waisting HP maybe , but I would have too think cylinder pressure would be much higher than our current method of centering it around TDC . As Josh said , Fingers prob has the most data on the subject .
Melting pistons.
- Thread starter McRat
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That we know , it also lifts heads , bends rods , and cracks pistons . finding the happy medium is the ticket . and drawing the line between what will work on a all out race built clear down to a stock motor truck running big power .
Your Assumming that the pressure is constant throught out the fuel system. Highly doubtful it is. The body itself causes enough restriction the pressure is inevitable
I drew the crank, rod, piston, and cylinder head with injector up years ago. I see if i can dig up some screen shot. I had the injection stream and everything drawn in. pretty neat stuff.
I call BS. Here Very few people have injectos capable of that. Using the canned tuning you are your not even coming close. To pull that off you would need to be able to get the fuel so fast with so little timing or the pressure would sky rocket and platue to early. I run injectors bigger than 99% of CR guys do and I can not pull that off.
Wrong CP = torque. But only if you peak cylinder pressure happens in the correct realationship to TDC for the given RPM. If it happens to early it will fight the up travel of the piston BTDC. That causes huge cylinder pressure and torque loss.
HP is a function of Torque and RPM.
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Damn your good Josh !@ .330 i cant cant imagine any of the spray making it out of the bowl but i have never seen a spray pattern to one of our injectors either ? I can say the piston is alot closer than i figured it would be !
yea a lot closer..
there is a point were the piston sits still as the crank continues to turn and then the piston starts to travel downward ,I would really be curious as to when that happens in Crank angle deg , I know it is at TDC , just dont know how long that event is , also the profile of the cam should be considered as well........when considering cylinder pressure .
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that i understand but TQ x RPM makes HP.....enough said, besides i said the same thing as you too, months ago in a thread where fingers said i was wrong due to his calculations.
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Damn your good Josh !
But remeber how slight the injection angle is (156*). That means the spray from the injector is only 12* off the head. I have in my notes that with a .010 up piston, "A" gaskets and a deliped LB7 piston that 28* is the break out point. With a stock LB7 piston 25*. Going to a 145* injector helps a ton. But who would do that.:baby:
thats where degreeing a cam comes into play.. and all the other junk we should consider..
That is way off base. Any burn prior to TDC is working against you. Period. Dumping all your fuel BTDC when your crank angle duration is 30*-60* just doesn't make sense.
However, we suffer some burn prior to TDC to keep the meat of our burn in the sweet spot of the stroke. When and how much vary with the pulse duration and the RPM.
But, what do I know.....
Wade you can read. Can't you? I posted
I call BS on every Dodge CR operates that way. I have Star scanned a 03 with PPE tuning it does not happen that way. It is very simalar to the Dmax. Very!