Circle Track Crate Engine Technical Manual - Chevrolet Performance
Circle Track Crate Engine Technical Manual - Chevrolet Performance
Circle Track Crate Engine Technical Manual - Chevrolet Performance
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Whistler Procedure<br />
The Whistler measures combustion chamber volume. Using the volume achieved with the tester<br />
along with the chart provided by the company, you will know the correct engine displacement.<br />
Measuring Combustion Chamber Volume for <strong>Engine</strong> Displacement<br />
Requirements<br />
� 110v Power supply<br />
� Portable Air Tank or Compressor<br />
<strong>Engine</strong> Preparation<br />
� Remove spark plug<br />
� With ignition off and distributor unplugged, crank engine<br />
to locate Top Dead Center (TDC) of piston in selected cylinder.<br />
� Purge any remaining gas vapors from selected cylinder<br />
using compressed air.<br />
� Insert Whistler adapter into spark plug hole.<br />
o When selecting cylinder to test, be aware that some<br />
engines require the removal of the header to accommodate the insertion of the<br />
whistler probe.<br />
� Check water temperature via gauge or thermometer.<br />
Testing Procedures<br />
� Plug Whistler into 110 volt power supply.<br />
� Turn on Whistler –<br />
� Adjust display as follows:<br />
o Re-Set the 3 switches as follows.<br />
� Left hand switch – set for numbers 4-6-8.<br />
� Center switch has 3 functions.<br />
� Center position – Set Temperature of engine.<br />
� Bottom position – Set displacement as determined by P&G test.<br />
o Maximum Reading for Chevy: 350.0<br />
� Top Position – this is where the actual reading will appear.<br />
o Right hand switch is used to set reading – either up or down to change readings.<br />
� Once the engine temperature and engine cubic inches have been entered – move the center<br />
switch to top.<br />
� Insert whistler probe into adapter in selected cylinder.<br />
� Make sure that the piston is at TDC.<br />
� Hook up air line to portable air tank.<br />
� Adjust air flow to 20 SCFH.<br />
� Rotate engine slowly in either direction to determine if TDC has been reached.<br />
� At TDC note the highest compression ration reading. Rotate the engine slowly in the other<br />
direction to determine the highest reading. Maximum allowable static reading is 10:1 as<br />
shown on the readout. If the reading is larger, cc the heads to determine the legality of the<br />
engine.<br />
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