melicha8 said:Microtech ordered yippy. Now for a new design on the lower intake manifold
TurfBurn said:scoped the Microtech tonight... the word is without the cam sensor it runs a modified batch algorithm. It fires the 1 and 4 injector and the 2 and 3 injector together. So you do end up with an injector firing at the right time, but you also end up with a semi-batch firing of the injectors... it obviously works just fine and is a combination of two methods really... so I would say it is more arguable to call the Microtech semi-sequential.
Later!
Steve
EDIT: Let me know if you want the scope files posted and I will do so!
MPNick said:Never seen batch mode called semi-sequential, but what the hell.
TurfBurn said:Well, if you put the Microtech in Batch mode, it fires all 4 injectors together... versus if you run it in sequential it is breaking the injectors up.. hence I'd call it semi-sequential instead of batch.. because it certainly is not firing the full bank in one series.
MPNick said:This is not right. The crankshaft wheel will only tell you TDC. In order to run true sequential you need to know not only TDC but also if the cylinder is on the compression stroke or the exhaust stroke. The way you are running the Microtech right now it is not true sequential. You are getting the injectors to fire everytime the CAS tells it we have TDC. This is why you need a camashaft, with it the ECM knows if it is compression or exhaust.
Now I do not see a problem in how you are running the system. It should work fine. It is just not true sequential.
Bigg Tim said:So then not true sequential. True sequential is each injector fires when that cylinder needs it right? I can understand your "semi-sequential", but it's still not sequential. Non the less I'm sure it will work fine, like the haltech.
Like is said above, you would need microtech to do something to incorporate a CAS to get it true sequential, if you talk to them about it. And no one ever said there would be a problem running it this way so don't take this post as a negative.
It is great that you are being honest and posting all the facts about it, unlike some of the others! This makes me like the unit that much more because the truth is out there and you are posting you true results. Great job man, keep up the good work!!!!!!!!
TurfBurn said:Right.. it's not true sequential... but it is still choosing a sequence and it knows which cylinders are where so it is given them fuel, it simply doesn't have the knowledge right now as to which is on the compression stroke so it feeds both TDC pistons fuel. it is not batch firing all 4 injectors as is done with some old cars and in some other applications (relatively common to run a second fuel rail as a single batch).
Correciton.. the CMP sensor (cam sensor) is the one I'd need to integrate... it already uses the CAS (crank) sensor.
Yeah, it's not an issue, and it identifies exactly how the system runs. So now if I can have them modifiy it or not to become true sequential, then I'd be all set...
Do you guys know off hand whether the double dash or the single dash on the cam is the one that indicates the compression stroke for which cylinder?
Thanks!
TurfBurn said:I do have Microtech working on the cam sensor thing. I'm trying to pressure them into integrating that into the units I buy from them.
We should have a few dynos up from Microtech cars before the 22nd.
Later!
Steve