Hand porting heads
#22
TECH Junkie
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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.
#25
13 Second Truck Club
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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.
#26
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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.
#28
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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!