496 vs 555

[79camaro]

Still on the bench.
In 06 I had to toss the 454 0.30 over in the scrap pile > from the abuse of drag week.

I want to put a new engine together to compete in the 08 drag week.

496 or 555
The 496 makes great toque and with a good set of heads can make around 730 hp on a 10.5 comp.

The 555 or 565 also makes great hp and a larger price tag.
I had talked to a few people said they did not gain much (.2 to .3) at all when the went to the 555.

Need some input from the guys that went from a 496 to a 555.
Thanks for any input

1979 Camaro t400 with brake,3.50 gears 3800 stall 3400 but going on a 200 lb diet.
Looking for high mid 9s :D

[Two Lane Blacktop]

Re: 496 vs 555

What you'd gain would be being able to

achieve your prior bests more readily

with less strain, thus w/more durability.

Durability is usually cheaper in the long run.


Extra cubes allow less radical combos.



(Working on a 4.600 bore/4" stroke BBC today)

[Robert1320]

Re: 496 vs 555

A small motor can still use std 24* heads. A smaller motor can
be easier on a small tire set-up. (less tq)

But a big motor with an MSD digi box can do wonders to tame a wild motor.
509 or 540 will allow a couple of extra passes out of the block.

[joe_rocket45]

Re: 496 vs 555

here's how I see it:

555 - 496 = 59 ci

730 / 496 = 1.471 hp/ci

so 1.471 * 555 = 816 hp

816 -730 = 86 hp
verify:
59 * 1.471 = 86 hp

[79camaro]

Re: 496 vs 555

Thanks for the input

[JeffMcKC]

Re: 496 vs 555

Cubes rule

[seered]

Re: 496 vs 555

Hey 79 camaro My 555 from drag week is for sale and is available as either a short block or complete with EFI or carburetor ready dominator intake. Speak up so we can talk before it goes to another home.
Separate dyno tests have shown 810-860 hp and in my 3600 lb sled went 9.55 with a 400TH and I still have the torque converter if you are interested in a package deal!

[79camaro]

Re: 496 vs 555

Hy Doc just sent you a pm check you mail