[ QUOTE ]
Eric,
Super Flow Dyno doing run sweep tests. Set at 300rpm per second.
Bub Whitaker's Burtonsville Machine is where our testing is done. Bub has one of the best reputations in the nation for Stock and Super Stock engines.
Many, many NHRA national record holders. Very well respected and <u>his dyno numbers are on the conservative side.</u>
Jerry
Jerry
[/ QUOTE ]
Agreed!...again, those sound like
very honest numbers.
As a side-note re: dyno figures...
About 25 years ago, the late John Lingenfelter took an out-of-the-crate GM LS7 454 and ran it on his dyno with a 163 intake, an 850 Holley and big-tube headers. Without any "fluff", it made 489 HP @ 6000 and 481 ft.lbs @ 4000.
(For those who may not know, that's a 12.2-1 454 with open chamber rectangular port heads and a solid lifter cam with .578/.612 lift and 262°-272° @ .050, as actually measured in this particular engine)
Talk about "honest" numbers.
(at one point in the test he bolted on an out-of-the-box Holley Strip Doinator intake, and the engine responded by actually
losing 20 HP and 30 ft.lbs at some points!...who says those factory intakes don't work
)
If a builder tried to deliver an engine like that today with those numbers, he'd be ran outt'a town!
And yet I still hear people today saying a crate LS7 would make 600+ out of the box.
Funny thing is, I can remember back in the `80's, there were more LS7-based engines running around the local tracks here than you could shake a stick at--and it was the norm for them to click off 10 second passes in a typically set-up "no tricks" bracket car.
Not bad for a measely 500-ish HP.
Jerry, it's not like you need any of my approval, but this is a great thread. Excellent job.
(Oh, btw...if anyone would like to reference the LS7 I mentioned, the build can be found in the November 1984 issue of Hot Rod magazine. The article is titled "Mail Supremacy")