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Small Block VS Big Block - A Game of Rat And Mouse
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| 505ci Build sheet | | Specifications not listed are the same as stock. Except as noted, all dimensions are in inches or fractions thereof. All prices sourced through Aerohead Racing, JMS Racing Engines, and Summit Racing. | | Displacement | 505.3ci | | Bore x stroke | 4.350 x 4.250 | | Compression | 10.51:1 | | Rod, center-to-center | 6.385 | | Piston deck height | 0.00 | | Chamber volume | 118cc | | Rod-bearing clearance | 0.0024 | | Crank endplay | 0.009 | | Piston-ring endgap | 0.024 top; | | | 0.022 second | | Piston-to-wall clearance | 0.0045 | | Main-bearing cap torque | 90 ft-lb* | | Rod-bolt torque | 63 ft-lb* | | Head-bolt torque | 70 ft-lb* | | *moly-lube |  To use a Gen V head on a MK...  To use a Gen V head on a MK IV block, this cylinder-head water passage must be entirely covered by a gasket made for this interchange. Our Fel-Pro 1017-1 head gaskets did the trick.  On some blocks, the water...  On some blocks, the water passage in question protrudes into the valley. Without the proper gasket, coolant leaks are the result. In this case, the block entirely covered the passage, so we were double covered.  Aerohead Racing delivers these...  Aerohead Racing delivers these heads with stainless, swirl-polished valves, hardened seats, and a nice three-angle valve job that actually opens up the exhaust-port throat a bit (according to JMS). We opted to have Aerohead install 71/416-inch ARP studs with Manley guideplates and upgrade our springs to accommodate our cam lift. It all added up to $1,115. We call it a steal, given our results.
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Gladiator vs. Mouse
I love your magazine, especially the engine buildups. After buying the Jan. ’02 issue, a...
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Rat vs. Mouse
More Power. The performance quest has always led horsepower junkies on a search not only for more...
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Iron vs. Alloy
There was a “what-if” question addressed a few months ago in our Performance Q&A column ...
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