Anybody have Dyno Graphs (the graph, not just peak numbers) of various engine combos (stock 1bbl, 2bbl, headers, 4bbl, turbo..............)

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Ed
64 Valiant 225 / 904 / 42:1 manual steering / 9" drum brakes

Buy the book Desktop Dynos. It has a DOS based program on a CD that will give you tremendous insight into the performance each of those combinations will provide. It even graphs the differences between them.

I have a copy of Desktop 2000, and would like to get Dragstrip 2000, just to have 'another video game'.

The program is very limiting with out things like flow numbers, and certain actual data... It was specificaly authored for the V-8 crowd and when a 'combination' falls off the data map it really shows up during a plot (I still like the fact a slant with 1000 cfm of carb will still make 10 more HP than a slant with a 650 cfm carb with a 278 duration cam...I don't think in the real world an NA slant could use the full spread of a Dominator...).


Anyhow, you really have to translate some things to make them work (like a hyperpak intake must be put into the intake style as "tuned port injection" to get a better idea of how it works, also even though the Chrysler service manual considers our engine to have a "wedge chamber", use the 'low performance' chamber for more realistic numbers since our intake and exhaust runners are very limiting (not the nice honker runners of say the magnum engines and the 351 Cleveland).



I would like to see a sheet of someone's flow numbers for their head with stock valves, then with a set of O/S valves...wish we had a millionaire who could take Doc over to an engine dyno facility and pull a 'Vic Edelbrock' article and do an actual numbers vs. hardware swap (I used to love those in the old Hot Rod magazines where Vic would take a 1967 grocery getter 383-2v and start replacing the intakes, carb, and then the cam and get you the $$$ vs best item to swap for the HP.)

good luck,

-D.Idiot

my spec sheet (for the cfm of the head after port and polish, bigger valves) are up in the slixers gallery, under "sick 6's duster".

unfortunately, I can't find anywhere what a stock 75 head flows like. The guys I took the head to to have the work done forgot to do it before they started the hi-po work.