Great awful commute fuel economy

[Baltothewolf]

Originally Posted by California98Civic

Yes to all of this. I was a little disappointed at the machinist didn't seem to do a check for warpage before flattening. But he did a great job. I'd recommend them to anyone. But you asking these questions reminded me that there's still another modification that I forgot to mention in the original post for this thread. I set the valve lash in a way that was meant to improve internal EGR. The valve lash is still all set within specs but the exhaust valves are open for as little as possible within spec and the intake valves are open for as long as possible within spec.

Be careful with that. The ex valves not being open long enough can significantly raise EGT's and cylinder tempuratures. I'm sure it's fine, I would just be conscious of it.

[California98Civic]

Originally Posted by Baltothewolf

Be careful with that. The ex valves not being open long enough can significantly raise EGT's and cylinder tempuratures. I'm sure it's fine, I would just be conscious of it.

Yes, and there should be more heat transfer to the head as a result of longer duration of exhaust valve contact with the valve seat. But I kept it all ridiculously conservative by staying within specs and just pushing to the opposite ends of the limits. The idea is better emissions and FE because of a more complete burn and higher manifold air pressure. There is an article I linked in my mod thread (link below) if you wanna see more.