90 bmw 325 m50 swap

[gox]

Something like this?
http://www.d-series.org/forums/diy-forum/95756-diy-electronic-detonation-detection-det-cans-under-25-dollars.html

[gunni]

Doesn´t have to be electronic.

If they are done right you should hear the engine nicely while in the car.

http://passionford.com/forum/technical-essay-archives/85339-how-i-made-my-det-cans.html

[gox]

Great, i wanna try this

[DevInAz]

The rings came in wrong. We should have the correct rings tomorrow and the car should be back on the road by sunday. I have found a local dyno that will do 5 pulls for $75. I'll have pictures up soon.

[DevInAz]

The engine is back in the car. A new manifold was bought for the car and a different intercooler is being used. We are waiting for a welder and piping to build the new downpipe and charge piping.

[GintsK]

Don´t rely on knock sensing to help you.

fabricate some det-cans and use them while tuning. After that you´ll not have knock.

http://www.google.co.uk/search?q=det-cans&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a

There is no guarantee: overheated engine, leaner due pump or fuel deficient problems, worse fuel. Any of these could lead to detonation which was not experienced at tuning.

[gunni]

True, but given that you tune the engine at more the one state (air temp, coolant temp) and so on your air temp ignition correction table will take care of such scenarios and air temp fuel compensation

[DevInAz]

GintsK- your right I wouldn't expect a gaurantee on something like this.

Gunni- Gunni you've been a big help thus far and I hope you keep your opions coming.


speaking of the air temp compensation table, since Vegas is only about 60 degrees right now and 105 in the summer would you recommend a little dyno time to correct for ambient temp swings like that? I think I'll do it anyway. While at the dyno I'm going to try mattaias's idea about doing a pull with and without the air filter to see what kind of restriction if any exists.

[gunni]

Dyno time is of great help with tuning, and using only the least amount of advance required ,

I´d say that you are not going to be det limited below 1.0bar or so. Depending on intercooler setup and ambient air temps.

[DevInAz]

i'll take some pictures as soon as we start building the pipes and post everything up including my dyno sheets and logs. I hope to have all the pipe I need within a few more days.

On the 14th of this month I will also be starting a new project thread for a n/a 91 318 with a m42.

[DevInAz]

The car is now up and running again but I have a quick question about the fuel pump. I'm running 1.1.81. When the car is running and I turn it off the pump keeps running and won't shut off unless I turn the key on and wait 3 seconds. Then I can turn the car off and the fuel pump turns off.

any ideas?  heres my fuel pump settings.  Updates will come in the next few days.

[mattias]

First I would try moving the fuel pump solenoid ground to a free ignition output and see if that makes any difference. The P259 has problems with strong solenoids and you could simply be seeing it bleed through enough current to hold the solenoid closed, and if it does it's about to die (short-circuit to ground).

After that I would double-check all the wiring, sounds like you could have current bleeding through somewhere.

Also, set the fuel pump off delay to 1 sec or less, no need for more.

[DevInAz]

Thanks mattias i'll do that tonight. If its about to die do I just order up a new p259 chip?

[gunni]

If it´s not dead it won´t die if you stop using it for this type of relay.

I´ve not had this problem with M20 or M50 Bosch relays. so might want to have a quick look at the wiring.

[DevInAz]

I found the problem. Some how the Vanos soleniod was keeping the vems and relays turned on. Once I unplugged the vanos everything is working like it should. I'll spend some time figuring the vanos problem out later.

Right now I have a misfire on cylinder 1 to figure out.