Another MS conversion, Progress, at last. Options

[JimN73]

I've been talking to McMark for some time about the MS/ignition upgrade. I decided to to take the plunge a few weeks ago and asked Mark to put it on his schedule.

Jeff (JSConst) had bought a kit from Mark and decided not to use it, so I bought it from him. All of the pieces are together and Mark has time starting on Sunday.

Unfortunately, my time is limited so I may not participate much. I will add updates as I learn of them, or Mark may do that if he has the time.

[JimN73]

Progress!!

In the last week or so Mark and I have made some changes: put in a new fuel pump and filter and straightened out a couple of fuel lines, a new ECU, and new trailing arm bushings.

I think the fuel issue and the ECU have cleared out the background issues and left the real problem clearly in view. Between 2000 and 3000 rpm it bucks. The PW and MAP bounce around a lot. I'm not sure which is the cause and which is the effect.

I have done a lot of reading and made many changes to the tune without ever changing the bucking. Here is the most recent tune and a short log showing the bucking and system changes.

Does anyone have any idea what might be causing this?


https://www.dropbox.com/sh/p593bw6iyebgwjn/bANp3X25ic

Thanks for looking.

[JamesM]

Progress!!

In the last week or so Mark and I have made some changes: put in a new fuel pump and filter and straightened out a couple of fuel lines, a new ECU, and new trailing arm bushings.

I think the fuel issue and the ECU have cleared out the background issues and left the real problem clearly in view. Between 2000 and 3000 rpm it bucks. The PW and MAP bounce around a lot. I'm not sure which is the cause and which is the effect.

I have done a lot of reading and made many changes to the tune without ever changing the bucking. Here is the most recent tune and a short log showing the bucking and system changes.

Does anyone have any idea what might be causing this?


https://www.dropbox.com/sh/p593bw6iyebgwjn/bANp3X25ic

Thanks for looking.

Sweet! logs! ill take a look. Is that the MSQ that was in use when the log was generated?

[JimN73]

Progress!!

In the last week or so Mark and I have made some changes: put in a new fuel pump and filter and straightened out a couple of fuel lines, a new ECU, and new trailing arm bushings.

I think the fuel issue and the ECU have cleared out the background issues and left the real problem clearly in view. Between 2000 and 3000 rpm it bucks. The PW and MAP bounce around a lot. I'm not sure which is the cause and which is the effect.

I have done a lot of reading and made many changes to the tune without ever changing the bucking. Here is the most recent tune and a short log showing the bucking and system changes.

Does anyone have any idea what might be causing this?


https://www.dropbox.com/sh/p593bw6iyebgwjn/bANp3X25ic

Thanks for looking.

Sweet! logs! ill take a look. Is that the MSQ that was in use when the log was generated?

Yes. Thanks.