VN S1 Manifold Converting To S2

[rob drag racer]

i dont think theirs relay any gain from changing them i looked into it seeing i have the s1 vn now and have all the s2 spares they flow the same but as said they might run a touch cooler not sure

 

[Nevyn]

I think you have to drill holes in the heads as well to match up the water flow

 

[delcowizzid]

the only hole needed is the PCV valve hole in the drivers side head if you want to use S2 pvc valve setup which is inside the manifold unlike vn s1 setup

 

[Nevyn]

fair enough....I thought it was for the water flow....was going to do the samething meself a while back, but figgered, how often do u need to change the thermostat anyway....and while u have the throttle body off u can give it a good clean

 

[markovr]

http://forums.justcommodores.com.au/vn-vp-holden-commodore-1988-1993/68160-buick-series-1-2-inlet-manifolds.html theres some info here

 

[delcowizzid]

hey markovr did you only drill the hole in the passenger head cause isnt the pcv hole in the drivers side head at the front LOL