Re-dynoed the car today

[Oricle]

On a mustang dyno my best run was 238.5 WHP. I'm having some problems though with my boost. I'm cutting boost at 5100 RPM, from 17 PSI(20 PSI on my 238.5WHP run) to 10 PSI.
If anyone can confirm, a 4.7 Diode is made to trick the computer that it wont go any more than 17 PSI. I'm assuming I need to go to a 4.3 Diode to fix this boost issue.
(will upload a log shortly of 003, and 115)
Here is a shot of my dyno sheet on my cars worst run.






Buddies evo which was having boost cuts too pushed out 207WHP. Dyno was reading a lot lower than I thought.

[tamadrumr88]

Rotate the picture CCW 90* and rehost it so I don't cramp my neck

[mike-2ptzero]

If a 4.7 diode is not working a 4.3 isn't going to change anything. Are you sure the throttle body is closing causing your boost to decrease. Even if the throttle does close during a run your boost should not drop to 10psi from 20, you most likely have another issue.

[Oricle]

If a 4.7 diode is not working a 4.3 isn't going to change anything. Are you sure the throttle body is closing causing your boost to decrease. Even if the throttle does close during a run your boost should not drop to 10psi from 20, you most likely have another issue.

This is where it got confusing.(guess i should have went more into detail).
Up into 4880 on my logs it looks great. Requesting 1.2 bar, and 100% throttle. At 4880 it cuts my throttle and declines(56%, 48%, etc). At the same time my requested boost starts going down from 2200mbar all the way down to 1000mbar.

I'd post the log but cannot figure out how.

It seems like my tuner figured screw the last 1000 RPM's.
Now would putting in a 4.3 diode allow me to continue my 1.2 bars through out the range, and just tweak it with fuel?

[Poopie]

are you still using the stock fueling system? what injectors? air fuel logs?

[Oricle]

are you still using the stock fueling system? what injectors? air fuel logs?

Yes stock injectors.
Air fuel logs are insanely rich in the range of .6-.7.
Once I get my boost issue fixed I will start leaning out my injectors, and hopefully pick up a nicer power band.

[Poopie]

what year is your car? you said you clamped your maf so its a dbw. 2000 or 2001?

[Oricle]

what Year Is Your Car? You Said You Clamped Your Maf So Its A Dbw. 2000 Or 2001?

01

[mike-2ptzero]

Well the 4.7 diode should allow you to run anything above 18psi so thats not what is causing your throttle to close. It could be the fact that the injector duty pulse is at 100% and some how the ecu doesn't like it. Not sure why you think your going to have enough fuel with stock 270cc injectors while trying to produce more then 250whp on pump gas.

You can just capture a screen shot of your log and then load it into the AZ gallery.

[Poopie]

you've maxed out your injectors. stop trying to get more out of them. your 260whp graph back in the day was from a misfire spike.

[slopoke]

mods?

[mike-2ptzero]

He is running a GTRS on a 2001 with stock injectors. Not sure why he thinks that is going to work when stock injectors aren't enough good enough for a K04 and the tuners all use 440-550cc for that size turbo. The stock injectors just cant flow enough for the amount of air being forced into the engine. He says that he is running rich but never posts any logs to back that up.

[sean1.8t]

jesus. step away from the audi man

[slopoke]

so 20psi on a gtrs will net you around 230-250whp? So with 25psi and some GOOD tunning and the right parts you could get close to 300whp?

[sean1.8t]

^you're missing the point.

the man is on stock injectors. a gtrs just doesn't work alone. it needs supporting mods. like fmic, software, injectors, exhaust, intake. without any one of those, the setup will not run effeciently, and not make any power. which is what he is doing.

all eliminator setups that have made 300+Awhp have had ALL supporting mods plus either race gas, meth injection, or both

[slopoke]

thats what i said lol, "with good tuning and the right parts" however i had no idea anybody made over 300whp on the eliminator thanks! btw who has? and can it be done on the stock manifold?

[sean1.8t]

do some research man. many people have them posted in their sigs. just search "dyno" or "GTRS/71r dyno" in the B5 and B6 sections.

you'll see anything from 250Awhp to 350Awhp

[Don Supreme]

Still stock injectors?? The only thing keeping that motor together is the computer protecting you!

[sean1.8t]

Still stock injectors?? The only thing keeping that motor together is the computer protecting you!

exactly!

and he wants to attempt to go around that and lean out his injectors

[Poopie]

i made 315whp uncorrected.

[solowb5]

Most the guys making 300+ on a gt28 are the B6 guys. Not the B5.

[mike-2ptzero]

Most the guys making 300+ on a gt28 are the B6 guys. Not the B5.

Alexandre Croteau had a 99 running Tapp tuning on his GTrs elim.

[Oricle]

you've maxed out your injectors. stop trying to get more out of them. your 260whp graph back in the day was from a misfire spike.

My 250whp graph was from a different dyno.
I'll toss on a set of bigger injectors I have in my garage and drop down my fuel pressure and see if I'm still cutting throttle. If that works I'll tweak my car to run on these injectors. I think I'm still going to have the exact same problem.

[Oricle]

^you're missing the point.

the man is on stock injectors. a gtrs just doesn't work alone. it needs supporting mods. like fmic, software, injectors, exhaust, intake. without any one of those, the setup will not run effeciently, and not make any power. which is what he is doing.

all eliminator setups that have made 300+Awhp have had ALL supporting mods plus either race gas, meth injection, or both

Do you have any idea what you're talking about? I have a custom tune on my car.

I still stay by it being an overboost issue.

[Oricle]

Well the 4.7 diode should allow you to run anything above 18psi so thats not what is causing your throttle to close. It could be the fact that the injector duty pulse is at 100% and some how the ecu doesn't like it. Not sure why you think your going to have enough fuel with stock 270cc injectors while trying to produce more then 250whp on pump gas.

You can just capture a screen shot of your log and then load it into the AZ gallery.

Thats the exact problem. In my higher RPMS my tune never seemed to be finished and In turn it's not even requesting 18 PSI which is throwing me into limp mode.

I'll toss you some logs up, it's prob almost impossible to understand what I'm saying without logs.
One log is uploaded-not a good example since the log ends early, but it shows the idea that the requested boost is decreasing where I cut throttle.

What is the max inj on time you suggest? I have so many logs and can't seem to find my 002 blocks at the moment.

[mike-2ptzero]

Can you toss a log with block 031 up there?

[Oricle]

Can you toss a log with block 031 up there?

Do you think the actual lambda value being leaner than the requested value shows the injectors are going past their limits?

I went through lemmiwinks last night, and leaned out the engine(didn't get a chance to run vagcom), but the boost cuts, etc are still at the same RPMs

[mike-2ptzero]

Do you think the actual lambda value being leaner than the requested value shows the injectors are going past their limits?

I went through lemmiwinks last night, and leaned out the engine(didn't get a chance to run vagcom), but the boost cuts, etc are still at the same RPMs

The ecu could be dumping fuel seeing that your target AFR is 11.8:1 (.805) and then drops to .743 which is 10.9:1 and thats a pretty big jump. Your actual AFR jumps from 11.7:1 to 10.68:1 and then down to 9.9:1, this pretty much is a sign of the ecu dumping fuel because of another issue.

[Oricle]

The ecu could be dumping fuel seeing that your target AFR is 11.8:1 (.805) and then drops to .743 which is 10.9:1 and thats a pretty big jump. Your actual AFR jumps from 11.7:1 to 10.68:1 and then down to 9.9:1, this pretty much is a sign of the ecu dumping fuel because of another issue.

So you're thinking it is a issue other than injectors being maxed at this point?
I'm going to try to get ahold of a 4.3 diode and see what happens.

[mike-2ptzero]

So you're thinking it is a issue other than injectors being maxed at this point?
I'm going to try to get ahold of a 4.3 diode and see what happens.

Well the problem could be that your just trying to run the stock injectors beyond their actual spec which might be causing the ecu to freak out. Since all the safety systems in the ECU are all tied into each other it could be why your throttle is closing to almost 25% and going into limp. I am suprised you haven't just gone with just a set of 430 or 550cc injectors so that you have more head room and to keep the injector duty cycle closer to stock.

I dont think its an over boost issue since the throttle usually opens back up once boost is controlled, plus your boost readings are close to spec and you haven't said anything about getting a boost code.

[Oricle]

Well the problem could be that your just trying to run the stock injectors beyond their actual spec which might be causing the ecu to freak out. Since all the safety systems in the ECU are all tied into each other it could be why your throttle is closing to almost 25% and going into limp. I am suprised you haven't just gone with just a set of 430 or 550cc injectors so that you have more head room and to keep the injector duty cycle closer to stock.

I've been trying to prevent tweaking it to run on the 430's or 550's but I may have to. What did the Revo B5 put down with the GTRS?
You're correct-I haven't had any boost codes which I haven't thought of or went even into a limp mode.

I have a set of 315cc's laying around that I'm going to toss in and see if that does anything.

[mike-2ptzero]

I've been trying to prevent tweaking it to run on the 430's or 550's but I may have to. What did the Revo B5 put down with the GTRS?
You're correct-I haven't had any boost codes which I haven't thought of or went even into a limp mode.

I have a set of 315cc's laying around that I'm going to toss in and see if that does anything.

We haven't put that 2001 on the dyno yet, customer is just waiting to get a clutch but it seems the stock one has been holding up fine so far. Its just been so hot here in socal lately that his car is most likely not making as much power as he would like.

[Oricle]

Do you think I would be better off to go with the Revo tune(is it being sold yet)?
The Revo tune requires 550cc injectors, correct?

[sean1.8t]

Do you have any idea what you're talking about? I have a custom tune on my car.

I still stay by it being an overboost issue.

hmm...

so hows that custom tune?

[Oricle]

hmm...

so hows that custom tune?

It's doing fine.
The thing is what supporting mods a different tune was used for doesn't make mine require them.

While I do have a FMIC, 3" inlet, etc, my car wasn't tuned with a FMIC or an inlet.

I'm sure you know this, but the way you were coming off was every BT had to have a FMIC, etc in order for a tune to be good.

[Poopie]

well yes a no. You can run a BT with the stock FMIC but it won't be efficient. And you can run a less agressive tune to compensate for it to be a "safe" tune.

No because a FMIC does a much better job cooling the the intake temps. Look up the ideal gas law on wiki and you will see that increasing pressure = increased temp.

[sean1.8t]

It's doing fine.
The thing is what supporting mods a different tune was used for doesn't make mine require them.

While I do have a FMIC, 3" inlet, etc, my car wasn't tuned with a FMIC or an inlet.

I'm sure you know this, but the way you were coming off was every BT had to have a FMIC, etc in order for a tune to be good.

well no, of coarse you don't need a fmic or higher flowing injectors. not if you're only shooting for, oh i dunno, 238.5Awhp

you can run a gtrs on stock pretty much everything if you want. zero timing, and no more than 5psi. you might make as much power as a k03 car with more lag.

but you'll never be able to run ~25psi w/race gas on an aggressive tune and expect the motor to stay together.

it's all give and take. these motors take a lot to give a lot of power

[Oricle]

well no, of coarse you don't need a fmic or higher flowing injectors. not if you're only shooting for, oh i dunno, 238.5Awhp
you can run a gtrs on stock pretty much everything if you want. zero timing, and no more than 5psi. you might make as much power as a k03 car with more lag.
but you'll never be able to run ~25psi w/race gas on an aggressive tune and expect the motor to stay together.
it's all give and take. these motors take a lot to give a lot of power

At this point I have stock internals and don't want to push it as it is, which I know I am currently doing with stock injectors. I do need to order a set of 550cc injectors which I'll prob do tonight. My horsepower I'm happy with due to the fact it's peaking at 4800 RPM. Compared to a APR Stage III which does 280 CHP. This was on a very rough dyno. To compare I pushed 242 WHP at a different dyno(Torque Freaks), without a FMIC, k03 adapater, and a 3" inlet.

[AudiRacerS4]

At this point I have stock internals and don't want to push it as it is, which I know I am currently doing with stock injectors. I do need to order a set of 550cc injectors which I'll prob do tonight. My horsepower I'm happy with due to the fact it's peaking at 4800 RPM. Compared to a APR Stage III which does 280 CHP. This was on a very rough dyno. To compare I pushed 242 WHP at a different dyno(Torque Freaks), without a FMIC, k03 adapater, and a 3" inlet.

you dont need upgraded internals to run a gtrs at 25psi...

[sean1.8t]

you dont need upgraded internals to run a gtrs at 25psi...

yes, and no. as long as the tune is spot on for said car and enviorment. you can run the piss out of the GTRS.

his car, on stock injectors, and a "custom" tune, i wouldn't go past 10psi