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#1
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Could someone run these numbers in desktop dyno?
318 Block bored 0.04 over
9.2-1 cast high comp pistons Valves: 1.88 intake, 1.6 exhaust (could also run stock 1.78 intake, and 1.5 exhaust, I would like to see comparison) 3-angle valve grind. Minimal porting Edelbrock Performer dual plane intake holley 4bbl 600 cfm vac. sec. Hydraulic Cam- Isky- Lift .435/.435", duration: 262/262, @ 0.05: 208/208 Center 108 Dual Exhaust, running headers w/ 1 5/8 primaries I think that should do it, much appreciated if someone could run this combo through desktop dyno and give me some figures. Any comments or critisizoms are welcome too |
#2
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Remember, this is only a computer sim. Real world results could very well be better.
327 hp @ 5500, 366 tq @ 4000 w/ 1.88/1.60 valves.
312 hp @ 5000, 359 tq @ 4000 w/ 1.78/1.50 Valves. Done with settings of pocket ported wedge heads. The cam info was not enuff. I ethier need the exact specs of the opening and closing events or the Lobe Center angle (Cam degrees) and the Intake centerline (Crank degrees) (Which was done 110 & 108 as written above.) Just a note, if it is possible to surply the cfm rateings at various lifts, the dyno program can better predict the engines performance. IMO, your cam could be change for a Comp Extreme, Crane split pattern, Hughes cam. Stock heads can use help in the exhaust department. Even if ported. Ideally, you would want the exhaust to flow 70% of the intake. Otherwise, it all seems good from here. Hows the project coming along? Well I hope. |
#3
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Ok
Your combo made 250 Horses and 350 FT/lbs of torque. I dyno using a 660 cfm carb and mild bowl work on the 360 size valves (1.88/1.6) Flow was around 200 cfm .600 inch lift and 120 cfm at .600 inch lift very acheivable with any early 360 head smog or not! Those numbers were at 28 inches of water. But wait I had to I plugged the factory repalcement 340 cam in Made py Mopar (purple shaft P4452782) I installed it at 110 intake center line of 110 and with 114 deg reccomended! And Viola Another 50 horses and torque never droped! It will idle just as the old stock engines did!
__________________
68 Coronet 69 Super Bee......new 500 cid comin soon! 73 Duster witha missing 440/727 |
#4
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Now how the heck did we come up with a 77 hp diff?
How did you type it in? |
#5
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I started fresh with the short block plugged in the valve sizes and stock valve job, no mods. Flow was as metioned before. Used the intake he said except the 660 cfm carb. Also picked small tube headers with mufflers. I put all my cam numbers in manually, changed to .050 Dur instead of seat to seat. also a 110 intake center line. I would say that 300 horses is more real world, thab one thinks and this software is not off much, at least in this case. A warmed up 318 in good trim will make around 300 horses with aftermarket add ons. But still very streetable. The differeance was probably in the cam entering or head flow!
__________________
68 Coronet 69 Super Bee......new 500 cid comin soon! 73 Duster witha missing 440/727 |
#6
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I have DTD2000 too, I got around 200hp. That said, it is a simulation, that gives you places to go.
That sounds like a really good street setup, to me. Not so much cam, that it will lose torque, but still enough to get some jam. Nice for a fargo(if that's where it's going) However, from my own experience, I can't see that making 300 horse or better. Other than the headers, it's a stock hi-po, type of set up, and even 340's were only rated in the high 200's. I think the 250 is more realistic. |
#7
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Yeah, im looking for around 280, thanks for doing that guys.
The project is going well, I'm tearing the engine out tomorrow , hopefully things will go as planned. Thats odd, I thought that cam would be a perfect match, guess I'll go with the mopar 340 grind. Ihope rumblefish's numbers turn out to be the most accurate Thanks again. |
#8
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6 packin;
Ohhhh, I see. I did a 318 + .40 over bore, pocket ported wedge heads with both valve sizes as stated in his question and my reply. Small tube headers and mufflers w/600 carb, dual plane @ 9.2-1 comp. The big diff here is the pocket ported head input and cam. I wasn't very sure on how to input the numbers for the program. Duration was at .050 though. If FARGO318 comes up with the cam card and the numbers on it, the forcast would be a more accurate one. |
#9
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Quote:
A stock '68 or '69 318 2 bbl was rated at 230 hp. 300 is very obtainable in these little engines. |
#10
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dwc43, I think "rated" is the key word.
I don't know if factory ratings are relevant ,on many applications. I had a 73 340 duster. They were only rated at 240 hp. It was very quik, with no modifications. I also had a 69 dart with a 318 2bbl. It couldn't even dream of keeping up with the duster. 383 hi po only made 335 horse. Makes the 300 horse 318 seem like a bit more of a leap right? I'm not knocking the set up of the 318 in question. If anything I think it is a very good combination for the weight of the truck(other than going to a bigger engine. but thats another thread, I guess) I think factory horsepower ratings are about as good as factory compression ratings. 7.5 on that 400? Just round it up to 8.2! What do I know anyway? I have found my estimates of other people's hp, to be low when dealing with internet people. I keep forgetting, my elevation is fairly high here. Makes a big difference in some examples. |
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