So I've been a lover of ITBs and fuel injection forever. And I've had plans since forever to install ITBs on my M20 as soon as I can afford it. However I've been reading into high horsepower NA m20s and with that comes reading a lot about what people have done with the flow in the top end of the motor. The thread I'm enjoying right now is this:
http://speedtalk.com/forum/viewtopic...31132&start=15
Obviously the insane 350whp NA M20 described is amazing and has an insane amount if custom work, but some of the principal's from it are inspiring. And it brings the question to mind that's probably been answered many times: Triple webbers vs. an itb kit.
Obviously tuning comes in to play here. The ITBs are fuel injection that megasquirt can control. It's a computer so it can be consistent and will need less attention. Carbs will need to be adjusted regularly, and that will require me learning carbs. MS can still run wasted spark timing with carbs installed. There's a poster in the linked post that mentions (check page 1 of the forum post) something about better fuel blending with carbs and something about itb setups liking different things in the intake. I'd always sided with the consistency and reliability of fuel injection, but I admit I'm curious about the carbs. Putting them on an M20 is really similar in cost to the RHD itb kit. Plus then MS can be used to run an individual port meth injection system for det control with higher compression. I plan to have the ports worked and expanded for larger valves so the intake can be optimized. Let's just assume this is my fairytale pipe-dream M20 and it has a roller cam conversion too and can rev to 8 grand. What are the benefits, negatives, compromises between side draft webbers and ITBs?
http://speedtalk.com/forum/viewtopic...31132&start=15
Obviously the insane 350whp NA M20 described is amazing and has an insane amount if custom work, but some of the principal's from it are inspiring. And it brings the question to mind that's probably been answered many times: Triple webbers vs. an itb kit.
Obviously tuning comes in to play here. The ITBs are fuel injection that megasquirt can control. It's a computer so it can be consistent and will need less attention. Carbs will need to be adjusted regularly, and that will require me learning carbs. MS can still run wasted spark timing with carbs installed. There's a poster in the linked post that mentions (check page 1 of the forum post) something about better fuel blending with carbs and something about itb setups liking different things in the intake. I'd always sided with the consistency and reliability of fuel injection, but I admit I'm curious about the carbs. Putting them on an M20 is really similar in cost to the RHD itb kit. Plus then MS can be used to run an individual port meth injection system for det control with higher compression. I plan to have the ports worked and expanded for larger valves so the intake can be optimized. Let's just assume this is my fairytale pipe-dream M20 and it has a roller cam conversion too and can rev to 8 grand. What are the benefits, negatives, compromises between side draft webbers and ITBs?
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