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Running AVCS heads/intake


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#1 Braydon

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    • 1989 Legacy RS rally car
      1996 FTO GPX
      2008 Fairmont Ghia
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Posted 12 February 2020 - 8:29 PM

So I had a minor issue with my engine. 
Minor being that it dropped two valves and destroyed a piston and I'm pretty sure the head...

 

So I'm looking at other options, and one idea was to run some quad AVCS heads, if I can source some, from a late EJ207 or something along those lines. 
I'm going to assume this has been done before, and I understand it shouldn't be an issues mounting to the 20G block, just ensure I get the correct thickness head gaskets, and to use a set designed for the 20G.

 

The one thing I'd like to confirm is clearance for an intake manifold, and which to run? 
Obviously I wouldn't be able to run my early manifold since the bolt pattern changed, but what would be the best to run and still fit under the RS bonnet?

Also happy to take other suggestions for heads to run :)


EJ20G CDB

Forged internals

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#2 Braydon

Braydon

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  • Location:Dunedin
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    • 1989 Legacy RS rally car
      1996 FTO GPX
      2008 Fairmont Ghia
      2013 Leaf X

Posted 12 February 2020 - 8:39 PM

Bonus: pics of the damage:
 

 

 

 

 

FDBKoCj.jpg?1

 

J2rQO45.jpg?1

 

5dXv6YM.jpg?1

 

Yes, that's a spark plug, not a sump plug...


EJ20G CDB

Forged internals

V3 WRX STI RA Heads

VF22

Link G4+

Race Technology Dash 2

 


#3 DCVR

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      1989 BF Legacy

Posted 14 February 2020 - 2:14 AM

damn!  you did a good job on that!


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#4 Subiandy

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Posted 03 March 2020 - 4:23 AM

Ive run both a  V7 sti (+tgvs) and V8 Sti (long runner, no tgvs) with 12mm manifold spacers and no clearance issues. I even have the manifold rotated and no clearance issues. 


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