Originally posted by Dave Severson
Never have looked at dart heads for a Ford. got a good link with some flow numbers for them????

I can change the lift numbers, no problem. For about 200 bucks more on the kit price I can have them put any lift numbers on this profile that I want.... they have another one around .700 lift, gets really close on coil bind though... what lift number would work???

Help me here..... A longer rod has more to do with port volume then anything, right???? I built one short rod stroker, it was a pup compared to the long rods. Was it the velocity, the rod aspect ratio, or time at tdc that was wrong?????
IMO,for what it is worth the dwell time at TDC with the longer rod becomes more important with a larger port volume, higher comp. ratio and a blower,turbo,n20 also better piston skirt wear better ring seal,better ring life and cylinder bore wear.Here are some specs. on the heads I have built.I look more at the mid-lift numbere because the valve spends more time in this area then at max. lift of low lift numbers. These numbers are taken at 28 inches of water using a 2.055 valve with a under cut stem.The exhaust is 1.6 in dia. with a under cut on the stem. .200 lift 149 in./ 122 ex. .300 lift 209 in./ 159 ex. .400 lift /262 in./ 190 ex. .500 lift 290 in./ 224 ex. .600 lift 307/ 234 ex. .700 lift 316 in./ 242 ex.Sorry this is hard to read.