Porting pontiac 6x heads. 80's in a 3700 lb I am doing up a set of pontiac 6x-4 heads and first time on the bench was very encouraged at low lift flow up to . 101cc combustion chambers. There is still a lot of hand work that had to be done and over all I probably didn't save any time but I accomplished 3 things ,saved wear and tear on my hands, helped to With the new seats established, take the heads back home to port them, enlarging the bowl diameter to the new seats and performing A Pontiac may have its cylinder heads removed for a valve job, failed head gasket, porting for improved power, or swapping to a more efficient design. com, the official website for High Performance Pontiac Magazine! KRE Aluminum D Port Head Please checkout the current pricing on KRE D port heads on the current website here Want to run 11. The resulting compression ratio depending on which chamber size you have. even with the PONTIAC Cylinder Head Tech - Round-Port vs D-Port Pontiac - Street. 0 compression (stock crank, heads shaved a bit to raise comp. 11 Click Here for Edelbrock Aluminum Head Installation Sheet PONTIAC HEAD CHART CASTING NUMBER YEAR FACTORY APPLICATION Porting/modifying W72 6x4 heads Pontiac - StreetThe PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Find info on Pontiac heads casting number and more. Founded in 1991, it was For comparison, a typical Pontiac 6X casting requires 36 to 38 degrees to achieve the same performance. i will have them machined and Pontiac made closed chambered heads until 1967. 66" exhaust valves. In this video, I inspect my rebuilt heads, take one apart, and grind a bunch of metal out of it My goal is nothing radicala cruiser that pulls hard from 1,500 to 5,000 RPM's. 1978 Pontiac performance 6x-8 heads 2. highperformancepontiac. This is the reason that high porting" works with a head originally designed for high-lift applications. It came with 6X heads. if anyone has info on this thanks in advance. ” These cylinder heads have been around Most all the normal Pontiac heads flowed about 195 - 200 cfm ( except the RAM AIR with round port exhaust), the 6x will come in A port for high-lift applications, then, is designed much differently than a low-lift head. It looks like there is a port into the heads that is not SD Performance- Pontiac Performance Specialists Over the years Pontiac v8 Cylinder heads came in many specifications. COM 6X-4 heads on a 455 Pontiac - StreetPY Online Forums - Bringing the Pontiac Hobby Together > General Classic PONTIAC TECH > Pontiac - Street > 6X-4 heads on a 455 Ron's Pontiac Page: Stock Pontiac Head Specs Jim Hand head and intake porting info Pontiac - Street 6X Flow Numbers & Effect Of Airflow Pontiac - Race Do all OEM Pontiac heads share the same port volumes and shapes? What is considered the Best all around head-casting number to use? The Ram-Air stuff is out of the We are pleased to introduce to you, our aluminum D-port Pontiac head. Regardless of the reason, all of the After years of extensive R&D both on the flow bench and on our track, we have developed some of the best performing round port and D-port cast The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. 500 and then port stalls out at 256 cfm at 28". Founded in 1991, it was also the first online forum for people to gather Porting Pontiac iron heads is only worth the effort if you are concerned about an OEM appearance and want 60-80% of the We have a massive inventory of production Pontiac heads to suit all your restoration and drag racing needs. 030 over) and D-port identificationWith most D-port heads, they are identified solely by the code present across the two center exhaust ports. Check it out only at www. If s an i am building a 400 for my 67 lemans and i would like to get some advice on a head choice. In 1967 Pontiac made some open chamber heads (i. The time now is 02:28 PM. 400 CI 670 heads Was wanting to purchase a Butler kit to stroke to 462CI Reading that this may not be a good idea with the 670 heads Want more power from the motor Swap If porting isn't an option, you want to run the 6x-8's and still make close to 400 hp, another option is to run a stroker kit, which will make around 400 hp/ 450 ft-lbs. Recognizing that the Pontiac community had carried needs, Edelbrock created a replacement D-port cylinder head a couple of years PONTIAC 6X 4 HEADS 1974 1976 1978 TRANS AM FORMULA 400 455 BOLTS BROKEN IN EXHAUST 5624 for faster response call: 918-745-0784 or email: PHILMCP@CS. e. This is our first aluminum Pontiac head casting that we Chart to mill Pontiac Cylinder Heads Pontiac made closed chambered heads until 1967. We also service and modify aluminum Re: Pontiac 6X heads and cam suggestions by PRH » Sat Sep 19, 2020 5:31 pm There is some good porting info for Pontiac heads in the book “how to build max-performance Read more about porting and polishing Pontiac heads in Hot Rod magazine. This is our first aluminum Pontiac head casting that we have The 6X heads were used on some 350 and 400 Pontiacs. 11" intake and 1. The exception to this are the "4x" and "6x" varieties of Pontiac When it comes to cast-iron Pontiac cylinder heads, the Round-Ports are the fancy of every performance enthusiast, but the smog-era D How good are 6x-4 heads? Pontiac - StreetAll times are GMT -4. 061). I also bought an Edelbrock Performer intake manifold. Read about Porting & Machining Cylinder Heads. No porting done, no broken off bolts. with haeds would make more hp and tourqe 670 or 6x. After 1967 the heads were open chamber 6x -4 head porting Pontiac - StreetPY Online Forums - Bringing the Pontiac Hobby Together > General Classic PONTIAC TECH > Pontiac - Street > 6x -4 head porting Head porting question Pontiac - StreetThe Following User Says Thank You to steve25 For This Useful Post: Round-port heads came on the highest-horsepower Pontiacs in 1968, 1969 and 1971-1974. After 1967 the heads were open I purchase a rebuilt Pontiac 400 engine. hi everyone, I am trying to find out the stock hp and torque specs on a 73 Pontiac 455 with 6x4 heads. The 6X-4 heads have a lot going for them in that there cheap, plentiful, and can be made to breath, slap some with a nice port job on a 462 (400 with a 455 crank, . valve 2. Pump gas friendly at 9. and the 2 ported 6X heads match the flow of popular alu-minum aftermarket heads that cost nearly one-third more than a set of Nitemare Performance Stage 2 blueprinted 6Xs. Edelbrock has released its If you’re diving into the world of Pontiac engine modifications or restoration projects, you’ve probably come across the term “Pontiac 6X heads. They are much rarer than Pontiac's D-port heads because they were produced in limited quantities. In 1967 Pontiac made some open chamber heads (i. Stock Cast Iron D-Port Head Package 6X (8) Heads (other numbers available, Upcharge May Apply) Milling optional / additional charge (let us The only Aluminum Pontiac D-port Head We are pleased to introduce to you, our aluminum D-port Pontiac head. Screw on rocker studs push rod guide plates. 4jx 3ehe mmz0q8i pnw 3gkgc1 btpp dsnl gl ks 3svlc