Cylinder heads are the most critical components of your engine, when it comes to how much power your engine can produce. The best cam, pistons, or intake are all at the mercy of your heads, in terms of how well they'll perform: poor-flowing heads will choke-off your engine, rendering other upgrades only marginally effective, at best.

Good heads, on the other hand, will allow all your engine"s components to perform to the best of their abilities. Dollar for dollar, cylinder heads are the best place to invest if your goal is to improve your engine's performance. But you don"t have to spend big bucks to get good heads.

A set of Nitemare Performance custom-ported Pontiac cylinder heads will get your more flow for less dough. No matter how mild or wild you want your heads, our blueprinting process starts the same for every head that we prepare:.

Our Nitemare Stage 1 head treatment focuses on improving the intake ports and bowls, but keeps costs down by leaving the stock Pontiac exhaust ports as they came from the factory. The intake improvements makes our Stage 1 treatment a cost-effective but ideal performance upgrade for a street-driven Pontiac that sees the occasional run down the strip. At cfm at 28"our Stage 2 "D"-port heads' intakes flow comparably to factory Ram Air IV heads, while our exhaust ports are lightly cleaned-up.

The modifications make Stage 2 heads a great choice for a serious street car or Pure Stock-type competition use. Stage 3 heads feature maximum-effort porting, while still maintaining a safe port.

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They are recommended for ci and larger engines. Must call for desired casting number and pricing.

650 vs 750 Carbureted Pontiac 400 Hits The Engine Dyno - '67 Pontiac GTO [EP7]

Please call with casting number requests. Above pricing does not include shipping. All heads are shipped separately in two boxes and will be insured.

best pontiac 400 heads

Online Stores Crate Engines. Engine Components. Oiling System. Cooling System. General information Performance Services. Exclusive Products. Dyno Results. Cylinder Heads. Gear Ratio.Jump to content.

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You currently have javascript disabled. Several functions may not work. Please re-enable javascript to access full functionality. Posted 02 February - PM. Posted 03 February - PM. Posted 04 February - AM. Posted 04 February - PM. Posted 20 February - AM. Posted 20 February - PM.

Community Forum Software by IP. Board Licensed to: The Firebird Nation. Javascript Disabled Detected You currently have javascript disabled. Supporting Members do not see the above ads. Please log in to reply. Posted 02 February - PM With a 60 over engine what heads would be the best choice if you are limited to 91 octane pump gas? What would be a good one to handle the job.

Pontiac engine. If someone could tell me a good casting number i would be very thankful. Posted 02 February - PM 6X heads work very well.

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Transmission: TH I'll have to calculate the C. I believe the 6x-8 and 6x would have a relatively low C. Posted 02 February - PM Pontiac heads are notoriously inconsistent from head to head- despite having machined combustion chambers the can vary in volume by as much as 4cc's.

Whatever head you choose, you should have them cc'd to determine the exact chamber volume, especially when you shoot for a SCR over I would also limit maximum compression to 9. The 72cc small chamber D-port heads most popular in performance applications like the no. I've cut down and radiused the valve shrouds around the valves on my sets of no. You'll also need to run a cam with at least degrees advertised duration and degrees duration at.

Posted 03 February - PM Thank you all for a very quick reply. Moving from MI to AZ really messed me up what the octane situation. I had readily 94 available and the heads I have on here do not like anything less. I have a set of 6x 4 and 8 waiting for me to change too. I was pushing 9. I have a cam with a mild lift so it goes alittle bump in the night. Thanks again everyone.It was introduced in as a spin-off of the Oakland Motor Division, filling a gap in GM's product lineup between Chevrolet and Oakland.

Brand excitement was rejuvenated in when Pontiac introduced its own V8, and it was the first step in positioning it as GM's performance Division of the s and s. Pontiac's Ram Air and H.

The Best Pontiac Heads

A powerful V8 and youthful styling made it hip to drive a Pontiac, and the Division maintained that reputation right up to that fateful day in the April when GM announced its was dropping the brand.

Today's Pontiac hobby seems vehemently divided when discussing the Division's death. Loyalists hold firm that it occurred in December when the last new Pontiac was officially produced, while purists argue that Pontiac ceased to exist after March when the last true Pontiac V8 was assembled and installed into a Pontiac vehicle.

best pontiac 400 heads

No matter how you perceive Pontiac's discontinuance, there's no denying that vintage Pontiac V8 performance is alive and well. Achieving streetable horsepower has never been easier for the average hobbyist, and the wide array of high-performance components available on today's aftermarket gives buyers countless options.

The and ci block castings remain the most popular foundations for modern Pontiac builds, but the Division produced several variations during the s and s.

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That begs the question, what should I look for when buying one? We took that up with the professionals at Butler Performance, and here's what they had to say.

Pontiac V8 History To gain a better understanding of Pontiac's V8, let's step back to the early s. Chevrolet was developing its ci V8 forand because Pontiac was a rung higher on the corporate ladder, GM felt that Pontiac needed to offer a similar level of technology to substantiate its higher cost.

Pontiac began developing an all-new, ci V8 also slated for The block was beefy to maintain the reputation of reliability while also allowing future displacement increases without requiring major retooling. The cylinder-head intake ports were siamesed for compact packaging and port volume was kept small to maintain velocity for snappy throttle response and strong low-speed performance to enhance its feel during typical driving conditions on the street.

Starting at ci fordisplacement increased in each of the succeeding years, while basic architecture of the V8 went unchanged. Total displacement grew to Available with two-barrel, four-barrel, and Tri-Power carburetion in that time, a heavy-duty with four-bolt main caps to increase bulkhead durability for Super Duty applications was also available through dealership parts departments, along with a host of other go-fast goodies.

To satisfy the need for the consumer demanding maximum engine output and to remain competitive with the growing engine sizes from other makes, Pontiac introduced its ci in late The oversized block was created by taking the heavy-duty and increasing the bore diameter to 4.

The main journal bore grew by 0. The Super Duty was Pontiac's most powerful offering for and It was factory-installed into a handful of Pontiacs in each of those model years, where it was feared by competitors at every level before General Motors pulled the plug on factory-backed racing involvement in January The basic became a regular production option in and the H.

Pontiac's and ci V8s were steadfastly popular and powerful. A small-displacement, ci V8 was added in for Pontiac's compact Tempest model line. To proactively promote a safety-conscious image during the mid s, General Motors prevented the use of multiple carburetors on all vehicles with the Corvette as the only exception.

The decision marked the end of the line for Pontiac's highly touted Tri-Power engines, and a single carburetor was forced to provide maximum engine performance. Pontiac didn't sit back and take GM's directive lightly, however.

best pontiac 400 heads

To maintain its image as a performance leader, it increased the bore diameter of its and ci by 0. In the process, Pontiac improved cylinder-head airflow by decreasing valve angle from 20 degrees to 14 and adding larger intake and exhaust valves.

A new cast-iron intake manifold derived from the highly successful single four-barrel that made the Super Duty such a competitor on the NASCAR tracks was created, and it was topped by Rochester's new wonder carburetor, the four-barrel Quadrajet.

As a result, four-barrel engines were capable of generating power equal to that of the Tri-Power engines fromwhile maintaining the potential for so much more. The basic continued through the model year, and the grew into the for when a 0. The went away afterand Pontiac went to work developing an entirely new small-displacement V8 whose total design was aimed at maximizing fuel economy.One of the most important components to an engine's performance is cylinder heads.

Butler Performance is the main source for stock and performance cylinder heads for your Pontiac. Butler Top End Power Packages. Butler Performance has built many performance engines over the last three decades. Each of these engines has the benefit of high-quality part combinations that have been engineered and tested in Performer Pontiac heads Send us your Edelbrock heads for custom CNC porting.

Edelbrock Performer RPM heads produce outstanding horsepower with excellent low speed torque and throttle response. Designed for c. Pontiac engines, these heads are patterned BP has conducted extensive flow bench, dyno, and track testing with these heads, all resulting in great performance numbers.

The Best Pontiac Heads

We have cylinder head packages for any application, from 7-second These heads have completely CNC ported intake and exhaust runners, so they are Edelbrock Victor Pro Port Heads. They feature raised intake port openings Pontiac Cast Iron Cylinder Heads. BP ports more Pontiac cylinder heads than anyone in the world. All Rights Reserved. Powered by Web Shop Manager.

Sign In or Create an Account.Heads create power, so it's important to know the best ones for your Pontiac. Though most Pontiac heads share basic characteristics with each other, knowing which are the best may still be confusing because Pontiac's head foundry only produced each specific head casting for one or two years.

With this list, you'll see the best Pontiac heads of all time and what characteristics allow them to make the list. D-Port heads are the most popular Pontiac heads. They were put in over 95 percent of Pontiac V-8s fromwith the most popular of these manufactured for model years They're called D-ports because of the "D" shape of the exhaust ports, which is the part of the head that connects to the exhaust manifold or header.

These heads are divided into small-valve heads 1. The valve sizes are for model years As a standard rule, big-valve heads were put on the high-horsepower Pontiacs, and small-valve heads were put on low-horsepower Pontiacs. Always go with the big-valve Pontiac heads because they are the ones that create the most horsepower. Here is a list of the top 5: - No. Round-port heads came on the highest-horsepower Pontiacs inand They are much rarer than Pontiac's D-port heads because they were produced in limited quantities.

They're called round-ports because of the round shape of the exhaust ports, which is the part of the head that connects to the exhaust manifold or header.

All Pontiac round port heads are big valve heads with 2. Here are the top 5: - No. Private manufacturers offer heads that will bolt onto your Pontiac V-8 block. These heads are designed primarily for race use and offer even higher performance than any factory Pontiac heads. This article was written by the It Still Runs team, copy edited and fact checked through a multi-point auditing system, in efforts to ensure our readers only receive the best information.

To submit your questions or ideas, or to simply learn more about It Still Runs, contact us. Aftermarket Heads Private manufacturers offer heads that will bolt onto your Pontiac V-8 block.

References Wallaceracing. About the Author This article was written by the It Still Runs team, copy edited and fact checked through a multi-point auditing system, in efforts to ensure our readers only receive the best information.The key to maximizing the performance of any combination is proper component selection.

By expanding on the approach that Pontiac took when assembling combinations for its production vehicles, selecting components that compliment the operating characteristics of one another for a particular application, you typically produce a powerful engine that operates efficiently and reliably over a long period of time.

There are a great number of machine shops, engine assemblers, and engine builders located throughout the country, and most are qualified to assist you in your quest for assembling a combination for your Pontiac V-8 that meets your performance expectations.

Contact information for several companies that are intimately familiar with Pontiacs can be found in the Source Guide. Here I provide you with an assortment of proven engine combinations from professional engine builders that use commonly available Pontiac engines as the basis. While any of those companies listed in the Source Guide should be capable of providing you with quality service and a reliable combination, space constraints prohibit listing every complete engine combination from each.

In fairness to all, sources are limited to those companies that build Pontiac engines exclusively. The instruction stated that the package must operate reliably and perform within a reasonable range of the estimated horsepower and torque values provided.

The builders were told that it must include cast-iron cylinder heads with mild modifications possible, a stockstroke crankshaft, a hydraulic flattappet camshaft, original intake and exhaust manifolds, and an original carburetor.

The use of certain aftermarket components was permissible, and these included certain aluminum cylinder heads, any aftermarket dual-plane intake manifold, and a roller camshaft, but it did require an original carburetor and cast-iron exhaust manifolds. The combinations on the following pages can be considered guidelines to arrive at the supplied horsepower and torque estimations.

While any number of components could certainly be swapped for a like item, longevity, performance, or street manners could suffer. I suggest that effects of any variance outside the stated combination be verified with your builder. Dave Bisschop is well known for taking a moderate approach toward building strong performance engines. In fact, he has been building and racing Pontiacs for a number of years, and has spent a great deal of time finding ways to extract even more performance from stock Pontiac components.

Some of the quickest stock-appearing Pontiacs in the country feature cylinder heads that have been ported by his company in Chilliwack, British Columbia. Dave is considered to be among the best Pontiac builders. Block Casting: Original block or equivalent or replacement. Preparation: Clean and magnetic particle inspect for cracks Crankshaft: Correct crankshaft for block or equivalent replacement.

Preparation: Clean and magnetic particle inspect for cracks; grind to next undersize as needed and fully polish. Pistons: Forged-aluminum flat tops or dished to achieve 9. Piston Rings: File-fit plasma-moly rings with. Main Bearings: Clevite or Federal-Mogul standard bearings with. Rod Bearings: Clevite or Federal-Mogul standard bearings with.

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Oil Pan: Original or OE replacement with baffle if replacement is required. Bearing Clearance: minimum of. Rocker Arms: Original stamped-steel 1.Part I. By Pete McCarthy. Airflow testing Pontiac cylinder heads was. There seems to be a fine line between a skeptic and a cynic. A skeptic is willing to believe, but is wise enough to entertain some doubts. A cynic has reached the point where almost nothing is to be believed. When it comes to the subject of Pontiac cylinder heads, years of bitter experience have put me solidly with the cynics.

Placing trust in a stranger can be risky business, indeed. It is small wonder that most of the top-performing racers have found it necessary to eventually perform their own headwork. There has been no "figure fudging. The entire project would have been impossible without the support provided by a man I have known and respected for over 24 years.

best pontiac 400 heads

Jerry's shop is equipped with every modern high-tech piece of machinery imaginable. The list of name racers who parade through Jerry's shop reads like a "Who's Who" of the racing fraternity.

Tools of the trade. To test exhaust flow, the laminar element is simply plumbed backward to "push" rather than "pull. Our "analysis team" also benefited greatly from the use of some of Jerry's homemade.

One such device is a clever "anemometer. Another test device is a vacuum-sensitive "manometer. A few minutes spent with this toy will quickly dispatch any illusions as to how airflow really behaves. The most common utterance heard as different observers used the probe was, "Well, I'll be damned. In addition to the access granted to all this equipment.

Jerry was able to provide the services of one of his journeyman technicians, Tony Sizemore. Fortunately for us, Tony is a die-hard Pontiac fan, and was more than willing to spend much of his own time preparing the numerous heads for testing.

Tony is also a student at Chaffey College, and the flow-bench information he obtained will assist him in preparation of an impressive term paper. Later on down the line, Tony's big-journal Pontiac engine will see considerable time on Jerrv's incredible, computerized color-display engine dyno.

The combined efforts of the cynic and the student should make for some interesting reading!


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