Compression or Quench?
That's why I asked. Some people told me I still had to measure my piston to deck height even though I told them my block was zero decked. That's why I was a little uneasy about quench. Thanks Mr. Wright! And every one else! !!
I always check the piston to deck height of every piston in the engine, even if I'm told it's a zero deck. Double checking things like this during an engine build could potentially save a ton of headaches and problems. When your getting down around .035 and less for a quench you can't be guessing, you need to know exactly where that piston sits in each hole so you can make the correct decision for gasket thickness.
I always check the piston to deck height of every piston in the engine, even if I'm told it's a zero deck. Double checking things like this during an engine build could potentially save a ton of headaches and problems. When your getting down around .035 and less for a quench you can't be guessing, you need to know exactly where that piston sits in each hole so you can make the correct decision for gasket thickness.
If you don't actually KNOW the deck is zero, then you must check it, or have somebody knowledgable do it for you, and show you how to do it yourself next time. Don't take the machine shop's, or whoever's, word for it. You will need to buy some tools. Should also buy a book about engine building. Not just reading message boards. You get too many that don't know **** trying to give advice.
Exactly! My fiance dad's a master mechanic and has all the tools and Ive purchased a LT1 performance build book so I can better understand clearance issues. The book just wasnt all that clear on quench. I asked the question because of the LT1 experience in the forum, so I really appreciate the help. Hopefully I'll have some dyno numbers up soon!
Far as when quench becomes important for detonation resistance why not apply a very little bit of OBSERVATION.
I know someone suggested poor quench and 11:1 might detonate BUT reality is a LOT of heads/cam LT1s running around out there with over 11:1 compression with stock shortblocks pistons more than .020 down and gaskets in the .026-.029 range for quench of .046+. Reality is most are worse the stock shortblocks I have played with have been mostly .022-.027ish and I have seen reputable reports of up to .032.
Besides the fact that improving quench is going to raise compression and that improving quench is the most effective way to raise compression because milling the head making the combustion chamber smaller has less effect on compression than milling the block or using a thin gasket because the chamber is smaller "diameter".
I know someone suggested poor quench and 11:1 might detonate BUT reality is a LOT of heads/cam LT1s running around out there with over 11:1 compression with stock shortblocks pistons more than .020 down and gaskets in the .026-.029 range for quench of .046+. Reality is most are worse the stock shortblocks I have played with have been mostly .022-.027ish and I have seen reputable reports of up to .032.
Besides the fact that improving quench is going to raise compression and that improving quench is the most effective way to raise compression because milling the head making the combustion chamber smaller has less effect on compression than milling the block or using a thin gasket because the chamber is smaller "diameter".
Far as when quench becomes important for detonation resistance why not apply a very little bit of OBSERVATION.
I know someone suggested poor quench and 11:1 might detonate BUT reality is a LOT of heads/cam LT1s running around out there with over 11:1 compression with stock shortblocks pistons more than .020 down and gaskets in the .026-.029 range for quench of .046+. Reality is most are worse the stock shortblocks I have played with have been mostly .022-.027ish and I have seen reputable reports of up to .032.
Besides the fact that improving quench is going to raise compression and that improving quench is the most effective way to raise compression because milling the head making the combustion chamber smaller has less effect on compression than milling the block or using a thin gasket because the chamber is smaller "diameter".
I know someone suggested poor quench and 11:1 might detonate BUT reality is a LOT of heads/cam LT1s running around out there with over 11:1 compression with stock shortblocks pistons more than .020 down and gaskets in the .026-.029 range for quench of .046+. Reality is most are worse the stock shortblocks I have played with have been mostly .022-.027ish and I have seen reputable reports of up to .032.
Besides the fact that improving quench is going to raise compression and that improving quench is the most effective way to raise compression because milling the head making the combustion chamber smaller has less effect on compression than milling the block or using a thin gasket because the chamber is smaller "diameter".
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I got everything planned out. Scat forged everything, Mahle pistons, custom cam, dual roller timing chain, high volume melling oil pump, and TFS heads. The only thing i skimped on was the heads. I should have went with AFR's but TFS wasnt a terrible idea
You have to know your pistons are at least .005 down to use the .026 gasket and at that I would still check them all not just one.
HV oilpump is MUCH more likely to destroy the oilpump drive than it is to do anything good.
How much the heads are milled has nothing to do with quench since there was already a flat with the deck quench pad on the heads. For head milling to affect quench the combustion chamber would need to be full bore diameter.
HV oilpump is MUCH more likely to destroy the oilpump drive than it is to do anything good.
How much the heads are milled has nothing to do with quench since there was already a flat with the deck quench pad on the heads. For head milling to affect quench the combustion chamber would need to be full bore diameter.
You have to know your pistons are at least .005 down to use the .026 gasket and at that I would still check them all not just one.
HV oilpump is MUCH more likely to destroy the oilpump drive than it is to do anything good.
How much the heads are milled has nothing to do with quench since there was already a flat with the deck quench pad on the heads. For head milling to affect quench the combustion chamber would need to be full bore diameter.
HV oilpump is MUCH more likely to destroy the oilpump drive than it is to do anything good.
How much the heads are milled has nothing to do with quench since there was already a flat with the deck quench pad on the heads. For head milling to affect quench the combustion chamber would need to be full bore diameter.
