Perfect power smt6

Ettore Bugatti · Post by **Ettore Bugatti** » Thu Jan 06, 2005 9:35 pm

Well for the turbo guys, I was wondering of this product is usefull and of it worth its money.

Basical it a piggyback system, but can control extra controllers. It costs about 350 euro's. Im aware that RPruen's mod works, but I like the idea of having a standard ECU with additional injector to control extra boost

Anyway well here is the link:
http://perfectpower.canspeed.com/smt6.htm

greetz Richard

rpruen · Post by **rpruen** » Thu Jan 06, 2005 9:51 pm

That's interesting. It may actualy be of some use, it depends what It can do in the way of blocking signals from increasing over a particular range. I'm also not sure about the ignition signal, it may strugle with that, since the ring of teeth has a gap in it to fix the crank position, the ecu knows how many teeth if any go missing (when the unit changes the timing), then it will cause a missfire.

Unfortunatly It won't help with the MAP sensor, because it's inside the ECU itself. So it won't be able to remove the boost cut.

It would be intersting to see what this unit can do.

Richard

dbsvolvos · Post by **dbsvolvos** » Fri Jan 07, 2005 1:12 am

theres quite a few piggy backs available for that price - of course MS is still way cheaper than that , and will be a complete standalone system .

480_rocket · Post by **480_rocket** » Fri Jan 07, 2005 12:09 pm

Hey, the megasquirt does ignition now???!

Murf · Post by **Murf** » Fri Jan 07, 2005 12:23 pm

i think theres an add on for it called mega spark that does ignition, could be wrong though!

rpruen · Post by **rpruen** » Fri Jan 07, 2005 12:29 pm

Yep megasquirt and spark. It's a little add on that uses the existing hardware in MS. Unfortunatly it won't directly work on the 480.

It would be nice to have an add-on that will interface with the bosch flywheel sensor. Plus you then get to use the same setup as bosch to do the ignition timing.

Using a counter to count down using the edges of the teeth as a trigger, then a second stage using a hardware clock to get fine control over the timing. The great part is that the ecu cpu only has to output values into the counter circuit when it wants to change the timing. The hardware will use the gap in the ring to reset the counter, so without any input from the cpu the coil trigger signal will arrive at the set value. Changing the couters initial values allows the timing to be set as required.

If I get that bored ever, then I'll make it as an add on to MS, but don't hold your breath, it's not happening any time soon

Richard

dbsvolvos · Post by **dbsvolvos** » Fri Jan 07, 2005 12:30 pm

megasquirt has been doing ignition for over a year now ! - the problem is unless someones decodes the signal from the flywheel and writes software for it - you have to mount a trigger on the front pulley - if you havent noticed , there isnt much room down there .

Of course MS can be used as a piggyback aswell

JohnTurbo · Post by **JohnTurbo** » Fri Jan 07, 2005 2:12 pm

just a shame about the 12month waiting list huh?!

480_rocket · Post by **480_rocket** » Fri Jan 07, 2005 2:33 pm

What are the two types of flywheel on the B18FT? Are they both missing tooth?

Found this http://megasquirt.sourceforge.net/extra ... wheel.html

Megasquirt seems pretty cheap, look on ebay for buying it. Also, you could build it yourself.

rpruen · Post by **rpruen** » Fri Jan 07, 2005 3:16 pm

The two types have a slightly diferent patern, they are both missing teeth.

The MSnS code is doing the same thing as the bosch hardware, except that the hardware triggers on the nearest tooth edge to the ignition point, then there is a short delay to get fine control. The MSnS has a longer variable delay after triggering well back from the spark point.

It does the same thing in the end. The bosch system doesn't use the CPU though, only to put the right numbers in the counters. I think they did that as when the system was designed CPUs where not close to as powerfull as now.

Richard

dbsvolvos · Post by **dbsvolvos** » Sat Jan 08, 2005 2:22 pm

the 12 month waiting list you refer to is a bloke in america who was supposed to be building me two to save time . Anyway - i can get them fully built in about 2-4 weeks if anybody is interested .

Murf · Post by **Murf** » Sat Jan 08, 2005 2:30 pm

cant be too hard to build, they give you the board and all the components dont they? just the maps and getting the car to run that takes all the time

dbsvolvos · Post by **dbsvolvos** » Sat Jan 08, 2005 2:31 pm

and building a wiring harness , and configuring the sensors

Ettore Bugatti · Post by **Ettore Bugatti** » Mon Jan 10, 2005 11:36 am

How would a Megasquirtsystem look and costs as a extra fuel injector controller? I think a MS cost as much as this piggyback sytem when you would use it as a e.f.i.c.
Im after a system where the stock ECU controls the standard boost+ some extra and the add-on controller supply the extra fuel for more boost. The problem only is to keep the stock ECU happy when the boost is beyond it range.

dbsvolvos · Post by **dbsvolvos** » Mon Jan 10, 2005 12:06 pm

Ms is way cheaper than other piggyback systems .

rpruen · Post by **rpruen** » Mon Jan 10, 2005 12:07 pm

Ettore Bugatti wrote:How would a Megasquirtsystem look and costs as a extra fuel injector controller? I think a MS cost as much as this piggyback sytem when you would use it as a e.f.i.c.
Im after a system where the stock ECU controls the standard boost+ some extra and the add-on controller supply the extra fuel for more boost. The problem only is to keep the stock ECU happy when the boost is beyond it range.

Interesting idea. Unfortunatly it isn't that simple

To have the ECU happy with the extra boost means modifying it. If you are going to do that then it's just as easy to have the standard ECUs deal with the extra boost and fuel. It's also likley to work out cheaper to do it that way, you still need the bigger injectors etc. but you don't need any add on boxes to make it work.

The standard ECU will be ok up to 28 psi, after that the resolution of the A/D may well become a problem for the fueling side. The ignition may well go up to 50 psi as it'a a 10 bit A/D (it would mean using a 5 bar MAP sensor)

Richard