Disapointed in my results..
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Disapointed in my results..
I went to the dyno with a group of Fbods for dyno day.. After dynoing my car I was shocked at my torque #'s... First pull was 402.47hp 368.28tq. With that said.. it went lean from 4-5.5k sitting right around 14... I know I have a small cam, but ****.. why is my torque so low!? My cam is in my sig, with .550 lift.. Could it be the combination of my small cam and the AF going lean to cause that much of a loss? Or is there something that could be worse then that...
Last edited by TexasLT4; 03-06-2005 at 04:21 PM.
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Originally Posted by Bo White
If your engine size is still 5.7 and your runnin 6.0 heads your compression is like 9.5 or so and that is what is hurtin ya.
#7
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It could just be something as simple as your spark table. The stock spark table goes down to 23* at 4800 rpm where you should be making your torque. Once you get the "timing speedbump" removed it should help, don't know how much.
Last edited by P Mack; 05-24-2007 at 09:12 PM.
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Good tuners often decrease timing and keep it more rich in the peak torque RPM range because engines are most prone to detonate there due to the highest cyl pressures occur there. When I see peak and valley ridges in fuel and timing maps in someone's custom tune it usually means it is a good tune and required a lot of time.
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Your heads are way too big for this cam. These heads are for big cube motors or FI. In order to get your moneys worth out of these heads (on your 5.7), you should be at least in the mid 230s and well over .550 on both sides. More like .600. You will not get much more torque out of these heads. The runner volume is just too much, but you can get a lot more HP.