Austarion

Interesting, but guess its only worth it if you are trying to wring out as much HP as possible. For most people turning up the boost is probably easier :P

Agreed but for me it was all about improving the efficiency of the 4 v heads .If one reads the article they recessed the seat of one valve and had different inlet valves and ported it accordingly along with the exhaust side to get a better flowing head to produce more power at the same boost.
On my racing budget I will just turn up the boost another 5 psi

I think the point was not for outright power but to improve the driveability of small capacity 4 cylinder engines as Rad said. The fact that your race engine will also benefit from the changes is a byproduct.

yeah there's not enough focus on efficiency in the aftermarket.. people are too busy chasing power and being cheap about it lol

thrash wrote:yeah there's not enough focus on efficiency in the aftermarket.. people are too busy chasing power and being cheap about it lol

You calling me cheap :glare: :glare:

rofl

no, i'm saying that your priority is power and reliability, not efficiency

thrash wrote:rofl

no, i'm saying that your priority is power and reliability, not efficiency

Thrash sorry mate It's all done in good fun. I just can't help myself at times.Was just winding you up :D

lol, no apologies needed, i know you were just having a go

Must be great to have access and time to do all that sort of stuff.

I always hoped variable compression ratio engines would get developed. I think the closet/best solution was one done by Saab.

Needs an independent review; The author is writing about his own patent,
on his own website.

I suspect there isn't much gain over conventional setups.