Nippy,

It's a good idea replacing the crimped fuel lines. What type of fitting are you using here instead?

Got all the fuel lines done at Amazon in Tampa.They have done a bunch and basically have it down pat.

I have a build thread on the whole car here

http://forums.pelicanparts.com/porsche-911-technical-forum/561435-my-6k-porsche-911-a.html

Conversion under way
 

I've started the 3.2 Carrera intake to 3.0l swap on my Bitz EFI system.



Generally speaking, it is a simple bolt-on conversion as long as you have the right parts.



Parts/Mods needed so far:

*INTAKE STUDS: 51mm (overall length) I managed to snap one off while removing the old ones. :mad: Luckily, I have the tool to drill out the old stud from an earlier exhaust stud removal adventure last year. :cool: So be sure to let the studs soak in a little PB blaster no matter how "easy" the first 11 come out.

*SPACERS [The spacers will compensate for the different sized ports on both the manifold and head]: (Sourced from Clewett Engineering. Let Richard know what your doing and he'll set you up. Clewett Engineering, The complete solution for ignition & fuel injection)

*GASKETS: (Sourced from Clewett)

*REMOVAL OF ENGINE SHROUD: Need to increase the opening around the intake port to fit the spacer/manifold.

*I'm using the BITZ EFI system and will need to lower the support bracket securing the fuel rail and increase the length of nearly all the fuel hoses.

*I'll be reusing the AAR from my 3.0l intake and adapting it to the 3.2 intake.

*The throttle bodies are similar so all the existing hoses should swap over easily.

*The throttle will work with stock parts. The SC throttle base and the Carrera throttle body arm will hook directly up together. No mod needed. Thank you Porsche engineers.

Done. Relatively painless conversion for an aftermarket EFI system.

Thanks for all the help, guys.

(Read the updated FIRST POST.)

Are the spacers the same as the Porsche spacers, or are they different? And if they are different, do they use different gaskets?

I will do the same intake conversion in June and have the Porsche spacers and studs and nuts on hand.

Brian

I don't think the spacers are Carrera. (?) I havn't seen the ones I used and the Carrera ones side by side. Give Clewett Engineering a call and ask Richard.

I believe the gaskets (all 12) are Carrera. Again, ask Richard.

When you lay the gasket down on the SC manifold you'll see that it goes OVER the edge and leaves a small hole which would cause a vacuum leak. (?!) The spacer will fit on top and cover it so I put a little dab of gasket sealer to close it up. Hopefully it doesn't cause any issues.

I'll be starting mine up this weekend.

I fired the car up today and can hear a vacuum leak on one or two of the intake ports.

I'm pulling the manifold off again and will try the regular SC gaskets on the bottom to cover the gap that is created by using the Carrera gasket. Hopefully that will work ok.

did yo u you your 3.2 manifold checked to make sure each of the runners are perfectly fat at the head mating surface?

No, but I'll look when I have them off tonight. I had a bad feeling anyway with the gasket overhanging the edge. I'm pretty sure that's where my leak is.

Just a followup for anyone doing this conversion.

I removed the Carrera gaskets on the bottom (head side) and replaced with SC gaskets. This was a much better fit. I test fired and all is much better now. No leaks.

The throttle linkage posed a minor issue. The linkage DID connect with the stock Carrera arm but it was too short. Un-threading the ends of both the Carrera arm and the SC arm from below the car still wasn't enough to reach.

My solution was to use the SC throttle arm and bend it to the same angle as the Carrera arm. (The SC arm is much longer to begin with)

I unscrewed the Carrera arm and screwed in the SC arm onto the throttle body and it worked like a champ.

Not all that pretty yet, but here's a pic of it running last night. I don't like the blue fuel line either....

I attached the AAR to the front of the intake. (Filter solution is coming) Works great but still debating on weather I like it there. The wires will be cleaned up after I'm done re-tuning the Megasquirt and all is running well again.

{UPDATED FIRST POST}


http://forums.pelicanparts.com/uploa...1304700644.jpg

Kyle,
I know this was an old thread but hopefully you're still around. I'm considering the 3.2 manifold conversion on my '79 but I'm in a little different situation. The PO (or a PO way back possibly as the history of the car is pretty hazy) converted to some sort of Holly injection. I'd like to convert back and figure I might as well upgrade while I'm at it but not sure exactly what I'll be getting myself into. I don't have any of the original CIS parts so I'll be starting from scratch. Do you actually need something like the Bitz system to make this conversion work? I've wondered what the benefits of that are on a 3.2 since, unless I'm wrong, it's already EFI.

The main reason I did it was for the EFI system and the Carrera manifolds construction. (More solid and reliable) Some of it was for aesthetic reasons and some for performance.

I have a low compression (8.6?) ROW motor so your results may vary but I think I lost a little torque down low but may have gained a tiny bit up top. Pretty insignificant though. I don't think I lost or gained more or less 1 or 2hp if any at all.

I used the Megasquirt EFI system on it so using on anything else I'm not sure.

If it's already an EFI setup all you need to do is look at the total picture: You're just swapping out the manifold. The engine doesn't care how air enters the cylinder heads... You just have to see what would change if you removed the Holly set-up and replaced it with a Carrera manifold. e.g.: will the injectors fit? Fuel rail? Throttle linkage? Does the Holley have some sort of warmup/enrichment that is mechanical? (like Porsches WUR or AAR)

Actually, I don't see why not. But then I'm not there standing over the engine looking to see what you have.

The whole Holley system is going to have to be replaced for the conversion. As you can see from the pic, there's not much to work with. I think it's some sort of 2 barrel downdraft injection system. 2 injectors for 6 cylinders.http://forums.pelicanparts.com/uploa...1333746083.jpg
http://forums.pelicanparts.com/uploa...1333746132.jpg

No experience with the Holley injection system like that.

At a minimum you'd need fuel rails to feed the Carrera manifold and a wiring harness to feed the 6 injectors you'd have to add. And even then, would it work properly? Maybe...? And then there is the Holley ECU. Tuning? How would it know how much fuel to push through the injectors? And what type of injectors would you need? 30lb? Lots of unknown variables.

The Bitz Racing megasquirt system is about $1200, I think w/o injectors ($250). He still uses the Megasquirt 1 ECU. Upgrading to a II is just $90. It might be the way to go, there are other EFI systems out there too.

Thanks Kyle,
I have sourced a complete intake manifold and DME set-up out of an 88 targa. Includes manifolds, throttle body, airbox, fuel rails, injectors, DME, wiring harness and miscellaneous houses and solenoids/actuators. Any idea if I'm able to utilize all of this on a 3.0? Or is it just the manifold that will work w/ some sort of aftermarket EFI setup?

Here's a pic
http://forums.pelicanparts.com/uploa...1333762165.jpg

...did I miss something stated earlier in this thread = what is the benefit to put a Carrera intake manifold on an early 3.0L SC longblock...??
I understand more intake volume...but, what about exhaust...?? What about timing...?? What about any other engine mods required now that you are significantly increasing intake of air & fuel...??
Is this a plug & play with parts & an increase on hp...??
Thx for all of the input...interesting subject...

All in all, I think an aftermarket system would be easier. The Carrera system uses dual flywheel reference sensors and a cylinder head temperature sensor that would likely be expensive to reproduce on the SC setup.

using what manifold? I have to ditch the one currently on the car since it appears to be some sort of custom build or mod for the Holley system. BTW .. I learned over the weekend the my is a actually a 3.1L ROW

The Carrera manifold will work fine. You need to look into the cost of converting to the Carrera flywheel/sensor system and CHT sensor versus what it would cost to use the Carrera manifold as a base for an aftermaket conversion like this thread. You might want to start a separate thread for a complete discussion.