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08-17-2007, 06:51 AM

#113

SST4530

Senior Member

DYNO TECH

Join Date: Feb 2004

Location: Leonard, Texas

Posts: 414

Quote:

Originally Posted by bjuice

Quote:

Originally Posted by blittle

Quote:

Originally Posted by camaro74454

It's a tough call with the SB's running BB cubes...I'de just go with the 700 750 hp thing and limit it to that.

Right, once you start stroking and having to add anything other than a 23 deg head then nothing is cheap. If you stay within the stock stroke and head configurations and stay under 415 CID then I'll go against BB any day, long as we have HP cap. What I'm saying is I don't think you can build 750 HP BB cheaper than a SB. and even if you did the weight to HP factor comes into play.

Quote:

Originally Posted by bjuice

LOL....bLITTLE i was waiting for someone to come back with that one...i was planning my way around this question 2 days ago with my 1st reply on this post..

the ET 10.'s were brought into the Equation....i came up with the 3400 lb rule cause thats what would take in most street trim cars W/dRIVER....all we did was figured out how much HP it would take to power a 3400 lbs car into the 10.0's....and i think wes came up with 670 hp to the rear wheels...and i calculated 20% loss of HP thru the drive train and chassis which would put close to 840 hp at the crank....before these calculations were posted i used a nice round figure of 900 hp...seems i wasn't too far off...
but i would not hesitate to back this up to 750hp and the BBC chevy still comes out on the better side......making 750 HP on NATURAL ASPIRATED 23 degree SBC is still accomplishing a great feat......i have had some ball busting alumin rod 406's that just made 660 hp 750 hp on a 23 degree motor is very attainable but you would not do it with run of the mill parts and a so so- mechanic......my experience owning and spectating..

here is Wes finding he posted a few pages back.....i promise i didn't load up the Contest before the debate started..it only seems that way becuase a BBC makes so much more HP....lol....

Brian I show to get 670hp @ the rear wheel on 10.00 ET w/ 136 mph in a 3400# 69 Camaro.

You'll never here me say a SB is capable more power than a BB. I've owned BB's though and I'm still not convenced that working within a specific budget, HP range, and remaining normally asparated that a BB is cheaper to build. The parts for BB alone are about a 1/3 again higher than SB stuff. You loose a tenth right out of the gate just with the additional wieght, did you factor in how many ponies it takes to make up that 10th. You have to be careful where the cutoff point is because as you said making 750 on a 23 deg SB is obtainable, anything over that will require a big jump to at least 18 deg valve train and the cost sky rockets from there. You can always make more power with a BB just becuase it's a bigger pump and has more room to expand even bigger. It's just not cost effective below a certain range.

Also when we start talking about making a car run in the 10's, which is not that difficult. There are many more things that come into play than just HP. I've seen guys with much more engine than me and they just can't get them down the track, either poor tuneup, mismatched parts or suspension setup.

My 3500 LB.(with driver) camaro is a prime example of a 23 deg. SB running low 10's (best et around 9.90 with really good air) I gaurantee I can't build a BB that will run with it for the same money and that's with me doing all the assembly, the only stuff I sub out is machine work. Put this in your benchtop dyno and see what you come up with, never use that stuff myself.

Here are my basic components, no secrets or exotic parts all off the shelf stuff:

GM 400 4 bolt main block .040 over w/filler
5.7 eagle H beam rods
Ross 14.1 pistons
C&A zero gap rings
Cola 3.75 forged crank .002 under / externally balanced
AFR 227 23 deg. 2.100/1.60 CNC race ported heads (some additional port work done by me)
Super Victor Intake (some additional port work)
Holley 1000 HP Carb
Fluidamper balancer
Herbert 635 roller on 106 LC
MSD billet dist
1.875 Hookers
Harland Sharp 1.5 Roller Rockers
.100 long push rods
7 qt. moroso pan

Now as was mentioned before, many things go into getting this sled down the track, everything has to work together. We could each have the same engine and get different results from them just because of mechanical or tuning ability.

_________________
Wesley

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