Data Logging

[mfp4073]

Can anyone tell me whats involved in data logging, how much is it likely to cost and where can I get it done?
I live in the Cleveland area and I'm not aware of anyone around here that could do the job.

Thanks, John

[stevieturbo]

mfp4073 said:

Can anyone tell me whats involved in data logging, how much is it likely to cost and where can I get it done?
I live in the Cleveland area and I'm not aware of anyone around here that could do the job.

Thanks, John

Depends exactly what you want to log and for what reason.

Very basic info can be logged with cheap OBD readers and apps or PC software.

If you have any of the tuning software, that will allow you to log more data, and at a more sensible, ie faster rate.

[mfp4073]

I'm just trying to sort out a slight low speed surge that's been driving me nut's . I have done all the usual check and just changed the o2 and coolant sensors, I even pulled the PCM fuse ect. But nothing seems to work.
So I thought instead of throwing parts at it, a rolling road and data log the bloody thing might point me in the right direction.

John

[Mud_]

Is it a standard car? Cleaned the MAF?

[mfp4073]

The Maf was really clean when I checked, I even disconnected it, and the problem remained. i have replaced the plugs and leads, and checked for air leaks.
The car has a full exhaust and remap. It starts on the button, and it idles without any issues.
I wounder if it is just a trait of the LS1 or a slight fueling problem?

john

[stevieturbo]

mfp4073 said:

I'm just trying to sort out a slight low speed surge that's been driving me nut's . I have done all the usual check and just changed the o2 and coolant sensors, I even pulled the PCM fuse ect. But nothing seems to work.
So I thought instead of throwing parts at it, a rolling road and data log the bloody thing might point me in the right direction.

John

It could be very difficult to recreate the driving conditions that reveal this problem on a rolling road so I'd be cautious about taking that approach, as it could very easily be money wasted.

Also, has it always done this, or is it something that starter recently ?

Or did it do this before the remap, or only after ?

[mfp4073]

stevieturbo said:

It could be very difficult to recreate the driving conditions that reveal this problem on a rolling road so I'd be cautious about taking that approach, as it could very easily be money wasted.

Also, has it always done this, or is it something that starter recently ?

Or did it do this before the remap, or only after ?

I have had the car for 8yrs and as far as I can recall it has always had this surge, and it was totally stock back then.
I was hoping the remap would have sorted it.

[Mud_]

mfp4073 said:

I have had the car for 8yrs and as far as I can recall it has always had this surge, and it was totally stock back then.
I was hoping the remap would have sorted it.

I think you would have been lucky for the remap to fix the surge unless you specifically had the tuner look at it.

If it's the sort of surge that a cam usually induces, then the usual advice is to look at throttle cracker and spark. I would be surprised if your remap touched cracker since there was no cam involved. You might be able to effectively map the surge out, but my recollection of the stock cam was zero surge, which makes me wonder if mapping it out is just masking a problem. Sounds like you need a pro.

[mfp4073]

Mud_ said:

I think you would have been lucky for the remap to fix the surge unless you specifically had the tuner look at it.

If it's the sort of surge that a cam usually induces, then the usual advice is to look at throttle cracker and spark. I would be surprised if your remap touched cracker since there was no cam involved. You might be able to effectively map the surge out, but my recollection of the stock cam was zero surge, which makes me wonder if mapping it out is just masking a problem. Sounds like you need a pro.

I thought a remap would have sorted out the whole lot TBH, but then again my Knowledge in this area is....zero.
Thanks again.

John

[stevieturbo]

If a complete re-tune didnt sort it or even change it, that would imply the fault is with the car itself.

Unless the re-map wasnt to improve performance and driveabilty...which would be odd. Often re-maps are to resolve issues such as you describe.

Logging may reveal something, or it may not. Dont forget, logging is one part, finding someone able to interpret any data to make it useful is another and any anomalies may be very small.

I'd hold back on spending any money on rolling road time though until you do get someone with experience to have a look/drive at it on the road to see what they think.

[Mud_]

mfp4073 said:

I thought a remap would have sorted out the whole lot TBH, but then again my Knowledge in this area is....zero.
Thanks again.

John

I only know what I've gleamed doing mine. Ideally you want an informed opinion as to whether you have a problem, and if so the likely cause.

There are a few other air tables worth playing with for surge too (airflow correction ones), but again unlikely to have been touched unless you had a reason. I say this for completedness, I don't think it's necessarily going to help!

[mfp4073]

Thanks all, I think I will ask MF to take a look and see if they can sort it out.

John

[rich24v]

mfp4073 said:

The Maf was really clean when I checked, I even disconnected it, and the problem remained. i have replaced the plugs and leads, and checked for air leaks.
The car has a full exhaust and remap. It starts on the button, and it idles without any issues.
I wounder if it is just a trait of the LS1 or a slight fueling problem?

john

Not sure if you are describing the same thing, but, when I had a cv8, pulling up to roundabouts and junctions, the engine would overrun a bit.
I found it slightly un-nerving.
Turned out it was a function of the "cracker" table in the tune.
I bought efilive from ringram, he modified the table there and then for me.
It felt much better afterwards.
I imagine your remap would have concentrated on spark and fueling tables....

[mfp4073]

rich24v said:

Not sure if you are describing the same thing, but, when I had a cv8, pulling up to roundabouts and junctions, the engine would overrun a bit.
I found it slightly un-nerving.
Turned out it was a function of the "cracker" table in the tune.
I bought efilive from ringram, he modified the table there and then for me.
It felt much better afterwards.
I imagine your remap would have concentrated on spark and fueling tables....

Thanks rich24v,

This sounds interesting, my cars does over run at junctions ect, but the actual surge comes in on a very light throttle around town, even when off the gas. It's not severe but it's there. I guess most people would just live with it, but I like things to run right.
I have taken the car off the road for now, but i'm hoping to get a new throttle body next year and see if that sorts it out.
I have no idea what a cracker table is,or even how to sort that out. The remap I had done was a Wortec tune for a 05 Monaro.
I would be great if I could tune out the issue without masking over it, if you see what I mean.

John

[stevieturbo]

If it is a tuning issue, really any remap should have taken care of it. The whole point of re-maps is to improve and fix any nasties within the OEM setup which has more constraints applied to it with regards emissions etc.

Is the same issue persistent in other vehicles of same era etc ?