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Ross Trigger Kit fault - data log LINK G4+ - hard boost/fuel cut 6kRPM

T.Krol
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T.Krol Apprentice

T.Krol

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Link to Data-log Link G4+ ECU: https://1drv.ms/u/s!An_ML36HZBw-hhz3uvNXSiDLCIZp

 

Hi,

I am having hard boost or fuel cuts at around 6k RPM. First I thought it was due to overboosting (boost cut). But on checking the data log with my tuner we noticed that the trigger kit was having a malfunction during pulls. Boost or fuel is cut very hard. RPM gauge in the car really flips hard bounces back and forward. Red engine light pop-ups. In the data log you see the ECU measures engine speeds of 35k+. So the trigger/crank sensors are having some hard time for some reason.

I have a built engine and head with a full Ross trigger kit.

Hope someone can assist or has experience with this issue and what the possible cause(s) can be.

 

Edited by T.Krol
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  • T.Krol changed the title to Ross Trigger Kit fault - data log LINK G4+ - hard boost/fuel cut 6kRPM
Piggaz Grand Master

Piggaz

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Posted

Check the air gap between the sensor and the wheel. I would put money on it being wrong.

A word of caution. Sort it out ASAP. This is no different to smashing the limiter… and we all know how much RB oil pumps love that. 

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Piggaz Grand Master

Piggaz

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43 minutes ago, T.Krol said:

Hi,

Thanks for the reply. You mean the air gap between the crank sensor and the wheel, just to be sure? I read that it should be 1 to max 2mm for both the crank as for the cam sensor.

 

Thanks.

Correct, the crank trigger sensor and crank trigger wheel.

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BK Grand Master

BK

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Closest you can get without touching is best, so ideally under 1.5mm is recommended. I run a Ross trigger with hall effect GT101s. I have no shims on cam home at the standard set 1.4mm gap and the crank end is shimmed to be about 50 thou, which is about 1.25mm down here.

IMG_20201212_140823_0.thumb.jpg.f3a1ad5dc143ce1730952ed556e06045.jpg

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GTSBoy Grand Master

GTSBoy

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9 hours ago, T.Krol said:

Since the sensor is attached to the closed 'cap' over the cam gearing?

The sensor cannot be mounted onto the plastic cam cover. Not solid enough. Needs to be mounted on a solidly connected bracket. All of that can be put in place without the cover.

If it is like that, and it is under the cover, then the cover needs to come off to check.

If it connected to the cover, then it needs to change. Tout de suite.

Edited by GTSBoy
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T.Krol Apprentice

T.Krol

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Threads at 2 of the 3 locations where you attach the cam trigger cap are not very good anymore. At least not with the bolts (believe m10) that were in there now. One bolt was already loose and when putting the cap back in, I couldn't get a 2nd bolt in. So now I'm stuck with 1 bolt. Can imagine that at high revs this could cause vibrations in the ross cap and thus the cam tooth giving a wrong signal to the sensor. Tomorrow just looking for slightly longer m10 bolts. Air gap of the crank looked very close and oke.

Hope this would fix the issue quit easily but I am not sure.

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T.Krol Apprentice

T.Krol

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Well an update.

The air gaps looked very very close and perfect. Ran the car a bit. Still had the issue. Was about to turn around but decided to do one more 2nd to end 3rd pull. No trigger cuts. Look at the oil temp was around 72c. I have an oil cooler (no AC) behind the intercooler. So oil temps take long time to get up.

Did 10 more pulls 2nd to 4th, no cuts. Would it be possible the engine limit/speed is limited by certain oil temps below 70c?
Makes it even harder to put my finger on the issue. Problem seems to go away when the car is good on temperature.

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Butters Experienced

Butters

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6 hours ago, T.Krol said:

Well an update.

The air gaps looked very very close and perfect. Ran the car a bit. Still had the issue. Was about to turn around but decided to do one more 2nd to end 3rd pull. No trigger cuts. Look at the oil temp was around 72c. I have an oil cooler (no AC) behind the intercooler. So oil temps take long time to get up.

Did 10 more pulls 2nd to 4th, no cuts. Would it be possible the engine limit/speed is limited by certain oil temps below 70c?
Makes it even harder to put my finger on the issue. Problem seems to go away when the car is good on temperature.

From what I saw, Adam had replied to your log suggesting you very much have a trigger issue. He will review the config file for you if you are nice to him.

 

The only time i had a trigger issue with link was when i have a poorly set pin on a deutsch plug. 

 

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T.Krol Apprentice

T.Krol

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4 hours ago, Butters said:

From what I saw, Adam had replied to your log suggesting you very much have a trigger issue. He will review the config file for you if you are nice to him.

 

The only time i had a trigger issue with link was when i have a poorly set pin on a deutsch plug. 

 

If he can that would be awesome ofcourse. I really have no clue what causes it at this point. Id rather pin point it myself with the help of you guys before I drop it off at a shop and they have to spend hours searching..

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Butters Experienced

Butters

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3 hours ago, hattori hanzo said:

had this issue constantly with the ross binned it and went hi octane kit 

I am using an ignite 5.0 and vcam combo on mine. 

 

15 minutes ago, T.Krol said:

causes it at this point. Id rather pin point it myself with the help of you guys befor

Post up your map  *never mind, just looked through your log, trigger errors for sure.

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T.Krol Apprentice

T.Krol

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1 hour ago, Butters said:

I am using an ignite 5.0 and vcam combo on mine. 

 

Post up your map  *never mind, just looked through your log, trigger errors for sure.

Yes trigger errors indeed. Non the less here is the map file. Perhaps someone can see something suspicious.

Thanks for the help so far.

R32 GTR T.Krol G4+ (trigger issue).pclr

Edited by T.Krol
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T.Krol Apprentice

T.Krol

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Hi,

Well I have no idea what the cause might be. Whenever the oil is above 70c and intake temps are above 24-26c I have no trigger issues at all. But when the outside temp is low and intake temps are under 20c and engine oil doesnt come above 62-66c (external oil cooler) I have the trigger issues.

My tuner checked the map and there are no engine oil temp restrictions on power delivery/rpm targets.

Anybody any idea what else could cause this? Feel free to check the mapfile here above.

 

Thanks.

Edited by T.Krol
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