Part I of this article went into detail as how to find exact TDC. With that now behind us, the actual process of checking the camshaft and how it is currently phased within the engine can begin. For this, a 1.000” travel dial indicator will be required that can measure the up and down motion of the lifters. While the number one cylinder is customarily the cylinder of choice in which to check the camshaft, any cylinder can be used to degree in the camshaft once TDC has been found for that cylinder. In fact, later in this operation another cylinder will be checked in which to both verify the results obtained off of the first cylinder check and also insure that the camshaft is at least consistent in values on two different cylinders. For now, the number one cylinder will be used as a reference.
Most camshaft timing sets for the Ford Y family of engines (239/256/272/292/312) requires that there be twelve pins between the timing marks on the sprockets and for those marks to be on the oil filter side of the engine when doing the initial chain installation. The exception here is that this only applies to Y engines that actually use a timing chain and does not apply to right hand or reverse rotation marine engines that use a gear to gear setup. While the Y is not the only engine to use the pin or link count between gear marks to time the camshaft, most V8 engine families simply align the timing marks on the cam gear and crank gear with the centerline of the engine. Due to the infrequency of engine manufacturers using the pin or link count for camshaft timing, it does leave the door open for mishaps by those not familiar with this.
By using just the right combination of parts, exceeding that magic 1HP to cubic inch ratio is indeed possible while still doing it with a pair of unported iron Ford Y-Block heads. The key here is in using a modern piston ring design and maximizing the compression ratio while still being able to have an engine that will run on available pump gasoline. Not to be left out are the intake, carburetor, camshaft, and cylinder head choices which are also just as important.
I was recently given the opportunity to rebuild a pair of Ford 292 Y-Block engines with each going into 1963 F100 pickups. While both engines started life out as 1963 two barrel pickup engines, one was a restoration project while the other was to be a mildly hopped up version. The engine for the restoration pickup was to be built as close to stock as possible while the other engine was to use the normal performance upgrades such as four barrel intake and carburetor, larger valved heads, and a better than stock camshaft.
It’s pretty well known that engine oil with a higher rated viscosity tends to rob power from the flywheel end of the engine. It’s this mentality that has the new car manufacturers using lighter weight engine oils in which to increase the fuel efficiency of their engines as well as pick up some additional power.
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.
Although I normally wouldn’t advocate a high volume oil pump for a run of the mill Y block (1954-1964 Ford 239, 256. 272, 292, 312), I did run into a situation where the use of one would at least be a temporary fix until a new engine could be built to replace the current one. Continue reading “Hi-Volume Oil Pump For the Y”
What started out as a simple dyno test to evaluate the performance differences between the small and large port Edelbrock three deuce intake manifolds ended up turning into a full blown test where seven different 3X2 intakes were compared on an engine in a back to back dyno test. The other intake manifolds being added to this test included three different intakes wearing the Edmunds brand, a Weiand intake and an Offenhauser intake.Continue reading “Y-Block Ford – 3X2 Intake Testing”
The Holley model 4000 four barrel carburetor that came as original equipment on single four barrel equipped 1956 and earlier Fords, Mercurys, and Lincolns is not up to its full potential when used with the ’57 and up Y-Block distributors. Continue reading “Modifying the Holley Teapot four barrel carb for late model distributors”
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”