Update on my car and review of the Enthalpy Ecu

[Craving4Boost]

i dont think he controls the part about running atmospheric BOV. Stock turbo cars even run recirculated so its probably the easiest way not to stall.

[onosqv]

O, ok. I just read this wrong then:

Last but not least is the atmospheric BOV. I run a greddy type S and with the Enthalpy, i can now go to neutral without fear of gigantic backfire after moving off again and without fear of the car stalling.

[Jookmasta]

yes he does control running the bov vented to the atmosphere. you put this in your list of things describing your setup. this is fact as i had to zero out all of my decel settings on the safc to have the car running right. also it is the enthalpy ecu that deals with it as when i left off at say seventy or so, the revs will drop but then immediately shoot up to like 1200 or so and stick there after the let off............

[Edub1]

Quick noob question...

That table is for the advance right? Maybe I'm misunderstanding how advance works... but if I'm reading that table right, 4000rpm at full TP you have 24 degrees advance, but 4000rpm at low TP you have 43 degrees... Don't you advance more on hard throttle than when you're just cruising? And I guess that's the advance + base advance (of 20 degrees right?). That would me 44deg on full TP 4000rpm and 63deg on low TP 4000rpm....

I have to be reading this wrong...

Good question. First, we believe the table is total timing. For advance you minus your 20 deg.

As to the second question - no. Under WOT cylinder filling is more efficient, so you will have higher overall compression. To avoid detonation, timing must back off. However, as the motor spins faster, timing must be advanced. While cruising, there is little chance of detonation so timing advances significantly.

Check this out.

http://members.aol.com/dvandrews/ems.htm

[Craving4Boost]

yes he does control running the bov vented to the atmosphere. you put this in your list of things describing your setup. this is fact as i had to zero out all of my decel settings on the safc to have the car running right. also it is the enthalpy ecu that deals with it as when i left off at say seventy or so, the revs will drop but then immediately shoot up to like 1200 or so and stick there after the let off............

is this true with other people? can someone clarify this? devious_KA?

[hannibal]

Glad to hear your setup is running well, Jook. Maybe I missed it, but youre not still using the SAFC, right?

Best tuning thread Ive seen in a while...

[deviousKA]

Open bov is not a problem with properly tuned A/F, if it is lean as it should be where the ecu drops after it has recouped from the extended airflow, it will not stall as your coming to a stop or low load.

But you will have to live with rich A/F between shifts in boost at high rpms.

Tune the idle/low load to 15-15.5:1 and low > mid boost no leaner than 12.5-12:1 and you wont have a problem.

If your running 13-14:1 at idle, 13:1 cruise, and 10.5-11:1 in lower > mid boost you will have issues with open bov for sure.

[BlackHat]

Good question. First, we believe the table is total timing. For advance you minus your 20 deg.

As to the second question - no. Under WOT cylinder filling is more efficient, so you will have higher overall compression. To avoid detonation, timing must back off. However, as the motor spins faster, timing must be advanced. While cruising, there is little chance of detonation so timing advances significantly.

Check this out.

http://members.aol.com/dvandrews/ems.htm

Great website, thanks.

And I was wrong on the 20*. I misread the sticker under the hood, it's 15* on my KA24E. (Thought I'd add that so I didn't confuse anyone) That would make sense that the table is total timing. As the 15* is based on 750rpm idle.