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Mild 390 build advice

  #76  
Old 01-11-2019, 02:56 AM
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Okay guys, just got word that the cam arrived today, and thatís the final piece. The engine will be back together and on the dyno will be near the end of the week. I wanna hear your guys guesses as to hosepower and torque and at what rpm peak rpm. According to the desktop dyno program, (thanks again mike!) itís gonna make 298hp around 4500 rpm and 414ft lbs at 3000 rpm, at the wheels. My guess is 280hp at 4800rpm and 406ftlbs and 2600rpm.

Engine checklist
1976 390 block
bored .30 over
forget flat top pistons, roughly 10 to 1 compression
265/262 Lunati Voodoo cam
straight up double roller timing set
stock heads
performer rpm intake
650cfm thunder abs carb
hei distributor
hooker long tube headers + true 2.5in dual exhaust

I look forward to seeing what you guys guess, and comparing it to see how close it is to the actual output, and the desktop dyno program.
 
  #77  
Old 01-11-2019, 05:44 PM
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is it going on an engine dyno ?
numbers you posted were for Rear wheel on DD5 chart left 2 columns are crank
 
  #78  
Old 01-11-2019, 05:47 PM
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DD5 is a little high like 3-4% Torque seems to be more off with FE for some reason .
so dd5 says 351/487
my guess 340/450
 
  #79  
Old 01-11-2019, 08:29 PM
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Originally Posted by MIKES 68 F100 View Post
is it going on an engine dyno ?
numbers you posted were for Rear wheel on DD5 chart left 2 columns are crank
yup itís going on a dyno. I was just going off rear wheel because thatís how itíll actually feel
 


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