Evo head porting pictures
May 18, 2004, 02:58 PM
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Ported Evo 8 head pics
Well, I tried this last night, but for some reason no one could guess what the picture was of, and to top it off, someone moved the post to the "Off Topic" section of the board. So , I will make one more attempt at it, here it is, plain as vanilla......
Last edited by darkhorse; May 18, 2004 at 03:55 PM.
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May 18, 2004, 04:46 PM
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No before dyno sheet, but if the car gets dynoed after wards, then it will probably get posted. ANyhow, it would have little bearing, since there is a few more modifications being done to the car. As far as flow specs, can there be? Sure, will there be? No, unless the customer wants to have it flow benched, which is of little consequence anyhow since I put little value into those numbers.
I would rather see the gains in times, not charted numbers,alot of people are busy racing dynoes and flowbenches, I will be satisfied when I see it running and put down some good numbers then.
I would rather see the gains in times, not charted numbers,alot of people are busy racing dynoes and flowbenches, I will be satisfied when I see it running and put down some good numbers then.
May 18, 2004, 08:33 PM
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well i have a few questions.
first, those pics arent the greatest, but those appear to be untouches seats.
why would you port before doing the seats, you should do seat then blend the bowl into the seat.
second. agian hard to tell but the intake valves look very shrouded, and theres alot of sharp edges there. alittle deshrouded might work wonders. is there any chamber work done?
3rd i notice not much attention was paid to the short turn radius. is this because of the valve angle of the head or maybe the tulip of the stock valves?
lastly a flow bench is a very useful tool. not so much for airflow numbers but for mixture purposes, a good head builder will wet flow the head but add dye to see how the air and fuel will be mixed (atomized) this has a great deal of effect on peroformance. there is no way u can just know how to port a head to promote good mixture, if you can ur the head porting GOD. i mean what kinda turbulance does the evo head produce, is it a tumble port head, swirl port head????
the very first shop i ever worked at was a head building shop, i was an apprentice, i learned alot, and know alittle about head work.
dont get em wrong, not trying to call u out, just curious. i have never worked with or seen one of these heads off the car.
first, those pics arent the greatest, but those appear to be untouches seats.
why would you port before doing the seats, you should do seat then blend the bowl into the seat.
second. agian hard to tell but the intake valves look very shrouded, and theres alot of sharp edges there. alittle deshrouded might work wonders. is there any chamber work done?
3rd i notice not much attention was paid to the short turn radius. is this because of the valve angle of the head or maybe the tulip of the stock valves?
lastly a flow bench is a very useful tool. not so much for airflow numbers but for mixture purposes, a good head builder will wet flow the head but add dye to see how the air and fuel will be mixed (atomized) this has a great deal of effect on peroformance. there is no way u can just know how to port a head to promote good mixture, if you can ur the head porting GOD. i mean what kinda turbulance does the evo head produce, is it a tumble port head, swirl port head????
the very first shop i ever worked at was a head building shop, i was an apprentice, i learned alot, and know alittle about head work.
dont get em wrong, not trying to call u out, just curious. i have never worked with or seen one of these heads off the car.
Last edited by projekzero; May 18, 2004 at 08:43 PM.
