how to choose heads?
06-28-2011, 01:48 PM
#21
Second, proper valve size is debateable. There are lots of different opinions on what size a valve should be, and it's typically based off of bore size and displacement. In fact, displacement should always be considered in selecting heads as well as at what RPM range the engine will need to make power/torque.
Your best bet is to just see what has already been done. People love to post dyno result on here, so you should be able to find plenty of results for a variety of different heads/cam combos and focus on those similar to what you're doing. Don't expect to be able to select heads based off of one single variable. It doesn't work well that way. Not valve sizes, not port volume, and certainly not flow numbers.
06-28-2011, 03:07 PM
#22
I say call around, get as much info as you can. And while you are doing that, pay attention to the attitude on the other end. That should go a LONG way in helping you choose their product. Good customer service now = good customer service if you need help later. Having the peace of mind about a company's product is worth a lot to me.
The response Predator posted was a response from AI in a thread I started the other day. TEA also chimed in on that thread as well, and so did TSP. None of them were worried about me having money in hand, which I don't at the exact moment. But soon will......
. Little things like that have helped me narrow down my choices. It ain't just about the glitz. 
