OT Intake comparison for EFI guys
Thread Starter
Race Director
Joined: Mar 2001
Posts: 11,322
Likes: 1
From: Living in the Hartland
OT Intake comparison for EFI guys
Not sure if you guys caught this or not but on another board I found this post:
http://www.thirdgen.org/techbb2/show...hreadid=273727
Interesting thing to me was the stock TPI #'s, 410 hp and 500 torq out of the 383
, might have been even better with a diff cam.
http://www.thirdgen.org/techbb2/show...hreadid=273727
Interesting thing to me was the stock TPI #'s, 410 hp and 500 torq out of the 383
, might have been even better with a diff cam.
Melting Slicks
Joined: May 2001
Posts: 2,131
Likes: 4
From: May help you? You can sure as hell try!
Didn't read the article but one of the big advantages of EFI (port injection, not CFI) over a carb is the use of a "dry" intake. While the carb requires a manifold that keeps the fuel in suspension in the air flow, this isn't a constraint for EFI. This enables the EFI manifold designer to better tune his manifold to make torque at a low or high RPM and not have to worry about the fuel wetting of the manifold and air-fuel distribution problems. The TPI has very long runners for low end torque that would be a disaster if carburated. EFI also enables the use of larger cams, more overlap, etc. because it doesn't rely on a vacuum signal to meter fuel like a carb. Also, by the very design of the carb it imposes a restriction to airflow which is necessary to meter the fuel flow. It relies on pressure drop to pull the fuel into the air-flow. EFI intake systems can be designed to have very low intake losses by eliminating this restriction.
I still like the "looks" of carbs underhood more than an EFI system, though.
I still like the "looks" of carbs underhood more than an EFI system, though.
Melting Slicks
Joined: Nov 2003
Posts: 2,668
Likes: 119
From: St. Charles Mo
CI 5 & 8 Veteran
Originally Posted by LemansBlue68
I still like the "looks" of carbs underhood more than an EFI system, though.
Bullshark
Melting Slicks
Joined: Nov 2002
Posts: 2,231
Likes: 7
From: Fort Pierce Florida
Wow, that makes me pretty good about going with the SuperRam/383 combo I put in my Vette. I saw also in a magazine that Scoggin Dickey was offering a 383 topped with the SuperRam intake and a fixed Accel computer (so it's a bolt-in with no programming required)
Thread Starter
Race Director
Joined: Mar 2001
Posts: 11,322
Likes: 1
From: Living in the Hartland
Ya that super ram made some super torq, I got a HSR in my Formula now and it rocks for $, I have had a LT1 retro fit intake and stock tpi on the same eng and the HSR is the best all around of the 3.
Le Mans Master
Joined: Aug 2003
Posts: 7,720
Likes: 12
From: Chattanooga TN
Originally Posted by LemansBlue68
I still like the "looks" of carbs underhood more than an EFI system, though.
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