Thread: 327 mods?

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The engine isn't a #s unit, so preserving its originality really isn't a must. There's also a filling station close that sells 110 leaded race fuel. By my calculation, a 4:1 mix with oxy free 91 puts me at 94.8 octane. Not enough lead for the valve seats, but some is better than none. As the roller vs. flat tappet debate, I've heard the pros and cons from both sides. I do run Brad Penn oil, so I know about that part of it. I'm in the information gathering stage for this future endeavor, so nothing is happening to this engine at the moment as it runs like a Swiss watch. Just would like a little more power for the butt dyno and the smile factor.

Originally Posted by 327275

The engine isn't a #s unit, so preserving its originality really isn't a must. There's also a filling station close that sells 110 leaded race fuel. By my calculation, a 4:1 mix with oxy free 91 puts me at 94.8 octane. Not enough lead for the valve seats, but some is better than none. As the roller vs. flat tappet debate, I've heard the pros and cons from both sides. I do run Brad Penn oil, so I know about that part of it. I'm in the information gathering stage for this future endeavor, so nothing is happening to this engine at the moment as it runs like a Swiss watch. Just would like a little more power for the butt dyno and the smile factor.

Using leaded fuel on the street is AGAINST THE LAW.

The most important part of camshaft timing is the intake closing point. You must coordinate that point with the static compression ratio of the motor in order to get the correct amount of mixture trapped in the cylinder to make the proper bang when the plug fires. Too much mixture trapped and you can have detonation. Too little mixture trapped and you have a pooch. So, it's a fool's errand to try to choose a cam without knowing the exact static compression ratio of the motor. If you'll pop a head off to see that the piston crown configuration and the piston deck height are, we could have a better chance of helping you to determine the correct camshaft profile by mathematically figuring the static compression ratio. As far as intake manifold, go on craigslist and try to find a Weiand 8016 Stealth or Holley 300-36 Street Dominator used. Go to local swap meets and find a 650 carburetor and rebuild it. That's all the carburetor that this motor will need.

You need to spend a little more money to get a good set of long tube headers. Buy units with at least a 3/8" flange thickness. Less thickness than that can curl up like a potato chip under the heat of operation and spit the gaskets out. You will always be fidding with them to prevent leaks.

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