1970 Dodge Dart 318 upgrades

I do not see any reason for a comp .842 Dual energy for a mopar The dual energy series cheaps out and uses the same lobes for intake and exhaust
the .842 XE series has separate intake and exhaust lobe profiles
example at another duration 275 than we are talking about in this thread 265 but same idea
.488/491 274/286 230/236 143/144 110lca/106icl 31 63 77 29 (60) 1800,6000 XE274H .842 not HL 2300 stall universal
.462/482 275/284 219/235 125/139 110lca/106icl 32 64 76 28 (60) 2000-6000 275DEH Dual Energy .842 universal one size fits all
if you do already have the DEH it looks like a candidate for 1.6 rockers on the intakes- but get your rocker geometry right first- spend the money there first

but IMHO there are better choices if you do not have a cam already and you are sure that 274-275 is the correct duration
.494/513 271/279 226/234 110/106 1800-6200 2400 stall Lunati Voodoo catalog grind shorter intake more dynamic compression
.518/543 271/281 224/234 112/108 Howard catalog grind
525 .350 273 226 147 HM226350 Howard intake master pick your exhaust and centerlines based on intake and exhaust and other build features
.525/525 275/287 231/237 149/ 110 comp XE275HL 2000-6000 smallest comp .904 HL grind unfortunately no 265 version
.477/477 275/275 225/225 108 2000-5500 2000 stall Lunati Street Master (SM) a budget cam
.529 0.353 275 228 148 HM2283525 Howard lobe for intake
.525 .350 275 231 149 Bullet HC 275/350 Bullet lobe for intake
.514/536 276/284 231/239 108/102 2800-6500 Lunati LA 9.5 3.90 Lunati catalog


Put the Voodoo cam in the simulator and ran it on a stock 318 with the Comp Cam. It appears to be a better cam once you get some RPM (higher stall TC and lower gearing) but like we said it depends on what your plans for the car are. For me who rarely ever gets above 3500 RPM while driving I want all the torque I can make low for my high gearing. The Comp Cam still seems to be the better choice for that as the peak torque and peak HP occur within my normal band of driving RPM. If I had gearing such I was in the 4500 RPM band much of the time the Voodoo is better and the Comp Cam is running out of steam quickly after 4000 RPM

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