So... we have been wanting to do some kind of tech article for our Evo M family, but thought it would nice to ask what you guys would be interested in seeing instead of just throwing something out there...

First priority is keeping it simple so it leaves a little bit for everyone..let's bounce some ideas here!

 

an explaination of different features, options offered when getting your head serviced. pros and cons.

pretty much the science behind the numbers

 

flow #'s for the different services offered would be great!

 

i agree with pros and cons of all different options with heads, and bang for the buck of the different options also.

 

agreed there. Headgames can we get the economy buster head deal angular ported upgraded valvetrain and single springs for like 1500(user provides core). the economy saver package LOL

 

ok..I like these ideas!

We honestly just wanted to do something that will not only show case our work, but would make a smarter consumer. Benefit everyone.

Flow numbers are nice, but few have any clue what they are actually reading. the .500 number is what most would instantly seek out and it's not really telling of a good cylinder head. Area under the curve is what we are trying to achieve here.

As far as a budget head, we could work on something like that. I really like that idea

 

or a flow % difference between the stages so we can weigh price vs. gains.

 

My only input is to get Tiffany to do some port work in a 2-piece

Makes me remember this thread - https://www.evolutionm.net/forums/ve...-shipping.html

 

Nice you like my ideal and im being dead serious. i know of a couple people that would hop on that vs paying 1800+ etc. if i could port heads and had all the machines and your brain as a secondary source i would do it for like a limited time run see how it turns out it cant hurt only help business

 

I'd really like to know when going to oversized valves is optimal. When turbulence turns to higher velocity and such. Maybe why smoothing the bowl does so much. Hopefully i am even using the correct lingo.

 

when high lift cams are useless in stock heads? when valves flow more then the ports, etc.

 

hello,
are you able to do a description/explanation of multi angle valve seats with advantages/disadvantages with cost vs benefit?

I see you talk about area under the curve. With porting and oversize valves, you are getting higher flow rates at lower valve lift. What effects does this have on low HP (read 300-400whp) cars, with respect to power losses/gains and intake velocities?

Camshaft selection with a ported and/or unported head? Does a ported head actually "change" the duration of a camshaft as 0.050" flow numbers are different etc?

just some ideas!

I think it's awesome that a company actually wants comsumer input and is willing to deliver!

Cheers, Mike

 

I think this is a good idea. The budget builds and stages is another great idea. Not everyone needs a full blown head with over sized valves etc and with more options at different price levels with explanation of what and why would be great!!

I can't wait to get my head back from you Dave. The day it comes in it will be getting thrown back on the car and the testing shall begin!! I'm expecting good things and im sure i shall receive!! My experience with you so far has been top notch

Adam Blevins

 

Just some topics that interest me.


Tulip valves vs. nail head and the difference in throat to valve face size needed for each?

How to generate tumble in the charge to induce uniform fuel mixing?

Benefits and downfalls of flat faced valves?

Sodium filled and hollow stem valve benefits?

Valvetrain dynamic motion and how valve height effects follower geometry?

Volume vs velocity in the blow-down phase?

Porting to prevent reversion?

 

well..we actually don't offer stages, if we did, everyone would want the biggest baddest one. We try our hardest to sell what you need, not what you might think you want. It's really hard to convince some of you that the oversize valve is just not needed. So we could show the differences of a ported head with stock size valve VS the oversize valve. we would be limited to the flow bench however...
But from our experience, and it's not limited to the 4G but almost every head we work on, will work very well up to 900-1000whp on a stock size valve. The restriction is in the valve job, not the valve in our opinion. Which brings us to this post:


[QUOTE=RSMike;8172474]hello,
are you able to do a description/explanation of multi angle valve seats with advantages/disadvantages with cost vs benefit?

I can not count how many potential customers call and ask how many angles we use on the valve job, but valve jobs no matter how many angles are not created equal. We have a 4 angle valve job that absolutely destroys our 5 angle. I like this one...and actually have a head from a CNC'd head from popular shop that might fit this comparison very well. Just have to figure out how to show it, without showing the valve job we use. Somethings have to be a secret.

Basically, it would be, what is a valve job worth? Not just in dollars and cents