

"more fuel = more power"

true, but only under the right circumstances. The stronger spark from the MSD wont give your engine any more air. And in fact I think its safe to say that the MSD is overkill unless your running insanely high compression ratios or high boost. The HKS rev limiter WILL allow you get more air through the engine per unit time but you have to be careful. Rev too high and something might shatter from the force of it all. Also, how sure are you those extra few hundred rpm will really make the most out of the air? This isn't a beams so revving higher will go past the motors volumetric efficiency, thus offsetting any gains from the extra air. I guess a good way of explaining it would be to say that by spinning the motor say 500 rpm past the redline you move X more air per unit time causing the motor to dump more fuel and make X more power. However because the motor is a giant air pump, it takes more power to spin the engine those 500 extra revs, thus offsetting any gains. Taking the 5sfe as an example, the motor is out of its volumetric efficiency range at anything past ~4800rpm; after which point it feels that the engine is just getting louder but not really accelerating the car. One way Hondas fight this is with having multiple cam profiles which in essence change the efficiency range of the engine on the fly. On top of all this you also have to realize that there is a trade off on your hands with the limiter: more power in exchange for putting the motor at risk. Toyota engines are strong but not indestructible, and the factory engineers decided on the stock rev range for a good reason. Either way the stock fuel system should be more than able to keep up with the increased rpms. So hold off on the fuel upgrade until you have the proper mods that will make use of it.

the right reasoning:

"I increased engine air intake either through forced induction, or cams, or a dry shot of nitrous. Now I need to increase my fuel to compensate for the extra air and prevent engine knock/preignition"

There are SO MANY variables to take into account when modifying an engine that you really have to have an in depth understanding of what all the systems are doing and how they affect each other. What I wrote above is just a fraction of the thought process that should be running through your head while picking things to modify. Otherwise you're just shooting in the dark.

This post has been edited by enderswift: Aug 18, 2010 - 6:21 PM