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351CJ & Boss 351 dyno numbers
#1
Ran across this article today - other than some basic mistakes and them calling the 351CJ a '70 engine with 10.7:1 compression, it seems legit. 

https://www.hotrod.com/articles/hrdp-100...-shootout/


[+] 1 user Likes Hemikiller's post
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#2
Nice find, thanks.



“If you can't explain it simply, you don't understand it well enough.”
--Albert Einstein
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#3
"The final small-block in our test was the ’71 Boss 351, which produced an amazing 383 hp at 6,100 rpm and 391 lb-ft at 4,000 rpm. Torque production exceeded 375 lb-ft from 3,300 rpm to 4,700 rpm, showing the big ports and valves on the four-barrel Cleveland heads can be made to work in the lower rev ranges when combined with the right cam and compression."

Obviously they got it all wrong because as we all know 4V heads are no good on the street. Poke

73 conv. 460, D0VE large valve heads, Performer RPM manifold, Voodoo 227/233 cam, Holley 950 HP carb, C6 trans, 3.25 trak-loc.
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#4
Hemikiller, thanks for posting, education is a good thing. DonC, so true the 4V heads are terrible. So, if anyone wants to give me their CC 4v 351C heads, I'll pay the freight. Chuck
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#5
(07-13-2018, 03:58 PM)TommyK Wrote: "The final small-block in our test was the ’71 Boss 351, which produced an amazing 383 hp at 6,100 rpm and 391 lb-ft at 4,000 rpm. Torque production exceeded 375 lb-ft from 3,300 rpm to 4,700 rpm, showing the big ports and valves on the four-barrel Cleveland heads can be made to work in the lower rev ranges when combined with the right cam and compression."

Obviously they got it all wrong because as we all know 4V heads are no good on the street. Poke

Yeah, they were so terrible on the street.  Haha


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#6
Awesome, from the article:

"Unlike GM, Ford maintained the ’60s-era high compression for one last year and combined the ’70 351 Cobra Jet displacement with the ’69 Boss 302 cam timing. The result was nothing short of amazing, as the ’71 Boss 351 is actually the most powerful small-block Ford or Chevy ever produced."

"With 383 hp, the baddest small-block of the muscle car era was actually produced in 1971." (referring to the Boss 351)

Ford certainly assembled some incredible engines during the classic musclecar era. I find it unfortunate though they just didn't seem to have the market penetration of the other manufacturers with their best offerings. I saw Chevy LT-1 350, 396, Buick/Olds/Pontiac 400 and 455, Mopar 340 and 440 (never saw a live Hemi back then), but only ever saw the more common models of Ford 289, 302, and 351 around back in the day. I know they were out there somewhere, but I never saw people with Boss 351, 428, 429, etc. in Ford musclecars. Those things seemed to be as rare as hen's teeth back then. Just one person's observations...
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#7
GM was much better at making their high performance engines available in almost everything they made. They were also usually "first to market" with high power engines. Ford was much more conservative in their marketing, both were mistakes in my opinion. If they had made the Ford 427 available in large numbers beginning in 1963 things would had looked much differently. You had to be a bit of a hard head back in the day to be running a Ford/Mercury. In my group of about 40 "street enthusiasts" about 30 were Chevrolets, one Fairlane, my Cyclone, one AMX, one Buick GS, one Dart, and one Charger. Ford didn't "get it" until the middle 80s. You had to embrace the role of the underdog to run a Ford in those days.
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#8
This was a great read. Thank you. It shows that the 4V Cleveland has a lot of potential for street use contrary to whats typically said.

Sent from my SAMSUNG-SM-G930A using Tapatalk

        [Image: 20160929_171923_edit2_small.jpg]

1971 M-Code Mach 1 w/Ram Air, 408 stroker, 285/291 0.558" roller cam, Blue Thunder intake, TKO600, Hooker headers with electric cut-offs, FiTech EFI w/ RobBMC PowerSurge pump
4-wheel disc brakes
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#9
The people who bad mouth the 4V head have never used them, tried to use a 2.XX rear gear, or installed the wrong cam. Chuck

P.S. I'm still waiting for someone to offer up their free 4V heads  Wink
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#10
I don't know about you guys but every time I go to the shed to get the lawn mower I give my CC4Vs a thumbs up.  thumb

- Mike
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