D16A6
D16Z6
B15's
An average of 7-21 days is spent on each head. Porting is generally done in three different stages depending on what the given project requires. I only build Naturally Aspirated Honda/Acura/VW engines and nothing else, so therefore these heads you can assume are prepared to achieve this one and only objective/goal in maximizing Naturally Aspirated performance.
Every Cylinder Head is built around the specific motor it's being designed to run on. Every Cylinder Head is balanced around the given Camshaft specs to be used upon completion of our given Cylinder Head. By doing this, many would think that you are making a custom stage head ( Meaning another type of port design from the three different said to be an option ). What the three different stages of headwork basically mean are how streetable one would want the Cylinder Head status to be. The following shows a more detailed list of these options:
* Stage I = Conservative Porting. The safer route is always taken over the potential extra hp gain when the decision/question arises as an issue. The objective is to get as much free horsepower out of the Cylinder Head as possible while maintaining roughly the stock demensions.
* Stage II = Fairly race for a street head. Although, it's more than what you may be asking for, the common sense is still taken into consideration that the motor is to be used on a regular basis. The reason for the extra work is explained in the objective. And the objective is to increase as much power possible out of the given Cylinder Head without limiting it's streetability unreasonably. The attitude here is if this is too much then might as well run a Stage I settup to assure mildness since highest hp gains are not as much of a concern as the reliabilty factor to the given motor.
* Stage III = I hope you gave it alot of though before deciding to run something like this becuase at best, this head can be settup to operate on the streets for a limited amount at a time. This head is hardly for street use. But in theory, IF it were to be used on the street, It would need consistant breaks cooling down. This head runs hot and it's only objective is to maximize horsepower (naturally aspirated) at nearly any cost to the motor.