[QUOTE]Originally posted by seiscanecos74:
[QB] But in my case the cam is 248@0.050. What should I do with the MAP sensor? Use a restrictor?

If the line from the manifold to the MAP sensor is rubber put a peice of round aluminum in the hose so it is air tight and drill a 0.01" hole in it. You will have to expriment with the hole size.

The desired result is to get a stable pressure signal to the MAP sensor. If in the end you cannot achieve this, you can run megasquirt in "alpha-n" mode, but its harder to tune the motor.


Doesn´t the MegaSquirt correct this fluctuation in the manifold pressure?

No.

And if I´ll use tree throtlles, should I use tree TPS to or just one?

1 TPS is just fine. Megasquirt uses the TPS for 3 purposes:

1) clear flood mode
2) acclerator pump mode.
3) closed loop tuning

The MAP and tachometer input determine the engine load, the TPS determines driver demand.

The coolant and intake air temperature sensor "trim" the amount of fuel being added.

The O2 sensor give input to the closed loop tuning.


51 GMC 4.2 turbo
Can't solved today's problems using the same technology/thinking that created them