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Old 10-23-2002, 09:53 AM
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Post Olds 403

Hey, folks,

Has anybody had any experience with building a 403 olds. I want to make a 2-door delta 88 sleeper, and I am fond of the bore and stroke combo that make up this cool engine. Any suggestions would be apprecaited.

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Old 10-23-2002, 06:47 PM
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it is a very overlooked engine, but i've seen them make lots of horsepower. I was tech director at a large drag strip in michigan and the olds factory boys used to run there a lot, parts are hard to get but are available, try to get in with some olds clubs, there are a few out there ,they are very proud of the rockets!! when you can take an olds vista-cruiser wagon, drive it down I-75 to florida, win the Gator nationals with it, tear it down be declared legal put it together and drive it back to michigan,you have a real reliable power plant. this car would 8" wheelies off the starting line. and was always street driven.Don Holbin was the driver
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Old 10-23-2002, 08:17 PM
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YAY!! OLDS!!!

I very much like olds but never have i seen a 403 been worked on before. Info is good so here is a good website to get you started on info about engine and how to rebuild it
http://my.inil.com/~dlbrown/ofe403.htm#E403 403CIDEngineDetail
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Old 10-23-2002, 08:52 PM
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Well you got a great Idea there, i currently have a 455 in my 79 trans am, the motor is bone stock, except the one up cam and 800 holley double pumper. With the 275 gears in the rear she still flies down the quarter at 13.50. faster than most other stockers, and. wait till i get some gear in er. Keep searchin the web for parts if ya wanna do er up. just watch out, its pricey, thats why mine is still stock, goodluck.
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Old 10-24-2002, 05:35 AM
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The 403" Olds is a killer engine combo. I am surprised that you don't see more of them in NHRA stock classes. The bore/stroke ratio and the rod length/stroke ratio are very similar to the '67-'69 Chev 302 Trans Am engines, which were arguably one of the most powerful engines (horsepower to cubic inch) ever released in an American production car.
Breathing seems to be a limiting factor in any Olds V-8, but with a set of Edelbrock heads and some other goodies, I think the 403" can be a real neat engine.
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Old 11-05-2002, 04:35 PM
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thx for the info guys,
I checked out mondello's stuff and I am just going to play it by ear as I obtain parts.
When I was in High School I had a 4door 82'
88 with a 403 out of a 79' Trans Am, with the same TH350, and a posi traction rear out of a similar buick Le Sabre, My Dad fabbed up a really nice 2-1/2" dual exhaust with Dynomax turbo mufflers, and I had corvette 15/8's on it. I really like the car, but my gas mileage was around 11mpg, and I had to sell it because I could'nt afford to drive it to trade school in Detroit. I sold it to a friend of mine that could'nt drive very well, and a couple of years later the car was dented on about every panel that it had. for shame. But the exhaust still looked good.

Keep on roddin! <img src="graemlins/pimp.gif" border="0" alt="[pimp]" />
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