Best way to get over 400hp out of a Pontiac 400 - Page 2 - Hot Rod Forum : Hotrodders Bulletin Board
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Old 03-19-2013, 10:26 AM
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Put an identical engine and drive line in a GTO and in a Firebird 400, the 'Firebird 400 will be a second quicker. That includes a GTO with the overrated Ram Air V engine.

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  #17 (permalink)  
Old 03-19-2013, 10:31 AM
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Originally Posted by Mr. P-Body View Post
Many ways to "skin this cat", so be careful. There are many self-proclaimed "experts" regarding the Pontiac, and some actually ARE. Some are not. I agree, Butler Performance is an excellent shop. It's not the ONLY good one, though... And beware the "builder" that doesn't HAVE a shop... There are few of those out there, too. Contrary to popular belief, the guy that shoves the pistons in the holes is not necessarily "the builder". Engine building is a "trade" not an operation. The "operation" often confused is "assembly". The "builder" is the one that measures everything, makes determinations for what's needed, and decides what modifications are called for for a given application.

Jim
Amen...Thanks Jim
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Old 03-19-2013, 12:02 PM
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By the way, Jim (Mr Peabody) is one of the expert Pontiac engine builders mentioned in Jim Hands book (Pontiac bible).. Besides that, I know a few guys who had motors built by him and they are very satisfied...
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Old 03-19-2013, 12:24 PM
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Originally Posted by Bonneville462 View Post
By the way, Jim (Mr Peabody) is one of the expert Pontiac engine builders mentioned in Jim Hands book (Pontiac bible).. Besides that, I know a few guys who had motors built by him and they are very satisfied...
I for one did not know that, this would help explain why I enjoy reading his posts, being a big Pontiac fan and all. I thought I knew a fair amount about engines and especially Pontiac engines. I joined this site several months ago to learn and I found out I knew a lot less than I thought I did.

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Ray
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Old 03-19-2013, 12:24 PM
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"Gee! Thanks Mr. Peabody!" - Sherman

Sorry; I had to. We do a lot of 4 speeds for Pontiac guys; and their cams are a lot more mild than I was normally accustomed to. KRE, Butler and Jim Taylor along with Mr P-body all seem to have similar recommendations FWIW. Most engine assemblers can build a Pontiac, AMC, Briggs and Stratton...whatever; but when you get advice from a specialist engine builder; it makes a difference. The devil really IS in the details.
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Old 03-19-2013, 12:25 PM
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argh double post
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Old 03-19-2013, 01:26 PM
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In 1972, I sold the '69 Firebird 400 and I bought a clean '55 Chevy 210 2-door with a 6-cylinder engine. Still hung up on Pontiac engines, i decided to replace the stovebolt six and install a stock 1970 455 Pontiac engine in the '55 Chevy. I used 2-Holley List 4224 660 CFM center-squirters on a OFFY 360* manifold, '67 GTO headers, a 1963 Muncie 4-speed, custom made drive shaft, Zoom clutch and pressure plate, Lakewood steel bell housing, battery went in the trunk, and every thing fit perfectly. I also removed the rear seat and carpeted that area, "Two-Lane Black Top" style.

The third time out, I broke the rear U-joint and spun the axle before I realized that I needed to reinforce the spring perches. I could not cool the big Pontiac engine with the OE '55 Chevy low pressure radiator so I had a salvage yard '65 Oldsmobile 4-tube radiator sectioned using the '55 Chevy upper and lower radiator tanks and that solved the overheating problem.

The '55 Chevy ran mid-13s, stock cam, closed exhaust, G70-14 Goodyear Polyglas GT tires and the OE '55 Chevy 3.36:1 rear end. I broke the rear end one Sunday at Waul Drag Strip (concrete with lots of bite) near San Angelo TX, and broke another rear end practicing a launch in front of our apartment. Fortunately, in the 1970s, the salvage yards were full of '55-'64 rear ends, but no Positractions. Sadly, the Waul (Wall) Drag Strip, lately known as San Angelo Drag Way, closed in 2010. It was a old abandoned concrete air strip without a shade tree within 60 miles. .

I found a '57 Pontiac axle housing with a 4.10:1 Safe-T-Track third member at Hot Rod Exchange in Dallas TX. I broke the old '63 Muncie 4-speed transmission before I could purchase and install the '57 Pontiac axle. In 1975, I sold the '55 Chevy for $1200, including the broken transmission .

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  #23 (permalink)  
Old 03-19-2013, 01:35 PM
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Put another green plutonium pellet in the delorean's mr fusion, doc.
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