JUBU and other topics, a combo thread

[TFS]

Im not an IT nerd and dont know to work around that, but its defo not 7200 and jubu could not change the display settings. Maybe the car itself has a max display setup at 7000 which it can show I dont know. But anything beyond that will show RED that I do know 100% as I had the jubu and it was one of the first disappointments already when I had received it which could not be fixed!

 

[JonFuller]

I repeat, 'Does your display still show a 6800rpm redline with the Syvecs/JUBU 440 ecu???'

 

[TFS]

I repeat… it DOES NOT show 7200rpm

 

[Steve24]

Ummm. So what does it show?

If it can’t be changed, it must show 6800, right?

 

[JonFuller]

I repeat… it DOES NOT show 7200rpm

I think you're right that it shows 7k, and not 7200.

I cannot check right now, as the ecu in question is back with JUBU at the moment, getting some mods, inc a cruise control functionality update, and an exhaust valve control behaviour change (it was loud in all 3 driver modes, which I didn't like), and these changes required them to open the ecu, so they needed to physically have it, rather than doing a remote session.

My point is that the engine ecu can/does change the display, and yes, 'maybe' there is some strange limit within the screen control module that means 7k is the max it can display, but the Syvecs ecu definitely 'changes' the redline display and other aspects of the driver display, it does not show a 6800rpm redline with the Syvecs ecu installed.

I wasn't particularly bothered by the display redline, as it wouldn't be the first time in my life I had pushed a tacho needle into the red on one vehicle or another. As long as the engine will do what it's supposed to, I'm happy.

I concede it would be 'nice' if the driver display graphics mirrored the actual redline, but it's not the end of the world, at least not for me.

The original statement from VF was, 'The dash will still show 6800 because that CANNOT be changed'. This is not correct, and is what I argued against.

As I said, good luck with the tune, I hope it pans out well.

 

[VF Tuner]

I think you're right that it shows 7k, and not 7200.

I cannot check right now, as the ecu in question is back with JUBU at the moment, getting some mods, inc a cruise control functionality update, and an exhaust valve control behaviour change (it was loud in all 3 driver modes, which I didn't like), and these changes required them to open the ecu, so they needed to physically have it, rather than doing a remote session.

My point is that the engine ecu can/does change the display, and yes, 'maybe' there is some strange limit within the screen control module that means 7k is the max it can display, but the Syvecs ecu definitely 'changes' the redline display and other aspects of the driver display, it does not show a 6800rpm redline with the Syvecs ecu installed.

I wasn't particularly bothered by the display redline, as it wouldn't be the first time in my life I had pushed a tacho needle into the red on one vehicle or another. As long as the engine will do what it's supposed to, I'm happy.

I concede it would be 'nice' if the driver display graphics mirrored the actual redline, but it's not the end of the world, at least not for me.

The original statement from VF was, 'The dash will still show 6800 because that CANNOT be changed'. This is not correct, and is what I argued against.

As I said, good luck with the tune, I hope it pans out well.

My statement was I have not confirmed about the dash. Don’t twist my statement and if you just wanna talk about JUBU then go make your own thread and stop spamming up mine please.


And I think you and I are not talking about the same thing anyway. The dash will show the higher rpm, but if you’re saying it MOVES the coloring on the display so that “red” is only after 7200 then I’d like to see proof because everyone else with those ecus say otherwise.

So show proof.

 

[NJemira85]

I’m not a scientist, but it seems like one way to prove the jubu car changes redline would be to post a photo….

 

[hellasf1]

I have posted this so many times in he other threads but lots of things get lost in here sometimes.

The dash will only show 7k at the “redline” but you can surely take it to 7200. It’s not hard to know where it’s at when you do it often. I personally love shifting right at 7k I might be doing 7100 but it feels great to me and I have a soft limiter thankfully.

Stock 6800 felt like it kicked in at 6600 I really hated that part a lot. If I couldn’t fix that I was going to sell the car. I’ve had cars that were 6800 the Emira for some reason didn’t feel close to that 6800 IMO.

 

[NJemira85]

I have posted this so many times in he other threads but lots of things get lost in here sometimes.

The dash will only show 7k at the “redline” but you can surely take it to 7200. It’s not hard to know where it’s at when you do it often. I personally love shifting right at 7k I might be doing 7100 but it feels great to me and I have a soft limiter thankfully.

Stock 6800 felt like it kicked in at 6600 I really hated that part a lot. If I couldn’t fix that I was going to sell the car. I’ve had cars that were 6800 the Emira for some reason didn’t feel close to that 6800 IMO.

Appreciate you. I was sort of trying to quietly make the point that an open ended debate about something readily visually observable / recordable was perhaps not the best use of energy.

ie it’s either there or it’s not, visually. I have no doubt your car revs to 7200 as advertised and as you’ve said and I am v jealous !!

 

[hellasf1]

Appreciate you. I was sort of trying to quietly make the point that an open ended debate about something readily visually observable / recordable was perhaps not the best use of energy.

ie it’s either there or it’s not, visually. I have no doubt your car revs to 7200 as advertised and as you’ve said and I am v jealous !!

Yeah my observation about how I felt stock cut out sooner than 6800 was bc when I went to 7200 it felt so much longer. Like 600 rpm more than the 400 more. I wish we had analog gauges to really tell more.

I think that’s why I feel great at 7k bc it feels like that’s the sweet spot.

 

[NJemira85]

Yeah my observation about how I felt stock cut out sooner than 6800 was bc when I went to 7200 it felt so much longer. Like 600 rpm more than the 400 more. I wish we had analog gauges to really tell more.

I think that’s why I feel great at 7k bc it feels like that’s the sweet spot.

The hard cut is brutal and the car clearly misses the stolen rpms vs evora.

Perhaps once my warranty expires, I will experiment with Valvetrain upgrades to explore redline frontier

 

[RoryBellows]

The hard cut is brutal and the car clearly misses the stolen rpms vs evora.

Perhaps once my warranty expires, I will experiment with Valvetrain upgrades to explore redline frontier

Im pretty sure your warranty is already F'd.

 

[Tomwa]

Yeah my observation about how I felt stock cut out sooner than 6800 was bc when I went to 7200 it felt so much longer. Like 600 rpm more than the 400 more. I wish we had analog gauges to really tell more.

I think that’s why I feel great at 7k bc it feels like that’s the sweet spot.

I'm not sure you can really compare the rev characteristics of one motor to any other.

Things that affect rev speed
-weight of pistons and rotating assembly
-number of cylinders
-piston stroke
-mechanical resistance of valve train
-Cam profile
-intake runner optimization
-flywheel and clutch assembly weight
-power generated during combustion cycle
(To include fueling and timing)

Also, you can have an "analog dial" in a gauge cluster, but ultimately it's still reading some form of digital signal and will have some kind of motor which is controlling the needle sweep speed.

I don't particularly like the seemingly apparent "lag" in the display cluster, but you absolutely can have the same phenomenon in a circular needle gauge.

 

[NJemira85]

I'm not sure you can really compare the rev characteristics of one motor to any other.

Things that affect rev speed
-weight of pistons and rotating assembly
-number of cylinders
-piston stroke
-mechanical resistance of valve train
-Cam profile
-intake runner optimization
-flywheel and clutch assembly weight
-power generated during combustion cycle
(To include fueling and timing)

Also, you can have an "analog dial" in a gauge cluster, but ultimately it's still reading some form of digital signal and will have some kind of motor which is controlling the needle sweep speed.

I don't particularly like the seemingly apparent "lag" in the display cluster, but you absolutely can have the same phenomenon in a circular needle gauge.

This is all true but the needle sweep is sexier. Like a mechanical watch vs an apple watch. I would pay for an analog dash that actually displayed genuine sensor data instead of a prerecorded temp mpeg episode

 

[ECU_Komo-Tec]

You nailed it right on the head. I’ve been working with JUBU since I opened the forum and did our group buy last year. Yes the first batch had software issues but we were the first. They flew out to each of us and fixed it. I have a long write up you can read all about it on the JUBU Group Buy 15% forum.

These guys know this car better than lotus themselves. They just did a 600 cs for a customer in Canada and they shop was calling them machines how precise, accurate and phenomenal they are.

I agree we as Americans complain about a lot especially when it’s overseas and so expensive. But you get what you pay for and they are really great people who love what they do. They don’t own the cars we have, they don’t flash money around as if they are “just trying to sell you parts” The owner came out when they flex out to fix the issues and they just want to ensure your happy with your set up.

But everything I’ve bought from them when a shop looks at it they are amazed at the craftsmanship and quality.

I’ve said it on other forum and I will say it again JUBU is for people who our serious about their build and care about quality over quantity it’s that simple.

They are not the only ones to do the 600 HP builds.... nothing big to brag about to be honest...

 

[hellasf1]

I'm not sure you can really compare the rev characteristics of one motor to any other.

Things that affect rev speed
-weight of pistons and rotating assembly
-number of cylinders
-piston stroke
-mechanical resistance of valve train
-Cam profile
-intake runner optimization
-flywheel and clutch assembly weight
-power generated during combustion cycle
(To include fueling and timing)

Also, you can have an "analog dial" in a gauge cluster, but ultimately it's still reading some form of digital signal and will have some kind of motor which is controlling the needle sweep speed.

I don't particularly like the seemingly apparent "lag" in the display cluster, but you absolutely can have the same phenomenon in a circular needle gauge.

Comparing same motor different ECU and tuning. I know others have complained about the hard cut off and feel it cut before the “6800” dash redline digital reading.

Yes we can get in the weeds with many things here but could be sensor data accuracy so digital or analog wouldn’t matter if it’s not accurate to start with.

Some people can tell the smallest difference in changes while others might be more numb to it. I am very sensitive to changes and it’s 1 aspect I’ve seen a great change from stock to tuned. I think right now my rpm redline feels ever bit of 7200rpms, stock I felt like it was more at 6600. Hence why I usually feel and shit at 7k not 7200 bc the gain I got feels like 600 more rpms rather than 400. That’s my feeling taking it for what it is.