Cam recomendation?(Rough estimate)

[gregsdart]

We are going to build a 408 street smallblock, 3.73 gears fourspeed, 10/1 compression, probably an airgap dual plane, heads yet to be determined, although if I can find a decent set, 318b aftermarket iron , or better. The goal is a motor that will idle with a little lump, pull between 10 to 14 inch vacuum, have excellent torque for street driving and some gas mileage (10?,12?) and maybe a power peak of 5200 to 5600? My WAG is something in the mid 220 range at .050, intake, another 6 to 10 degrees on exhaust, with an lsa in the 110 range? What have you run, and did it meet the goals i am after?

 

[middleagecrisis]

230@.050 (flat tappet) or more, on intake should meet the goals you listed. A 408 will take more cam than a stock stroke 360.

 

[413]

You will need a magic wand to meet those goals.

 

[1MeanA]

I had a 408 with a Hughes hydraulic roller in the 230 duration range that was good...no idea on mileage.

 

[RustyRatRod]

I like a hydraulic roller version of the MP 528 cam for that.

 

[Hellrats]

The Best Damn "3/4 Race Camshaft"

 

[Illahe]

I like a hydraulic roller version of the MP 528 cam for that.

4” arm needs some “dwell” to take advantage of cylnder fill. 246/254 SFT with.550 lift on 110lsa worked well in my 10.7:1 360 with 318B cylnder heads.

 

[MOPAROFFICIAL]

We are going to build a 408 street smallblock, 3.73 gears fourspeed, 10/1 compression, probably an airgap dual plane, heads yet to be determined, although if I can find a decent set, 318b aftermarket iron , or better. The goal is a motor that will idle with a little lump, pull between 10 to 14 inch vacuum, have excellent torque for street driving and some gas mileage (10?,12?) and maybe a power peak of 5200 to 5600? My WAG is something in the mid 220 range at .050, intake, another 6 to 10 degrees on exhaust, with an lsa in the 110 range? What have you run, and did it meet the goals i am after?

You can get a Lot more power and a lot more RPM than that with an expectation like 10 to 14 inches of vacuum and 10-12 mpg

 

[Garrett Ellison]

This looks pretty good for your intended goals. Just bear in mind that the .530 lift is for 1.5 rockers and 1.6 would deliver a .565 lift rating.
DODGE Howards Cams 718045-09 Howards Cams Rattler Camshafts | Summit Racing

 

[MOPAROFFICIAL]

Min 246@.050, but preferably 248-252@.050 for this application imo.
.550-.580 lift.. 108-109lsa , int 104-106 cl