I think I get the point with the manifold now. I'd never looked into this prior.
I just read this article concerning wet/dry manifolds. Bit basic but that's sometimes the best way to learn
http://www.kennebell.net/techinfo/gm-tech/manifold-injection.pdf
Actually, this article made more sense:
http://en.wikipedia.org/wiki/Nitrous
edit:
spoke with LPG gut this morning, he doesn't think the manifold has anything much to do with prob @ this stage. It is the fact LPG delivery is via only 1 convertor (vaporiser). It would have leaned out by not enough fuel. He has had success with mixers & says the mixing is all done within mixer ahead of throttle body so, it can't unmix, so to speak once in the inlet manifold.
If he adds a 2nd convertor it should have plenty for 400rwhp. This is what I am chasing. The car will only be pushed hard occassionly but, due to all the bleedin' money/timer & bottom end parts used, it'd wanna make good figures for me to accept all this fun (not)
I am taking engine to my builder also today.
Cheers again guys!
