01-10-2018, 12:20 PM
I removed the manifold, ground out the "restriction", and replaced it.
No improvement at all.
But: there may be other factors affecting the result, I'm afraid. I subsequently found that the engine is fitted with particularly wicked oil control rings, such that there is quite a lot of resistance to up and down movement of the pistons.
Which may have masked any change made by opening out the manifold. Which may also be the reason that my raised compression early head made not a lot of difference, either.
Simon
No improvement at all.
But: there may be other factors affecting the result, I'm afraid. I subsequently found that the engine is fitted with particularly wicked oil control rings, such that there is quite a lot of resistance to up and down movement of the pistons.
Which may have masked any change made by opening out the manifold. Which may also be the reason that my raised compression early head made not a lot of difference, either.
Simon