Hand porting heads
01-31-2014, 10:37 AM
#22
Here is the link to the YT porting. Pt#1.
Shortly, I will be doing the same.
I had previously completed the bowls & chambers, in addition to smoothing the runners.
Even a mild port behind the valves will be effective.
If you smooth the combustion chambers, compression will be reduced, slightly.
Shortly, I will be doing the same.
I had previously completed the bowls & chambers, in addition to smoothing the runners.
Even a mild port behind the valves will be effective.
If you smooth the combustion chambers, compression will be reduced, slightly.
02-06-2014, 06:19 AM
#25
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I lightly hand ported a set of 799s last month. Mostly worked on the bowls seat area rocker hump and valve guide areas. It was my first time porting and even with a stock vj the heads picked up 10 to 12 cfm on the intake and exhaust side.
02-06-2014, 04:40 PM
#26
Damn dude! I can only hope to get mine looking half that good. lol It is actually going alright. I have them roughed out, just waiting on some finishing material for the exhaust side. Still roughing out the intakes with my carbide burrs before finishing it off with 80 grit.
02-17-2014, 07:39 PM
#28
Well I had my heads flow tested. It went really well, surprisingly! I kept it safe and didn't get super aggressive with them. Turns out they are flowing:
.500 Intake 287cfm, exhaust 201cfm
.600 Intake 298cfm, exhaust 210cfm
I forgot to take the damn sheet home with me, so I don't have the exact numbers down to the decimal.
One thing the machinist suggested, was taking more out of the bottom of the intake floor. When I did this the numbers went way up above .500 lift. before that they were nose diving a lot when approaching .600. Hopefully I'll see some good rwhp numbers as a result. Thanks to all who helped!
.500 Intake 287cfm, exhaust 201cfm
.600 Intake 298cfm, exhaust 210cfm
I forgot to take the damn sheet home with me, so I don't have the exact numbers down to the decimal.
One thing the machinist suggested, was taking more out of the bottom of the intake floor. When I did this the numbers went way up above .500 lift. before that they were nose diving a lot when approaching .600. Hopefully I'll see some good rwhp numbers as a result. Thanks to all who helped!