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Old 07-29-2017, 10:53 PM   #1
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How Do These Ports look ?

Hi Guys, So I picked up a set of heads for my Stroker Build, and started gathering up the parts for them:
Cam to be something close to a comp cams 260h max .545 lift
PAC 1218 valve springs
Hughes 1382 Spring locators
Hughes 1290 7* reatainers
Comp Cams 516-16 Viton Valve Seals (5/16"X.530) , since the stock ones no longer fit.

But being the tinkering type I couldn't just leave them alone, so after some research (a lot) I took a grinder and some sanding rolls to them. I only paid $100 for the set, so I figured not a big loss if I screw them up. Anyway here is an example of the exhaust port work. Just kind of did a little bowl work, smoothed the guide area, and did a little porting to smooth the transition to the round headers. Just wondering how it looks to some of you that have ported heads.
thank you for your feedback
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File Type: jpg IMG_3674.jpg (36.1 KB, 8 views)
File Type: jpg IMG_3671.jpg (43.6 KB, 10 views)

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Old 07-30-2017, 01:35 AM   #2
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It all helps increase flow a little here and a little there..
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Old 07-30-2017, 04:30 AM   #3
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Old 07-30-2017, 06:18 AM   #4
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Looks go to go!
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Old 07-30-2017, 08:11 AM   #5
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Looks awesome! That's a lot of work, I just did mine a few weeks ago. Did you just do the exhaust side?
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Old 07-30-2017, 11:17 AM   #6
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Quote:
Originally Posted by YeahItsAHemi View Post
Looks awesome! That's a lot of work, I just did mine a few weeks ago. Did you just do the exhaust side?
Yes, so far I have just done the exhaust ports, after reading a few of the articles that have flow tested the heads, most authors/people seem to feel the exhaust port is a little weak compared to the flow of the intake port, around 60%-64% of the intake flow, depending on the valve lift, and a general rule of thumb(their words not mine) is around 70%-75% of intake port flow. I am hoping on taking them to a flow bench in the next week or 2 to see what my numbers come in at.
This stroker build is going to be a daily driver, so I really don't want to lose any bottom end torque just for 10HP at 5,000 RPM.
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Old 07-30-2017, 11:57 AM   #7
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Quote:
Originally Posted by oldmanram View Post
Yes, so far I have just done the exhaust ports, after reading a few of the articles that have flow tested the heads, most authors/people seem to feel the exhaust port is a little weak compared to the flow of the intake port, around 60%-64% of the intake flow, depending on the valve lift, and a general rule of thumb(their words not mine) is around 70%-75% of intake port flow. I am hoping on taking them to a flow bench in the next week or 2 to see what my numbers come in at.
This stroker build is going to be a daily driver, so I really don't want to lose any bottom end torque just for 10HP at 5,000 RPM.
If you get on a bench let us know how they do. After spending 30+ hours on mine with no flow testing, I'd love to compare to get an idea what improvements were made. I didn't remove and material on my ports, just sanded smooth (left it a touch rough on the intake side) and polished on the exhaust side
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Eagle Heads and Intake Manifold-
46RE-CRT Billet Manual Valvebody-Edge 3200 convertor
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Tuned by Charged392
Tons of Pics https://www.flickr.com/photos/[email protected]/albums
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Old 07-30-2017, 01:46 PM   #8
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Quote:
Originally Posted by YeahItsAHemi View Post
If you get on a bench let us know how they do. After spending 30+ hours on mine with no flow testing, I'd love to compare to get an idea what improvements were made. I didn't remove and material on my ports, just sanded smooth (left it a touch rough on the intake side) and polished on the exhaust side
I am thinking the same as you did on the intake side, just clean up the casting flash and call it good, on the exhaust I searched for photo's of what various builders had done, I think stu published some photo's of his porting handiwork, and the CNC ported heads for sale at various sites, and I just kind of followed suit. I left the floor contour the same and mostly worked on the roof of the port , around the guide boss, trimming the sides down and streamlining (boat-tailing) it. Then for the port exit area I wanted to get the shape closer to my round header tubes, but not lose a bunch of velocity or create any turbulance, so I just eased the sides a little rounder than stock, You can see in this photo that the sides are just a little bulged rather than the stock straight vertical lines, and the black sharpie line is a header gasket template, then finished with 80 grit and well, we'll see.
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Old 07-30-2017, 02:13 PM   #9
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What tools are you using? I just used a dremel and a bit set from harbor freight. It took like 3 sets because I burned through so many sanding rolls and grinding stones.
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2003 QCSB "The Mutt"-392 Manley Stroker-Inertia Cam
Eagle Heads and Intake Manifold-
46RE-CRT Billet Manual Valvebody-Edge 3200 convertor
4.56 and Detroit TruTrac-Custom Morimoto Projector Headlights
Tuned by Charged392
Tons of Pics https://www.flickr.com/photos/[email protected]/albums
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Old 07-30-2017, 04:33 PM   #10
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Quote:
Originally Posted by YeahItsAHemi View Post
What tools are you using? I just used a dremel and a bit set from harbor freight. It took like 3 sets because I burned through so many sanding rolls and grinding stones.
I used cheap rasp bits for the rough work, they can chew through aluminum real quickly, be careful they can be hungry, then I used the coarse 60/80 grit sanding rolls and a 3/4" drum sander to get rid of the CHEW marks, then on to smoother 80/100 grit sandpaper rolls to smooth out the finish. The drum sander worked well on the side walls and smoothing out the area just below seats. I have worked with dremels in the past, allways cramped my hands after awhile , and got HOT, so being in construction I went for the tool I use all the time, a tool with some meat on it, A MAKITA 18volt cordless drill !! Hey , I agree it's like hunting mosquitoes with a Bazooka, but it works for me. Here's a pic of my HIGH DOLLAR PORTING SETUP
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