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Old 01-19-2006, 09:31 PM
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Hopping up a Straight Six

Hi,

I have a 25" 1950 dodge straight six. I will be tearing it down and rebuilding. It has 97 horses at the moment, and I've got a few possibilities for increasing this, and I'd like peoples opinions on what to do, and why, and if possible the possible hp and/or performance increase.
I will be splitting the intake and exhaust, but have 2 possibilities on the intake, one with 2 one barrel carbs, and the other with 2 2 barrell progressive carbs. Which should I use? I'll be making sure the head and engine are straight, but would decking be worth it, and by how much? The dual exhaust will be going out the back without crossovers, and smithys. There is also the possibility of a rebore, and a cam grind that I've been thinking about. The engine has 60000 miles on it..... any thing else that anyone can think of?
Of course, this does not include switching engines (especially not a SBC, mopar will stay in mopar), because I want to keep the look of the old engine.... but I don't want to go 500 mph either.... speed is not the issue, just looks, better performance, sound....

Allan
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Old 01-20-2006, 12:46 AM
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Howdy.
Straight sixes are great engines.
Try www.cliffordperformance.com for speed parts. And www.inliners.org for a good tech forum. Post pics if ya can. Hg
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Old 01-20-2006, 07:47 AM
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Hey Allan,nice to see another guy doing up a six,not too common anymore,but real good motors with great potential.
I'm in the final stages of doing a ford 300 six,bored .050,390 flat top pistons.crane valve train,roller rockers,clifford water heated intake with 650 edelbrock,clifford dual headers into dual exhaust,(no crossover),milled head .026,polished ported and gasket matched,all getting topped off with a 150 hp nitrous kit.
Not sure how your carb combo will work but the 650 4 bbl works very good on the 300,quite efficient with power when you need it.
The headers are probably the biggest bang for your buck,don't go over 1.5 inch pipes or you may lose some exhaust velocity as well as scavenging effect,bigger is not always better.
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