mrtim astra head

[Anonymous]

does the si head have bigger valves as standerd or was the head u put on modifeyd befor u fitted it?

[Anonymous]

Bigger valves as standard m8.
I was told to get a multipoint injection head cos they had bigger ones than the nornal single point.Has to be off an si or gls.Corsa sri ,i think does it as well.
I didnt know if it would work or not cos the guy who told me to do it hadnt done the swop before but it all worked a treat. The valves are much much bigger, and the chambers dont have that swirl thing either, there just straight thru. As far as putting on the 1300sr inlet manifold i dont know about it.I ground away the inlet passages to fit the manifold, and although i wasnt particularly happy doin it at the time it all worked. If ur gonna do it get the head skimmed and then port it and grind all the valves urself. My mate has done it before so we knew how to do it but its not that big a job.
Give us a shout if u need nething else.