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ChadS
01-28-2006 09:12:19
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Re: compression ratio-verses-low end torque/luggin in reply to buickanddeere, 01-28-2006 07:06:17
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Alot of failure happens to engines that are not put on a dyno to properly set everything up. Flying by the seat of their pants tuning on high performance engines, your not putting the engine under a load to set the timing advances, and fuel. Then, when they put the stress test on, the part that isnt right will show up in a hurry, hopefully, they shut down if they hear something,, Why risk it? I know some of these monsters out there cant be dynoed,, but you can to a certain extent with a good pto,, you dont have to work them to death,,, just enough to put a load on the engine to see whats going on. if something is not right, it will show really quick. Ive ran my H at 290psi, which is out there,,,, everything had to be right, and did not abuse it while under a load on the dyno. See, it was a higher rpm engine, usually when I pulled, it was at higher rpms to keep the power up,,, I lugged it way down once down at princeton, that was the hardest that engine ever worked,, Just ran out of torque,,,, But it wasnt detonating, or preigniting either. Of course, Im builing a new engine again too,, few runs later, I cracked a sleeve, then cracked the block,, So, Im backing the pressure down,, but, a quesion arises,, If I had 100hp at 290psi at 540,, would I still have 100 hp if the pressure was down to a respectable 250psi??? Been told no,, But i havent done anything yet. Still building the deck plated block. Chad
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