I'm over here in the States where the Astra just became available for 2008 and it has been a poor seller. So we will likely get very limited aftermarket support.
Mine has a 1.8L, 138 hp, iron block, 16 valve head w/ VVT, NA motor. I assume this motor has been available for some time in Europe?
I'd really like some help in getting some modest hp increases. Somewhere around 160 hp would make me very happy. Is there a basic formula for achieving these hp #'s on this motor? I'd like to avoid the expense and complication of going w/ a turbo.
Can someone point me in the right direction?
Thanks so much for your help!