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Boss 347 Dyno Results
#1
[attachment=47723]I ran the Boss 347 on the Dyno today with very good results, at least in my opinion. Chuck


Attached Files
.pdf   Boss 347 Dyno Sheet.pdf (Size: 2.05 MB / Downloads: 75)
[+] 1 user Likes c9zx's post
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#2
1.5 horse per cubic inch is pretty dam good, and 434 lbs of torque should ruin some tires, well done.
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#3
(08-17-2018, 07:06 PM)Canted 393 Wrote: 1.5 horse per cubic inch is pretty dam good, and 434 lbs of torque should ruin some tires, well done.

It may not be very "user friendly" but what the hell, it sees 300 miles a year. I need to change a lot of chassis things (again) back to the "Ricky Racer" configuration. For a 10:1 engine it is pretty cool. Chuck
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#4
I had no idea you were planning to pull 7k with that motor!???! I bet it sounded good there.

It is a beast!

Congrats.

Ray

1971 Boss 351  
1972 Q code 4 speed convertible 
1971 Mustang Sportsroof  351-2V FMX 
1973 Mach 1 (parts car)
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#5
Wow.... for rear wheel power thats amazing... i won't be even close with my 408 in HP. Lots of power at the top end.
That most be an aggressive cam
What are the specs?

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        [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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#6
Nice. That torque curve is nice and flat.

'73 Grandé H Code. Headman long tube headers, T-5 Transmission, 3.70 Traclok, Lowered 1" all around, Aussie 2v heads w/ 2.19 intake, 1.71 exhaust, screw in studs, full roller cam 608/612 lift 280/281 duration LSA 112, Quick Fuel 750 CFM double pumper, AirGap intake.

'73 F code convertible. Bright red. Needs total restore. (IE HOT MESS)

- Jason
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#7
Congrats, that engine should be a blast! ( not literally) I drove a 4:30 geared , 70 boss 302 with engine mods. about 70,000 miles mostly on back roads of Conn. during the time l had it. I'm 59 and that was my favorite car ever. Kudos to you for building the engine I would have liked to. A Boss with good torque #s. Sweet!
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#8
(08-17-2018, 09:20 PM)tony-muscle Wrote: Wow.... for rear wheel power thats amazing... i won't be even close with my 408 in HP. Lots of power at the top end.
That most be an aggressive cam
What are the specs?

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That is flywheel HP not rear wheel. Chuck
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#9
So looks like the place to shift would be around 5,000 rpm. Torque is what gets you down the track not HP. When I was talking with Lee Moody of Holman Moody he said that is the biggest mistake people make is go for rpm and not torque.
When you get it in the car your rear end will tell you when it quits pulling and time to shift not the tach. Tach is for staging and about it. Will live much longer at the lower rpm.


When a man is in the woods and talks and no women are there is he still wrong??
Tongue
David
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#10
Torque is great, but there isn't many things that sound better than a boss 302 @ 7,300!
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