EFI conversion on a Gen-1

[MaxMidnight]

It`s all about intake speed. Smaller intakes make for more torque, which is always nice on a V4-1200cc motorcycle . But as you say the smaller bore cannot let enough air (and fuel) through to get the max horsepower. Vboost is the best of both worlds by adding the additional fuel via the second manifold. Let`s see how it behaves with EFI.

That's my point, it will be interesting to see comparable dyno results.

 

[RempageR1]

An update again .

First, the Vboost is now connected. 2 dollar pins, some printing and it`s fixed:


A closeup of one of the fuel rails:

I had to drill a channel from the side to get the fuel to the injector openings. That channeel was capped off by that inbus.

Below, a pic how it all goes together: Fuel lines from the left and also the injector wiring harness. On the right, a newer type of MAP-sensor to get the manifold pressure, and the original MAP-sensor to run fully-sequential (which normally needs a cam sensor, but this also works fine).


And one from the side:

Had to make 2 notches in the left fuel rail because the Vboost was hitting it. Prototyping always has it`s tiny issues

Since the sliders in the carbs can be eliminated, I printed these inserts:


Which are a snug fit into the carb:




A new flex-fuel sensor is also in. The final thing is to add 2 TPS sensors to the carbs and remove the floats. After that, it`s time to wait for better weather.

 

[gentsvmax]

Amazing, utterly amazing to have seen this through to date.

 

[Rauno Vekkila]

An update again .

First, the Vboost is now connected. 2 dollar pins, some printing and it`s fixed:
View attachment 96576

A closeup of one of the fuel rails:
View attachment 96577
I had to drill a channel from the side to get the fuel to the injector openings. That channeel was capped off by that inbus.

Below, a pic how it all goes together: Fuel lines from the left and also the injector wiring harness. On the right, a newer type of MAP-sensor to get the manifold pressure, and the original MAP-sensor to run fully-sequential (which normally needs a cam sensor, but this also works fine).
View attachment 96578

And one from the side:
View attachment 96579
Had to make 2 notches in the left fuel rail because the Vboost was hitting it. Prototyping always has it`s tiny issues

Since the sliders in the carbs can be eliminated, I printed these inserts:
View attachment 96580

Which are a snug fit into the carb:
View attachment 96581

View attachment 96582

A new flex-fuel sensor is also in. The final thing is to add 2 TPS sensors to the carbs and remove the floats. After that, it`s time to wait for better weather.

Hi,
So you have ”divided” that vacuum information: original MAP sensor reads cyl. #2 and the other sensor gets info from #1,#3,#4?