Not track times but an interesting dyno comparison that Mike did with the long branch manifolds:
"Now for some numbers: Best with exhaust manifolds, 464.6 Ft. Lbs @ 4700 rpm Peak HP 442.2 @ 5900 rpm. With borrowed 1 3/4 headers from a 74 GTO NHRA stocker: 18" long 3" collector, 481.6 ft. lbs torque @ 4800 rpm. 20-28 more ft. lbs. of torque everywhere. 448.4 HP @ 5800 rpm. Was not tuned to the headers, so 10-15 HP more on top could be expected. No reason to tune to headers because they are not going to be used."
Eric
__________________
"Everybody has a plan until they get punched in the mouth" noted philosopher Mike Tyson
Life begins at the end of your comfort zone.
“The mind, once stretched by a new idea, never returns to its original dimensions.”
|