In dyno testing the different intake manifolds on various engines, it’s found that the intake runner and plenum designs are main players in determining what the power curve for a particular engine combination will look like.
With the iron 113 heads on the dyno mule, the Edelbrock #257 2X4 intake that had been ported by Joe Craine did exceed those numbers generated by the stock Mummert intake and single four barrel carb combination. Now it was time to install the aluminum heads on the 312+ dyno mule and see how those same dual quad manifolds would fare. Continue reading “Y-Block Ford – Dual Quad Testing on Aluminum Heads – Part II”
While a dynamometer is a great tool for sorting out engine combinations, there are those instances where some of the data provided conflicts with other data also being recorded. A case in point here is where the EGT’s (exhaust gas temperature) do not match up with the results of the oxygen sensors. Continue reading “Y-Block, 585HP without a supercharger or other form of power adder”
Over the years I have heard a variety of numbers from 2% to 10% for what a point in compression ratio is worth in regards to horsepower output. The ten percent value obviously sounded a bit exaggerated while the two percent value sounded a bit on the small side. Continue reading “Milling Heads for a Horsepower Gain”
The much awaited for Mummert aluminum cylinder heads for the 292/312 Ford Y-Block engines are now a reality and have been tested on the DTS engine dynamometer. With no modifications these new heads were found to be worth a solid 56 horsepower increase over the stock “G’ heads with only the heads being swapped out on the test engine. Continue reading “Ford Y-Block Aluminum Head Testing Part I”
With the aluminum versus iron cylinder head baseline dyno testing completed, there were some other variables that were begging to be evaluated before removing the Mummert aluminum heads from the Ford 312 Y-Block test engine. These included increased ratio rocker arms and a variety of intake manifolds and/or carburetion setups. Continue reading “Ford Y-Block Aluminum Head Testing Part II”
Like any engine that’s in its planning stages, particular care must be paid to that engines intended use in order to select the correct parts and maintain those clearances that would be considered optimal for that combination. In the case of the blown engine for Randy Gummelt’s rear engine dragster, I’ve already covered some of the parts selection as well as the main support girdle construction in previous articles. At this point, I’ll cover in more detail some of the specific clearances and specialized machine work that was required to make Randy’s engine a reality. Continue reading “Blueprinting for an eight second Y-Block”