C Chevelle New Member Nov 14, 2019 #1 Hi was wondering what would be the minimum quench to run on a 540 bbc 10.5 comp, 630 lift, 230@50 duration Alloy heads , 6000rpm
Hi was wondering what would be the minimum quench to run on a 540 bbc 10.5 comp, 630 lift, 230@50 duration Alloy heads , 6000rpm
Grumpy The Grumpy Grease Monkey mechanical engineer. Staff member Nov 14, 2019 #2 welcome to the website Id suggest you try for no less than .043, Id try for .044 -.045 (1.12 mm) as a general rule shoot for a quench of Minimum .042", max .060", more important is the squish area and chamber shape. and you might want to read these links https://www.youtube.com/watch?v=LwLVOegI0Kg Quench: Unlocking Performance Squished Between the Piston and Head Quench is the clearance between the piston and cylinder head at TDC. It can affect engine effeciency and performance, if you truly understand it. www.enginelabs.com https://www.hotrod.com/articles/0606em-understanding-compression-ratio/ http://garage.grumpysperformance.co...ng-combustion-chambers.2630/page-2#post-54342 http://garage.grumpysperformance.co...mble-and-swirl-quench-squish.4081/#post-12283 http://garage.grumpysperformance.com/index.php?threads/checking-piston-to-valve-clearances.399/ http://garage.grumpysperformance.co...e-springs-and-setting-up-the-valve-train.181/ http://garage.grumpysperformance.com/index.php?threads/valve-train-clearances-and-problems.528/ https://uempistons.com/p-32-piston-compression-height-calculator.html https://www.lunatipower.com/compression-height http://www.wallaceracing.com/Calc-Piston-Pin-Height.php Last edited: Feb 1, 2023
welcome to the website Id suggest you try for no less than .043, Id try for .044 -.045 (1.12 mm) as a general rule shoot for a quench of Minimum .042", max .060", more important is the squish area and chamber shape. and you might want to read these links https://www.youtube.com/watch?v=LwLVOegI0Kg Quench: Unlocking Performance Squished Between the Piston and Head Quench is the clearance between the piston and cylinder head at TDC. It can affect engine effeciency and performance, if you truly understand it. www.enginelabs.com https://www.hotrod.com/articles/0606em-understanding-compression-ratio/ http://garage.grumpysperformance.co...ng-combustion-chambers.2630/page-2#post-54342 http://garage.grumpysperformance.co...mble-and-swirl-quench-squish.4081/#post-12283 http://garage.grumpysperformance.com/index.php?threads/checking-piston-to-valve-clearances.399/ http://garage.grumpysperformance.co...e-springs-and-setting-up-the-valve-train.181/ http://garage.grumpysperformance.com/index.php?threads/valve-train-clearances-and-problems.528/ https://uempistons.com/p-32-piston-compression-height-calculator.html https://www.lunatipower.com/compression-height http://www.wallaceracing.com/Calc-Piston-Pin-Height.php
J johnnmo Active Member Nov 14, 2019 #3 I agree with Grumpy. Also, limit quench area to no more than 25% of the chamber area.