67 pontiac 400 from gto - Pontiac GTO Forum
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post #1 of 8 (permalink) Old 11-23-2013, 03:49 PM Thread Starter
 
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67 pontiac 400 from gto

Hi everyone this is my first time here n I need some help I have a pontiac 400 outta 67 gto I am trying to do a mild cam n what not I am not trying to do heads or pistons can anyone help with a mild build ffor a pontiac 400 thank you in advance
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post #2 of 8 (permalink) Old 11-23-2013, 04:56 PM
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Hello and welcome,

To give you anything close to a valid answer we really need a lot more information. Stuff like, what car is it in/going in to? What's the overall condition of the engine? What are you planning to do with the car and how are you going to be driving it?

etc.

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post #3 of 8 (permalink) Old 11-23-2013, 07:36 PM Thread Starter
 
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It is in a 1990 chevy caprice and I plan on jus riding it taking it to shows and what not jus looking to do a mild upgrade the motor runs pretty well now but would like a lil more
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post #4 of 8 (permalink) Old 11-23-2013, 09:57 PM
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A Pontiac 400 in a chevy? I'd pay money just to see a picture of that

Someday I'm going to run a Pontiac engine in a 69 Camaro just to tick people off

I'm getting the impression that you're more into just having it sound good as opposed to actually making a lot more power (there's a vast difference in cost between the two). If that's the case, pick a cam that has a tight lobe separation angle (110 degrees or less) and around 230 degrees duration at .050 lift. If you go too extreme on the duration it'll kill the vacuum (and your power brakes along with it).

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post #5 of 8 (permalink) Old 11-23-2013, 11:08 PM Thread Starter
 
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I'm trying to get more power but not to the point to where I have to change pistons heads pushrods etc I'm lookin for good sound as well as performance I have a pic of the motor in the car but cannot upload it I also just put a 04 ls1 into a 79 grand prix
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post #6 of 8 (permalink) Old 11-24-2013, 09:20 AM
 
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Been kicking around throwing my spare 400 in a Fox Body mustang i have just to piss my Ford buddies off...
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post #7 of 8 (permalink) Old 11-24-2013, 02:28 PM
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IF your 400 has the stock 670 heads, it won't be a pump gas friendly engine. Compression is too high. A great all around cam for the 400 is the factory '068' grind. Friendly on the valvetrain, and good for low end and mid range power, which you need in that big heavy Chevy. Saw a '69 Ram Air III 400 out of a GTO installed in about a 1973 Ford pickup at a wrecking yard a few years back. Looked like it was born there.
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post #8 of 8 (permalink) Old 11-25-2013, 08:32 AM
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Quote:
Originally Posted by Instg8ter View Post
Been kicking around throwing my spare 400 in a Fox Body mustang i have just to piss my Ford buddies off...
Do it!!!

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  Pontiac GTO Forum > The 1964-1974 Pontiac Tempest, Lemans & GTO > 1964-1974 Tempest, LeMans & GTO Technical and Electrical Wiring

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