EFI Question
Thread Starter
Racer
Joined: Jul 2003
Posts: 282
Likes: 52
From: Lima Oh
EFI Question
I'm the proud owner of two vettes, a 64 365hp vert and a 69 L71 vert.
In October, I purchased a 70 Chevelle SS, which was originally a 396. It's now got a 454 with a Speed Demon 850 carb, Edelbrock Airgap RPM intake, and Patriot aluminum heads. I've got a dyno sheet from the previous owner, and it produces 560 hp. Also has a Tremac 5 speed.
Now that spring is finally here, Iv'e been able to drive it some and it's a true beast that can't pass a gas pump.
I'm thinking of putting on an EFI, either Holley or Fitech. I'm looking for easier starting, and possibly better fuel economy.
I've been hanging around here for many years, and don't belong to any Chevelle forums. Always got good advice and thought I'd get some opinions before I go shopping.
Thanks
Ken
In October, I purchased a 70 Chevelle SS, which was originally a 396. It's now got a 454 with a Speed Demon 850 carb, Edelbrock Airgap RPM intake, and Patriot aluminum heads. I've got a dyno sheet from the previous owner, and it produces 560 hp. Also has a Tremac 5 speed.
Now that spring is finally here, Iv'e been able to drive it some and it's a true beast that can't pass a gas pump.
I'm thinking of putting on an EFI, either Holley or Fitech. I'm looking for easier starting, and possibly better fuel economy.
I've been hanging around here for many years, and don't belong to any Chevelle forums. Always got good advice and thought I'd get some opinions before I go shopping.
Thanks
Ken
Race Director
Joined: Dec 1999
Posts: 19,610
Likes: 778
From: Forked River NJ
The fuel injection will provide better driveability but as far as fuel economy don't expect a huge increase unless the carb is tuned poorly. That being said both my cars have fuel injection and I would not go back to a carb. Fuel injection provides much better overall performance than a carb.
Drifting
Joined: Mar 2011
Posts: 1,347
Likes: 121
From: Kernersville NC
Holley Sniper has been getting a lot of good reviews and comments. As always there are a few that have not gone as planned. Redcruz1120 has a good post on his Sniper installation. He used a regulator at the tank with only a short return line which made plumbing easy. Holley makes a regulator/filter specifically for this application and an LS version is available for a little less $.
Thread Starter
Racer
Joined: Jul 2003
Posts: 282
Likes: 52
From: Lima Oh
Thread Starter
Racer
Joined: Jul 2003
Posts: 282
Likes: 52
From: Lima Oh
Holley Sniper has been getting a lot of good reviews and comments. As always there are a few that have not gone as planned. Redcruz1120 has a good post on his Sniper installation. He used a regulator at the tank with only a short return line which made plumbing easy. Holley makes a regulator/filter specifically for this application and an LS version is available for a little less $.
Ken
Race Director
Joined: Apr 2009
Posts: 19,294
Likes: 2,754
From: Charlotte NC
But...I guess you bought this car due to it can tear of the pavement?...or was it for other reasons. Not that it really matters...but if you bought the car because how beautiful it is and the true horsepower...then living with how much it likes gas is what it is.
I know you want it to start easier...but ..as you more than likely already know....there is a point that this can effect its power to some degree if you are willing to lose that.
DUB
Racer
Joined: Oct 2011
Posts: 495
Likes: 23
From: Killeen, Texas
I have a similar collection, 66 427/425 hp, 70 454, and a 70 Chevelle SS 396. All of my rides have Edelbrock EFI. The SS has a 540 solid roller, Tremec 5 speed, and Edelbrock Pro Flo 3 MPFI. The 66 427 also has the Pro Flo 3 and the 70 has a new 496 engine and the E Street 2 throttle body style because of the limited hood clearance.
I really like efi for the easy starts, better fuel economy, and easy tunability.
I really like efi for the easy starts, better fuel economy, and easy tunability.
Last edited by Kris_K; May 21, 2018 at 09:51 AM.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Thread Starter
Racer
Joined: Jul 2003
Posts: 282
Likes: 52
From: Lima Oh
This is an important question if you ask me. If you get a chance to let us know...it can provide information that can either make suggestions aid you in gaining fuel economy or not.
But...I guess you bought this car due to it can tear of the pavement?...or was it for other reasons. Not that it really matters...but if you bought the car because how beautiful it is and the true horsepower...then living with how much it likes gas is what it is.
I know you want it to start easier...but ..as you more than likely already know....there is a point that this can effect its power to some degree if you are willing to lose that.
DUB
But...I guess you bought this car due to it can tear of the pavement?...or was it for other reasons. Not that it really matters...but if you bought the car because how beautiful it is and the true horsepower...then living with how much it likes gas is what it is.
I know you want it to start easier...but ..as you more than likely already know....there is a point that this can effect its power to some degree if you are willing to lose that.
DUB
Ken
Thread Starter
Racer
Joined: Jul 2003
Posts: 282
Likes: 52
From: Lima Oh
I have a similar collection, 66 427/425 hp, 70 454, and a 70 Chevelle SS 396. All of my rides have Edelbrock EFI. The SS has a 540 solid roller, Tremec 5 speed, and Edelbrock Pro Flo 3 MPFI. The 66 427 also has the Pro Flo 3 and the 70 has a nee 496 engine and the E Street 2 throttle body style because of the limited hood clearance.
I really like efi for the easy starts, better fuel economy, and easy tunability.
I really like efi for the easy starts, better fuel economy, and easy tunability.
Nice collection! Add a 66 GTO and we could be brothers from different mothers!
Ken