Carburation vs. EFI
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From: Goochland, Va.
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From: Engineerland
Its a 440 thats bored .040" over. Its nothing super exotic it just makes a PILE of tq everywhere. The manual trans and the aggressive clutch are why it breaks stuff, next years plan includes a tko-600 and some low gears. Its in a 69 super bee and covered with an original 6 pack hood, gives people a shock when we yank the hood at the track, or meets.
Last edited by WS6T3RROR; Oct 25, 2007 at 03:09 PM.
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From: LA (lower Alabama)
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This is a good read....
http://www.dragracingonline.com/tech...6-sonny-1.html
"To this point I've never had an EFI system on one of my engines make as much horsepower as we can make using carburetors. EFI engines generally make about 20 horsepower less and about the same torque," Sonny stated. "But I'll tell you this, an EFI motor that makes within 20 horsepower of a carbureted motor will put a race car down the track quicker than the carbureted motor."
"What we found was that using EFI induction any engine accelerates quicker than it does with carburetors. It's especially noticeable on the gear change. The engine has no hesitation on the gear change and as a result we saw consistently better ETs with EFI,"
- Sonny Leonard
That's in a situation where you don't have a flow advantage like what Rich mentions, two Pro Stock Dominators can flow what two big 4bbl TB's can move. Plus the intakes are setup for that wet flow. A EFI sheetmetal intake can do some other things when not worrying about wet flow into the runner. When you go from a 900cfm 4150 to a 90mm LS throttle body you easy find HP in lowering the plenum vacuum that much.
As for the
I'm not a fan. I just finished a Super Mod cam where they run those intakes with alcohol and you could definately do better. They have to run those and a Retangular port BBC head on a 470cube BBC so what do you want. The DIRT BBC motors have a lot more potential in them but still have to run a cast single plane. Either way mechanical fuel injecton doesn't hold a candle to modern EFI systems we use today.
Hell here is a good thread about the first LSX powered digger...
http://www.hardcorels1.com/vbulletin...=6406#post6406
Went EFI instead of Carb on a single plane for a lot of reasons.
Bret
http://www.dragracingonline.com/tech...6-sonny-1.html
"To this point I've never had an EFI system on one of my engines make as much horsepower as we can make using carburetors. EFI engines generally make about 20 horsepower less and about the same torque," Sonny stated. "But I'll tell you this, an EFI motor that makes within 20 horsepower of a carbureted motor will put a race car down the track quicker than the carbureted motor."
"What we found was that using EFI induction any engine accelerates quicker than it does with carburetors. It's especially noticeable on the gear change. The engine has no hesitation on the gear change and as a result we saw consistently better ETs with EFI,"
- Sonny Leonard
That's in a situation where you don't have a flow advantage like what Rich mentions, two Pro Stock Dominators can flow what two big 4bbl TB's can move. Plus the intakes are setup for that wet flow. A EFI sheetmetal intake can do some other things when not worrying about wet flow into the runner. When you go from a 900cfm 4150 to a 90mm LS throttle body you easy find HP in lowering the plenum vacuum that much.
As for the
I'm not a fan. I just finished a Super Mod cam where they run those intakes with alcohol and you could definately do better. They have to run those and a Retangular port BBC head on a 470cube BBC so what do you want. The DIRT BBC motors have a lot more potential in them but still have to run a cast single plane. Either way mechanical fuel injecton doesn't hold a candle to modern EFI systems we use today.
Hell here is a good thread about the first LSX powered digger...
http://www.hardcorels1.com/vbulletin...=6406#post6406
Went EFI instead of Carb on a single plane for a lot of reasons.
Bret
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From: Goochland, Va.
Good read, and pretty interesting..........I have a hard time understanding how though. Is it the midrange power and the way it makes power?
LR the S-10 looks pretty nasty.