Revo stage 1 linear map - flat spot? - Solved

[dj_troopa]

Mods: Revo stage 1 linear map, MTC intake (to be replaced with Revo intake this weekend!)

Hi everyone

I got the Revo stage 1 linear map on my Cupra K1 a couple weeks ago.

On the way home i noticed i got a flat spot at 4k revs. At 4k the boost tails off for a second and then kicks back in again and carries on as it should.

It's been 2 weeks now and it seems to be getting worse. I was only getting this flat spot at 4k in 4th gear when i had it done but now i'm getting it in 3rd and 5th.

I've seen posts where this is a common issue for stage 2 cars but i haven't seen anything for stage 1 cars. It's really starting to do my nut in now!

I spoke with my Revo dealer who suggested the fuel may need turning down. I just want to know if anyone else here has experienced this and how it was resolved? I don't want this to become a guessing game and turn out to be a waste of time and money.

Thanks all!

Ajay

 

[richicupra]

A good idea would be to get a dyno print out and check what's going on

 

[banksy21]

doing some logs with vcds would be better

 

[Marshall]

Do you know what settings your car is running?

 

[dj_troopa]

Hi guys

So i got hold of an SPS device yesterday and decided to check everything out.

The figures from the ECU displayed:

Boost - 7
Timing - 6
Fuel - 3

I've read online alot of people run Fuel 7-9. Seeing Fuel set to 3 made me wonder that's why i'm getting flatspots. I always use V Power and was told the map was set for good fuel like V Power.

I spoke to my Revo dealer who advised to change the settings to:

Boost - 6
Timing - 5
Fuel - 8

The car is running much better now, no flat spots which was the main thing!

Any other suggestions/comments welcome.

Thanks!

Ajay

 

[Big Lee M]

You've paid a Revo dealer and they let you take you're car away when it's not running right? That's crap if you ask me. You should speak to Revo HQ and see what they have to say about it.

 

[Marshall]

If your running a standard fuel pump then I'd stick with fuel 9
Something like boost 7 timing 5 fuel 9

 

[dj_troopa]

You've paid a Revo dealer and they let you take you're car away when it's not running right? That's crap if you ask me. You should speak to Revo HQ and see what they have to say about it.

Yeah i understand. I felt a bit crappy about the situation since i had it done, it's not like Revo is the cheapest either.

If your running a standard fuel pump then I'd stick with fuel 9
Something like boost 7 timing 5 fuel 9

Thanks Marshall. I also saw other people run Fuel 9 and you mentioned it in an old topic i found through searching the forum.

Car still has standard fuel pump so i'll set Fuel to 9 then. What happens if fuel is set too low like mine was originally set to 3?

Had a good few blasts last night in all gears and no flatspot issues, pulls alot harder towards top of rev range! Should i increase Boost from 6 to 7 aswell?

 

[Marshall]

Revo stage 1 linear map - flat spot?

With the fuel set at 3 that's asking for a richer AFR which isn't achievable on standard fuel pump.
Your flat spot would be the ecu holding it back due to fuel pressure not being maintained

On stage 1 I ran boost 7 which was noticeably better.
Stage 2+ boost 8 is best for me.
It's just personal choice mate.

 

[dj_troopa]

No wonder why i had flat spot issues and the car didn't feel so great all the time.

I'll change the settings later and let you know how i get on. Going to put my Revo intake on tomorrow, i don't have to change any settings after i install that do i?

Thanks for the help appreciate it!

 

[Marshall]

No mate
The ecu will adapt itself so no need to alter anything

 

[dj_troopa]

So after changing the settings and adding the Revo intake today i'm now on:

Boost - 7
Timing - 5
Fuel - 9

I hit a flat spot in 5th gear at 4k. I've also noticed if i accelerate in 4th gear and it reaches around 4k there's no flat spot like 5th gear, but the revs jump a little bit towards 5k but it still pulls well.

It's really starting to annoy me now seeing as i've had issues since i've had the map done. The car was fine with no map, never experienced any issues, hence why i thought a map should be good for it!

What a pain in the ass

 

[Big Lee M]

Take it back and get it sorted or contact Revo HQ as you know it's not right and you're not happy. A map will highlight any problems that was little before, I.e if you had a little air leak that you didn't really notice will be a more noticeable now as there is more pressure.

 

[Dan FR]

Put the settings back to how they were when it was working well, and log data..... lots of data....

Then try and up it (if safe to do so), and again.... log data. Data logging will tell you what your issue is if you know how to interpret it.

If you cant do this or dont know how, stop messing with it and leave it to a Revo dealer to set up

 

[WeeG]

Take it back and get it sorted or contact Revo HQ as you know it's not right and you're not happy. A map will highlight any problems that was little before, I.e if you had a little air leak that you didn't really notice will be a more noticeable now as there is more pressure.

Try some new spark plugs

 

[dj_troopa]

Thanks for the replies. I'm not messing with it much, for a start Fuel setting on 3 by the Revo dealer, that's more of a mess!

Wee G - I thought about sparks and maybe trying the cooler ones people use when mapped.

Going to call Revo now.

Thanks all, appreciate the help!

 

[Dan FR]

Fuel setting 3 isn't categorically a mess. It's leaner than standard but not as lean as the map will allow and what is best in terms of power/performance. The map should be written within the confines of the OE HPFP, you will need to check with VCDS whether the OE HPFP is failing to meet the fuel requirements.

 

[dj_troopa]

Cheers Dan.

Spoke with Revo who advised a stage 1 mapped Cupra should be Fuel 7-9. They're now going to find out what file was used on the car and make sure it isn't an old version of their map.

I'll keep this topic updated in reference for others.

 

[dj_troopa]

UPDATE:

On Thursday night i realised doing a good drive on a bypass or motorway shows no problems with the car and it's fantastic through all gears! It's until i get into town slowing down, stopping & starting, then it starts playing up when i give it a boot straight after.

I was invited by my Revo dealer to attend Regal Autosport on Friday just gone for a logging session on their rolling road to investigate the flatspot issue. The car ran perfectly fine and was told it's a very healthy example! No flatspots came up during the logging session, in fact no problems came up at all!

So i took my Revo dealer for a drive down the motorway and it did a very light flatspot, not as bad as it usually does, but this one wasn't so noticeable. I told him it runs fine when doing 50-70mph a for a little bit and it doesn't miss a beat. He then logged intake temps which showed were pretty high, almost into the protection zone where it would hold back and cause a flatspot!

Conclusion? Time for an upgraded intercooler!

 

[Dan FR]

What were the IAT's? Easy way to verify it would be to monitor IAT's and see if the car is only playing up when the IATs get very high.