Fuel Injection

[Guest Anonymous]

Anyone have experience with fuel injection? We have been restoring a 76 and been through 3 webers in 3 years. We are looking for the best solution. Any advice would be appriciated.

[Guest Anonymous]

I'm a big fan of MegaSquirt (no surprise there), SDS is also popular. The easiest setup is to use a 318 intake manifold, fuel rail and pressure regulator with a 88+ E30 fuel pump.

If you want more power, replace the 318 injectors and add a larger throttle body.

Steve and Rob have been promising a FAQ writeup. I know I sent them some pictures and a brief description.

Cheers!

John N

[Guest Anonymous]

The most simple injection conversion would be the L-Jetronic from a 1984-85 318i. It is nice for all around use, it is also tuneable, but it has some limitation.

If best means all-out power and tunability, then opt form something programable. It is not as straight forward but it is more rewarding in term of performance.

My car has seen the L-Jetronic conversion, and then I moved to an SDS system.

[Guest Anonymous]

The most simple injection conversion would be the L-Jetronic from a 1984-85 318i. It is nice for all around use, it is also tuneable, but it has some limitation.

If best means all-out power and tunability, then opt form something programable. It is not as straight forward but it is more rewarding in term of performance.

My car has seen the L-Jetronic conversion, and then I moved to an SDS system.

[Guest Anonymous]

in the high pressure fuel line (in addition to assembling all the pieces). No matter what route you go, you still need to wire in the injectors, add coolant temperature senders, pull some spark signal off the disti and add an O2 sensor.

If you go L-Jet, you have to plumb in (and pay for) that damn AFM. If you go aftermarket, you can stop with the above (alpha-N), or add a vacumn hose for the MAP sensor and add a air temperature sensor (MAP based control).

For the extra control and programability, its seems a no-brainer to go aftermarket.

Cheers!

John N

[Guest Anonymous]

need to also wire in a TPS. (well it's only kinda a TPS with L-Jet). If you're going alpha-N you need a 'real' TPS, if you're going MAP based, a TPS is a nice-to-have.

Cheers(again)

John N

[Guest Anonymous]

We are looking for a reliable alternative to a Weber. This car is a daily driver for my son and he needs something that we can expect reliability without alot of upkeep costs. Good fuel economy is also important.

[Guest Anonymous]

John, we are leaning for the L-Jet unless there is a better aftermarket product. Where can I find info on how to do the L-Jet retrofit? What years of the 318 am I looking for? What is SDS? What was the cost and did you do the installation? Can a good back yard mechanic do this or should we refer this to a professional?

[Guest Anonymous]

a howler monkey / shade tree mechanic. If it were me, I wouldn't bother with the L-Jet conversion. I think the work is actually more complicated than SDS or MegaSquirt.

Do a google search for SDS. MegaSquirt is at: http://www.bgsoflex.com/megasquirt.html

Cheers!

John N

[Guest Anonymous]

Cost is around $250 and you're done. If you go to electronic injection, even the most simple swap (318i) will cost no less than $500/$600. You will need to plumb the car for high pressure fuel lines and do so harness work. Not necessary time efficient.