Dastek
Member Since: 17 Aug 2005
Location: Fife
Posts: 7
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Hi Chris,
I am not for one minute saying that your product is unsafe.
The reason the EGT test is so vital is that it is of primary importance to the safety & longevity of the engine. Another important reason is that it stops any cheating (not that I'm saying you would cheat), In the past we have submitted vehicles for magazine & manufacturer evaluation & found that other vehicles with competitors products have been quicker or more powerful on the day of the test. However it is quite clear to see during testing that the smoke output is horrendous probably due to an excessively rich AFR (Air/Fuel ratio) & if measured would most defineately have unsafe EGT's. However as this is not tested during the magazine feature (OEM manufacturers are a bit more savvy, hence we have several OEM deals ) it appears that our competitors have products that are more powerful than ours, but all they have done is produced a 'press special' Unfortunately for the unsuspecting customer, the unit that they purchase is producing no where near the power or on road performance of the unit tested by the magazine, sad but true! Having been dissapointed by our results & being self critical, we have then purchased competitors products & tested them back to back on our own 4WD dyno & on road using datalogging & a Racelogic V-box & have proven time & again our product is better. So hopefully now you can see my reason for the EGT test.
On the point about the 'pull power down' if the EGT rises too high, I can't see how this is possible, as the exhaust has no thermocouple in it, it does however reduce the boost if the charge air temperature (C.A.T) is beyond a certain value, however the C.A.T (in the intake manifold after the intercooler) takes much longer to react to prolonged excessive turbo boost caused by excessive AFR than EGT, the damage can be done long before the C.A.T goes over-limit. We offer 1 standard failsafe over & above the manufactures which is change in coolant temperature rapidly over time, (which is linked to mechanical stress or excessive EGT exposure) in which case we can reduce the power output, we also offer as an option the ability to run an EGT feedback loop, that monitors EGT versus time & can adapt the map as neccesary, no other company in the world can offer this on an upgrade, even if they are manipulating the ECU source code.
Regarding the 'plug in box' not being a 'chip' we use the same micro-processor as is found in many manufactures ECU's (not a cheap PIC as found in other diesel upgrade boxes, our unit is the same unit we use on works motorsport race & rally cars, just we've adapted the programming for diesels) so power, speed & capability is the same as most manufacturers 32bit ECU's. You are correct in that we do modify signals, but I'm sure you understand that all an engine needs to make a certain amount of power is a certain amount of fuel injected at a certain time, mixed with a certain amount of air, compressed to a certain pressure (not much you can do about compression electronically unless you get into cam angles & profiles, which if they are controllable electronically we can control them) Therfere if all systems, whether it be a standard ECU with the code tweaked, a plug in box (like ours that can adjust fuel, timing & boost - not a cheap fuel only unit!) or a stand alone ECU such as EFI technology out of an F1 car, or some crackpot with levers & bob weights, are injecting the same amount of fuel at the same point at the same level of air intake (boost) 'THEY WILL ALL PRODUCE THE SAME POWER!' Now yes some might say I'm biased as I own the company however I have tested all these different methods, so I am in a position to say what works. The crackpot with the levers & weights, will get the same result, but it's not very practical having to adjust things like this whilst driving The F1 ECU is perfect but extremely expensive & slightly overkill for our needs. The ECU chip source code tweak is effective, however unless it can be tuned live (i will come to this later) & not many can, it would take several thousands of dyno tests to arrive at the optimum point of power or economy or a balance of both depending on driver demand, due to the fact that an estimate of the data value & location would need to be made, an adjustment made, & a test conducted, results analysed, then the process repeated again & again with a slightly different value to ascertain the difference made, this would have to be repeated for every level of engine load & engine speed, no easy task, I have been there & done that 10 years ago using specially developed Bosch software on F3 Opel-Speiss engines - never again You then come to our product which is the accumulation of over 30,000 vehicles dyno tested by ourselves & approximately 100,000 more vehicles 'LIVE' tuned by our authorised dyno tuners (which reads as a who's who of performance tuning) We have a unique product that allows us to change the quantity of fuel, the point at which it's injected, the amount of boost pressure present all referenced 3 dimensioanlly against engine speed & load. As an example we can hold the vehicle on our dyno at 1000 rpm, at full throttle, change the amount of fuel, the injection point, & the boost pressure, so we can twiddle a few knobs on our interface linked to our laptop & see whether more fuel with less boost with more injection advance is better than more boost with less fuel & more advance, we can adjust these values 'LIVE' & INSTANTLY see the optimum point for power with safety, with the dyno still controlling the engine speed to 1000rpm, we then lift of the throttle until we have acheived 95% load & repeat the process, then again at 90%, so on & so forth, when we get down to around 50% load, maximum power is less important & economy takes priority, so then again we can quickly & easily find the right balance between fuel, timing, & boost to give the best economy. The dyno control speed is then adjusted to 1200rpm & the whole process is repeated, & so it goes every 200rpm & every 5% load. The process using ECU download procedures with the engine switched off everytime you need to make a change, would take about a week to arrive at the same level of optimisation, but having reversed engineered some code for fun (sad I know ) I have found that often, nothing more than a global change has been made to the complete fuel & boost tables, so really no better than the most basic PIC plug in boxes. Think about it this way we have been developing our diesel range for around 4 years & we cover about 60 vehicles (we have an R & D facility that put's most factory works teams to shame, hence we do a lot of factory works work if that makes sense ) some of our competitors have several thousand cars covered, so they must have one hell of an R & D facility
Anyway sorry for the rant guys, I'm just passionate about our products.
Cheers,
Gerry
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