8 psi on GT28RS

[a96bimmerm3]

Originally Posted by mtuning3

we dont whant to pull out graph until the tuning is done right and the car is runing smooth

We want to know whats going on so we know what is happening and how to fix it. If you're having ignition problems, maxing out the injectors, blowing out the spark, running out of fuel pump, etc. etc. You keep answering with these tiny little simple sentences. Helping the community is mapping your journey, not just claiming things.

[jcap287]

I have to agree with a96bimmerm3, the posts are pretty much useless with the stuff you're giving us. We need some serious hard information with graphs, exact problems etc. We aren't trying to be mean by telling you this over and over like broken records. You might be taken more seriously though by just doing what we ask.

[dtsoccer6]

Originally Posted by jcap287

I have to agree with a96bimmerm3, the posts are pretty much useless with the stuff you're giving us. We need some serious hard information with graphs, exact problems etc. We aren't trying to be mean by telling you this over and over like broken records. You might be taken more seriously though by just doing what we ask.

True story.

This week sometime I'm going to meet up with him, I'm not as busy with school being almost done.

[a96bimmerm3]

Originally Posted by dtsoccer6

True story.

This week sometime I'm going to meet up with him, I'm not as busy with school being almost done.

It's not that I don't believe him, that doesn't matter. If you go for a drive and its fast thats lovely. It's just that this thread has been ABSOLUTELY useless to the community and board as a whole because he says "oh we have issues at 16psi." It would actually help to have the issues described and more detail then a 6 word post about his stuff and how its "almost running." If he doesn't understand whats going on with the car, I can understand, but even a list of the symptoms. It's getting old. I know I sound like a broken record, but come on! This is getting ridiculous.

[orangecrush]

I've been reading all M3's threads and like many of you, know nothing. It is obvious from his posts that he didn't do well in school. It is also obvious he's not mechanically inclined thus the reason why he can't explain anything. (I'm talking theory of mechanics, not the ability to bolt some parts on)

You won't get an answer as to what exactly is wrong because he knows only what the tuner tells him. (ie. it's lean above a certain rpm, the fuel injectors aren't keeping up, etc, etc)

If he was in the "know" like some of you guys, he could give a better explanation of what is wrong and why. I'm sure the tuner will tell him what he needs to do next. It's going to be a lot of trial and error.

How do I know? Because he's going through the same crap I went through when I installed a blown bigblock in an S10 and kept the stock ECU. Or when I tried to tune a blown 306 in a Miata... or the time another miata was at the dyno for 8 months getting tuned!!! (still never got it, had to sell the sc separately)

I can turn a wrench, make parts with what materials I have, much like the rest of you guys... I've been doing it for almost 30 years.

Having said all this.... his explanations suck, his descriptions and inability to share with the community simply sucks.

What doesn't suck is he one of the first to achieve this. He's obviously going to run into problems. We can't get any of our famed tuners to retune a stock R56, how the hell do we expect someone to rewrite a tune for an engine that is demanding so much more than a stock R56?

I personally think you're going to be beating your head for quite a while.... I'll bet you're tuning for at least another month or so before you get it close. And even at that, you may not get it perfect.

Nonetheless, congrats on your efforts, try to keep everyone in the loop. There are some extremely knowledgeable and talented people on this forum that could help you get your beast running perfectly.

Good luck...

<off my soapbox>

Mark

[coopman7]

mtuning3 - what is the problem ? Let everyone know..

We are all here for the same reason and everyone loves what mtuning has done to his car thus far, him and Xalia in Greece are the only 2 to have shown us pictures and videos of a big turbo setup and its amazing however mtuning3 could share alot more info, regardless of his level of understanding, he will know why they cannot go past 16 psi.

PS Xalia is running 16psi on his gt2560r without tuning

[mtuning3]

the issue we having right now its passed 16psi the car cuts power aroud 5000rpm,but no ignition pull ,afr is good in the low 11,the trottle plate just closes half way?up to 16psi the car runs verry strong al the way up until the rev limiter and xalia runing with is gt 25 witout any kind of tuning is suicidle,the stock afr is creasy lean as it is but the gt 28 is making much more volume than the gt 25

[a96bimmerm3]

Originally Posted by mtuning3

the issue we having right now its passed 16psi the car cuts power aroud 5000rpm,but no ignition pull ,afr is good in the low 11,the trottle plate just closes half way?up to 16psi the car runs verry strong al the way up until the rev limiter and xalia runing with is gt 25 witout any kind of tuning is suicidle,the stock afr is creasy lean as it is but the gt 28 is making much more volume than the gt 25

Finally a good post
Have you logged maf values to see if the car is pegging the maf? Also, if the stock MAP sensor is anything like the vw it reads up to 24ish psi, it could be getting to the upper threshold of that and slamming shut. Hmmm. Any codes or DTCs?

[mtuning3]

no codes at all

[NajaNaja]

Originally Posted by coopman7

mtuning3 - what is the problem ? Let everyone know..

We are all here for the same reason and everyone loves what mtuning has done to his car thus far, him and Xalia in Greece are the only 2 to have shown us pictures and videos of a big turbo setup and its amazing however mtuning3 could share alot more info, regardless of his level of understanding, he will know why they cannot go past 16 psi.

PS Xalia is running 16psi on his gt2560r without tuning

xalia's car is tunned and runs more than 16psi of boost

[coopman7]

Originally Posted by NajaNaja

xalia's car is tunned and runs more than 16psi of boost

You're a little late. When i wrote that Xalia was infact NOT tuned

If you were keeping up you would have known that by reading his thread over a month ago

Quoting something i wrote 2 months ago which was correct at the time of posting is a bit silly now isnt it

Xalia, if i remember correctly got tuned at minikinetics with the unichip on 9th May 2009, around 3 weeks after i wrote what i did...

Skipping to the last 3 posts i assume

[NajaNaja]

LoL i was browsing the thread and inverted date format did its work again!

you are right

[coopman7]

No worries

[Jesle]

Originally Posted by mtuning3

the issue we having right now its passed 16psi the car cuts power aroud 5000rpm,but no ignition pull ,afr is good in the low 11,the trottle plate just closes half way?up to 16psi the car runs verry strong al the way up until the rev limiter and xalia runing with is gt 25 witout any kind of tuning is suicidle,the stock afr is creasy lean as it is but the gt 28 is making much more volume than the gt 25

Hi I'm from Denmark

I have a Peugeot 207 GT with the same mods as mtuning3.

I have the same problem with my car. It's running to the rev limiter with 0,9 bar/about 13 PSI. Above that the trottle plate closes half way.

My tuner thinks that it's the mapcensor that is the problem, but he is not sure.

I will get back with information as soon I have found a solution for the problem.

/Jesper from Denmark

[Jesle]

Originally Posted by mtuning3

the issue we having right now its passed 16psi the car cuts power aroud 5000rpm,but no ignition pull ,afr is good in the low 11,the trottle plate just closes half way?up to 16psi the car runs verry strong al the way up until the rev limiter and xalia runing with is gt 25 witout any kind of tuning is suicidle,the stock afr is creasy lean as it is but the gt 28 is making much more volume than the gt 25

Tester

[coopman7]

Originally Posted by Jesle

Hi I'm from Denmark

I have a Peugeot 207 GT with the same mods as mtuning3.

I have the same problem with my car. It's running to the rev limiter with 0,9 bar/about 13 PSI. Above that the trottle plate closes half way.

My tuner thinks that it's the mapcensor that is the problem, but he is not sure.

I will get back with information as soon I have found a solution for the problem.

/Jesper from Denmark

The solution is a remap The stock ecu map does not like the aggresivness of how the gt28rs brings on its boost, the ecu therefore closes the throttle to limit boost. If you have some sort of scan tool you can hook it up and watch your throttle input % so even if you have your foot at WOT the actual throttle opening will be closer to 30%. Only way to overcome this is a custom remap.

Being that you are in EU you shoudnt have a problem getting your car mapped but mtuning3's is US spec so is more difficult to tune.

[Jesle]

Originally Posted by coopman7

The solution is a remap The stock ecu map does not like the aggresivness of how the gt28rs brings on its boost, the ecu therefore closes the throttle to limit boost. If you have some sort of scan tool you can hook it up and watch your throttle input % so even if you have your foot at WOT the actual throttle opening will be closer to 30%. Only way to overcome this is a custom remap.

Being that you are in EU you shoudnt have a problem getting your car mapped but mtuning3's is US spec so is more difficult to tune.

Hey Coopman 7

My car has the same problem as mtuning3. My car has been flashed 34 times, wish means that we have tried to solved the problem with 34 different maps but no luck.

I will let you know when my tuner has the time to fix the problem.

[coopman7]

Originally Posted by Jesle

Hey Coopman 7

My car has the same problem as mtuning3. My car has been flashed 34 times, wish means that we have tried to solved the problem with 34 different maps but no luck.

I will let you know when my tuner has the time to fix the problem.

Your info could help mtuning3 out i think as he hasnt found a solution for his probs yet so he will be in the same boat as you. Fortunately for us in the UK we have a few tuners who can custom remap these cars and the tuner im going with has already done a big turbo remap on an r56

Personally i wouldnt have went the big turbo route unless i was 110% that i had a custom tune available so i hope it works out for you guys Let us know how you get on!

[ThumperMCS]

Originally Posted by coopman7

Personally i wouldnt have went the big turbo route unless i was 110% that i had a custom tune available

Me too!

[Ottoman_FD3S]

Originally Posted by mtuning3

the issue we having right now its passed 16psi the car cuts power aroud 5000rpm,but no ignition pull ,afr is good in the low 11,the trottle plate just closes half way?up to 16psi the car runs verry strong al the way up until the rev limiter and xalia runing with is gt 25 witout any kind of tuning is suicidle,the stock afr is creasy lean as it is but the gt 28 is making much more volume than the gt 25

I know what you're problem is..

Sounds to me, you're maxing out your Map sensor...

I'll bet my car, the Mini's Map sensor is only a 2 bar map sensor

1 Bar atmosphere + 1 Bar of Boost

manufacturer has no reason to make it more... since they didn't expect to boost that high

most 1 Bar Map sensors Max out at ~1.1-1.15 Bar which Suprise suprise is 16.X Psi

what happens is when the Map sensor is pegged.. the Ecu is invoking Boost/Fuel cut.. which is a defense mechanism for the engine to protect itself from blowing up...

your only solution is Get a 3 Bar map sensor..and rescale the timing and fuel maps

but that sounds beyond the scope of the stock ECU tuning...

if U want more power.. u need to get a bigger Turbo that can push more CFM @ 1.1 Bar

or at least a larger Turbine on the current turbo to improve top end..


otherwise look at other areas to improve the Volumetric Effeciency of the motor such as Cams, cooling of intake charge, porting/polishing, 3 way valve job etc..

simply turning up the wick doesn't seem to be an option...




If you don't believe me... you can test it..

u need to to tap into the signal wire of Map sensor.. it will either be rising or reducing voltage

as boost goes up.. the sensor will climb towards 5V or 0 V

and 1.1 Bar is pegging ur sensor at it's maximum

if ur not comfortable splicing wires or the scan tool cannot read the sensor data

perhaps u can look up the part number online and find some tech. info on it.

[chakraj]

three way valve job I think I saw a porno once about something like that

[Ottoman_FD3S]

there's 5 way valve jobs as well

and Oversized valves :D :p

[chakraj]

Now thats just disgusting

[XaLia]

My car is running a bigger turbo @20 psi and i havent changed the map sensor..So i dont believe thats the problem..

[Ottoman_FD3S]

where are u tapping the boost source from?

ur gauge and map sensor might not be reading the same..