Lund tune bugging me

[Forestlump]

I switched from Lund to Wengerd and have hit the same 60-130 but with an extra 2000ft DA, have more *consistency* from run to run (this is a big deal, imagine going from 6.0 to 6.8 just minutes apart...), and the drivability is far superior.

My main reason for switching was surging and bucking in part throttle. It never felt like I had good control over the pedal. With Wengerd's tune, it feels like I'm driving any other car if you get what I mean. The pedal feels intuitive and predictable.

All of that to say, it's not that my Lund tune was slow or didn't perform well at WOT. My lambdas looked fine, similar to Wengerd's I believe (0.75-0.8 if I recall correctly). But Wengerd's is better both part throttle and wide open.

Brilliant thanks this is exactly what I'm looking for.

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[Zrussian13]

im a nobody. They always reply within the same day or before 9 next day. And I’ve dealt with basically everyone that’s there besides Dakota I think.

Dakota is my personal favorite. He put a lot of work into my NA and original TT tunes. I wanted him again when I returned but got Alex. It was definitely a different level of service between the two.

 

[Forestlump]

Sounds like they got tired of you nitpicking and dealing with your monkeyed up MAF setup

There was no nit picking, I paid about 1200 dollars for them to remote tune my car.
They did that in 4 revisions, when I asked for a lower idle, The response was, we will but if you get stalls we will have to put it back up. He didn't want to take the time to get it right, just mask the issue with a higher idle.
The revision they sent had a hunting idle. I replied with a description + video and log. They couldn't see the problem, said it was just going on to different spark tables?

I went back to the earlier revision and have lived with the higher idle, though not happy about it.
Several times a week I get this lurch/stumble when at transient throttle, that's annoying as fuck as the whole drive train will clunk, like a mini with knackered engine mountings.

The Maf changes made the Maf table different, that was easy, they re did those a week after the initial tune and was seamless.

The other issue was it being over rich, even back then I could tell it wasn't bang on, puffs of black smoke on gear changes. My AFR is all over the place on the dash, see between 9 and 16 afr at steady throttle, was told this will settle but it never has. I just don't look at it anymore.

Since then I've gone catless/ headers, 3" exhaust and I get black carbon over the rear bumper so it's rich at some point!

Traction control is shot to pieces, hardly ever comes on, even if the tyres are being blown off.

I've got the car to a pretty good state of performance with brakes, wheels, tyres, suspension mods and changes. Obviously I'm in it for £20k of mods + my time and the next thing to do is get the tune right. If It cost me another 600 dollars it will be well worth it.

I'm not interested in max hp for 9 seconds, I want drivability, accurate throttle response, working TC, decent mpg for driving on the road and repeatable throttle pedal feel so that I can reliably control 700+hp whilst exiting a corner in a slide. Hence the Maf improvement (Monkeyeyed must be what every car manufacture does to their mafs then? and some aftermarket mafs that read smoother data).

You might not care for finesse if all you do is drag race but I'm afraid mate, it was my money that they happy accepted and so they should have tailored the product to me. After all it was a custom tune that I paid for.

 

[2019GT]

Dakota is my personal favorite. He put a lot of work into my NA and original TT tunes. I wanted him again when I returned but got Alex. It was definitely a different level of service between the two.

I agree. Dakota is pretty thorough too. I asked him to give me the gear indicator full time as part of my request, and he didn't miss that for example.

Also an interesting observation I made between Dakota and Alex is the size of their tune files. Dakota's were about 2.8MB while Alex's are 7.8MB. That's on the nGauge, but I wonder why Alex's tunes are so much larger. They take forever to install compared to Dakota's.

 

[robvas]

The revision they sent had a hunting idle. I replied with a description + video and log. They couldn't see the problem, said it was just going on to different spark tables?

I went back to the earlier revision and have lived with the higher idle, though not happy about it.

Since then I've gone catless/ headers, 3" exhaust and I get black carbon over the rear bumper so it's rich at some point!

How high was your idle that they set and where did you want it set at?

And it's that rich and not fouling plugs?

 

[Forestlump]

I switched from Lund to Wengerd and have hit the same 60-130 but with an extra 2000ft DA, have more *consistency* from run to run (this is a big deal, imagine going from 6.0 to 6.8 just minutes apart...), and the drivability is far superior.

My main reason for switching was surging and bucking in part throttle. It never felt like I had good control over the pedal. With Wengerd's tune, it feels like I'm driving any other car if you get what I mean. The pedal feels intuitive and predictable.

All of that to say, it's not that my Lund tune was slow or didn't perform well at WOT. My lambdas looked fine, similar to Wengerd's I believe (0.75-0.8 if I recall correctly). But Wengerd's is better both part throttle and wide open.

I think this surging/ bucking at part/ transient throttle is what I have too, I've learnt to not use that part of the throttle by either getting off it or on it further. But sometimes itl catch me out. It's not detrimental, just annoying. My wife drove it the other day whilst I held on to the B pillar whilst on my bike. She was at that part of light throttle thats affected and it was like a bucking bronco, I shouted at her to stop it! She said she couldn't, it was the car doing it.

I know what you are talking about with your difference in times.

 

[Forestlump]

It

How high was your idle that they set and where did you want it set at?

And it's that rich and not fouling plugs?

can be rich and not foul plugs you know, it's obviously not grossly out by that much. But it's not spot on either.

Here's the video of the log after lower idle,
that's not me shaking the camera, it's the engine hunting.

Idles around 900rpm
I asked for 800 like stock.

They couldn't see anything wrong with this so I gave up pushing and went back to the higher idle

 

[Forestlump]

But anyway none of this detail matters, I'm not happy with it, I don't want to go back to them.

Thanks to everyone who has shared their opinion and helped. It's given me a few options to pursue.

 

[Wolfys11]

There was no nit picking, I paid about 1200 dollars for them to remote tune my car.
They did that in 4 revisions, when I asked for a lower idle, The response was, we will but if you get stalls we will have to put it back up. He didn't want to take the time to get it right, just mask the issue with a higher idle.
The revision they sent had a hunting idle. I replied with a description + video and log. They couldn't see the problem, said it was just going on to different spark tables?

I went back to the earlier revision and have lived with the higher idle, though not happy about it.
Several times a week I get this lurch/stumble when at transient throttle, that's annoying as fuck as the whole drive train will clunk, like a mini with knackered engine mountings.

The Maf changes made the Maf table different, that was easy, they re did those a week after the initial tune and was seamless.

The other issue was it being over rich, even back then I could tell it wasn't bang on, puffs of black smoke on gear changes. My AFR is all over the place on the dash, see between 9 and 16 afr at steady throttle, was told this will settle but it never has. I just don't look at it anymore.

Since then I've gone catless/ headers, 3" exhaust and I get black carbon over the rear bumper so it's rich at some point!

Traction control is shot to pieces, hardly ever comes on, even if the tyres are being blown off.

I've got the car to a pretty good state of performance with brakes, wheels, tyres, suspension mods and changes. Obviously I'm in it for £20k of mods + my time and the next thing to do is get the tune right. If It cost me another 600 dollars it will be well worth it.

I'm not interested in max hp for 9 seconds, I want drivability, accurate throttle response, working TC, decent mpg for driving on the road and repeatable throttle pedal feel so that I can reliably control 700+hp whilst exiting a corner in a slide. Hence the Maf improvement (Monkeyeyed must be what every car manufacture does to their mafs then? and some aftermarket mafs that read smoother data).

You might not care for finesse if all you do is drag race but I'm afraid mate, it was my money that they happy accepted and so they should have tailored the product to me. After all it was a custom tune that I paid for.

Black bumper will always happen, but after a span of a couple months buildup

ask how i know

 

[Wolfys11]

I think this surging/ bucking at part/ transient throttle is what I have too, I've learnt to not use that part of the throttle by either getting off it or on it further. But sometimes itl catch me out. It's not detrimental, just annoying. My wife drove it the other day whilst I held on to the B pillar whilst on my bike. She was at that part of light throttle thats affected and it was like a bucking bronco, I shouted at her to stop it! She said she couldn't, it was the car doing it.

I know what you are talking about with your difference in times.

On my wengerd tune, ive never experienced this, once every like month il feel a ever so slight bump at 1200 rpm but i think all centri will have a tiny hiccup this minor

i also dont have imrc locked out

 

[cbrtrx]

There should be no surging, hunting, bucking, bumping or anything. It's not hard to make a centri car drive even better then stock. I set all idle rpms to 750 and they are rock solid, no stalling no issues. Assuming you don't have a hardware issue something is up with the tune.

If you feel Lund isn't giving you the customer service you desire then choose another company.

 

[SolarFlare]

Dakota is my personal favorite. He put a lot of work into my NA and original TT tunes. I wanted him again when I returned but got Alex. It was definitely a different level of service between the two.

Dasan was probably my favorite to deal with, but he's no longer with us.

 

[K4fxd]

OP I did not read all the pages but your problems are from the way Lund uses the cams at part throttle.

I have a few Lund tunes that are unlocked so........

I don't have any unlocked Wengerd tunes but from the feedback on this board of his tunes, I think he does a better job at driveability.

 

[WildHorse]

OP I did not read all the pages but your problems are from the way Lund uses the cams at part throttle.

That's because AFAIK LUND doesn't touch the exhaust cams.
Maybe Wengerd & others do, or maybe they really don't touch
either cams much at all.

 

[shogun32]

I don't have cats,

dogs, then?
Please no Poodles, only proper Irish Setters/Terrier. I will also allow a proper English Bulldog.

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