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Boss 347 Dyno Results
#11
I like to look at these in a line chart. Talk about a flat torque curve.
[Image: BOSS_347_Dyno.jpg]



“If you can't explain it simply, you don't understand it well enough.”
--Albert Einstein
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#12
I would look at the transmission gear ratios and calculate how much the RPMs drop when shifting to the next gear. You definitely want to hit the next higher gear before the torque peak, when it is climbing, and you don't want to carry it way past the torque peak before shifting to the next higher gear. This has such a flat torque curve you have a lot of leeway.



“If you can't explain it simply, you don't understand it well enough.”
--Albert Einstein
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#13
(08-19-2018, 02:41 PM)Don C Wrote: I like to look at these in a line chart. Talk about a flat torque curve.
[Image: BOSS_347_Dyno.jpg]
Thanks Don! I forgot to ask for a graph, going after one on Monday. If I can make it idle decently, it should be fun to drive.
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#14
Yes, it should be an enjoyable, and impressive, ride. You'll be able to surprise a lot of people with that one.



“If you can't explain it simply, you don't understand it well enough.”
--Albert Einstein
  Reply
#15
(08-19-2018, 02:56 PM)Don C Wrote: Yes, it should be an enjoyable, and impressive, ride. You'll be able to surprise a lot of people with that one.

The surprise factor should be fun because, "Everyone knows Boss 302s don't make any power until 5000 RPM because they have those too large 351C 4V heads."  Wink
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#16
I'm always amazed by how many people still insist the large ports in the heads and manifolds can't produce any low end torque, when the Dyno sheets prove otherwise.



“If you can't explain it simply, you don't understand it well enough.”
--Albert Einstein
  Reply
#17
Did you record the run? Would love to hear the 7k rpm music!
Way beyond "red" line of many engines. What kind of valve springs do you have on these heads?

73 modified Grandé 351C. Almost done. 
71 429CJ. In progress
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#18
(08-19-2018, 01:10 PM)keiths71 Wrote: Torque is great, but there isn't  many things that sound better than a boss 302 @ 7,300!

Or a Pantera w/a 351C @ 7K

https://www.youtube.com/watch?v=79ePczeI...ture=share

"Clevelands don't make torque" - yeah, okay. Maybe since the engine builder thought you were building a 350 Chevy....


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#19
Wow.....so maybe I shouldn't give up my 302 for a 351C.
Would you share the components and specifications that made this thing so "Friskie".

Thank you,
HVY MTL
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#20
(08-20-2018, 11:30 AM)Fabrice Wrote: Did you record the run? Would love to hear the 7k rpm music!
Way beyond "red" line of many engines. What kind of valve springs do you have on these heads?

Not a great video but it is informational. Chuck
https://www.youtube.com/watch?v=h1DaK2S_spo&t=9s
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