Thread: sbc 400

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how much hp u all thank ill make with this combo
400 bored 30
speedpro powerforged piston flattops 4-relief
stock rods arp rod bolts
scat crank
howard roller soild cam .582/.582 adv.246/246
chevy bowtie aluminum heads 190cc 64cc mid port and polish job
1.5 comp pro magnum roller rockers
victor jr intake with a 780 holley double pumper

c.r. 11.7:1
Not enough cam. Need another 10-12 degrees duration. Operating range 4,000 to 7,000.
Need better rods, steel crank, race converter, good fuel.
Not enough head.
Maybe someone with a software dyno can help you.

This one needs at least 210cc heads .

could any one help or tell me about how much hp i will be makin with the combo i have

I pluged you info into the Cam quest . I went with 11.5.1 C/R But your engine is higher . And found a cam that was a near match to yours . This is what it came up with 569.8 HP at 6000 RPM and 574.9 ft lbs of Torque at 4500 RPM . I think the heads you are running will hold back some of this HP . I would say that engine may go 525 HP and 510 ft lbs of Torque . It is a hard one to call

Thanks Alot Im Going To See About Gettin More Heads What Size Heads Do I Need

Will the rods even support that????

The engine shop that re-sizes and install ARP bolts on my stock SB Rods . Said they are good for 7200 RPM . Dont tell him I took one of my 350s to 8000 RPMs Sounds Like this 406 will max at 6400 RPMs with the 190cc heads .

i dont plan on taken it to nothing but 6000 i got a chip to go in my msd box

Learn something new, I never would of thunk stock rods could support 569.8 HP and 574.9 ft lbs of Torque and not fail.

Originally Posted by BigTruckDriver

Learn something new, I never would of thunk stock rods could support 569.8 HP and 574.9 ft lbs of Torque and not fail.

They will for a short time.
What is a short time??
Do you like rod widows???
That is the question.

I don't think it will hit 569 hp anyway.

It will be a stump puller. If you go bigger heads, RPM will go higher than the intended 6000. Open the bowls on the heads or run race gas. Or E85 if available

ok i had the bowls hog out and a mid port an polish job

Originally Posted by BigTruckDriver

Learn something new, I never would of thunk stock rods could support 569.8 HP and 574.9 ft lbs of Torque and not fail.

Man I bet this 406 would push your Vega real good down the 1/8th mile

Originally Posted by tango

Man I bet this 406 would push your Vega real good down the 1/8th mile

A couple times anyways