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Discussion Starter · #1 · (Edited)
I was just wondering what some good ideas are to rebuild my 403 engine. Also any great websites would be VERY helpful. I was also wondering about supercharging it and if it would fit under the shaker hood??? I also wanted to put the Edelbrock 7111 performer manifold on my engine so I could get some nicer heads for it and was wondering if the high rise on the manifold is too much to fit under the shaker hood or if I could do some mods to get it to fit. Just so everyone has an Idea I want to keep the body and hood original but I want to be able to put out the most HP possible and I would love some recipes for the engine and the easiest and MOST reliable route would be to go and where I could get the parts. I appreciate it very much thanks! The trick is I also want it to be street legal...
 

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Grumpy Old Goat Herder
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1,397 Posts
"I want to be able to put out 700-800 HP or more if possible"
With a 403 Olds on the street? Good luck! The only way that happening is if you use at least a 300 shot of nitrous, and you had better build it for nitrous. You could possibly use a Procharger, but I don't think that you would be able to make the shaker work.
 

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you can never know to much
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102 Posts
"No replacement for displacement" holds true almost all the time...

You could come closer to your 700HP mark with a larger motor (454 perhaps?) but it's still gonna be pretty extreme for a street build, IMO.

With the motor you have, I'd push for 450hp, and keep it streetable and reliable.

As far as your question on websites, I don't know of any (but I'm sure there are some out there that will help you) :thumbup:
 

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Old(s) Fart
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To get 700 HP from a street Olds motor, start by writing a check for about $15,000 to Dick Miller or one of the other Olds specialists. Throw away the 403 block and get an Olds diesel block (terrible diesel, but bulletproof gasoline motor). The Edelbrock 7111 won't fit under the shaker hood by itself. A blower is out of the question.
 
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