Proposed 400 bb build, cam recommendations

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Brooks James

Brooks James

VET, CPT, Huey Medevac Pilot
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Used 30 over forged Pistons , want to get around 9.5 : compression

Reworked LY rods

Edelbrock medium rise dual quad intake
with Carter Competition Series 500 cfm

Cleaned up Port matched 452 heads
Remanufactured 383 forged crank

727 tranny 3500 converter
With reverse manual body

3.91 742 case sure grip

Now the car is set up with 24.5 tires and the 3.91, with ten percent converter slippage should cross the line at 6400

And of course a 200 shot of nitrous

I'm looking at hydraulic flat tappets ....

Don't want a rough idle

Your take ??
 
Yeah RRR, that does sound like a good cam or I would use something that compares to a street hemi grind.
 
Brooks James said:
Used 30 over forged Pistons , want to get around 9.5 : compression

Reworked LY rods

Edelbrock medium rise dual quad intake
with Carter Competition Series 500 cfm

Cleaned up Port matched 452 heads
Remanufactured 383 forged crank

727 tranny 3500 converter
With reverse manual body

3.91 742 case sure grip

Now the car is set up with 24.5 tires and the 3.91, with ten percent converter slippage should cross the line at 6400

And of course a 200 shot of nitrous

I'm looking at hydraulic flat tappets ....

Don't want a rough idle

Your take ??
Click to expand...
If building fresh today, I would definitely invest the $$ and go with a solid lifter setup. Options today are so much better than what was available way back!
 
Brooks James said:
Used 30 over forged Pistons , want to get around 9.5 : compression

Reworked LY rods

Edelbrock medium rise dual quad intake
with Carter Competition Series 500 cfm

Cleaned up Port matched 452 heads
Remanufactured 383 forged crank

727 tranny 3500 converter
With reverse manual body

3.91 742 case sure grip

Now the car is set up with 24.5 tires and the 3.91, with ten percent converter slippage should cross the line at 6400

And of course a 200 shot of nitrous

I'm looking at hydraulic flat tappets ....

Don't want a rough idle

Your take ??
Click to expand...
I think there is a slight problem with your selection of parts here. Your building a big block 400, correct? Then the only dual quad intake I know Edelbrock makes currently is for the 440. Unless you have an older cross ram or OEM intake?
 
If you are running nitrous you want a 112+ LSA, at least 110. That will hurt your cranking compression though, so don't go too crazy on duration. I'd keep it 230-240@.050

One cam that would work, and i've used it many times is the 284/.528/112 MPP cam.
 
I can use this 62 383 383/343 hp

IMG_20220909_192942170_HDR.jpg


IMG_20220909_192730549_HDR.jpg


IMG_20220909_192742889_HDR.jpg
 
I'm just kidding, but not.
If I were you I'd pray to the Lord for guidance & ask him to help you decide :poke:.
I have been though the process you're in trying to make up my mind. That's why I'm poking you with that stick lol. You'll get it, you'll be happy.
Personally I'd go with the 470.
After reading all of Andy F's stuff my mind was made up.
 
roccodart440 said:
If you are running nitrous you want a 112+ LSA, at least 110. That will hurt your cranking compression though, so don't go too crazy on duration. I'd keep it 230-240@.050

One cam that would work, and i've used it many times is the 284/.528/112 MPP cam.
Click to expand...
The cam in my 360 mag adv dur ex 286 Int 274. 512 lift\498 113.5 lsa
 
You can get an honest 1 pound foot per cube from a stock compression 400. That's tire melting torque and will run on regular gas all day long.
 
Brooks James said:
Agree, however I NEED 600 hp !!!
It's the only adrenaline rush I will have anymore
Click to expand...
600 HP with a 400 is going to take like 13-14:1 compression, a big cam, heads that work really well. It won't be street friendly at all.
I should be on the Dyno real soon with my 470.
It's a simple build it should make 600 fairly easy and it might even be somewhat street worthy for (not my car, lol)
 
MOPARMAGA said:
600 HP with a 400 is going to take like 13-14:1 compression, a big cam, heads that work really well. It won't be street friendly at all.
I should be on the Dyno real soon with my 470.
It's a simple build it should make 600 fairly easy and it might even be somewhat street worthy for (not my car, lol)
Click to expand...
Told ally disagree. Let’s do some math…

600 (hp) divided by 400 (CID) = 1.5 HP per cubic inch.

A well thought out engine combination can do this. This is not exactly throw together parts from the bottom of the page. I would certainly invest the biggest chunk of change at cylinder heads!

I would approach this 400 only cube engine like a small block.
The best part being is the aftermarket big block head on s nicer than a small block head. A much higher ceiling of performance.
For a 340/360 @ 1.5 multiplication, it would equal 510/540 hp. A sizable cam it will need but not streetable? Well, that’s a driver/owner issue.

This can be done on 93 pump gas.

Build wisely!
 
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