408 Stroker Cam Recommendations

[matt030305]

Hey all, I am currently building a 360 magnum to a 408 Stroker and I need a cam for it. My target is 500hp/500+tq and has to be streetable as I intend on driving it a good amount once it starts to warm up. It’s going in a 71 duster with 3.23 gears, stock converter (will be upgrading to something more radical before engine is put back in the car) and a 727TF. Here are the parts I have so far:

-01 magnum block
-Hughes 360 girdle (w/ARP main studs)
-scat 4340 forged 4.00” crank
-scat 4340 I-beam rods with ARP bolts
-icon forged dish pistons (~10.5 CR with 60cc heads)
-Trickflow 190cc heads (TFS-61417802-C00)
-cometic head gaskets
-Harland sharp 1.6 ratio roller rockers made for magnum blocks (pushrod oiling)
-edelbrock RPM air gap (non ported)
-Holley 850 brawler with electric choke and mechanical secondaries

All I really need now is a cam and oil pan to meet the goal for this build. Any input or recommendations would be helpful. Thank you!

 

[Jersey Devil]

Hey all, I am currently building a 360 magnum to a 408 Stroker and I need a cam for it. My target is 500hp/500+tq and has to be streetable as I intend on driving it a good amount once it starts to warm up. It’s going in a 71 duster with 3.23 gears, stock converter (will be upgrading to something more radical before engine is put back in the car) and a 727TF. Here are the parts I have so far:

-01 magnum block
-Hughes 360 girdle (w/ARP main studs)
-scat 4340 forged 4.00” crank
-scat 4340 I-beam rods with ARP bolts
-icon forged dish pistons (~10.5 CR with 60cc heads)
-Trickflow 190cc heads (TFS-61417802-C00)
-cometic head gaskets
-Harland sharp 1.6 ratio roller rockers made for magnum blocks (pushrod oiling)
-edelbrock RPM air gap (non ported)
-Holley 850 brawler with electric choke and mechanical secondaries

All I really need now is a cam and oil pan to meet the goal for this build. Any input or recommendations would be helpful. Thank you!

Hey, there are plenty of 408 build threads on here for Carburated setups. Pretty much anything will get you 500 ft-lbs of torque.

I think most people will be concerned about the torque converter and possibly rear gears.

You didn't say what type of cam you were looking for.. Hyd. Flat, solid flat, hyd. Roller or solid roller. There can be a wide range in price, but it looks like you want a roller.

Hydraulic roller wise.. The Lunati's 20200712 hyd roller ( 231/239 @ 0.050 110lsa .571/.587 with 1.6rr.) is the smallest cam that I have seen that broke 500hp on the dyno.

Your extact setup, but with a smaller 780cfm carb. Made 507hp@5,800rpm abd 546 lb-ft@4,200 rpms. At the lowest rpm of the dyno run it made 512 lb-ft @3,400 rpms. Only after 5,275rpm did it ever drop below 500lb-ft. It was still making 471.5hp@6,200 rpms at the end of the run. It averaged 512 lb-ft between 3,500<6,000rpms.

Could probably make 500hp with even a slightly smaller solid roller if you wanted. I don't have or seen dyno results for solid roller cams that small.

 

[matt030305]

I am looking for hydraulic roller setup since my block comes stock with roller lifters in it. I plan on putting a higher stall torque converter in it along 3.55s (until I can afford a tkx swap)

 

[matt030305]

Hey, there are plenty of 408 build threads on here for Carburated setups. Pretty much anything will get you 500 ft-lbs of torque.

I think most people will be concerned about the torque converter and possibly rear gears.

You didn't say what type of cam you were looking for.. Hyd. Flat, solid flat, hyd. Roller or solid roller. There can be a wide range in price, but it looks like you want a roller.

Hydraulic roller wise.. The Lunati's 20200712 hyd roller ( 231/239 @ 0.050 110lsa .571/.587 with 1.6rr.) is the smallest cam that I have seen that broke 500hp on the dyno.

Your extact setup, but with a smaller 780cfm carb. Made 507hp@5,800rpm abd 546 lb-ft@4,200 rpms. At the lowest rpm of the dyno run it made 512 lb-ft @3,400 rpms. Only after 5,275rpm did it ever drop below 500lb-ft. It was still making 471.5hp@6,200 rpms at the end of the run. It averaged 512 lb-ft between 3,500<6,000rpms.

Could probably make 500hp with even a slightly smaller solid roller if you wanted. I don't have or seen dyno results for solid roller cams that small.

This really helped! Another issue I’m having with trying to pick out a cam is what’s in stock at the moment. A lot of cams have been discontinued or out of production. I’m going to try and find something similar to that spec or maybe even a little more radical just to squeeze more power out of my engine.

 

[Jersey Devil]

There is a similar thread already started a few days ago. Alot of information on it.

Cam Upgrade for my 408. Need some advice.

Post# 21, I list the hydraulic rollers that are available from Most cam companies slightly larger and up in that post with their specs.

I'm on here trying to find a hydraulic roller cam for a stroked 5.2 magnum, but power brakes is a must for me. I have dyno results for the 236/242 comp cam and 243/251 Lunati. Also have links to the dyno runs.

 

[Dart Frog]

I would consider this a contender

 

[4mulas]

If you planning all of it I might suggest the change of 3.23 to 3.55 is hardly worth it. Might consider 3.73?