It made 106whp and 125ft/tg. with 40mm webers w/36mm chokes stock heat exchangers with a Bursch muffler.

think you would pick up some more HP with a 34mm vent?

Usually bigger vents are more hp...
(they hurt driveability and midrange, but they show bigger numbers at redline)

With a 15% drivetrain loss that is 122HP and 144ft lbs at the crank. Impressive.

I am assuming the 15% loss is HP AND torque ?

Thats spot on with what that kit made when it was designed with 40mm Webers.. I think 34 vents would make more power by a couple percent..

here is what I advertise that kit at..

Not bad! and it looks like my projections are spot on at the flywheel!

Considering a stock 912E engine made 76HP at the flywheel this 2056 kit is making a 40+% increase in power over stock. Not bad for a 2mm overbore, a cam and a tad of head work..

1 HP per Cubic Inch is all I ask. @ 60 cubic inches to the liter, that engine has a nice power to displacement ratio. I wonder how much gas it chews up doing so which tells much about efficiency. Any idea on the mixture.. is this a rich running engine?

At what RPM did it make those numbers?

The engine in my 912E is exacting the one in the graphs.. I have gotten a best of 40 MPG with it when it had about 40K miles on it. even after 23K miles on the same oil change and now with 106K on the engine in 4 years it still gets 32MPG or so. It hasn't had a tune up in two years and the last valve adjustment was in February of 2003.

Peak torgue is at 3800 and peak hp is at 5000. I think it does have 34mm chokes in it.

36mm vents are not generally available for 40IDFs. I have them custom made, or they can be turned down from 44IDF vents.

I'm not sure , Jake gave me some 32 MM chokes and although we didn't use them, Blake bores out the old ones to, I Think the same . I'll check this weekend and report. If they are 32's then I'll order some 34's and try them.

Heres the dyno sheet Click to view attachment

i can never get the pdf files to work. i'd like to see the torque curve. odd that the hp must fall off @5k. i should think it would have longer legs. which cam and flavor of heads?. nice tho. bet it has lots of back-o-the seat grunt to that 5k number.

k

I can never get the PDF's to work either. Is it an IE only feature?

I just tried getting the pdf with IE and it crashed. With Firefox nothing happens.

Jake, What AFR do you run to get those 40 mpg numbers?

Try saving the .pdf file, My system also has problems trying to open .pdf
files, this is the only way I found that would work.