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| How hard is it to port heads? https://www.slantsix.org/forum/viewtopic.php?t=10571 |
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| Author: | Speed Dragon [ Tue Oct 05, 2004 11:02 am ] |
| Post subject: | How hard is it to port heads? |
Is it something i can do w/ some advice from the gurus? My main question is how do you know how much to grind? i'm pretty sure i can do it myself, i'm very mechanically inclined (after all i am a mechanic  ) and it seems like all it is is grinding the right amount in a certain spot.
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| Author: | Doctor Dodge [ Tue Oct 05, 2004 7:20 pm ] |
| Post subject: | |
Porting a SL6 head is not that hard, it just take a lot of time. Take the head apart and get it cleaned and inspected for cracks, don't wast your time on a poor quality head. The most important areas are right under the valve seats, you will see a lot of extra metal to the inside of the valve seat, this extra metal can be removed. Grind straight down, do not undercut under the valve seat. This pic. gives a general idea. DD 
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| Author: | Slant6Ram [ Wed Oct 06, 2004 5:55 am ] |
| Post subject: | Also |
This isn't a one hour project unforturately, so you don't want to practice on your one and only ride home. I suggest you find the oldest junkest head around, with all the valves burnt and every broken stud possible. Remove a few valves to give yourself room to work. Now cut till it hurts, push the limits. Think of air as a liquid, and look at the port as a river. Any bumps or curves will slow things down, and the more volume that can flow, the better. I suggest, you do one intake and one exhaust on the junk head. It takes LOTS of time, but I think the experience was worth the effort, and I can now see why it's so expensive. There are several recent posts (in the last couple months) about porting. Read and look at pictures to get ideas. If you have a question, a picture can be worth a thousand words. The professional porters will tell you that you can hurt flow if you don't have proper testing equipment and experience, but I can't imagine how it could get any worse than a stock slant six head. |
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