Ernie J

Call John Behe, he can help you out. 1-410-712-4290 He can tune it , he set up mine, although not a S2. He's in Maryland, its worth the drive.

Voith

I got the base map for 944 turbo which should be a good starting point today, so if anyone needs a copy I can share.

Raceboy

Lowest kpa value is 50kpa? Seems a bit high as I have seen 951/S2 motors that easily pull 28-30 kpa at idle which means that engine would run outside the range of the table. If you are planning to use ITB's that should make it a moot point though (usually 50-60 kpa is the lowest you can get with ITB's).

Voith

Must explore this haltech software. Probably column can be added to this map. What about the values, do those seem right?

Raceboy

I can judge ignition table by just looking at it but fuel table is so unique to each ECU that there is absolutely no point in trying to analyse it. Unless it is totally off of course which that one does not seem to be.

Voith

This is the ign table..

Raceboy

It actually looks pretty good for 16v, 951 8v could make use of more advance.

Voith

Thank you. Appreciate some actual 16vT knowledge.

These are the target AFRs. How do these look?

If I understand this correctly, ecu can (with CANbus wideband) run in closed loop from this table without the risk of sensor error since CANbus wideband reports wideband state/errors to ecu?

odonnell

Are those kPa values relative to atmosphere or relative to vacuum? I'm used to seeing relative to vacuum. Just be careful because your entire graph could be off by 100 kPa if you tune it one way, and the code has it set up for another. If this is relative to atmosphere, you're coming into boost at 13.x

968gene

For the Haltech Elite Series, it looks like only the Haltech Elite 2500 has the capacity for two knock sensors (the Elite 1500 just one).

Q: what do other systems offer? My current ECU, Euro1, does not have provision for knock sensors and there was evidence of detonation during the rebuild.

Raceboy

At 2bar boost (197kpa) it looks to be too rich imo, does not mater what boost, 10.x is too rich and it does not help much to protect the engine. I would go for 11.2-11.5 range. It will still puff some black smoke, Porsche 16v engines seem to give black smoke in relatively high AFR's, don't know why, seen that with several engines.
At 1 bar range, aim for 12.0, at 1.4-1.5 bars aim for 11.7-11.8 and interpolate the other cells between those. That is safe enough.

Max Energy

Gene,
I am going with a Motec for this new 968 race motor
Max

Raceboy

VEMS for example has support for two knock sensors, work perfectly with 944/968 engine.

Voith

That mm itb setup looks awesome. Which motec ecu will you use max?

968gene

"Gene,
I am going with a Motec for this new 968 race motor
Max"

Max, I'm a bit stumped on what to use as the initial start up mapping. I've got a fresh engine and have anxiety about too rich and too lean during start up.