Desktop Dyno Help
#1
Burning Brakes
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Desktop Dyno Help
Hey guys just finished dropping in my new 383 and wanted to get some SWAG from you builders out there on what you think my HP / TQ numbers will be at the flywheel. Here goes. I cant wait to fire this baby up. Darn painter better hurry I am freaking out, and going broke LOL
Short Block
· 350 4-bolt main block bored .030, clearanced
· Scat 5140 Forged 400 Crank
· Eagle 5140 SIR 5.7” Lightweight Rods
· TRW Lightweight Forged .030 over flattop pistons, 10:1
· Total Seal gapless chrome moly rings
· King main bearings
· 6qt Milodon oil pan black, with traps
· High Pressure Oil Pump
· Internally Balance Rotating Assembly
· FelPro engine gasket set
. Fluidamper
. Hays Lightwieght Aluminum Flywheel
. ARP everything
Valve Train
· Comp Cams Grind CS 280H-R10 part 12-430-8 Hydraulic Roller
280 duration .525 lift and exhaust 110 lobe seperation
· Comp Cams Roller Lifters
· Comp Cams hardened pushrods
· Comp Cams 1.5 Ratio True Roller Rockers
· Comp Cams True Double Roller Timing Chain
Heads and Intake
· K&N Triangle 14” air cleaner 3 " tall
· Edelbrock RPM AirGap Intake
· Edelbrock RPM Aluminum Heads 70cc chamber 2.02 / 1.60 Valves
170cc flow
· Edelbrock 750 Performer Carb swapping for 750 Speed Demon
. 1 Inch spacer
· Holley Mech Fuel Pump swapping for Holley Elec Blue
Ignition
· MSD Pro-Billet Distributor Tach Drive
· MSD 8.5mm spark plug wires, R&M Wire Looms
· MSD 6AL with Rev Limiter
· MSD Adjustable Timing Control
· MSD air/fuel mixture gauge O2
Exhaust
. Hooker Header 1 7/8 primaries
. 4 inch Side pipes with baffles inserts
Cooling
. Be Cool Aluminum Radiator
. Be Cool Aluminum Exapnsion Tank
. Edelbrock Victor Aluminum Water Pump
. Electric Fans
. 160 thermo
Short Block
· 350 4-bolt main block bored .030, clearanced
· Scat 5140 Forged 400 Crank
· Eagle 5140 SIR 5.7” Lightweight Rods
· TRW Lightweight Forged .030 over flattop pistons, 10:1
· Total Seal gapless chrome moly rings
· King main bearings
· 6qt Milodon oil pan black, with traps
· High Pressure Oil Pump
· Internally Balance Rotating Assembly
· FelPro engine gasket set
. Fluidamper
. Hays Lightwieght Aluminum Flywheel
. ARP everything
Valve Train
· Comp Cams Grind CS 280H-R10 part 12-430-8 Hydraulic Roller
280 duration .525 lift and exhaust 110 lobe seperation
· Comp Cams Roller Lifters
· Comp Cams hardened pushrods
· Comp Cams 1.5 Ratio True Roller Rockers
· Comp Cams True Double Roller Timing Chain
Heads and Intake
· K&N Triangle 14” air cleaner 3 " tall
· Edelbrock RPM AirGap Intake
· Edelbrock RPM Aluminum Heads 70cc chamber 2.02 / 1.60 Valves
170cc flow
· Edelbrock 750 Performer Carb swapping for 750 Speed Demon
. 1 Inch spacer
· Holley Mech Fuel Pump swapping for Holley Elec Blue
Ignition
· MSD Pro-Billet Distributor Tach Drive
· MSD 8.5mm spark plug wires, R&M Wire Looms
· MSD 6AL with Rev Limiter
· MSD Adjustable Timing Control
· MSD air/fuel mixture gauge O2
Exhaust
. Hooker Header 1 7/8 primaries
. 4 inch Side pipes with baffles inserts
Cooling
. Be Cool Aluminum Radiator
. Be Cool Aluminum Exapnsion Tank
. Edelbrock Victor Aluminum Water Pump
. Electric Fans
. 160 thermo
#2
Burning Brakes
Re: Desktop Dyno Help (ScubaJKD)
Max HP @ 5500 - 446
Max TQ @ 4500 - 468
Very nice torque curve 414 @ 2000 --> 468 @ 4500 --> 426 @ 5500
Actual cam specs (12-430-8) from Comp Cams Cam Disk
Dyno2000 V3.08
Max TQ @ 4500 - 468
Very nice torque curve 414 @ 2000 --> 468 @ 4500 --> 426 @ 5500
Actual cam specs (12-430-8) from Comp Cams Cam Disk
Dyno2000 V3.08
#4
Burning Brakes
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Re: Desktop Dyno Help (Ganey)
I was estimating 425 HP and 440TQ with a wide flat power band. Looks like I was pretty close maybe even low. I hope you guys are right. I can't wait. Just dropped her in last week. Painter should be done in a week then I can start putting her back toghether. Thanks for the help.
#6
Re: Desktop Dyno Help (vettetester)
The roller lifters make that the numbers are not really accurate. Read the manual, for all cam grinds except for all out race select normal flat tappet lifters, even for rollers.
:yesnod:
Marck
:yesnod:
Marck
#7
Burning Brakes
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Re: Desktop Dyno Help (Twinnie)
I am afraid to total it all up. Ha Ha Ha. I know its over 5K in this puppy. Big ticket items were internally balancing, retro fiting the roller cam, and aluminum heads. Come to think of it everything was a big ticket item LOL. Oh well how can you to no to the one you love LOL :crazy:
#8
Burning Brakes
Re: Desktop Dyno Help (Twinnie)
Adjusted numbers using roller cam specs (12-430-8) w/solid flat tappet selected to factor in a more realistic valve acceleration rate:
Max HP 421 @ 5500
Max TQ 447 @ 4500
Still 400+ TQ from 2000-5500
[Modified by mdsmith, 7:12 PM 8/5/2001]
Max HP 421 @ 5500
Max TQ 447 @ 4500
Still 400+ TQ from 2000-5500
[Modified by mdsmith, 7:12 PM 8/5/2001]
#9
Burning Brakes
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Re: Desktop Dyno Help (mdsmith)
Thanks for providing those specs however it is not a solid lifter roller cam. It is a hydaulic roller cam. Can you run them again. Thanks in advance.
[Modified by ScubaJKD, 6:42 PM 8/5/2001]
[Modified by ScubaJKD, 6:42 PM 8/5/2001]
#10
Burning Brakes
Re: Desktop Dyno Help (ScubaJKD)
Understand your cam is a hydraulic roller but as Twinnie mentioned in a previous post, the software vendor recommends using a solid FLAT tappet lifter type even though its a roller cam to provide more accurate valve acceleration characteristics for a mild street performance roller cam.
The specs used are perfectly accurate for your cam because the manufacturer's (Comp Cams) cam spec file was used in calculating the effect of the CAM characteristics. The overall result was "tweaked" slightly lower by selecting a solid FLAT tappet lifter type instead of a hydraulic roller lifter type. The software assumes a very aggressive valve acceleration rate more appropriate for full race engines rather than street engines which if used skews the result too high.
Mark
[Modified by mdsmith, 7:57 PM 8/5/2001]
The specs used are perfectly accurate for your cam because the manufacturer's (Comp Cams) cam spec file was used in calculating the effect of the CAM characteristics. The overall result was "tweaked" slightly lower by selecting a solid FLAT tappet lifter type instead of a hydraulic roller lifter type. The software assumes a very aggressive valve acceleration rate more appropriate for full race engines rather than street engines which if used skews the result too high.
Mark
[Modified by mdsmith, 7:57 PM 8/5/2001]
#11
Burning Brakes
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Re: Desktop Dyno Help (mdsmith)
Ohhh I get it. Thanks for the help looks like my original guess of 425 / 440 tq was pretty close. I really appreciate the work. Best wishes.
#13
Burning Brakes
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Re: Desktop Dyno Help (mdsmith)
Well heck in that case go ahead and run me out a revised tq and hp curve up to 6500 rpm. I will take all the free dyno desktop work ya got. Thanks again. Seriously, if its a problem dont worry about it, but if you get a chance that would be great. :D