Originally Posted by superstreeter
after running 1 season with the oval ports, in the 9.30-40 range, depending on air, with a best of a 9.298 et, at 143-145, again, depending on air, for the next season, I did nothing else, except change to a set of mildy ported Canfield 310's, same intake, except ported to a rectangle port, which was a Victor-O 4500, same cam, same everything, only change was the heads, the car ultimately ran 8.989 at 150, with a string of 9.0's. I didn't dyno the engine after the head swap. But, I did dyno it later, and it made about 70 more hp than the ovals.
"Thats about what I would figure..you picked up 3 1/2 - 10ths, and it took 70 hp,, thats 20 hp per 10th"
but you contradicted yourself..in your post to me you said I needed 130 more hp to get into the 5's ( gain of 3 tenths)...then you said 20 hp per tenth.not complaining,just pointing it out :wink: although you did say in the quarter..not the eighth.
Originally Posted by superstreeter
I ran a set of 781 steel heads, with larger valves and some porting, then upgraded to the afr 305s,,,the car ran .15 quicker, pretty disappointing,,so don`t get your hopes up,,I think your going to need an extra 130 hp to get that goal, I have found that once you get into the 10s - 1/4 mile,,it takes about 20 hp to get an extra 10th