A tight piston is less likely to rock, make noise, and burn oil. NOTE: KB pistons can be installed tighter than other pistons. What kind of clearance would you recommend for the .02" hypereutectic speed-pro/federal mogul pistons that will go in my '67 289? A rocking piston … One thing though, they used to be bad about breaking at the skirt when ran cold, or the clearance was too loose and let them rock in the bore. Or even the SBT brand pistons, I would bet they are better than WSM slugs. Add the reading to 4.040 to determine the bore size.
By comparison, forgings are typically fit anywhere from .0020 to .0030 in a Harley engine, depending on the application. This allows for tighter piston-to-wall clearance, as well as reduced blow-by and piston slap. Please read instructions included with piston for correct piston clearance. KB Performance Motorcycle pistons are offered in Cast Hypereutectic 390 alloy and Forged 4032 low expansion alloy. -----350CID, Vortec 062 heads, Magnum 280, Performer Intake, Holley 650 DP, 3.42 rear w/ Auburn posi, 2600 Stall/TC
He seems to know a tad more than the average hot rodder. They can be installed with as little as 0.0005-inch piston-to-wall clearance … When a loose fit engine is desired the rigid skirt design of the KB Piston allows the builder a choice without fear of piston damage. When you're hearing it, you are listening to the piston skirts banging Hell outta the cylinder walls. For street, bracket racing, and oval track applications, these aluminum hypereutectic pistons feature an antifriction skirt coating that is highly resistant to scuffing and wear. Discussion in 'Engine/Tuning' started by brian97cobra, Nov 15, 2012. KB Pistons can be installed tighter than other performance pistons. As Wolf said, "The clearance is a function of piston design & application. The KB pistons have shown improvement in power, fuel economy, cylinder sealing, service life, and cost effectiveness.
The smallest reading occurs when the gauge is perpendicular to the cylinder wall. Our 4032 alloy is preferred for high performance or high compression applications and offers offset wrist pins for a quiet engine operation. To expand a bit on that. KB PERFORMANCE HYPEREUTECTIC PISTON KITS. Known as eutectic-aluminum-silicon alloy, it permitted the development of cast, high-silicon pistons with up to 20 percent silicon alloy. Example: Cylinder bore 4.04" I don't mind the rattle at startup as long as it will not damage the pistons.
A misaligned connecting rod causes what type of engine wear? Many aluminum piston skirts are plated with..... silicon content. piston to wall clearance?