Porting the fast intake...questions
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From: Port Tobacco, MD
Porting the fast intake...questions Well tonight I decided to port the fast. Here's what I did. First I took the fast apart so that the 2 base pieces were still bolted together. I bolted the 2 lower pieces to the cylinder heads and after they were in place I started porting. First I smoothed about 1/2" up and matched the runner to the opening of the cylinder head. Once all 8 runners were matched up on all sides, I used a sanding roll to blend the "port matched" portion up into the runner 2-3 inches. It was starting to get thin in parts but I don't think that they are too thin. What else should I do? Should I bolt the top piece on and smooth everything together? It looks alot better now.
Phil
Phil
I would just re-assemble it and smooth everything together. That's probably as good as you are going to get without being an expert on flow charecteristics and what not.
When I ported mine, the upper portion of the manifold didn't require much of any matching. I did the exact same thing you did. I finished mine off with a fine grit sand paper for a smoother finish. Just make sure everything blends together nicely. On the portions of the runners were you can get your finger behind were you are porting, feel for heat. When it starts to get warm, you want to stop.
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I hear you can get your FAST 90mm "mamofied" for $500. 
A carbide bit is a little overkill for that material. I used a sandpaper roll and removed the ridge from each port and smoothed up all of the transitions where the seperate intake pieces come together. Spent about 1.5 hours to finish.
Originally Posted by blubird
A carbide bit is a little overkill for that material. I used a sandpaper roll and removed the ridge from each port and smoothed up all of the transitions where the seperate intake pieces come together. Spent about 1.5 hours to finish.
Thread Starter
7 Second Club
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From: Port Tobacco, MD
When you bolt the intake down and use a very soft touch with the carbide burr you can match the ports quick and easy. Once the lip is where you need to be take sanding rolls to transition them. Can anyone take a pic down the intake runner of a FAST 90 with good lighting? I can take a pic of one that I ported.
Phil
Phil
