Fuel Cutout while spooling - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

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View Poll Results: Biggest douche in the universe?
04gt2860RS 28 63.64%
John Edwards 6 13.64%
Standalone ECU users 1 2.27%
Constant boosting truboz 3 6.82%
550s on stock ECU users 6 13.64%
Voters: 44. You may not vote on this poll

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Old 07-28-2008, 11:12 AM   #21
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you said what I was thinking

maybe we should add a poll
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Old 07-28-2008, 11:29 AM   #22
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...thats a hard one, Im not sure.
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Old 07-28-2008, 11:34 AM   #23
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Quote:
Originally Posted by 04gt2860RS View Post
Holy **** guys, Im sorry I know how to make a car perform...
Quote:
Originally Posted by 04gt2860RS View Post
...im looking for help here...
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Old 07-28-2008, 11:39 AM   #24
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He's not coming back.
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Old 07-28-2008, 04:15 PM   #25
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'I suggest starting the apologies now or find a new forum to get **** on by. You've already admitted you know **** 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 **** on someone else, I know my time is worth more than to screw with idiots. No matter how much they 'know'
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Old 07-28-2008, 04:18 PM   #26
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so where's the dyno plot, with AFR log?
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Old 07-28-2008, 04:18 PM   #27
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I could care less about what you ****-heads think of me. Its the principle of helping someone. I didnt ask for stupid *** 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.
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Old 07-28-2008, 04:19 PM   #28
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Quote:
Originally Posted by 04gt2860RS View Post
I am a mechanical engineer, I know exactly how a turbo works and how to make it work the way I want it.

so you agree, a turbo is always producing boost?


Last edited by Ben; 07-28-2008 at 05:27 PM.
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Old 07-28-2008, 04:20 PM   #29
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so where's the dyno plot, with AFR log?
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
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Old 07-28-2008, 04:22 PM   #30
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Quote:
Originally Posted by 04gt2860RS View Post
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.


Last edited by Ben; 07-28-2008 at 05:24 PM.
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Old 07-28-2008, 04:22 PM   #31
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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


Last edited by Ben; 07-28-2008 at 05:09 PM.
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Old 07-28-2008, 04:23 PM   #32
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Old 07-28-2008, 04:26 PM   #33
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Ok.

Quote:
Originally Posted by 04gt2860RS View Post
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
Compared to the original MSM IHI turbo, the 2860rs will feel more luggy.

Quote:
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.
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.

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


Last edited by Ben; 07-28-2008 at 05:08 PM.
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Old 07-28-2008, 04:27 PM   #34
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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
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Old 07-28-2008, 04:30 PM   #35
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Old 07-28-2008, 04:31 PM   #36
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Quote:
Originally Posted by Braineack View Post
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.

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.
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Old 07-28-2008, 04:33 PM   #37
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Quote:
Originally Posted by 04gt2860RS View Post

'I suggest starting the apologies now or find a new forum to get **** on by. You've already admitted you know **** 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 **** on someone else, I know my time is worth more than to screw with idiots. No matter how much they 'know'
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.


Last edited by Ben; 07-28-2008 at 05:20 PM.
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Old 07-28-2008, 04:34 PM   #38
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Old 07-28-2008, 04:34 PM   #39
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Quote:
Originally Posted by 04gt2860RS View Post
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.
Quote:
ive tired it all the way from about 11psi to 22.
Quote:
I trial ran the car at 22psi
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.


Last edited by Ben; 07-28-2008 at 05:18 PM.
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Old 07-28-2008, 04:34 PM   #40
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Quote:
Originally Posted by 04gt2860RS View Post
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.
So you don't have an AFPR, piggy, or standalone. What exactly did "tuning" consist of?
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