Originally Posted by offshore420
(Post 3554522)
OK, I see.
I can tell you this, from my experience with Desk top dyno, plugging in all the numbers and running a hundred diff. combos, then picking the combo and putting it to the test on a real dyno, it was a total waist of time. DD number's weren't even in the same ball park as the actual dyno runs. Using 990 head flow numbers and my cam info got me within 10hp of what my actual dyno numbers were. The numbers were a little stronger in the low rpm range but still close. Using some flow estimates from JimV, the DD numbers were pretty close to what I was told I should see with a slight bump in CR, bigger intake valves and porting. The rpm shift was exactly what he said too. But, it was more for fun. |
Jim V. did the work on my heads. Maybe he still has the before and after flow numbers ??? I lost my sheet he gave me.
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