Yup, I really need to get going on this if I want to make the Englishtown meet, I still need to figure out how much was taken off the head and block so I know what size MHG I need. Later.QWIKSTRIKE said:Get that thing together. Make sure all psitons are in great shape and tune the engine to avoid detonation. Looking good....
good points :bigthumb:Faded87T said:You don't need to know how much was taken off the deck. You only need to know how much the pistons sit below or above the deck. With variations in bearings, piston pin heights, rods, cranks, etc., etc. etc. every engine will be different. So it doesn't matter what the total deck height of the block was or what it is now, it only matters what the deck height is relative to the piston at TDC.
You don't need to know how much was taken off the head either. Every engine will have slightly different characteristics (i.e., the valves will sit further in or out depending on the valve job, porting, casting differences from the factory, etc., etc.). Just like the the bottom end, every head will be different, so it doesn't matter where you started out in total, it only matters where you are. And you can only properly determine that by CC'ing the head.
Once you know how much the pistons sit in or out of the bore, and you've CC'd the head - you can calculate the HG you need to obtain proper squish.
Dale H
87T
Even after just 20k there will be excessive taper? I will be taking the head and block to a machine shop so they can both be lapped for a MHG. If the bores are out of round then I can have the shop bore them out. If they are all good can I just hone the cylinders myself? Will honing deglaze? Thanks and sorry for all the questions.turbotoy said:No one can tell you if they are OK from lookin at pictures, you need to measure the bores and check against the specs in the TSRM. Likely, there will be excessive taper. In any case, a deglaze will always be required before installing new rings.
JT87NA said:Even after just 20k there will be excessive taper? I will be taking the head and block to a machine shop so they can both be lapped for a MHG. If the bores are out of round then I can have the shop bore them out. If they are all good can I just hone the cylinders myself? Will honing deglaze? Thanks and sorry for all the questions.