|
Stock Cam Specs?
Hey guys help me out.
What are the specs on a stock 87-93 5.0 cam? I know lift is .444" w/ stock rockers, but what about duration @.050" & LCA(114*,116*?) Also when running desktop dyno,what should i put in for my stock EFI intake?(CFM's),it lists intervals like 500CFM,550,650,ect.. Thanks in advance Ski ------------------ 88 GT subs,pullies,1 1/2 shorties,F.M.,3.73's,PRO 5.0 shifter,140,000 miles 8.881@78.09 Mcreary drag radials |
Desktop Dyno 2000? I have the stock head flw. file if you need it. I think the stock T-body flows 500 or 550 cfm? Model it using the tuned port injection manifold choice and the HP manifold and exhaust for the stock shorty set-up. Also model the cam using the adv. cam specs. or you'll get a funky torque curve (really pumped up at lower RPM).
If anybody has a SVO catalog you just post all the cam specs out of there. I beleive they have it in the section listing all the cams |
The duration @ .050" is 204,ford measures duration at .060". Lobe seperation is 116*.
I'm thinking of buying the software myself. Do you like it and is it easy to use? ------------------ 93 ex FHP 5spd,3.08,16' pony wheels with GoodYear GSC's,ac,ps,pb that's it. MODS. Mac cld.air kit,short belt,relocate ACT sensor to driver side fender well. 135K and still going. Best ET 13.834 @100.6 mph Best 60' 1.99 |
|
It's handy, since it shows about where peak torque and hp fall as well as making some airflow assumptions for volumetric effciancy and the like. The only downside is power predictions fall in with about a 10% range of error.
What are Ford's advertised specs. The airflow dyno model will more accurately predict the power curve if its stated in that respect. With .050 numbers it pumps up the low end considerably. |
Yeah, DD2000 is simple to use, all pull down menu's. the hardest part is correctly modeling the intake/exhaust components. Not to many choices there but you can still make a pretty valid assumption if you know how the manifold is designed. Ditto on the exhuast. Cylinder heads are easy since you can directly input upto 10 airflow points, along with valve size and test flow.
HP and TQ numbers aside, its useful for making fuel pump, injector choices or the like if you factor in on say a 500 hp engine, going with the 10% error, you could go best case and plumb in a fuel system for a 550 hp engine. Or if your wanting to base parts selection based on V.E its also handy. It's a good tool for making rough calculations, especially if you dont have a real dyno at your beck and call. the downside is if you go crazy in parts selection you can put together a 2 cid engine making 2000 hp and 5000 tq at 10,000 rpm. So its easy to trick yourself if you don't make some valid choices. When I first got the program I looked for dyno'd combinations in magazines and then try'd to model the engines on the sim. e.g. a stock H.O, I found that on the exhaust side if I chose hi-perf manifolds and mufflers, it worked better than using small header and mufflers. In any event it gave me a better grasp for how to model engine combo's |
I've got the specs here.
I.O. 17* I.C. 69* E.O. 67* E.C. 19* .444" lift for intake and exhaust, plug the numbers into the Desktop Dyno at .050 lift. It'll give you some impressive number though, so I don't entirely trust that program. Hope it helps.. |
I modeled an HO engine using the following inputs
Short Block Block: Ford 302 Cylinders: 8 Bore: 4.002 Stroke: 3.000 Cyl Vol: 618.40 Total Vol: 301.9 Cylinder Heads Cylinder Heads: E7TE Factory Airflow File: E7TEunported.flw (my own) Intake Valve: 1 Exhaust Valve: 1 Intake Valve Dia: 1.780" Exhaust Valve Dia: 1.450" Compression Compression Ratio: 8.70:1 Combustion Space: 80.31cc Induction Induction Flow: 550cfm @ 1.50 inHg Fuel: Gasoline Manifold Type: Tuned Port Injection Exhaust Exhaust System: H.P. Manifold & Mufflers Camshaft Camshaft Type: HO Cam Lifter: Hyd/R Cam Specs @: Seat to Seat Int. Valve Lift: .444 Exh. Valve Lift: .444 Lobe Center: 115.0 Valve Overlap: 36.0 Int Duration: 266.0 Exh Duration: 266.0 Timing @ Adv (+/-): 0.0 IVO: 17.0 IVC: 69.0 EVO: 67.0 EVC: 19.0 ICA: 116.0 ECA: 114.0 Peak HP @ 4500 RPM: 235 Peak TQ @ 3000 RPM: 323 Peak VE @ 4000 RPM: 79.3% If I soften the camshaft a bit by using the solid lifter model then it becomes Peak HP @ 4500 RPM: 220 Peak TQ @ 3000 RPM: 309 Peak VE @ 4000 RPM: 79% But that seems to fool things a bit as it skews the sim in favor of what was tested from the factory based on output alone. Factor in the following parameters and the 235/323 peaks seem viable? A/F ratio of 13:1 Detonation free gasoline 68 degree temp @ 0% humidity and atmospheric pressure @ 29.86 unless of course the engine was tested under the exact same conditions? |
| All times are GMT -5. The time now is 01:13 AM. |