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Old 03-26-2006, 06:34 AM
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Desk top Dyno anyone

Hey i was wondering if some one could give me a baseline on a power line,I'm switching the cam shaft again,and want to see if it is going to hurt me or help thanks for reading :

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Old 03-26-2006, 12:25 PM
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I can do it for you but remember garbage in garbage out.

So give me every detail of the engine build you know.

Tmod
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Old 03-26-2006, 01:09 PM
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Quote:
Originally Posted by Tmod
I can do it for you but remember garbage in garbage out.

So give me every detail of the engine build you know.

Tmod
Thanks here it is
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Old 03-26-2006, 02:36 PM
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Thanks here it is
Not going to get far with nothing are we?

Tmod
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Old 03-26-2006, 04:08 PM
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I have an engine in DD that makes 45,000ft-lbs at 2000RPM I think your engine will make less than that.
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Old 03-26-2006, 05:20 PM
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Sorry went to town

here are the specs
400 small block Chevy
bored to 4.185 deck to 0 deck height
3.750 stroke crank
6 inch rods
forged flat top 2 valve release pistons 11:1 compression
Cam shaft is a Comp. Cam Hydraulic Roller (12-443-8)part #
Valve Adjustment
Intake 0
Exhaust 0
Gross valve lift'
Intake 0.540"
Exhaust 0.562"
Duration at 0.006
Tappet lift
Intake 294
Exhaust 300
Valve Timing@ 0.006
Intake open 41
Intake close 73
Exhaust open 84
Exhaust close 36
These specs are for the Cam Installed @ 106 Intake CL
Duration@0.05
Intake 242
Exhaust 248
Lobe Lift
Intake 0.36
Exhaust 0.375
Lobe separation 110
Fully roller retro fit lifters
hardened push rods
Jegs Hi-performance Heads (555-51441)part #
64cc combustion chambers
197cc runners
2.05 Intake 1.60 Exhaust
1.440 springs
Fully roller aluminum rockers
Victor Junior intake open plenum
750 double pumper carb

Hope these are enough on the engine sorry it took so long to post
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Old 03-26-2006, 06:02 PM
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Quote:
Originally Posted by BoomerADF
I have an engine in DD that makes 45,000ft-lbs at 2000RPM I think your engine will make less than that.
maybe not lol
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Old 03-26-2006, 06:50 PM
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Ok here is what I got using DynoSim for the testing, I think airflow numbers for the heads might yield better results but hey I run what I get.

I also assumed you will be using headers with some high flow mufflers.

Peak HP = 534@6500 RPM
Peak TQ = 512@4500 RPM

If there is anything you want to try differently just let me know.

Tmod
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Old 03-26-2006, 06:58 PM
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Take these #'s with a grain of salt (had to do some guessing on the heads) but accd. to Engine Analyzer v3.0 it makes 564hp @ 6000 and 532 lb-ft @ 4500. Also says it could use more carb.
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Old 03-26-2006, 07:38 PM
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You know, you can order a copy of Desktop Dyno for yourself. I think Summit Racing sells the program for like $39.95. Just remember that a $40 computer program isnt going to take the place of the real thing.
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Old 03-26-2006, 08:30 PM
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Thanks to everyone,did the powerband look pretty decent on it?Will it be a snail out of the hole?
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Old 03-27-2006, 04:56 PM
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Sorry for the late reply but gotta work sometime.

Here is the graph from my sim.



Tmod
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Old 03-27-2006, 07:24 PM
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what about mine

its a 383 .30 over, air gap, 750 holley double pumper coming soon (725 road demon on now) cam is 224 intake & .520 and the exhaust is 232 & .525 comp. is 10.33-1, pertronics flame thrower with ignitor II, blaster coil, 1.5" headers, 3" collector going to 2.5 reducers. all pipe is 2.5". i have two universal cats in 2.5" and two medium-high flow mufflers. no H pipe yet. 92 pump gas. temp usally around 60 at a baro of 29.92

New Rotating Assembly:
- 3.750" scat cast steel crankshaft
- 4340 6" scat I-beam forged steel rods
- Clevite 77 rod and main bearings
- Plasma moly Hastings piston rings
- Keith Black hyperuetectic pistons

New Parts:
- Dura-bond cam bearings
- Roller dual timing set
- Melling high pressure oil pump
- Steel sleeve oil pump drive rod
- Aluminum Dart Pro1 angle plug cyl. heads (2.08/1.60 valves, 180cc runners)
- Chrome dress kit
- Chrome oil pan
- Street series harmonic damper
- Cam bolt lock kit
- Gasket set
- ARP oil pump stud
- Oil filter adapter
- Silicone beaded intake gaskets
- Aluminum roller rockers (w/ 7/16 studs and 1.6 ratio)
- .080" wall chrome moly pushrods
- ARP cyl. head bolt kit
- Aluminum air gap design intake manifold
- T&L custom grind camshaft & hydraulic lifter set
- Melling oil pump pickup tube
- Spark plugs
- Oil and filter
- Brass expansion plug kit
- Valve cover hold down kit

Labor:
- All parts hand cleaned
- Block sonic checked for thickness
- Block pressure tested @40 psi
- Block stroker clearanced
- Block square decked w/BHJ fixturing
- Aligned hone mains
- Bored and honed w/torque plates
- All clearances checked to the nearest .0001"
- Rotating assembly internally balanced
- Engine blueprinted w/spec sheet on file
- Engine fully assembled and dressed to customer specifications
- Dyno tested
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