port and polished head
Maybe Map can explain why? I would guess that the porting is very radical to where everything is opened up to the point of needing a lerger valve seat....??? Maybe they can chime in.
naa they dont have to chime in as it stands there are several good companies that do great head work as well
The difference in headwork between all of the companies just mentioned is probably like splitting hairs and we'll never know. You can't go wrong with any of them. They're all excellent!!!! 
Last edited by ChrisCarey; Jan 7, 2011 at 03:43 PM.
Awesome to hear sir, I'm sure the final product will exceed your expectations
My understanding (Bob would be best suited to chime in here, I'll see if he's available) is that +1mm valves are only recommended when the accompanying portwork has been performed, like that of our stage 5 cylinder head. We don't require that people go +1mm (I'll add an option on the website for stock size) we simply recommend it as it works pretty well on our 1053whp Evo 8
My understanding (Bob would be best suited to chime in here, I'll see if he's available) is that +1mm valves are only recommended when the accompanying portwork has been performed, like that of our stage 5 cylinder head. We don't require that people go +1mm (I'll add an option on the website for stock size) we simply recommend it as it works pretty well on our 1053whp Evo 8
Cheaper doesn't say lot and porting isnt a standard process--you port for power and power band. Like everything else if you go too big you lose torque and lose drivability in lower and midrange rpms. Then you have this great car that is a dog off the line and a sleeper to 5k where it wakes up for 3k and you drive that on the street. Been there and while it sound fun it isn't. You need to take the time and find out where your turbo kicks in, where your cams come on and what the power band of your car is and then decide what kind of changes you want to make via a port job. Trying to ask if one job is better then someone eles without undertsanding the implications is insane, unless you are going for that 1000hp EVO. Think about this, how about port matching everything to 2" inside the head and compare that to a full race port. Not the same thing, cost is very different and power range is different again, yet they are both considered a ported head.
[/Quote] Chris Carey My understanding (Bob would be best suited to chime in here, I'll see if he's available) is that +1mm valves are only recommended when the accompanying portwork has been performed, like that of our stage 5 cylinder head. We don't require that people go +1mm (I'll add an option on the website for stock size) we simply recommend it as it works pretty well on our 1053whp Evo 8 [/QUOTE]
Here's a quote from your website in reference to the Stage 5 Cylinder Head Porting:
"NOTE +1MM VALVES AND AFTER MARKET VALVE GUIDES REQUIRED FOR THIS STAGE HEAD"
Sorry, but I assumed that "REQUIRED" meant it was mandatory.
Either way, for you to even mention it, I'm going to make it mandatory on my build. +1mm valves will be installed in my cylinder head!!!
[/QUOTE]Here's a quote from your website in reference to the Stage 5 Cylinder Head Porting:
"NOTE +1MM VALVES AND AFTER MARKET VALVE GUIDES REQUIRED FOR THIS STAGE HEAD"
Sorry, but I assumed that "REQUIRED" meant it was mandatory.
Either way, for you to even mention it, I'm going to make it mandatory on my build. +1mm valves will be installed in my cylinder head!!!
Chris Carey My understanding (Bob would be best suited to chime in here, I'll see if he's available) is that +1mm valves are only recommended when the accompanying portwork has been performed, like that of our stage 5 cylinder head. We don't require that people go +1mm (I'll add an option on the website for stock size) we simply recommend it as it works pretty well on our 1053whp Evo 8 [/QUOTE]
Here's a quote from your website in reference to the Stage 5 Cylinder Head Porting:
"NOTE +1MM VALVES AND AFTER MARKET VALVE GUIDES REQUIRED FOR THIS STAGE HEAD"
Sorry, but I assumed that "REQUIRED" meant it was mandatory.
Either way, for you to even mention it, I'm going to make it mandatory on my build. +1mm valves will be installed in my cylinder head!!![/QUOTE]
Good i know i have +1mm over lol
[/QUOTE]Here's a quote from your website in reference to the Stage 5 Cylinder Head Porting:
"NOTE +1MM VALVES AND AFTER MARKET VALVE GUIDES REQUIRED FOR THIS STAGE HEAD"
Sorry, but I assumed that "REQUIRED" meant it was mandatory.
Either way, for you to even mention it, I'm going to make it mandatory on my build. +1mm valves will be installed in my cylinder head!!!
[/QUOTE]Good i know i have +1mm over lol
i just looked into it and your right it looks like AMS is doin there own port work now. im still 99.99% sure they use to send them to dave. i guess that must of been a few years ago? OR i just got some BS info
Hmm, a good read here but after talking with folks that have gone far faster then I have a lot have said that a ported head is not required for 99% of the cars out there. I would talk to the vendors that actually port the heads and tell them what your goals are. I'm sure they will advise you on if your car needs this or if your hard earned money could be spent on different mods that will benefit your car and help you achieve your goals easier.
Hmm, a good read here but after talking with folks that have gone far faster then I have a lot have said that a ported head is not required for 99% of the cars out there. I would talk to the vendors that actually port the heads and tell them what your goals are. I'm sure they will advise you on if your car needs this or if your hard earned money could be spent on different mods that will benefit your car and help you achieve your goals easier.