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dyno sheet, 408C pump gas


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Someone may be interested in the results of a mid-range budget build. Runs on pump 91 octane (R+M/2). Standard correction used. Sorry about the sideways but...........Chuck

408C dyno sheet.pdf

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Sweet!

Nice flat torque "curve", holy cow. That should be one fine street piece.

Pete - MotoArts Decals and Signs

'71 Sportsroof 351C-4V/4-speed - FINALLY under construction - no, wait, on hold again...

'90 Mustang 7-Up 5.0 ragtop, rolling beater - SOLD

'66 Sunbeam Tiger Mk.IA, survivor

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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

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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)

 

408C_DynoSheet.pdf

11jmcuc.png

351C Bold Manners, Brash Attitude

Favorite Teams: Michigan Wolverines and Whoever Is Playing Ohio State.

 

When I drive past a herd of cows, the cows MOO at me

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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

 

Very nice..What a beast:) with only 91 octang that is incredible...What heads? 4v irons? or some kinda aftermarkets?

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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

 

Very nice..What a beast:) with only 91 octang that is incredible...What heads? 4v irons? or some kinda aftermarkets?

 

Iron 4V CC heads, mild porting by me with the use of a friend's flow bench. Chuck

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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:P. 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

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Chuck, can I get more stats on you cam such as advertised duration whether it's hydrolic or not, the LSA, Exhaust overlap? I'm super interested in cam dynamics and this would help me determine things down the road.

Solid flat tappet, 272/282 ADV. duration (compare to @ .050 duration you'll see the ramps are modestly aggressive), 110 LSA installed on 106. Chuck

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Nice build Chuck!!! Gives me hope of 500+hp for my 408 stroker build. I don't think I will be able to get there with my 2v heads. But not sure. They are ported pretty well and I will be running a roller cam and lifters. May have to buy some 4v heads and start over. Great build and good luck with the motor.

Kevin
1971 Mach 1

408C Stroker - C4 w/3,000 stall - 8.8" Rear w/3.73's - Disc brakes all way around.

 

 

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Nice build Chuck!!! Gives me hope of 500+hp for my 408 stroker build. I don't think I will be able to get there with my 2v heads. But not sure. They are ported pretty well and I will be running a roller cam and lifters. May have to buy some 4v heads and start over. Great build and good luck with the motor.

 

I think with 2v heads it would be a stump puller but to make power the 4v would almost be necessary unless you go to CHI aluminum.

[align=left]Jeff T.

 

When I die I want to die like grandpa, peacefully in my sleep... not screaming, like his passengers. [/align]

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What kind of transmission are you putting behind it?

2cossj6.png

97 F150: wrecked, 96 Dodge 4x4: blown motor / donated to the base

88 Suburban 4x4 355 cid 8 inch lift: sold, 95 Celica 5 speed : sold

68 F750 391 cid : sold,  96 F350 7.3 diesel dually : sold

86 Chevy 1500 305 cid c1500: sold, 73 Mustang mach 1 466 cid 5 speed : under construction

89 F350 4x4 cummins swap : sold, 64 Dodge d600: gone

00 Excursion: traded, 72 Mustang mach 1 302: scrapped

73 Mustang coupe: scrapped, 73 ranchero gt

06 Honda crf 450x : sold, 04 Honda vtx 1800

88 Bronco xlt lariat: sold, 76 Charger: traded

95 F350 4x4: sold , 91 Crown Victoria 302: sold

02 Dakota: traded, 96 f250 powerstroke: parts truck

87 f700, 98 e350 powerstroke: sold

03 land rover: traded, 95 f350 dually: part out

95 f350 dually: traded, 94 f150 4x4: traded

97 f250: sold, 76 Maverick 302: sold

91 240sx rb25: sold, 86 firebird: sold

86 Trans Am: sold, 88 westernstar: sold

89 dodge d350: sold, 2000 Dakota 4x4: sold  

84 f350 3+3: sold, 90 bronco: partout

67 catalina, 64 chevy c60

64 jeep j200, 74 corvette stingray

79 Lincoln mark V, 2013 f350: goldilocks

 

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What kind of transmission are you putting behind it?

It is a C6 with extra clutches, L servo, shift kit, deep pan, trans cooler, 3K convertor. Chuck

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  • 1 month later...

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

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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:P. 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. :)

2rr7aiv.png

 

Just cruising along minding our own business when BAM!!! The LAWS show up.

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  • 1 year later...

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

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  • 3 years later...

: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.

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