Huntley Racing

We can certainly build the car for you from start to finish. We are in San Diego. Let me know if we can help.

badkarma

Might want to check out the AEM standalone as well. They definitely won't have a PnP version for the 951 but the unit's pretty feature packed. The unit actually comes from Gems UK.

fusionsport

I have used Motec, Tec, haltec,etc,and am a dealer for dta. For someone who wants to really understand the system and need reliability- id recommend the motec or the dta. I dont personally like the tecII but the tecIII is much much better. Whatever you get spend the money on dyno time.

Danno

Doc, I recall earlier you wanted a plug & play system with minimal tuning and adjustments necessary. You mentioned while adustability may be good, it's also possible to adjust things in the wrong direction and blow up the car.

So it sounds like you would be best served with an EFI system that has the following features:

- wideband O2-sensor inputs
- auto-tune feature to populate the fuel-maps automagically

The combination of these two will allow you to just enter some rough parameters in the beginning like #-cylinders, displacement, injector-sizing, boost, etc. Then all you have to do is drive around for awhile to hit all the RPM x load zones in the map that that's it! The system will monitor air-fuel ratio with the O2-sensor and make the necessary corrections.

Konstantin

do not forget. You need something with a knock control monitor

<a href="http://www.autronic.com/sm2ecu.html" target="_blank">http://www.autronic.com/sm2ecu.html</a>
<a href="http://www.dtafast.co.uk/" target="_blank">http://www.dtafast.co.uk/</a>
<a href="http://www.sdsefi.com/" target="_blank">http://www.sdsefi.com/</a> <a href="http://www.luepertz-motorsport.de/" target="_blank">http://www.luepertz-motorsport.de/</a>
<a href="http://www.emergent.com.au/200sx/ecudata.html" target="_blank">http://www.emergent.com.au/200sx/ecudata.html</a>
<a href="http://www.sci.fi/~hestec2/english/aindexE.htm" target="_blank">http://www.sci.fi/~hestec2/english/aindexE.htm</a>
<a href="http://www.pectel.co.uk/" target="_blank">http://www.pectel.co.uk/</a> (sollen sehr gut sein)
<a href="http://www.motec.com.au/m4club.htm" target="_blank">http://www.motec.com.au/m4club.htm</a>


Konstantin

MySwiss

Can anyone tell me what type of crank trigger we have on the 951 (ie:6o teeth -2 teeth).because I was led to beleive by my local DTA dealer, that I would need this type of trigger for DTA Ecu to work.I was also told that the knock sensor was not that usefull above 5000rpm, since it will be detecting all kinds of noises other then real knock(detonation).If the DTA ecu is tuned on the dyno with wide band o2,is it really important to have the knock feature.

TT

[quote]Can anyone tell me what type of crank trigger we have on the 951 (ie:6o teeth -2 teeth). <hr></blockquote>

Hall effect sensors, speed sensor ticks off flywheel teeth (132 for the 951), the reference sensor detects a stud 21 teeth before TDC.

Doc

Good memory Danno...

Ya I had been concerned about ...adjust[ing] things in the wrong direction and blow up the car... however that was before I resigned to the fact the ONLY real way to PROPERLY tune the system is on a dyno.

As you know, even a mild turbo change that would SEEM to run perfectly fine would likely result in less them optimal numbers if you threw it on a dyno without mapping the system to the components.

Originally I had hoped to avoid the whole dyno process, but now realize its merits.

In fact, you are one of the people who have made me see the error of my ways….
<img src="graemlins/beerchug.gif" border="0" alt="[cheers]" />

Danno

"I was led to beleive by my local DTA dealer, that I would need this type of trigger for DTA Ecu to work. "

Yes, you need their special trigger wheel to work because it has both speed and positioning data on a single wheel. Their software is specifically written to use this trigger wheel. The 951 uses two separate triggers and sensors.

Some of the other EFI systems have programmable triggering that allows you to enter the number of teeth, type of trigger, voltage-peak of signal, etc...


"I was also told that the knock sensor was not that usefull above 5000rpm, since it will be detecting all kinds of noises other then real knock(detonation).If the DTA ecu is tuned on the dyno with wide band o2,is it really important to have the knock feature. "

It depends upon the system as far as the usefulness of the knock-sensor. These systems are pre-programmed with what a knock/detonation SHOULD sound like. However, each car is different. The SDS has a knock-threshold that's adjustable. Some of the other systems we've been playing with actually learns the normal operating noise of your drivetrain (valves, lifters, etc.). It then uses this as a masking-filter to isolate CHANGES from this normal behavior to sense knock.

Doc

Danno,

To expand on my last post on this thread... I just re-read my other thread RE:"Complete package" and seems as if your complete system would address all my concerns about piecing together a turbo from here, injectors from there and an ECU from yet another place, etc.

However, if you've already tested the complete packeage... then there shouldn't be any problem... With that said, would you still require dyno time to fine tune the system?... just a half hour - hour, compared to several hours hunting and pecking.

Konstantin

the DTA do NOT have a knock sensor. The ycan do it BUT they will NOT do it. This is what I have been told by the head guy at DTA in UK.

Konstantin
PS@Danno. which ECU can use the stock sensor without needing another aftermarket sensor. I do not like teh idea of other sensor or magnets or what ever and I doi not feel comfortble installing them in the car. I would like to use teh stock one. I heard the the Halltech can use this. Any other ECU can use the stock sensor too?

Supermac 7

Have any of you successfully used a Haltech system (full standalone, not just fuel based) on the porsche?

They are pretty popular for the higher end cars in the RX-7 world.

As far as the A'PEXi S-AFC, I have one on my RX-7, and I absolutely love it. It's a piece of cake to tune on the dyno, and not hard to understand. All you need is basic knowledge of tuning. It modifies the signal from the air flow meter to the ECU to adjust your fuel curve. It has its limitations, but it's pretty good for a piggyback unit.

Jameson

BC

That idea on the DTA needing a special crank trigger is new to me Danno. I suppose that we are talking about two different cars here....

I was told by various people with DTA knowledge that the DTA will essentially handle any sensors that you tell it to handle. For instance, I can keep my crank sensor on the 89S4, but I need new air temp, TPS (potento), and a cam pos sensor.

Chris White

Hi Guys – I’ll throw in my 2 cents here – first, the key to a successful stand alone is support! (along with a well thought out installation). The stand alone route has a very steep learning curve if you don’t get help from the supplier on your 951 installation and help with the tuning afterwards. It is not uncommon for people to spend more on dyno time to tune than they spent on the hardware. The moral of the story is to find someone who can support you and your car!
Knock detectors – fairly useless unless you are so far out of tune that you knock at very low rpm and boost. Our engines make enough mechanical noise at high rpm that the knock sensors are not very useful. Most applications allow you to turn the knock sensors off based on rpm or map – this is needed to avoid a lot of false sensing.

BTW – It was nice to get to play at the track (VIR) with Alan earlier this month. There were 4 Tec3 powered 951s all parked near each other! Hopefully we will have more time to chat next event!!

Chris White <a href="http://www.944enhancement.com" target="_blank">www.944enhancement.com</a>

BC

I agree Chris. Support s very important. Butwhen you ar ein a situation where you want the unit because of its features and there is essentially NO support, then you just go ahead anyway.

Though, I will have to call this gentleman that was listed above as a DTA guy.

I'm always up for a challenge.