About time... What will happen to restrictor plate tracks now
The restrictor plates will still work since they're only using throttle body injection (not much better than carbs imo).
Nascar & efi...
- Thread starter Chuck Leeper
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The restrictor plates will still work since they're only using throttle body injection (not much better than carbs imo).
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Ahhh... I thought they were really doing it....
A couple of weeks ago I went to the SAE chapter meeting held at the NASCAR hall of fame. The guest speaker was from NASCAR R&D and his presentation centered around the EFI system. Here are a few take aways:
It is port injection, with the injectors mounted high up on the runners so as to not give an advantage to any one engine layout, as the different manufacturers have different runner angles.
The ECU will also be used to control ignition, individual coils will be used.
The ECU's will be provided to the teams by NASCAR and will be tamper resistant. A self generating code, similar to garage door openers, will be used to check to see if the ECU's have been tampered with. NASCAR does not want any teams adding complex features such as traction control. However, there is some programming allowed, . . .
Each team can create and modify their own fueling and spark tables. It's up to the teams to decide which RPM ranges, loads, VE's and timing go into the tables.
NASCAR will also provide the injectors.
It is up to the teams to source coils as well as the wiring harness. Teams can build their own wiring harnesses. NASCAR does not want to be responsible for someone losing a race due to a NASCAR issued wiring harness failure.
Even though the system is sequential with injectors mounted in the runners, the throttle body looks exactly like a four barrell carburetor body, which is hilarious to me. It was explained that Holley is the supplier for the throttle body, and NASCAR did not want to kick Holley to the curb after 60+ years of support. But still, couldn't Holley have created a single bore throttle body?
Welcome to the 80's NASCAR!
It is port injection, with the injectors mounted high up on the runners so as to not give an advantage to any one engine layout, as the different manufacturers have different runner angles.
The ECU will also be used to control ignition, individual coils will be used.
The ECU's will be provided to the teams by NASCAR and will be tamper resistant. A self generating code, similar to garage door openers, will be used to check to see if the ECU's have been tampered with. NASCAR does not want any teams adding complex features such as traction control. However, there is some programming allowed, . . .
Each team can create and modify their own fueling and spark tables. It's up to the teams to decide which RPM ranges, loads, VE's and timing go into the tables.
NASCAR will also provide the injectors.
It is up to the teams to source coils as well as the wiring harness. Teams can build their own wiring harnesses. NASCAR does not want to be responsible for someone losing a race due to a NASCAR issued wiring harness failure.
Even though the system is sequential with injectors mounted in the runners, the throttle body looks exactly like a four barrell carburetor body, which is hilarious to me. It was explained that Holley is the supplier for the throttle body, and NASCAR did not want to kick Holley to the curb after 60+ years of support. But still, couldn't Holley have created a single bore throttle body?
Welcome to the 80's NASCAR!
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