should i change to fuel injection

[sphy1005]

i have a 73 240z with an L28. would it be better to run FI if so what would i need for the conversion. thanks

[agemeansnothing]

The ian monster asked this same question so if you do a quick search I think you can find it or, you can go to "The Ian Monster's" profile and go to all threads started by him and you'll find it. And yes you should switch but you'll have fun with it.

[agemeansnothing]

Actually sorry, my worst mess up yet he was talking about a transmission switch. Sorry, but search the archives and see what you can find.

[chickenwafer]

fuel injection offers better reliabiltly, but depending on your set-up and horsepower goals, they're aren't the best for performance, but usually are. At the least, you will need:

intake manifold

fuel rail

fuel injectors

ecu

throttle body

air filter

o2 and MAF sensors

and a gas tank, fuel pump, fuel line and return line from a 280Z.

Hope this helps.

BTW: When you got the L28 was it just a short block so you added a carb intake manifold and SU's, or did you convert from FI back to carb for some reason? Just wondering, because L28's are FI stock to begin with.

Dave

[Arne]

The early '71 that I will be picking up in a few weeks has an injected L28 in it, from an '83 280ZX. I strongly suspect that I will end up converting it back to SUs, but I may have differing goals for my car than you have for yours.

Anyway, if you'd like, once I have the car in my possession, I can assess the injection and take some pictures for you if you'd like.

[sphy1005]

when i purchased the car i had this setup in it already. the car drives good but is burning oil at the rate of about 1 or so quarts a week. i was going to rebuild the motor. i've done alot of late model turbo cars (supras, 240sx's, honda's, mitsu's, etc...) and like turbos.

[sphy1005]

my goals, as with most people, is more power. i figured with the FI i could turbocharge the motor and achieve more power. also i have an extra intercooler, piping, turbo and a few other turbo stuff. and could make the manifold myself.

[chickenwafer]

Well, obviously, if you want to go turbo you need fuel injection to keep up. And more power is always a better thing!

Burning 1 quart of oil a week!? Is this car your daily driver or just a weekend warrior? Reguardless, you have a serious problem on your hands. You could have a bad head gasket. And I would advise to rebuilding the engine BEFORE you add any level of boost to it. So, if possible, you should pull the engine, rebuild it, convert it to FI (or EFI from a ZX would be better) and then add a turbo system.

Dave

[Jayru]

Maybe i'm an exception, and i'm probably jinx'ing myself right now, but i love my SU's. This was my first ever carberated car and i was real skeptical of the SU's, and carbs in general.

I spent a little time studying how they work, then tuning them, and my car runs great. It starts and runs great right away (even when ice cold in the winter).

Everyone seems to think their (SU's) tempermental, a pain to tune, and not as good/reliable for daily driving. I don't see how that's true, unless of course i just have been lucky so far. :classic:

*edit* Didn't read your last post about power and turbocharging...

[boostedz]

i have a 73 240z with an L28. would it be better to run FI if so what would i need for the conversion. thanks

But it is what you would want to do. There is NO substitution for FUEL INJECTION period, if you want more power FI is the way to go.

If you do plan to boost you still can use a carbureted set up and there are people that are running a carbed set up and doing quite well turbo charged.

In the end it is all up to you and what you want to do.

As far as you burning a quart of oil that could be several things, but I would hardly think or believe it is a head gasket. It is more likely worn valve stem seals, or bad piston rings.

Either or can be detected by a leak down and compression test.

You can turbo your current block but, it would be better for you in the long run to at least get the bottom end from a turbo. Reason being is stronger pistons and ringlands and rods.

Also it isnt a good idea to run a turbo motor on an NA cam, though you can, I wouldnt plan on running more the stock boost levels of 7psi.

Parts you would need are as follows

Intake manifold

Exhaust manifold

Turbo charger

Fuel rail and injectors

AFM Air flow meter

Turbo down pipe

Turbo J pipe

Turbo fuel pump

O2 sensor for AF ratio

Turbo ECU

Turbo engine wiring harness

and I think that about has you covered.

[sphy1005]

thanks everyone.. i had mentioned burning a quart of oil because i was planning on rebuilding the motor, either for turbo or n/a. i've decided to go turbo and FI. i've seen the carb turbos and am just not familiar with that set up.