The machine shop that is working on the head says they can't put bigger valves in it. What p/n for the valves and cam?Maybe if I brought it to them they could do it.Thanks
OK no big valves. Don't want to brakie anything.CrazyAndy I am going to run the cooler to the front of the truck. It's a long way but it works I hear.The cooler mounts where the oil filter housing is. The oil filter then screws onto the cooler and hoses run to the radiator infront of the car.Here is an example.http://www.summitracing.com/parts/FLX-3953/?rtype=10
Quote from: TonyTDTruck on February 27, 2012, 11:14:53 amOK no big valves. Don't want to brakie anything.CrazyAndy I am going to run the cooler to the front of the truck. It's a long way but it works I hear.The cooler mounts where the oil filter housing is. The oil filter then screws onto the cooler and hoses run to the radiator infront of the car.Here is an example.http://www.summitracing.com/parts/FLX-3953/?rtype=10he breaks things because he has a compound turbo'd 300hp AAZ variant..
Quote from: R.O.R-2.0 on February 27, 2012, 11:55:03 amQuote from: TonyTDTruck on February 27, 2012, 11:14:53 amOK no big valves. Don't want to brakie anything.CrazyAndy I am going to run the cooler to the front of the truck. It's a long way but it works I hear.The cooler mounts where the oil filter housing is. The oil filter then screws onto the cooler and hoses run to the radiator infront of the car.Here is an example.http://www.summitracing.com/parts/FLX-3953/?rtype=10he breaks things because he has a compound turbo'd 300hp AAZ variant..thats kind of my thought there are alot of changes to that engine to blame valves for any failures not specifically related to valves. but there is definitely a point where the port design becomes the restriction and not the valve as well as a point where is no point in going any bigger haha.yes tdi has different stem length, and later aaz's actually had 7mm valve stems so they are easily available. for gas engines some companies have 7mm valves that are cut down to 6-6.5mm just above the head of the valve. i think they even make oval stems?
what im getting at, is you dont NEED big valves unless you are striving for those insane power levels.. stock valves are good for 250hp or so..
The 6k rpm limit is a limit given by the VE pump, an inline pump happily revs higher, just look at what the MB IDI builds are capable of.
Thanks for all the help. From the looks of things I can stay with the stock valves. The fuel pump is being set for max 20psi . I'm not planning on racing this truck just hoping for a bit more power. Porting the head sounds like it would improve on things, but a cam should help with the flow. Where can I find this cam? Anybody have a p/n or store? I've installed cams on gasoline engines from mild to racing cams but never a diesel. Nobody I've checked with knows of a cam for this AAZ.Thanks