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Bookmark or Share- BBC Intakes ---AFR 4910 vs Edelbrock RPM Air GapBtw, SUMMIT presently retails the AFR 4910 for $331.65, RPM Air Gap 7516 for $438.95. That's almost 25% less.
- Flywheel gap??? - Arborist, Chainsaw & Tree Work ForumRotate the flywheel and remove the business card. Give the flywheel at least one full rotation to make sure there is no contact with the coil and you have a slight visible gap when the magnets are aligned. Check for spark and you should be all set. If that doesn't work and you have the manual, find the proper gap specs.
- piston ring end gap - Team ChevelleGet a set of SpeedPro (Sealed Power) file-fit ones. Set the gap to around .004" per bore inch for a TOTALLY STOCK motor (929 cam and all), or about .0045" for a moderate street performance one. Set the 2nd ring to about .001" more than that. For a 350 (overbore doesn't matter), that'll put your top gap at around .018" and the 2md gap at about ...
- Air Gap RPM vs. Performer RPM - Team ChevelleOne thing I have heard about the RPM vs. the Air Gap is the RPM will help the engine run better during colder temps, probably due to the exaust passage way that runs under the plenum. '71 Malibu 402 big block/TH350 trans - Sold 2 Jan '08
- AC Delco R45TS gap out of the box - Team ChevelleTest engine was a 253 Cu in V6. Stock ign, 045 plug gap, it made 168 hp. With Platinum plugs, same 045 gap, it made 171 hp. Split Fire plugs, same 171 HP. With surface gap plugs, 172.5 hp. Then Jacobs installed one of his ign systems. With same stock plugs, same 045 gap, hp increased to 180.5. With three specialty plugs, hp dropped 1.5-2hp ...
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