ferrea valve question

[fear_me]

Hi all, i just have a simple question about these valves.

I see on there website that they make a 1mm oversize valves for the turbo motor.

has anyone tried these yet? and do you think it would be worth the money?

 

http://www.ferrea.com/sportcomp05.html

 

thanks all

~Andrew

[speeder]

I used Ferreas in my 3.0l Turbo L6 and they have worked well. My Machinist says they are among the best valves made.

 

My intakes on the P90 are stock size and the exhasts are +1mm. I had to special order the "extreme duty" valves- Don't remember any part numbers, however....

 

Unless you have serious head work (and probably eybrowing the block to unshroud the larger intake valve) , a larger intake will not give you any benefit and may in fact hurt performance. There are gains to be made from the larger exhaust in a stockish head, however.

[fear_me]

thanks for the info, so you are saying stay with stock size on the intake, maybe the +1mm on the exhaust. But really i should have the head P&P before i worry about larger valves?

 

~Andrew

[jeffp]

Hi there, I have had two heads done for my car. Robello racing did the first head and Gerolomy did the second head. Both heads were completed and machined very well. I spent more money on the Gerolomy head, and I went with Ferra stainless steel valves, so there were some differances in the two parts.

I will say though, for the money give Robello a call and get a quote from them. Dave has made some Excellent design changes in the head that gets the flow numbers the same, and in some cases higher then a head with the bigger exhaust valve believe it or not.

I have gotten nothing but excellent quality from both head builders, but Robello is cheaper.