Please keep going Jeff and ignore the discouraging words. Besides, I'll bet the factory castings dont flow 100% the same to each cylinder on ANY GM car. I have just been keeping it simple with them so far, but im sure that i will be smoothing them out quite a bit more sooner or later. Heres a shot of one of the intake bowls that I did today. This is the exhaust side that is not completed yet, look at the top part of the ports and compare to the next picture. Just a few pictures of where the heads are at so far. Without further ado, heres some pictures. The other head has everything but the short side of the radi ported on the exhaust side (not polished at all either) and the bowls on the intake ports on that side also done. So as it sits, one of the heads has all 3 of the exhaust ports completely ported (not polished yet) and the bowls on the intake side are finished as well. Oh well! Instead of finishing them up I did the last 6 intake bowls. They are almost done though, I just have to complete the short side of the radi, which is not the easiest part in any way what-so-ever. I wanted to get the other exhaust ports finished but I lost interest in the exhaust side before finishing them completely, so I guess that we'll just have to wait on that.
STANDARD ABRASIVES DELUXE PORTING KIT UPDATE
If someone wants them flow tested, send me the money and I'll do it, but otherwise im not going to unless i can get it done for dirt cheap or free by the machine shop that I go through to get the valve job and head resurfacing done.Īllrighty, since it seems that there is sufficient interest, i'll continue to update the thread, starting with this post. Read Dave Gunsuls post above, that is really what this thread is about. I am considering not updating this thread anymore, it seems that the most that I get out of it is negative feedback.
If anyone wants to dispute that its fine, but do it after reading their article with thier results. What they had to say about it was that you should keep it to 80 grit and no higher to keep the fuel atomization at the best. Also, I have done some more research on the porting last night and after reviewing a porting article ( ) again I am going to go ahead and port out the intake side as per thier advice. I feel that the overall improvements that im making elsewhere and the increased compression when i get the heads resurfaced should make up for some of it. But that isnt a concern for me because i really REALLY want more top end. Maybe it wont work, and I honestly really do believe that I'll loose quite a bit of low end with what im doing to the exhaust side because the velocity of the gasses is going to be significantly less, so unless there is more air flowing (ala higher rpms) I think I might loose.
im trying to do one thing at a time to each port on each head with one example port to go off of on the exhaust since it was such a radical change. As for the flow matching, well that is why im doing everything with the pocess that I am.
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