GM EFI system on a Air Cooled beetle

[EagleMark]

Here you go!

http://www.gearhead-efi.com/Fuel-Inj...BI-Conversions!

[ggenovez]

Thanks guys. I really appreciate it.

Billy brought up an interesting point about the TBI and my assumptions.

Rather than assume I know anything, why don't I ask the question in a different way.

If you had an air cooled VW, and wanted to turbocharge it and use EFI (with knock) what would the group recommend?

I know that megasquirt is available, but I think its too expensive VS a 7730 GM ECM. That being said, I am open to discussions. I don't want spend $300 to save $.05 right?

I know that air cooled Porsche's did use a knock sensor. The whole idea of using EFI was to protect the engine from detonation.

All that being said, if this was your project how would you do this?

Thanks again, I appreciate everyone's feedback...

[dave w]

A few years ago, I helped a co-worker with a supercharged air cooled VW. We initially used the '7730 with limited success. The Megasquirt system seemed more capable of dealing with the "One Off" nature of a supercharged air cooled VW. Shortly after we got the engine running with Megasquirt, my co-worker relocated to the east coast. I don't have any information on the progress of the project since he moved.

If I were to build a turbocharged air cooled VW engine today, I would use a Megasquirt system.

dave w

[ony]

them old 1968-1971 station wagons was port injected efi, they where pretty neat thay had a adjustable pressure regulater on them set the fuel pressure to around 29 pounds and get 35-39 mpg at 55mph. I don't know if a turbo would work on that type set up. I seen super chargers on the old bugs in magazines a long time ago. what cc engine do you have? I had a 4barrel afb on a 1800 cc with a 110 ingel cam it would fly.

[Scorp1us]

Your mods would be pretty standard I think. You would only need a 2bar MAP and do a standard dist conversion (points to electronic pickup)
Maybe use a setup off a pontiac firebird?

[delcowizzid]

you dont need knock sensing to be safe its just there so if you fill up with crap gas it has some sort of way to limit low octane detonation and to keep you out of trouble with pump or sensor failures i run so many cars with no knock sensors its not funny if hey dont have them stock i dont add them LOL.running cars into the tens with no knock control N/A and turbo converted.ide be following the thread i posted above and using 1227165 ecu and the 2 and 3 bar code we use for them down in newzealand/aussie its made for the job and the xdf is pretty much the most fully defined youll find.

[ggenovez]

Delcowiz,

My apologies, I didn't realize the the pulsar used a GM ECM.

That makes thing much clearer. Ok, couple of questions for you.

First off, what year range is that pulsar?

Does the 1227165 see boost ( are the tables big enough ?)

What did the CTS come from and how was it connected to the head?

What do you mean by 2-3 bar code?

What was the donor vehicle for the injector ports. Recommend any alternative?

I agree that you don't "need" a knock sensor, but I've found it's easier to tune them when you know when the engine begins to knock and you back it off from there. What would you recommend for tuning an engine without a knock sensor?

Thanks again.