Solid Roller camshaft selection those of you running a 408 race application - lobe seperation

[TT5.9mag]

More torque, more power. You are correct that’s why I went with Billet Specialty, so I can move on. Every cam company has their opinion, but Billet has a great reputation.

I think you mean Bullet and yea they’re pretty good. At this point you’re going to be moving power around more than making a bunch more. That engine has a pretty healthy cam in it already and I’d be surprised if there was a bunch more to gain. You said you’re ordering a converter also, I think that’s a good move but be careful changing too many variables at once you’ll never know which one did what. I’ve got a bunch of good photos of that car from vegas.

 

[rslscobra]

I think you mean Bullet and yea they’re pretty good. At this point you’re going to be moving power around more than making a bunch more. That engine has a pretty healthy cam in it already and I’d be surprised if there was a bunch more to gain. You said you’re ordering a converter also, I think that’s a good move but be careful changing too many variables at once you’ll never know which one did what. I’ve got a bunch of good photos of that car from vegas.
View attachment 1716341023

Sorry, you are correct Bullet not Billet. Getting a cam not rims! Ty

 

[rumblefish360]

Good move to go with Bullet.

Well…….. you mean besides the 509 purple shaft

What?!?! You mean that cam doesn’t do it all?
Abhhhhhh CRUD!

 

[HuntedDuckV351]

Looking to install a new camshaft in my 408. Trickflow heads cnc ported, molnar crank/rods/icon pistons 12.25 to 1. Current cam 287/301 660/660 lift with a 108 lobe seperation at .050 254/268 and .440/.440
3350lbs Duster with 430gear and 29” tall tire.

Curious what everyone is running and which lobe seperation they find or found works best.

Thank you

My car weights 3200 and my cam is .660/.660 on a 108 but my duration at .050 is 268/274. Been 10.03 with my eddys

 

[rslscobra]

My car weights 3200 and my cam is .660/.660 on a 108 but my duration at .050 is 268/274. Been 10.03 with my eddys

View attachment 1716341075

Thank you! Those Duration numbers are the exact ones recommended by Bullet Cams with a 108 center line and 104 LSA. I am still waiting to hear back from Racer Brown. What converter are you running?

 

[360duster]

did you mix up the LSA and ICL numbers?

 

[HuntedDuckV351]

Thank you! Those Duration numbers are the exact ones recommended by Bullet Cams with a 108 center line and 104 LSA. I am still waiting to hear back from Racer Brown. What converter are you running?

Mine is from bullet as well.

 

[73smallblock]

Did the car run 10.4 with the converter that's in it? I had lent Bill a converter and he ran it for a while. I don't remember what it ran with his converter after he had it adjusted. I also always thought that with a 29" tire that he should have a 4.56 gear in that car.

Glad that someone who's going it race and keep working on the car bought it. Are you going to just race the car or try and drive it on the street also?

 

[rslscobra]

Did the car run 10.4 with the converter that's in it? I had lent Bill a converter and he ran it for a while. I don't remember what it ran with his converter after he had it adjusted. I also always thought that with a 29" tire that he should have a 4.56 gear in that car.

Glad that someone who's going it race and keep working on the car bought it. Are you going to just race the car or try and drive it on the street also?

Yes, and I was going to get the same converter you have from Turbo Actions. I will drive it on the street occasional too.

 

[73smallblock]

Yes, and I was going to get the same converter you have from Turbo Actions. I will drive it on the street occasional too.

Good deal. Please keep a posting about the car. There are many members here who followed along with the build and I'm sure would love to keep seeing the progress. My car is similar to what Fred had but smaller cam and stock trickflow's. You may also want to move this to the racers forum or start a thread there.

 

[rslscobra]

Good deal. Please keep a posting about the car. There are many members here who followed along with the build and I'm sure would love to keep seeing the progress. My car is similar to what Fred had but smaller cam and stock trickflow's. You may also want to move this to the racers forum or start a thread there.

Will do….its actually off to paint now. I’ll get some pics!

 

[Sterling]

I have a very similar setup, 360 block, Molnar crank and Trick Flow heads. It has a Bullet roller cam, I will have to check the specs. Have not raced it yet

 

[Garrett Ellison]

I also always thought that with a 29" tire that he should have a 4.56 gear in that car.

Absolutely… With 4.56 or 4.88 gears, you'd be getting cam recommendations more into the mid 270’s @.050 duration and between 300 to 310 degrees of seat duration. But that would also shift the power delivery toward a whole lot more track and a whole lot less street.

 

[73smallblock]

Absolutely… With 4.56 or 4.88 gears, you'd be getting cam recommendations more into the mid 270’s @.050 duration and between 300 to 310 degrees of seat duration. But that would also shift the power delivery toward a whole lot more track and a whole lot less street.

Totally agree. That's why I asked what his intentions were. Trying to do the best for both worlds.

 

[Demonx2]

The avatar's 408 has a Bullet SFT cam. 251/255 @.050, roughly .560" lift on a 108 LSA. CR of 10.5. I'm slower than other's cars on [email protected]. Likely about 3350#'s race weight. ATI 8" converter stalls right at 5000. Footbrake car.

I've posted before that if I do it again, I'll add at least 10 deg duration at .050. "Strokers eat duration" is my motto!

 

[Sterling]

I didn’t see my cam card, but I did find my notes on the cam. Mike at B3 did the work on the engine, and the rocker arm geometry. It is a Bullet roller cam. Duration @.050- I 274 E 280, lobe lift .440, Separation 109, degree 108. Mike worked excessively on the geometry and getting the most lift. If you check your lift at the valve, you might be surprised.

 

[rumblefish360]

That’s my focus. What, or really where that valve is lifting too. It can be a PIA sometimes. But I purchased the cam with *** listed lift and I try very hard to get that last .001 and everything set right.

The low lift hyd cams aren’t really a worry. Mechanical mid and high lift cams really need the focus.

 

[rslscobra]

I didn’t see my cam card, but I did find my notes on the cam. Mike at B3 did the work on the engine, and the rocker arm geometry. It is a Bullet roller cam. Duration @.050- I 274 E 280, lobe lift .440, Separation 109, degree 108. Mike worked excessively on the geometry and getting the most lift. If you check your lift at the valve, you might be surprised.

Thank you…what’s your compression…and what converter stall you running

 

[Sterling]

Compression is 12.2 to 1 , and I have a 904 installed in the car now with a Dynamic 8” converter . Supposed to stall at 5000, I will find out eventually. My 340 was supposed to launch at 5300, shift at 7200 and go through the traps at 7500. Won’t buzz the 360 as high. I built the car for a 904 or powerglide, but trying the 904 first.

 

[B3422w5]

Looking to install a new camshaft in my 408. Trickflow heads cnc ported, molnar crank/rods/icon pistons 12.25 to 1. Current cam 287/301 660/660 lift with a 108 lobe seperation at .050 254/268 and .440/.440
3350lbs Duster with 430gear and 29” tall tire.

Curious what everyone is running and which lobe seperation they find or found works best.

Thank you

If I were to change to a roller( likely won’t) I would use the same cam several others on here have ran, with similar combo you have( except bloomer heads) it makes excellent power. Proven results.

Crower 31409
106 lsa
268/274@50
645/623 with 1.5 rockers

 

[rslscobra]

If I were to change to a roller( likely won’t) I would use the same cam several others on here have ran, with similar combo you have( except bloomer heads) it makes excellent power. Proven results.

Crower 31409
106 lsa
268/274@50
645/623 with 1.5 rockers

My current cam is a solid roller and the new one will be as well. Ordered one from Bullet Cams and new converter from Turbo Action.

 

[rumblefish360]

That cam ^^^^^^

Mopar Mechanical Roller Camshaft

 

[B3422w5]

That cam ^^^^^^

Mopar Mechanical Roller Camshaft

Yes sir, that be the one.

 

[rslscobra]

Ok guys....I am a Ford guy turned Mopar....But what are Boomie Heads?

 

[rslscobra]

I can see needing more camshaft if the goal is for the engine to rpm higher. Did you have the heads flowed after installing the 2.08 intake valves and how much lift will your valve springs support?

I purchased new PAC springs. They will be 275 seat pressure and 800 open with a 2" install height. My current ones where 240 and 600 at 2" install height.