Need a plan - component selection for restoring 68 340 that runs on 91 oct
Good points on the carb autocuda
cams suggested are all shorter on the seat due to the lower compression so should have good vacuum
stroker is out for this build but we all agree except the owner so we are trying to optimize for his givens
A stocker 340 with less compression- but not as low as a late 340 which I do have some experience with
too bad comp does not make a XE268XL or XE262XL but the do not, and they make no FT cams special for AMC/MOPAR. The comp 268 is similar to a Mopar 260
Cams suggested should idle along in low gear with 3.25s in stop and go traffic then step on the gas and go up till the heads run out of air
not jeep rockcrawler low but City low should be fun should pull in top gear
valve job on stock heads makes a big difference and IDK about his head work
some said that low lift flow does not make any difference
here it does for a couple of reasons
First with stock exhaust manifolds you do not get a lot of exhaust pull on the intake/ scavenging and you have to watch reversion so not a lot of overlap so not a lot of squeeze on the LCA- we are setting the Intake Close first- not with lobe centers
Second without the exhaust pull we have to get the intake flowing with piston motion so low lift flow starts accelerating the intake mass and the velocity increases as the piston speed increases and the cam lift increases. No use starting the intake open early-exhaust close late-
it's counterproductive in this street car- you can ignore it in a street-strip or bracket car but not here with 3.25 gears and no torque converter
any other 68 AVS experts around?