1000hp Sbc Vs 1000 Hp Bbc, Which One Would You Go With?

[hannes_slanec]

1000HP SBC VS 1000 HP BBC, WHICH WOULD YOU GO WITH?


Hello, currently I am about to build a 540cid standart deck BBC that soon is planed to run twin turbos.

My goal was around 3,5sec for 0-60 on the street with street radials and I was thinking 1000HP will be my need for that accerlation.

About the car

68 Impala SS427 clone

ca 1800kg

All heavy things are rear mounted at the backest possible point like bat, radiator (I saw that by the rally cars), soundsystem and so on

Car get a narrowd 9" for wider tires like 315 or even 345 and of course a posi differenzial.

I run Dart aluminum heads and want to go with a alu-engine too to lose some more weight on the front wheels
I also plan to go some inches back with the engine as far as possible.

4-link will be optimized


Now, I saw that Tom Nelson cranks 800HP out of a 427 SBC!!! and before I thought of course that guy know about hard valve springs, hottest cams and will go with race fuel to avoid detonation if he boosts the hell out of the block, but in one of the latest videos he stated that he got now a 427 SBC cranking out 1100HP Shocked
totally streetable on 91Okt on only 6 ****ing PSI which is the lowest performance on that engine



Seems like some more PSI and that engine is makeing 1500HP easily I think.

Of course I start wondering why the hell do I build a BBC for twice the money if a SBC is as strong as a BBC as well.


What is your members opinion about that competition, ok some of you will say the answer is, after the SBC is making 1100 now the stroker BBC will push out 1800-2000 but I think I will not get that much power on the streets, dont forget it is a street car and where I live we cannot drive Hoosier or M/T drag tires on the street.

Is there any speed/ or RPM range where it is a difference between 1000HP or 1500 or 1800HP when using the car on the street or will the HP always go out in nothing else than tire smoke?

Is there any benefit in the comparism between 1000HP SBC and 1000HP BBC, maybe the better low end torque would help by a car that is a bit heavier like my 1800kg Impala.

I have to say in that 69 Camaro 427 twin turbo video I realized that Tom always goes up to 4000RPM before he makes the kick down, maybe that would be different with a BBC

A crazy detai is that since new more and more mebers boost Big Blocks, I read every day things like 454TT, 502TT, 509 TT, 540 TT so a lot of people want to go that way now but maybe the most of them are drag racers and do not use ther cars on the street (maybe) but like that some fellas do the same now.

Tell me what you think, maybe I change to an SBC although I am proud of my stroker BBC


Thanks Hannes