gbauer,
Well that's what the Gonkulator said, gain of 21hp.
BUT - that's a 15% gain.
So that's like taking a 300hp 2bbl v8, adding a 780cfm 4bbl, and getting 345hp - sounds about right compared to lots of dyno stuff.
Headers are the same way, on a mild v8 headers only add about 5% across the board - 15ftlb, 15hp, etc. So if they add 5% to an inline, it's comparable. Our old obsolete numbers are all smaller, but the "eye candy" of any inline is catching on, for all makes. Good to see.
Curious to see what app you use and how it works out - Dynolicious for iPhone was a little erratic, better than nothing but not as good as a GTECH. A bargain for $10 though.
I still wonder if mshaw may be measuring 0-70mph or so when the needle reads 60mph. I have had the old ones do that - the speedo is right on steady state, but when you accelerate, it "lags", then lurches and catches up after you get OFF the throttle, which is a hint. I used to use speedometer & stopwatch when these cars were only 10 years old or so, but after 50 years the speedos get kinda sticky.
