Cam recommendation

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Brooks James

Brooks James

VET, CPT, Huey Medevac Pilot
FABO Gold Member
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Location
Fruitland Park Fl
Since I’ve retired I have been on finishing my Dart. I’m almost finished
And am into my next project.
A 408 stroker
I’ve decided on most stuff but need recommendations.

360 Magnum block
Scat forged internal kit
Cr at 10.5 to 1
3400 lb car
904 trans
Reverse manual valve body
3500 Converter
3.91 axle
26.5 tires
Single plane intake ???
Either a Thermoquad or 750 dp Holley
MP dizzy
Accel super cool
Dougs full length 1 5/8 headers

I know I will be leaving some horses
On the table with 1 5/8 but I already have them

I want something that will pull hard from 3000-6500, isn’t excessively lumpy cam wise that has decent street manners
I was thinking of
290 duration 550 lift, single pattern
The motor will have 150shot of nitrous

What do you think??
 
Duration @.050? Way too much. My dirt track cam isn't that big and I am building it for 7500 rpm on a paperclip shaped track with long straights.

Call anyone except Comp for a cam recommendation. Good luck finding someone with an available core. My favs are Jones Cams and Howards but I like Crower, too. FABO member "dart19666" works for Crower and you get a FABO discount. PM him.

Buy a good carb not a cheap carb. Lots of Holley knockoffs that are good but some have design flaws that affect idle and low speed operation. Hard to beat an E-brock but I have a hunch that 150 shot will prefer a Holley.

I like the 10.5-1 compression ratio. That's free HP.

Forget the trick cams that make lots of noise... if you have overlap it shoyld be there for a reason not just a cool idle. Those lopey cams are like buying a hooker and thinking all that moaning, groaning and dirty talk is real....
 
A nitrous motor? "Whatever" grind you choose will work best with nitrous on at least a 112 LSA, but probably like 114 better.
 
Somewhere between 244-248 @.050 range considering the convertor you have & I'd say I wouldn't go much over 244, especially with your idle wishes. & 2nd what RRR sez.
 
Krooser said:
Duration @.050? Way too much. My dirt track cam isn't that big and I am building it for 7500 rpm on a paperclip shaped track with long straights.

Call anyone except Comp for a cam recommendation. Good luck finding someone with an available core. My favs are Jones Cams and Howards but I like Crower, too. FABO member "dart19666" works for Crower and you get a FABO discount. PM him.

Buy a good carb not a cheap carb. Lots of Holley knockoffs that are good but some have design flaws that affect idle and low speed operation. Hard to beat an E-brock but I have a hunch that 150 shot will prefer a Holley.

I like the 10.5-1 compression ratio. That's free HP.

Forget the trick cams that make lots of noise... if you have overlap it shoyld be there for a reason not just a cool idle. Those lopey cams are like buying a hooker and thinking all that moaning, groaning and dirty talk is real....
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Agreed no comp, just had to deburr a brand new set of expensive roller lifters since they were scraping the lifter bore. Lol your last sentence
 
MOPARMAGA said:
Agreed no comp, just had to deburr a brand new set of expensive roller lifters since they were scraping the lifter bore. Lol your last sentence
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LOL...your going to see way more crap like that. Get used to it. It’s a rare day when you don’t have to turd buff some aftermarket stuff.
 
What heads are you going to use?
Everyone's amount of rump they can live with is different.. but a good 240-250ish @.050 cam I would think get you the power band you want. There is a lot more to it than just duration though. Might not hurt to get an opinion of a good cam grinder.

My mag block 408 pulls pretty well from 3500-7000. Even at the higher altitude that I live at.
Mag block
Scat rotating assy w/ 5cc pistons
11.75:1 comp
trickflow heads 60cc chambers
comp rockers and lifters
Howards solid roller 257/267@050 .640/.645
950cfm qft brawler
Super victor intake (Victor 340 would probably be a better choice)
1 7/8 headers. The headers made a huge difference, I had 1 5/8 originally and it gained a good amount of power swapping.


48365721_10210432505687804_8485457889027162112_n.jpg
 
Hay yall, he said he wants something "not too lumpy". Somehow I don't think 250 and 260 @ .050 is gonna get him what he wants. lol
 
RustyRatRod said:
Hay yall, he said he wants something "not too lumpy". Somehow I don't think 250 and 260 @ .050 is gonna get him what he wants. lol
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I have 260-264 @ .050 it doesn't want to idle much under 1000 rpm (yet)
Not much lump when it's spinning 1000
 
Maybe he means advertised duration. In the original post he was talking 290 duration. He should just get that Chevy grind 268 duration.
That's probably a 3/4 cam lol
 
fishmens67 said:
Did you ever build this 408?
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No 408 pieces, everything else the same, especially after I viewed a tube video where they stroked to a 408 , everything else the same, and it only produced 34 extra hp ! $2400 plus machining for 34 hp, not for me !
I'll more than make up for it with a shot of nitrous.
 
bench racing? dreaming? good street manners?
240 @50 550 lift 110 lsa 108 rhoads lifters gvod 27 inch tall tires
should get you 11.4 ish@118 and still pull 18 19 mpg on the hi-way
 
Brooks James said:
No 408 pieces, everything else the same, especially after I viewed a tube video where they stroked to a 408 , everything else the same, and it only produced 34 extra hp ! $2400 plus machining for 34 hp, not for me !
I'll more than make up for it with a shot of nitrous.
Click to expand...
With any of the engines you're wanting to build are you planning on it being a driver. I'm guessing because of the nitrous.
 
Brooks James said:
No 408 pieces, everything else the same, especially after I viewed a tube video where they stroked to a 408 , everything else the same, and it only produced 34 extra hp ! $2400 plus machining for 34 hp, not for me !
I'll more than make up for it with a shot of nitrous.
Click to expand...
Was that the hot rod video where they did that with a 5.9 - 408 engine? While the 34 hp gain is not worth the expense for 99.9% of anybody stroking an engine, I myself can’t think of anyone doing what hot rod did. The real win is what is on top of the engine, 340/360 or a 408. The better the (high performance or race) parts on top, the bigger the spread will be over the smaller engine.

I could only use that stock to stroker bottom end and stock top to replace a worn out engine in a work truck that already had a bit of a short coming in hauling the loads it’s expected to do. I guess an example could be a landscaper’s truck. Or truck towing the race car. The extra torque would be most handy.
 
MOPARMAGA said:
With any of the engines you're wanting to build are you planning on it being a driver. I'm guessing because of the nitrous.
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Mostly street, cruise , stoplight to stoplight, etc. The nitrous will be for emergencies, that is if I'm getting beat.
LOL
 
The beauty of srtoking is you get much more avg power from idle to 6k
lots more torque much better streetability
you can shift 5800 trap 6100@118 ish with a 27 tire
engine longevity increased
you dont need 1k bucks in rockers and valvetrain spend that on the nitrous twin stage
turbo and supercharging are always on love the on demand of the juice
more avg power and torque require less gear to be quick
imo
 
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