dyno sheet, 408C pump gas

[Tnfastbk]

It does have a lot of torque for what it is. At or above 450 TQ from 3200 to 6000. I wish I could get better pump gas here (only 91 readily available) so I could raise the CR a bit. Admittedly, the cam is a bit too aggressive for most people's taste but it suits me. Chuck

First...giddy up.

Then, this is where guys like me look at your 408 CID, look at the 6500 RPM line, and see 666 CFM. At 100% intake efficiency you would be pulling in 767 CFM.

I know my 351 is never going to see over 5500 RPM unless my floor mat gets stuck on the gas pedal as I drive into the garage...again.

I would also imagine my car is definitely not going to be as efficient pulling in air either. Obviously, I am never going to need the CFM's you do.

How can I justify anything bigger than a 650 CFM carb? What feature/component of a carburetor should we look at besides the CFM?

And, I have attached a rotated sheet for those who are not rotationally inclined with PDF files(piece of crap Microsoft/Adobe aka MegaHardCrap/Straw) as it is very impressive and informative.

(Perhaps it shows why header manufacturers don't want their newly coated products put onto a freshly built engine, as one reviews the exhaust temperature numbers)

http://www.gtsparkplugs.com/CarbCFMCalc.html

 

[marks73]

Hey Chuck! ETA?

Chuck, how does your build specs compare to mine? My specs are listed in my garage just click on "my money pit" . Mine has never been on a dyno.

Roy, The bore and stroke are the same although my crank is cast and rods are I beam, your CR is higher, 9.5 vs 10.8, you have a single plane intake vs my dual plane, your 850 carb vs my 750, my cam is flat tappet with a hair more duration and .100 less intake lift and .058 less exhaust lift, my LSA is 110 vs 108 (apples to oranges comparison, roller vs FT), my heads are Ford iron 4v CC, Ferrea valves, home ported (sort of) vs AFD SP4V aluminum, Ignition in mine is Dura-spark distributor (small cap) with MSD 6AL amplifier. But other than that pretty much the same. Yours should be making more power than mine. How much I don't know.

link to octane rating differences:http://en.wikipedia.org/wiki/Octane_rating

That could possibly be acheived by merely changing to a duel plane intake. Should boost it a tad.

 

[Dave72Rcode]

great build and dyno numbers Chuck! amazing what 40-50 extra Cubic Inches can do for a Cleveland! how's your vacuum (brakes) on the tighter 106 LSA?

 

[c9zx]

The lobe separation angle is 110. The installed intake centerline is 106 (4 degrees advanced). The vacuum is 11.5-12.0. I added a vacuum pump for the brakes. The cam is more aggressive than the specs would indicate. A bit much for a pump gas 9.6 CR engine but, it works for me. Chuck

 

[vegasmax]

:thankyouyellow: Have a 73 Q Code 4 Speed Torino....all Stock and Complete.  Not sure if Block is really a 4-bolt or not.  Plans:  393 build forged pistons, I-beam rods, Aluminum heads https://www.ebay.com/itm/ford-302-351c-cleveland-hyd-roller-cylinder-head-top-end-engine-combo-kit/352048294061?hash=item51f7b6a8ad, I know not the best but on  a budget . 64cc  looking for 10;1 compression ratio using dished pistons,Hyd Roller Cam,FITech 600HP EFI,Hooker 6920-1HKR Competition Headers, 1970 Ford/Mercury,, 351C 4V,custom Joe Sherman Cam Grind $300.00.   Looking for torque around 500 if possible @ 5000max...would like it at 2000rpm  LOL!   Has Dual Point will keep and add MSD Box.   Plan to paint everything Ford Blue,retain A/C,P/S and Factory Air Cleaner  and Valve Covers,to achieve a near Stock Look.  Car is Red Black Buckets Sport Roof Magnum 500's.  Suggestions????      Might just build a different Engine and keep the original All Stock  low mileage car 30000 miles.  SUGGESTIONS?????   I would build  BBF  but need bell Housing and all ......but might.

 

[turtle5353]

Stay away from all that procomp junk. Just asking for trouble.

 

[OzCoupe72]

Great dyno results.

I'm yet to put my 406 together but good to see how different combos work