SoloRacer

Now I know what has been taking your time! Looks great Chris, makes me want to do more with mine. Unfortunately, I don't have your skills. That is an amazing amount of power for 1 bar. I'm not familiar with the newest Haltech ECU's but their older stuff didn't have the stablest ignition. For me on a big build I would still go with MoTec as they seem to be the leaders and have great support.

Stephencs601

I am out there all the time. We are doing a high profile politicians house out there by the course. In fact, I have to drive thru it to get to the house. Yes very sad it is gone. Rich neighbors can wreck everything.

EliteThink

very nice!

Darwantae951

Come on Chris...I think you could do better...

Duke

It will absolutely work well on a 3l but it's more a matter of displacement and boost and for most 3l in this community a smaller GTX turbo would gain response without sacrifying any power.

As Thom writes the GTX models are a step "larger" than their corresponding GT models and have a slighly bigger turbo lag.

Chris White

Ok, I'll scrap the whole project and start again.....

Chris White

I wondered is anybody would catch that!

I am going to use an interesting approach to boost control. The primary boost control is the Turbosmart eboost2 and the secondary boost control is the Haltech ECU. As a safety measure the Haltech will be able to reduce boost levels based on coolant temps & pressures, oil temp & pressure, and possibly knock sensing. In addition I plan on trying something new - using the TPS voltage to regulate boost levels. This really helps with larger throttlebodies. It will take some time to map out a table that has a boost limit (solenoid pulsewidth %) based on TPS. The max boost level will still be set by the eboost2 but the part throttle boost will be controlled by the Haltech.

I am having a little fun with the engine management - just because I can! I even have it set up to turn the A/C off at full throttle - in case I really need the last several hps at 600hp!

Hmmm, maybe I could use an output from the Haltech to vary the stereo volume based on manifold pressure.....

Chris White

Yeah, but this is not a 'usual' 951 engine!

Chris White

I have talked to MoTec several times about using their products, I like the hardware but I have to admit that I don't like the business model that they follow. Any extra functions cost more $ and the general direction to the dealers is to charge for any and all support. I know some folks that have spent way more in tuning and support charges than the equipment and installation. If you can afford that then I guess its OK, but to me one of the great appeals of the 944's is the lower cost of performance (relative to other Porsches!), so I like the idea of trying to find quality solutions that are as reasonable as possible in terms of cost. I have stuck with Electromotive for years because its a quality product that has a lot of race experience. You do have to know what you are doing to properly set up an electromotive ECU but if you do it will work well. The Haltech ECUs have better user interface and some nice features - in fact there are many very nice street standalone systems out there now - way better than it was 5 or 10 years a ago!

blade7

Is any of it 951 ?

KSira

I am not familiar with Haltech and eboost2, but what is the benefit with eboost2 over the Haltech system? My Link G4 storm, has very advanced boost controller functionality, and cannot say that I find anything missing. Except for maybe a kalman filter. That would be real nice (but a b*tch to tune)

Chris White

Looking at the track location from google maps I can see that some of the track is still there....I occasionally fantasize about going there are ripping a couple of laps 'off road' on the old course!

Here is a quick map of the race course overlaid on the golf course....Stupid golfers!

Chris White

Right side engine mount, turbo coolant pump, intercooler, oil pan and coolant hard pipes....

Chris White

The eboost2 has many (almost too many!) ways to fine tune boost control. My favorite use is a 6 stage sequential boost settings. I can have six boost settings that I can 'scroll' through with an up/down switch.
You can vary the boost map by RPM, gear selection, and other inputs. You can tune it for a small boost spike or a soft boost start if you want.

The Haltech has either closed or open boost control - I have not used it for that function before so I can't vouch for how good a job it does.

Chris White

Here is the list of boost control features for the Haltech -
protection for limits on the following:
Coolant Temp
Coolant Pressure
Oil pressure (with minimum TPS and MAP qualifiers)
Fuel Pressure
Manifold Air Temp
EGT
Overboost

The closed loop boost control is programmable for:
Start Duty
Proportional
Integral
Derivative
Control Start Pressure
delay till control

As well as target boost tables and closed loop base duty table.