93 octane and a BBC engine
7 Second Club
iTrader: (5)
Joined: Nov 2001
Posts: 8,834
Likes: 1
From: Gainesville, Florida # of drag strips runs: ?!?!?
pump gas doesn't care about what motor it goes in, just the compression ratio and heads. I think the rules are pretty close to same on what normal allowable limits are for pmup gas for compression ratio and such...
Thread Starter
TECH Veteran
Joined: Dec 2001
Posts: 4,117
Likes: 0
From: Ft. Lauderdale, FL, USA
Originally Posted by Villain281H
pump gas doesn't care about what motor it goes in, just the compression ratio and heads. I think the rules are pretty close to same on what normal allowable limits are for pmup gas for compression ratio and such...
Last edited by Quickin; Jan 26, 2006 at 11:01 PM.
Trending Topics
Thread Starter
TECH Veteran
Joined: Dec 2001
Posts: 4,117
Likes: 0
From: Ft. Lauderdale, FL, USA
Originally Posted by jshiver
I think the BBC would get you more "grunt"
Right?
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo Thread Starter
TECH Veteran
Joined: Dec 2001
Posts: 4,117
Likes: 0
From: Ft. Lauderdale, FL, USA
572 GM crate engine.....9:1 compression.........620 fwhp
My 436 small block....11.3:1 compression..........about the same fwhp ~620
I can only conclude from this that more cubes means a whole lot more than compression does. But than I get confused again because all GM does to that same 572 crate engine to make 720 hp is send it out with 12:1 compression.
My 436 small block....11.3:1 compression..........about the same fwhp ~620
I can only conclude from this that more cubes means a whole lot more than compression does. But than I get confused again because all GM does to that same 572 crate engine to make 720 hp is send it out with 12:1 compression.
Thread Starter
TECH Veteran
Joined: Dec 2001
Posts: 4,117
Likes: 0
From: Ft. Lauderdale, FL, USA
So, the question still remains.
Why would a BBC make more power than a SBC with the same octane. LSx engines need C16 race gas to make 550-600 HP if a small 348 or 383 is used, but a BBC can make 1,000 HP easily on 93 octane. And from what I was told by the builder of that 1,000 HP BBC is that it can make a WHOLE LOT more on pump gas with bigger heads and a bigger Procharger.
Also, that 1,000 HP BBC making 1,000 HP has a small Procharger on it already.
Why would a BBC make more power than a SBC with the same octane. LSx engines need C16 race gas to make 550-600 HP if a small 348 or 383 is used, but a BBC can make 1,000 HP easily on 93 octane. And from what I was told by the builder of that 1,000 HP BBC is that it can make a WHOLE LOT more on pump gas with bigger heads and a bigger Procharger.
Also, that 1,000 HP BBC making 1,000 HP has a small Procharger on it already.
It is Black Magic....In my experience, Big Blocks have always had a better torque curve and seem to make power easier. I have no doubt that you can make a small block (the same c.i.d)make the same power numbers...But, it will be own up in the rpm range...Big Blocks don't turn up high rpms as well as small blocks. Just my thoughts
Thread Starter
TECH Veteran
Joined: Dec 2001
Posts: 4,117
Likes: 0
From: Ft. Lauderdale, FL, USA
Originally Posted by jshiver
It is Black Magic....In my experience, Big Blocks have always had a better torque curve and seem to make power easier. I have no doubt that you can make a small block (the same c.i.d)make the same power numbers...But, it will be own up in the rpm range...Big Blocks don't turn up high rpms as well as small blocks. Just my thoughts
.
7 Second Club
iTrader: (5)
Joined: Nov 2001
Posts: 8,834
Likes: 1
From: Gainesville, Florida # of drag strips runs: ?!?!?
there have a few big block vs small block build ups on same cubes, compression, cam #s etc. Big block makes more power and torque, but the added weight offsets that somewhat, but the big block usually is faster by a tenth or so.
I disagree on the small block needing race gas to do anything worth talking about. a 427 small block making 600 ponies on pump gas is slow?
Derek
I disagree on the small block needing race gas to do anything worth talking about. a 427 small block making 600 ponies on pump gas is slow?
Derek
the mags dont the same displacement comparison and as allready stated the big block made more power but at the expense of around 150 more lbs.it is obvious a much larger engine will move more air than a smaller one so the 572 will easily out-pace the sbc.
Thread Starter
TECH Veteran
Joined: Dec 2001
Posts: 4,117
Likes: 0
From: Ft. Lauderdale, FL, USA
Originally Posted by Villain281H
I disagree on the small block needing race gas to do anything worth talking about. a 427 small block making 600 ponies on pump gas is slow?
Derek
.
Two days ago I stopped by Fowler Racing Engines to gather information about my upcoming engine build. I mentioned that my main goal is to reach the 500 hp point. I mentioned that I was planning on just building a SBC and would like to run pump gas. I was informed that might be pretty much not possible out of a SBC even a stroker setup. He mentioned that the reliability would be the main issue. I'm nixing the SBC and going with a BBC as he mentioned that it will be more achievable and reliable. Not to mention that the cost would most likely be lower.
Thread Starter
TECH Veteran
Joined: Dec 2001
Posts: 4,117
Likes: 0
From: Ft. Lauderdale, FL, USA
Originally Posted by TimTaylor75
Two days ago I stopped by Fowler Racing Engines to gather information about my upcoming engine build. I mentioned that my main goal is to reach the 500 hp point. I mentioned that I was planning on just building a SBC and would like to run pump gas. I was informed that might be pretty much not possible out of a SBC even a stroker setup. He mentioned that the reliability would be the main issue. I'm nixing the SBC and going with a BBC as he mentioned that it will be more achievable and reliable. Not to mention that the cost would most likely be lower.
I have a small block, its a 436 stroker. It makes 600 hp and it idles just like a stock, factory car. 93 octane. It's almost 2 years old and its running like the first day it started up. So its ridiculously reliable.
Maybe you misunderstood them about NOT being able to make 500 hp with a small block, because its been done to death. 700 hp is doable with pretty nice idle quality and still good reliability.
The only thing I agree with is that a big block making 500 hp as opposed to a small block making 500 hp is: The BB just won't be working as hard. But 500 hp is basically a joke for either engine these days. As I said, my engine is very very very mild, and I make 600 hp. Only thin I had to do to it in the past ~2 years is change the oil, air filter and spark plugs.