OKAY so here is a biggy im hoping you all can answer it..

if i take my slant six from 1974 (225) and convert it to a super six, how many more ponies can i squeeze out of it?

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74 plymouth duster, 225 single barrel slant six

10

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Joshua

There are entirely too many variables to just throw out a HP number.

,Cliff

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'72 4 dr Dart
'63 4 dr Dart

well places i see 20, he just said 10... i mean, >.> a rough guestimate... a between... so right now i see a 10-20...

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74 plymouth duster, 225 single barrel slant six

Hard to say,

If you follow this:

http://www.slantsix.org/articles/supersix/article.htm

I'd think around 160HP, depending how good your engine was at the start, or if it's had any head work etc.

Try looking at the HyperPak setup.
http://www.allpar.com/mopar/hyper-pak.html
Advertises the engine to be 190HP with the hyper pak.

I think if you got some decent head work done you'd notice a big increase in power. Head shave, port polish etc.

alright i will have to price that out.... i got a lot of friends who do that kind of thing, but thanks for the round about number.

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74 plymouth duster, 225 single barrel slant six

I threw out 10 just because. It might be 0, it might be 20. Depends upon how good the old carb is and how good the new one is relative to each other. n any case I wouldn't spend money on a carb and intake until I was sure the engine was in good condition and that the ignition system and advance curve were optimized. I'd probably also do 2 1/4" exhaust before a 2bbl carb. I would also suggest raising the compression ratio, bigger valves and head porting. All that being said my '74 Duster did gain a lot of power with a 350 CFM Holley 2bbl on a Super Six intake with no other mods.

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Joshua

well the carb now is crap... is 2 steps from being worthless... this lovely car likes to cruise at 60... it will go faster but it takes a bit to do so... (i think 70 is its max*

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74 plymouth duster, 225 single barrel slant six

@Joshua Skinner - do you know roughly where the HP for your engine sits from that change? I am going through the same thing now.