Quote:
Originally Posted by Pehlen
I've read elsewhere that the vacuum lines should be equal length. From the pictures, I think I see that yours are not. Is there an appreciable impact with the MAP sensor to make them equal length, or not?
BTW, this is one of the threads that inspired me to do similar.
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No impact whatsoever. Besides, all the vacuum lines are effectively combined in the manifold. Only one signal to the ECU/MAP sensor.
The only issue with ITBs is getting a quiet MAP signal at idle. The reversion pulses can easily be seen by the sensor at low intake gas speeds. Yes, these are the same reversion pulses that confuse the AFM in Motronic and Flapper in CIS. The difference is that you can ignore some of the noise and fluctuations in software and tuning.
This is a great build. I would like to know more about where you had the manifolds cast and that process.