Fuel Cutout while spooling
 

I have just finished my project of adding a GT2860RS Turbo and a custom 3in exhaust on the car. I have added a BOV right before the manifold. I started the car and it runs fine, but on a road test the car seems to lug a little and at about 5250rpm it falls on its face and cuts out. I dont know if this is a tuning problem, vacuum issue or what. Any help in this matter would be great. The car dyno'd at 248.7hp and 220 ft/lbs even though it huccups at 5250rpms. I cannot get the car to pull through the rpms correctly. Please advise. Thanks!

gonna need a little more info than that, like what are you doing for engine/fuel management at least.

horrid first post... you need to make an intro post in the "I'm a mother fucking newbie" forum. Add your location to your profile, add car specs to you sig. Then we might be more helpful :)

So far I'm running off the stock ECU, no piggy back yet. I am in the process of adding 550cc injectors and a fuel pressure regulator to cut the injectors back some. I dont know if the car is leaning out too much while building boost from low rpm's or what. I know im going to need some type of fuel managment, but I dont know what is the best for the money. Im new to this game. The car will run fine through 1st 2nd and 3rd, but it will cut out in 4-6th. It doesnt really matter what boost levels im running, ive tired it all the way from about 11psi to 22. Still cuts out. I also cannot get my BOV to work, my stock diffuser valve is too weak and leaks at idle, but the BOV doesnt function and I have some bad compressor surge.
Any help would be awesome.
A few minor tweaks and this car will have 300+ whp easy.
With that hiccup at 5250 it still had 248.7 whp at 8psi

wait, you've tried 22 psi on the stock ecu and small injectors?

... 22psi on the stock ECU? Looks like this noob is going to ban himself from life. Also if it only leaks at idle then whats the problem? Why are you trying to make boost at idle?

http://smiliesftw.com/x/huge_bs_flag.gif

you made 250 whp on the stock injectors and ecu with no timing or fuel management...

that's pure bullshit.

You FAIL.

Get over it
 

:jerkit:
Holy shit guys, Im sorry I know how to make a car perform without spending thousands on fuel managment. Yes, I have documentation of the car running 250whp without fuel managment or bigger injectors. Give me a break here, Im no idiot, and dont be jealous to say its BS. Get over yourselves, im looking for help here. I trial ran the car at 22psi, Im driving it at 8, read and understand before you jump in, how about that? Go ahead and think what you want, Im the one driving the car.

Thanks for the help, wait, no one offered any. Ha.
I build cars, I moved from 302's to a miata. I was thinking over 500 hp in a heavy car wouldnt be as fun as a light car wth a little over half that. Obviously big numbers scare you.
I'll just stick with my previous intuition and get bigger injectors and a fuel pressure regulator.
See you Ladies on the road. Actually, I hope not for your sake

Oh, so you think you know how a car runs?
Last time I check a turbo is always making boost, and at idle the BOV or Diverter valve is either releasing to the atmosphere or recirculation. And if it leaks at idle the car will stall out, or run like crap.

Maybe you should know what you are talking about before you jump on the bandwagon of these other criticizers

Experience on a website and forum
:ne:
Real world building and testing experience guys.

Im new to building tuning a turbo car, thought this website was all about helping each other but I guess its all about who thinks they are cooler. Welcome back to highschool for some of you. Maybe you were the kid I used to make fun of, or the ones that were jealous of me because I know what I am talking about and know how to perform.

Wrong, we are the ones with experience... laughing at you on the other side of our computer screens. And most likely the ones that would laugh at you in person when you start talking about running your car like you say you do.

:giggle:

Go ahead and believe yourself there champ, Im sure your car is the best there is...

If there is anyone that can offer help, I would appriciate it. Doubters dont bother posting

oh smart guy you have a MSM, that changes things a bit. You have an ECU designed for boost....It also has a thing called a boost cut, where you can only run X amount of psi. IIRC, it's 13psi....

fail.

Is your car a 04-05 MSM?

<edit> by the time I was able to hit submit, the answer was already given

In that case, there still is not 250 whp worth of fuel in those injectors. What was your correction factor?

04-05: so the pic suggests. and now his sig states it too. < edit, by the time i finished posting this ben edited his reply >

oh and 250 is not a big number, especially in a bloated MSM.

anyway, you can't just throw 550s in, your ecu won't be able to idle them. So you better come up with a better plan. So far people have failed on the MSM with the E-manage blue and ultimate. I've only heard of one person who has done a Megasquirt in an MSM, and yes it was successful.

Hope you have $2k to drop on a hydra or you are gonna need a lot more to replace the engine too.

I suggest starting the apologies now or find a new forum to get shit on by. You've already admitted you know shit about turboing a car, well there is no better forum to learn.

you fail, go away.

http://i70.photobucket.com/albums/i1...83deathtg0.gif

I vote for Giant Douche... EDIT: that poll is gonna be close.

:bowrofl::bowrofl:
you said what I was thinking

maybe we should add a poll

...thats a hard one, Im not sure.

:rolleyes:

He's not coming back.

:fawk:
'I suggest starting the apologies now or find a new forum to get shit on by. You've already admitted you know shit about turboing a car, well there is no better forum to learn.'

I have nothing to appologize for. Jerks that 'know' what they are talking about but offer no advise and just try, key word there, try to make fun of people have no business even opening their mouths.

I asked for help and got nothing. I know about boost cutout. I asked for help not dumbass comments.

I found a better forum where people know that i know some but not all and actually offer help? ha, who knew that something could live up to its standards.

Call me what you want, but next time someone asks for help, I would think twice before being a complete jackass.

That goes for all of you, and I dont care who you think you are.

Nobody is better than anybody. There is one person that can judge us, and that isnt me or any of you.

So go shit on someone else, I know my time is worth more than to screw with idiots. No matter how much they 'know'

so where's the dyno plot, with AFR log?

I could care less about what you shit-heads think of me. Its the principle of helping someone. I didnt ask for stupid ass comments. I am a mechanical engineer, I know exactly how a turbo works and how to make it work the way I want it. I am not an electrical engineer, there are things out of my knowledge on a car. My bad I dont know it all like all of you seem to.

so you agree, a turbo is always producing boost?

http://www.imgtree.net/files/2fnromyjwxg393jm6h19.jpg

Back in the dyno computer with all of my other logs.
I can only play on the weekends, my real job takes up all my time during the week

so does mine, doesn't mean i don't have a printout of all my dyno pulls handy, all the .jpgs of each online, and all the WINPEP7 files (.drf) of each right here in C:\dynoruns\ of my work computer.


no pics, it didn't happen.

http://www.pointwhite.nl/carebear.jpg

his sig says Proven 248WHP, but I read through and did not see a plot. Did I miss it?

Also, 04gt guy, there are some very knowledgable people here who have been working on miatas for a long time. They know what a miata can and cant do. The stock ECU for the MSM does have a boost cut, but I bet you already knew that.

Get a megasquirt ECU or hydra and you will be good to go for 250 WHP

http://failblog.files.wordpress.com/...llmartfail.jpg

Ok.

Compared to the original MSM IHI turbo, the 2860rs will feel more luggy.

Do you have a wide band oxygen sensor? If so, what are your AFRs during this cut out? If you don't have a wide band, I suggest investing in one. They are fairly inexpensive nowadays and are great tuning tool. They help a lot with issues like you are having.

I don't know how it could be a vacuum issue; does it only cut out when you are at WOT or during all driving conditions? Either way, it would still be considered a "tuning issue".

The people on the mazdaspeed forum may have a better idea about what the hickup is. I assume they will say it's the factory fuel cut at ~13psi or some lean condition that can be fixed with some FM gizmo.

If you are lean, then there's a bunch of options.

That's a nice number, good luck fixing it. Give as much accurate info as possible and we will help.

http://img151.imageshack.us/img151/6659/failhy3.jpg

I know, I need a fuel managment system of some kind. My whole goal here was to get a little advise on which to get. I didnt know if a MS was best, or a hydra or XEDE.
I am looking for the best out there. I know about boost cut, it happens at about 11.0 psi n 5th gear, 10.5 in 6th. 11.5 in 4th and so on. I can set it at 8psi and get good results and screw with the throttle pos. switch and get the car to run rich and it will run fine. Yes I can get 248whp, the dyno is logged and saved. I can get it when I have time. there is a massive dip in the curve where I hit boost cutout at 5200. I was running 10 psi on the dyno when I logged it. It leaned out to 16 at 6000+ rpm.
Thanks for a reply that offers some sort of knowledge and no saracms or bs

Ha, sorry I have better things to do with my time that prove myself. I just started tuning it friday. I had a few better things on a friday and saturday night.

Since tim was helpful on the technical side, I will explain the logic of everyone on this thread, and hopefully offer you some help in social graces.

1> You were offered an "in". Aside from the usual newb basing remarks about an intro thread, members asked for your setup and were willing to help.

2> You then proceeded to make a flagrant series of retarded remarks which contradicted themselves. For example.. calling yourself a builder, then stating that turbos always make boost.

3> When dealing with a forum built on testosterone (I think there is one female on this forum), you might need to learn to have a bit thicker skin. This may be a useful suggestion when dealing with "real life" situations too, as not everyone wants to hold your hand all the time.

http://failblog.files.wordpress.com/...rwinawards.jpg

you dont want bs? but i dont understand...you're full of it. It's obvious from your post the stock boost cut is 12psi. yet, you ran the car at 22psi.

http://failblog.files.wordpress.com/.../jail-fail.jpg

So you don't have an AFPR, piggy, or standalone. What exactly did "tuning" consist of?

like 33psi of unadulterated boost...on the factory boost cut no less! magic! can we hang out? go steady? friends with benefits? fuck buddies?
http://www.forumammo.com/cpg/albums/...roofFAIL-1.jpg

Your saying you were at 16 AFR at 6k under boost?!?!?!

http://icanhascheezburger.files.word...retry-fail.jpg

In my opinion the best tuning solution for the MSM is the megasquirt. It is very powerful, inexpensive, and can be wired in parallel in the MSM to retain full OBD2 for inspection reasons while allowing full control over fuel, spark, etc. However I believe there is only one MSM with it so far. It was just completed a few weeks ago. It proved it's possible (whereas most other "piggybacks" don't work well with the MSM ECU), and for the price it cannot be beat.

Now the Hydra from Flyin Miata is a much more powerful ECU, but also is MUCH more expenisve and removed OBD2 so if you are worried about passing inspection in your state, you're fucked and have to remove it every few years when inspection comes. If you are willing to spend the coin on the best out there then that's it at the moment.

Moving the TPS (or some other throttle switch) to make the car more rich is news to me. The car may think the throttle is more open that it really is, giving more fuel? I thought fueling was based solely on the MAF sensor.

http://www.my360.com.au/img/gallery/full/ZGHZHB6P.jpg

And it's cool you are a Mech Eng. there's a bunch of us here along with some very talented electrical guys. But that doesn't make you smart. I'm a ME and i'm a fucking moron.

Holy shit. haha.

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Fuel management is a MUST! I have a hydra, I like it, but megasquirt in parallel might be the best solution for you. You are likely to lose a motor the way you are going and no one wants that . The stock ECU will not idle 550's

Where is my popcorn?

Let me see if I understand this thread..

n00b - I have a car running a turbo and the stock ECU
everyone - what sort of car/specifics?
n00b - you're all jealous. I run circles around people like you and ruin your lives.
everyone - ok, cool guy..
n00b - I know how a turbo works. Turbos produce boost constantly and are able to boost higher than my boost cutoff somehow. I'm smarter than everyone because I have a job.

i don't remember the last time i laughed this hard in a thread. it would HAVE to be the direct exhaust injection thread, i think...

This thread delivers on the funny. Its gotta be a Hustler dupe, no one is this idiotic.

Heres a pro top 04gt, respect goes a long way on this forum especially when 90% of the people know WAY more then you do.

+1
http://g-images.amazon.com/images/G/...ntModeLogo.jpg

Is there a single non------- MSM owner out there?

(this guy, Repo4Sale, etc)

This is fucking priceless!!!





Hey!!! Does anyone else think the OP of this might be that same douche toilet real estate ------ that was banned a few months ago with the MSM?? You know... The douche who always had to advertise his beach house and illustrious god of all miatas?

FAGATRON!

If it hasnt been said (Im not reading this entire retard-fest) you are hitting the stock fuel cut because the MSM's ECU doesnt like you, your injectors, or your turbo. You fail.

sigh... I wish the turbo phan boi crowd would just die and leave the real men alone with their miatas, turbos, and each other. :ky:

seriously, why is this guy not banned yet? I think 90% of our members are engineers of some type. Most mechanical, but a few in other fields. 70% of us have been boosted for at least a year. Probably 25% of us have built and tuned our own turbo systems. Mostly likely 0.001% of us like this asshole.

Guess what fucko... I have a full time job too, but I still had time to write this fantastic ass ripping reply. You fucking douche nozzle.

this has to be one of the best posts ever on this site. i aplaud you douchenoob, good job.

I voted for John Edwards. That guy is scary.:giggle:


http://sp1.yt-thm-a04.yimg.com/image/25/m8/4143257634

Chris

Suddenly I'm down on power, I'm not sure what happened. The stock injectors are good for 300hp, right?

http://www.billzilla.org/meltedpiston.jpg

I just wanted everyone to have the chance to read that twice.


So, um, DO tell us, 04GT, the answer to some of these little questions. At least the boost cut thing. Unless you used your shop-vac on the dyno to hit 22 psi over the factory cut out... you've got some 'splainin to do.

Your numbers make zero sense.