A back to back dyno test between triple Weber Carburettors and Jenvey Heritage Series EFI Throttle Bodies, on one of Australia’s most favourite muscle cars, the LJ Torana.
Thank you for ALL your honest and easy to understand results with this test. I am just about to update from a 32/36 Weber (which has been running super rich) on my 1966 1500cc Isuzu Bellett to a 38/38 Retroject EFI Throttle body and Autronic ECU.....this is a great insight to the fact it is NOT going to make it into a horsepower monster. All I am trying to achieve is better acceleration and driveability, as currently it is a slug off the line. I am also aiming to turbocharge it next year to get just a little bit more get up and go. Thanks.
Good test. Have you ever heard of Keith Frank? He makes a replacement emulation tube that works on a totally different operating principle. He calls them Venturi Pump Tubes, or VP tubes. He is not great at marketing but i really want someone like you, with a dyno and weber ecperience to check them out. He also makes a bunch of other trick parts like idle jets with adjustable air bleeds.
Really good test. I think to make it better you could get someone to 3d print some new velocity stacks with an identical bell mouth profile and length to the webers big with a flange for the jenvey bodies.
Hi mate, I'm running triple 45mm webers. I'm interested in what you have done with the computer ignition set up, and also the throttle linkage. Can I get some help or info please
It’s a Haltech Elete 750. It could be a 550? It was a while ago so I can’t quite remember. In any case, it’s one of the lower spec Eleite’s. 99 percent sure it’s a 750.
@@jdfilms1426 Thanks for your reply. Im building an engine for my EH with an Irving stage 2 cylinder head with triple Webbers. I was going to run a wideband o2 sensor until I saw what you did.
Its interesting i have always had the thought EFI injectors were an odd design very clumsy when you consider the better part of 60 70 years of development went into carb design and we arrived at a Venturi to deliver fuel at the ideal position in the intake stream with little fuel Pressure (relative) Why move it and redesign the wheel then try to compensate with higher injection pressures Why not retool the carb body and use the efi injector to metre the fuel to the Venturi then you get the best of both worlds
Is that the customer who is banned from many workshops / machine shops in Sydney because he just hangs around like a bad smell? I think i met him at Dominator Engines one day
nope, if that was the case, all performance cars would still run carbs. I wouldn't even be looking at cars for this test, motorcycle carbs and injection is leaps and bounds better than anything running on cars, and you won't find a carb that works better than injection on a race bike ever.... Motorcycle tech is miles ahead of anything car related, always has been...
@@MickH60 it's because new cars have efi. Pro stock stayed carbs until forced to go efi to keep up with emissions and what people have in their every day cars. I owned a Dyno so I am telling you that carbies made more peak hp every time on my engine Dyno. That was 10 years ago. That is NA car engines I'm talking about.
Thank you for ALL your honest and easy to understand results with this test. I am just about to update from a 32/36 Weber (which has been running super rich) on my 1966 1500cc Isuzu Bellett to a 38/38 Retroject EFI Throttle body and Autronic ECU.....this is a great insight to the fact it is NOT going to make it into a horsepower monster. All I am trying to achieve is better acceleration and driveability, as currently it is a slug off the line. I am also aiming to turbocharge it next year to get just a little bit more get up and go. Thanks.
Presents a lot of good points. I think you missed mentioning one of the key benefits, much cleaner emissions.
Good test. Have you ever heard of Keith Frank? He makes a replacement emulation tube that works on a totally different operating principle. He calls them Venturi Pump Tubes, or VP tubes. He is not great at marketing but i really want someone like you, with a dyno and weber ecperience to check them out. He also makes a bunch of other trick parts like idle jets with adjustable air bleeds.
Great video and very informative. Thanks for sharing your knowledge with us minions.
Great video gents.
Really good test. I think to make it better you could get someone to 3d print some new velocity stacks with an identical bell mouth profile and length to the webers big with a flange for the jenvey bodies.
Hi mate,
I'm running triple 45mm webers. I'm interested in what you have done with the computer ignition set up, and also the throttle linkage. Can I get some help or info please
Have you tried an Aussie Rotec ITB?
What model Haltec is that running ?
It’s a Haltech Elete 750. It could be a 550? It was a while ago so I can’t quite remember. In any case, it’s one of the lower spec Eleite’s. 99 percent sure it’s a 750.
@@jdfilms1426
Thanks for your reply.
Im building an engine for my EH with an Irving stage 2 cylinder head with triple Webbers.
I was going to run a wideband o2 sensor until I saw what you did.
Its interesting i have always had the thought EFI injectors were an odd design very clumsy
when you consider the better part of 60 70 years of development went into carb design and we arrived at a Venturi to deliver fuel at the ideal position in the intake stream with little fuel Pressure (relative)
Why move it and redesign the wheel then try to compensate with higher injection pressures
Why not retool the carb body and use the efi injector to metre the fuel to the Venturi then you get the best of both worlds
Is that the customer who is banned from many workshops / machine shops in Sydney because he just hangs around like a bad smell? I think i met him at Dominator Engines one day
I always found carbies made more peak power then efi. I always put it down to better atomisation with a carburettor
nope, if that was the case, all performance cars would still run carbs. I wouldn't even be looking at cars for this test, motorcycle carbs and injection is leaps and bounds better than anything running on cars, and you won't find a carb that works better than injection on a race bike ever.... Motorcycle tech is miles ahead of anything car related, always has been...
@@MickH60 it's because new cars have efi. Pro stock stayed carbs until forced to go efi to keep up with emissions and what people have in their every day cars. I owned a Dyno so I am telling you that carbies made more peak hp every time on my engine Dyno. That was 10 years ago. That is NA car engines I'm talking about.