Anyone have stock evo flow number's ?

 

Please give more information so people can help you. I have no clue what you are asking.

 

Yea u talking about CFMS? or what?

 

Yes Cfm I have flow tested and port mapped a set with are bench I/E ratio's made me laugh I just want to confirm other's are getting the same numbers...Stock for stock Car is a 03 evo 8

 

care to share the numbers you got? Could explain why a lot of people are going staggered on their cams.

 

Flow numbers I can tell you a little about what I got the port map and graphs I have to keep on my cpu...Flow bench is custom using audie proflow cpu program @ 28" Whave yet to test he head using are tumble or wetflow systems as this is the first Evo head I have had my hands on.. As you can see in the graph the Exh. outflows the intake threw the whole lift range.. This is what I was concerned about maybe thinking my bench was off...

 

wow, that's really interesting! Counterintuitive to what I would have thought. Most put the bigger cam on the exhaust side, which points to the turbo as being very limiting to flow. Also, look how it really flattens out at .3" lift and beyond. Says the high lift cams won't get you anything, which goes against some dyno results here. This it going to generate a lot of debate. Thanks for sharing!

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The air speed on the intake is pretty even from the floor to the roof of the port on the intake Side.. The port tapers down quite a bit.. Even the air speed falls off @ .350. As for the Exhaust side the port speed is a little lower then id like to see for a turbo charged engine I think this head could really benifit from welding the port floor and widening the port helping bring up the velocity and flow..

 

nice info

 

Again I would like to confirm my reading's are close to what others are getting..If not I have to go threw and check my bench..

 

No info on this ? A started working the head starting to look good...


Dave

 

What Type of Flow bench was used.

Was the Exhaust tested through a pipe? what size bore was used on the intake, was it radiused with clay, how many in/hg were you testing with.

these are all things you have to tell us so we can be more usefull. we can set a standard

i've personally seen a flow bench operator flow a head correclt and it flowed 312 cfm @.650 lift on a 3.9" bore, he then upped it to a 4.0" bore used a few trade secrets and got the numbet up over 340cfm @ .650 lift.

 

AFAIK, there have been no dyno results that isolate the difference as being only lift between two different cam sets. The recent comparison regarding the Revolver cams was seriously flawed in that regard and certainly did not prove anything with respect to valve lift.

Nevertheless, I find it interesting that the flow data presented here demonstrates no improvement in flow beyond ~9mm of lift. I'd like to see flow data from another source just for the sake of comparison.

 

Bore size was 89.26mm that was the closet thing I had to a stock heads head gasket. As I said before flow bench is a customs unit able to flow well over 1000+cfm @ 70 " of h20. We use Audie proflow opererating system... We also have Wet, Swirl and a prototype Tumble meter... Intake radius was clay I did'nt have time to mill out a entry plate.. There was no pipe used on the exhaust side.. Trade secret ? when upping the size of the bore ussually alway ups the flow by not shrouding valves.. I hope Mr. Buschur can chime in here he seems to have alot of knowledge on these thing I have alot of respect for everything he is doing and has done for these engine and this market, this is his market I am not tryig to spam I am just doing this for a friend..So any help would be greatly apreciated.. I belive we both did a article in the same Mag and same month in Drag sport issue 006 He did a aricle on Engine and we did a article on thermal coatings.

 

Also remeber this is a 4v engine not a 2v bbc engine High lift is not really what make these thing work it is the duration,Ramp rates ect.. Just cause the lift cnge doent mean everything else stays the same.. But I am sure Most of you know his thanks again for all the feed bak and response.. I have plenty more data if anyone else nees to kow anything ..