May 27, 2020, 11:18 AM
Alaskaracer
quote:Originally posted by Bucky:
Well, let me ask a question in a different way: Did air flow make a difference in your selection of intakes for the Ron's setup? Certainly it is important. But worst intake to best intake isn't night and day difference anyhow.
If it were me, I would go for the efi intake and either port match it or run it, then port match if needed. The efi conversion can be a little challenging, but if you have a mill and can weld aluminum, you can do that yourself.
quote:Originally posted by MorgretNation:
I am thinking of switching from my ron's setup to an EFI setup. Current build is 09 M&M 565 HH383 Sniper2. Manifold is hydro dipped so I dont really want the expense of having it stripped to have the intake fitted for efi. My question is when it comes to injection weather it be MFI or EFI does the intake really play a huge part in the power. Reason I ask is I am looking at 3 different intakes. The SV565 , Edelbrock 29165 , & another Sniper 2. The 29165 is already cast as an efi intake so it would only really require a port match where as the other 2 will need to be modified for EFI. Cheaper way would be go with the EFI intake but I do not want to sacrifice performance. Looking for some opinions from you guys
quote:Originally posted by Coloradoracer:
Biggest benefit to MFI/EFI is that the manifold only needs to carry air. Think about it this way, with a carb, you need the carb sized accordingly so it will provide fuel because it relies on vacuum to work. Injection doesn't, and that's why the throttle bodies tend to be somewhat larger than a carb...So there isn't the pumping losses on the intake....More air means more fuel....
I think I got that right anyway......
quote:Originally posted by TOP38:quote:Originally posted by Coloradoracer:
Biggest benefit to MFI/EFI is that the manifold only needs to carry air. Think about it this way, with a carb, you need the carb sized accordingly so it will provide fuel because it relies on vacuum to work. Injection doesn't, and that's why the throttle bodies tend to be somewhat larger than a carb...So there isn't the pumping losses on the intake....More air means more fuel....
I think I got that right anyway......
No that is not correct. Even if the injectors are close to the head, the entire manifold is wet when the engine is running!
Carb's are dumb, but they listen to what the motor wants! MFI is stupid, it just knows engine rpm and that's what determines how much fuel the motor gets. EFI just does what it's programed to do, whether the motor wants it or not is another question. EFI can adjust fuel but it's based on info that has already happened!
quote:Originally posted by TOP38:quote:Originally posted by Coloradoracer:
Biggest benefit to MFI/EFI is that the manifold only needs to carry air. Think about it this way, with a carb, you need the carb sized accordingly so it will provide fuel because it relies on vacuum to work. Injection doesn't, and that's why the throttle bodies tend to be somewhat larger than a carb...So there isn't the pumping losses on the intake....More air means more fuel....
I think I got that right anyway......
No that is not correct. Even if the injectors are close to the head, the entire manifold is wet when the engine is running!
Carb's are dumb, but they listen to what the motor wants! MFI is stupid, it just knows engine rpm and that's what determines how much fuel the motor gets. EFI just does what it's programed to do, whether the motor wants it or not is another question. EFI can adjust fuel but it's based on info that has already happened!
