|
|
| Re: Remake of the Crosslow, pushrod a-series "ay12" 11041-M0820 head |
Subject: Re: Remake of the Crosslow, pushrod a-series "ay12" 11041-M0820 head
by matbighat on 2007/6/8 22:23:10
ok, i just got back from lunch with my nissan tuning guru, and this is what he had to say re: project ay head:
the twin plug wires, he suggests are due to the inefficient plug location on the exhaust side of the head
recall if you will the z18, 20, 24 with the same problem, remedied by twin plugs
whereas on the toyota 2t heads, the spark plug is centered
in the ay black & white pics we've seen of the underside show only one plug electrode, so perhaps the extra plug was retrofitted due to insufficient detonation and is just not shown in the homologation pic
as far as modeling the head, aside from slicing the donor ay head up, the only good way to do that is via cad/cam model
at that point, and if this wasn't about homologation rules, you'd want to employ the services of a cylinder head designer to build a better head since you're starting from scratch
in other words, this ay replica will inherit the original ay's deficits
if the objective is not to make the best head, but what's allowed by a racing organization, it's certainly worth pursuing
i'm still interested, but only as an observer
unless some new revelation changes my mind, the only thing that would make me consider changing my gx head is if somebody got the ga16de head to work on a a-series block
|
|
