[tscdennab]

Hi,

I am researching the pros and cons of each method of methanol flow triggering: based on the injector duty cycle vs. based on boost. Is the IDC method really better than boost ? I mean, the N54 can make high boost off the line, would I need meth to be sprayed at a low RPM where probably there is not much fuel sprayed into the engine ? I am not confortable with spraying meth when the injectors don't spray much fuel, are there such situations (high boost / low IDC or high IDC/low boost) for the N54 engine ?

[Sniz]

Originally Posted by tscdennab

Hi,

I am researching the pros and cons of each method of methanol flow triggering: based on the injector duty cycle vs. based on boost. Is the IDC method really better than boost ? I mean, the N54 can make high boost off the line, would I need meth to be sprayed at a low RPM where probably there is not much fuel sprayed into the engine ? I am not confortable with spraying meth when the injectors don't spray much fuel, are there such situations (high boost / low IDC or high IDC/low boost) for the N54 engine ?

Aquamist


I feel like i'm saying that a lot recently.

flows based on injector duty cycle - Ideal
Has fantastic failsafes - Ideal
works w high concentrations of meth - Ideal

and you wont find higher quality parts on a off the shelf kit. HFS-6 is even better but more $$, thats what I have on my e36.

one of the users on this board worked with Jeff@HowertonEngineering to put the HFS-3 on his 335, thats the way I would go hands down.


apparently the HFS3 is working well w DI motors.

click below

[Funkmob]

I have the Labonte S4 meth setup with IDC and boost activation.

Im fully stage 3 modded running +/- 18 psi . I see the same IDC values at light throtlle input and low boost , as i see at full throtlle and max boost.

The car injects alot of fuel , not only on peak boost or high rpm.

Feathering the throtlle i see IDC values around 8-10 when you push the throtlle a bit so you can feel the torque come in , you can see the IDC values shooting up to 75-80% .

The controller reacts to this and injects alot of meth at low boost levels .

[Sniz]

how much flow are you seeing at 50% throttle building boost vs WOT?

curious.

[Funkmob]

Originally Posted by Sniz

how much flow are you seeing at 50% throttle building boost vs WOT?

curious.

I have the impression the controller injects only according to IDC levels , the boost connection tube seems just used to have a start boost point.

I can get high IDC levels and high injection levels with less then 50% throtlle input.

This controller is definitly not easy to setup , i think i got it working ok now , but it takes some trial and error.

I have start boost set to 8 psi , and my gain turned up high to get good max flow. Sometimes just overtaking a car , pushing throtlle medium wise , i get (for example) a peak recall of 8.7 psi , IDC level of 77 and a injection of 730ml/min.

The car must be requesting alot of fuel during these , what would seem light loads.

If i set gain lower it seems the controller reacts also more to boost , and so injecting a litlle bit less on lower boost levels.

in another thread i said that i see lower IDC values at peak recall since i went from 550ml/min to +/- 700ml/min max injection.

Maybe the DME doesn't react fast enough to the sudden meth injection to lower the pump gas injection. So that at a low boost i get high IDC values and high injection values. I think that during the pull the DME adepts to the meth and suply's fuel accordingly.