Apologies if these has been answered before - I couldn't see where it had.

 

Does an MPFI or SPFI EA82 have 3 valves per cylinder on an EA82? (2 inlet, 1 exhaust?) I have heard that MPFI is but can't verify it.

 

The NA spider manifold - is this available for both MPFI and SPFI.. or even carby model?

 

Will an SPFI manifold bolt onto a carby motor?

 

Thanking you in all advance!

All EA-82's have two valves per cyl. 1 intake, 1 exhaust.

To run a spider manifold, you must have MPFI heads.

An SPFI manifold will bolt right on in place of a carb manifold. It will also bolt on to an EA-81 carb block.

Hey Fang

 

The spider intake will fit both the mpfi and turbo heads

 

A spfi manifold will bolt onto the carb heads, (there is a conversion manual floating around) but unforunately Australia didnt get any spfi Subes

 

 

 

Gannon

Yes I was just toying with an idea. I thought I had read somewhere that MPFI heads at the very least, were 3 valves per cylinder (2 intake, 1 exhaust)

 

My theory was, and it might be totally un-realistic / not worth it, is to put MPFI heads on my car - use a NA spider manifold - and adapt it to put my Weber on it. Obvioulsy some welding would have to be done on the manifold.

 

The point of this, would be to use to the head with two inlet valves with my Weber. That was assuming they exist

 

I am no mechanic and I'm still learning bout different options in Subes so forgive me if its not the greatest idea

Sorry, you're limited to two valves, one intake, one exhaust.

why do you want a carby? i know there simpler, but if you want performance you'd wanna go EFI. I met a guy with a EA82turbo and it seemed to go pretty hard. He used to run a EA82 MPFi and he said it was pretty good, but the turbo is heaps better.

The confusion might have arisen because the MPFI (N/A or turbo) has two intake PORTS and one exhaust PORT... per head. The carb/SPFI heads have one intake and one exhaust port per head

why do you want a carby? i know there simpler, but if you want performance you'd wanna go EFI. I met a guy with a EA82turbo and it seemed to go pretty hard. He used to run a EA82 MPFi and he said it was pretty good, but the turbo is heaps better.

A good question Phizinza. I have recently been involved with converting a carbied EA82 to an MPFI EA82. It was an absolute SOD of a job. Way too much pain for me - I'd rather leave it as a carby model. The wiring is not there for computers, etc in a carbied car. The fuel tank is different. It was just so much for pain for us. If I ever travel that route - It will be with an EJ20.

 

 

The confusion might have arisen because the MPFI (N/A or turbo) has two intake PORTS and one exhaust PORT... per head. The carb/SPFI heads have one intake and one exhaust port per head

I think you hit the nail on the head there, Northwet - I would say the miscommunication came from this. Question is would the dual intake ports be any better than the heads on a carby car? Or just "not worth it"?

 

Thanks to all who have put forward their 2 cents worth so far

I remember seing a picture of a modified spyder intake with a carb on top, but it was a while ago

... Question is would the dual intake ports be any better than the heads on a carby car? Or just "not worth it"?...

It could give you greater potential, assuming that you take advantage of it with a decent intake manifold. The heads aren't that much different, so other than replacing them, mounting the manifold, and any changes needed for the manifold (linkage, hoses, wires) it shouldn't be too hard. BTW, the turbo heads are the same casting as the NA MPFI heads, except that the non-distributor head ("passenger-side" in the USA) has cast bosses drilled and tapped for oil and coolant plumbing, plus the turbo cams are a "mild" grind compared to NA MPFI and SPFI cams.

It could give you greater potential, assuming that you take advantage of it with a decent intake manifold.

 

I couldn't agree more with that statement...

Seperate intake runners will wake-up an engine as compared to a single runner.

Just wish there was a dual port exhaust head available for these engines, that would be the