Lance ended it with this smilie which is called "mischief." If I were I would respond to Lance with this...
This isn't enough info for my program... As usual, I will fill in the blanks with common sense. I assumed the W heads are 69-74 model and heavily ported. I used 1.875" headers like you specified, but GOOD LUCK getting them in a Windsor equipped Maverick! If you were building a 408c, then you could use even larger headers. Looking at that monster cam and carb, I assumed Victor was the only choice, even though you don't specify intake. FWHP= Peak: 541 @ 6200 rpm Avg: 362* FWTQ= Peak: 526 @ 5000 rpm Avg: 398* *Measured 2000 to 7000 rpm. Effective power range= 3500 rpm to 7000 rpm. VE% at or above 100% from 4000 rpm to 7000 rpm. Peak VE%= 112% @ 5250 rpm. 1.32 HP per cube Vacuum at idle is 5.9"... Engine will have VERY rough idle. Exhaust flow vs intake flow is lopsided at 83.2%. Optimum is exhaust flow at 75% of intake flow. 38# injectors required to EFI this engine. 4663 ft/sec piston speed is EXTREMELY HIGH for this stroke/rod length. 2750 ft/sec is recommended. Exceeding this requires forged steel, billet steel, forged aluminum parts that are precisely balanced and fasteners of top quality. Intake runner velocity is high, costing rpm ability and top end power. 98 octane fuel required to make max power without detonation. Okay... That is what the PC gives me. Here is my opinion: Too much cam... Header size is unrealistic (and not available without making it yourself) 408 has the ability to make good torque, but choice of parts here kills that and takes the engine into an rpm range that it is not meant for. The computer's comment about excessive intake runner velocity is due to the mismatch between heads and cam. The heads are holding the cam back from making more power at a higher rpm:16suspect, rpm that you don't need!
Sorry i havent built the motor yet try'n to figure everything out first,the heads are 1969 ported to hell new everything on them,intake is most likely gonna be a Victor and the only reason i might use the 69 heads is so i can get it running until i can afford the dart heads,i am on a highschool budget.Headers we are mostlikely make,and why is that too much cam? Thanks, J.D.
I ran a set of AFR 225s on the engine. My program is not equipped with the Dart 225s. I don't have time to go through it all right now, but: The 225s raised EVERYTHING! HP, TQ, powerband, peak rpm, peak VE%, etc... Killed the bottom end even more. It did however provide relief on the exhaust imbalance. Went down to 70%. Idle vacuum went down to 3"! VE peak at 6000 rpm= 115%. 42# injectors needed for EFI.
Of course I was messing around. I could care less abour Dyno Simulations. They mean nothing until you race the car or dyno it for real. JMO
I agree as a guy i am know here in okc say's "WHEN A DYNO PASSES ME IS WHEN I'LL WORRY 'BOUT DYNO NUMBERS" Its just i would like to know what parts would be best and what base numbers i can get.
