[katsooba]

Originally Posted by g2BMW

of course it can be, use your stock inlet pipe to get measurements.

good idea
took it apart
got some measurments
i think i will convert my E8x intake to a F2X intake

[Ozzie335i]

Originally Posted by weehe126

WGDC = Wastegate Duty Cycle. It basically means how hard the wastegate/turbo are working to make boost. When you max out a turbo you are probably at 100% WGDC. I am guessing you were around 75% WGDC with stock turbo at 15psi, 70% with stage 1 and 40% for stage 2. The more efficient the turbo, the easier it is to make boost, the lower the WGDC.

Now if you get something like the inlet pipe, it will reduce WGDC for that turbo. However, it does not mean the turbo will produce more power at the same boost, it just means it will make it easier for that turbo to hit its boost. I am interested in the inlet because it may help the stock turbo hold boost a bit better to redline. If this is true for the stock turbo (we know it is true for stage 2) I should be able to run more boost higher in the rpms, resulting in more power. But if I were not to change my boost targets, it would result in no gains since I am not running more boost. It would result in a lower WGDC,making it easier on the turbo but that is about it.

Good explanation, and I understand the reasoning, and bought it with that in mind, not knowing the technical terms involved. Not disputing you here, I just don't understand why some said that what I did was not worth it unless I went full bore. I can tell you that it was well worth it, and I am glad I did.

Isn't a bolt on that facilitates a turbo, whatever turbo, to be able to make as much power as it can not the same as the bolt on device making more power? From your explanation, and your stated intent, it seems like the Pure inlet would allow the turbo to spool earlier on since there is less input restriction, which kind of was my rationale for buying it. While people focus on more maximum power, if the power is greater at lower rpms, as the curve goes up, isn't that essentially providing more power? Just putting that out there.

For what you seek, perhaps the hot rodded diverter valve is what you really need.

Great dialog, of which I for one, am learning from it. Please keep it going.

[kevBquick]

Bump for data!

[kevBquick]

Originally Posted by weehe126

WGDC = Wastegate Duty Cycle. It basically means how hard the wastegate/turbo are working to make boost. When you max out a turbo you are probably at 100% WGDC. I am guessing you were around 75% WGDC with stock turbo at 15psi, 70% with stage 1 and 40% for stage 2. The more efficient the turbo, the easier it is to make boost, the lower the WGDC.

Now if you get something like the inlet pipe, it will reduce WGDC for that turbo. However, it does not mean the turbo will produce more power at the same boost, it just means it will make it easier for that turbo to hit its boost. I am interested in the inlet because it may help the stock turbo hold boost a bit better to redline. If this is true for the stock turbo (we know it is true for stage 2) I should be able to run more boost higher in the rpms, resulting in more power. But if I were not to change my boost targets, it would result in no gains since I am not running more boost. It would result in a lower WGDC,making it easier on the turbo but that is about it.

+1 on Whut he said. Which why I would like to see some logs. A dyno would be nice. Both. Instead of speculation.

[kevBquick]

Originally Posted by Ozzie335i

Good explanation, and I understand the reasoning, and bought it with that in mind, not knowing the technical terms involved. Not disputing you here, I just don't understand why some said that what I did was not worth it unless I went full bore. I can tell you that it was well worth it, and I am glad I did.

Isn't a bolt on that facilitates a turbo, whatever turbo, to be able to make as much power as it can not the same as the bolt on device making more power? From your explanation, and your stated intent, it seems like the Pure inlet would allow the turbo to spool earlier on since there is less input restriction, which kind of was my rationale for buying it. While people focus on more maximum power, if the power is greater at lower rpms, as the curve goes up, isn't that essentially providing more power? Just putting that out there.

For what you seek, perhaps the hot rodded diverter valve is what you really need.

Great dialog, of which I for one, am learning from it. Please keep it going.

No no.

The inlet pipe should allow, we hope, for high rpm side of the game. If it does what we think it does.

Diverted valve does not make any power. It stops you from leaking boost. Since factory has a rubber diaphragm. The aftermarket ones use a billet aluminum piston to clamp down and not allow boost to leak back to the turbo. The rubber can obviously tear.

[weehe126]

The inlet will not help with spool. The benifits of the inlet are at higher rpms when the stock inlet becomes restrictive. So at lower rpms on spool up the stock and pure inlet will be the same. Once higher in the rpms more air can flow to the turbo with the pure over stock, resulting in less work for the turbo. But the turbo can only put out a set amount of air. So this is the debate for stock turbo, can it put out more air and the inlet is stopping it from doing this. My guess is it will be minimal, 1-2psi above 5000rpms. But this might mean 20whp more up top.

If i get the time I will try and convince my buddy to lend me his inlet to do log comparisons. But i bet dyno data will be here first. As for the DV, this only comes into play if it is not holding boost. The DV can not make more boost, only hold what is there

[kimoboy]

Originally Posted by weehe126

The inlet will not help with spool. The benifits of the inlet are at higher rpms when the stock inlet becomes restrictive. So at lower rpms on spool up the stock and pure inlet will be the same. Once higher in the rpms more air can flow to the turbo with the pure over stock, resulting in less work for the turbo. But the turbo can only put out a set amount of air. So this is the debate for stock turbo, can it put out more air and the inlet is stopping it from doing this. My guess is it will be minimal, 1-2psi above 5000rpms. But this might mean 20whp more up top.

If i get the time I will try and convince my buddy to lend me his inlet to do log comparisons. But i bet dyno data will be here first. As for the DV, this only comes into play if it is not holding boost. The DV can not make more boost, only hold what is there

[Ozzie335i]

Originally Posted by weehe126

The inlet will not help with spool. The benifits of the inlet are at higher rpms when the stock inlet becomes restrictive. So at lower rpms on spool up the stock and pure inlet will be the same. Once higher in the rpms more air can flow to the turbo with the pure over stock, resulting in less work for the turbo. But the turbo can only put out a set amount of air. So this is the debate for stock turbo, can it put out more air and the inlet is stopping it from doing this. My guess is it will be minimal, 1-2psi above 5000rpms. But this might mean 20whp more up top.

- So in reality it sounds like it does not make all that much difference in power. 5 percent @ 400 hp, that sounds like it could almost be the difference in 2 dyno tests. Just get the bigger turbo, and forget the input pipe.

If i get the time I will try and convince my buddy to lend me his inlet to do log comparisons. But i bet dyno data will be here first. As for the DV, this only comes into play if it is not holding boost. The DV can not make more boost, only hold what is there

- Sorry wehee, I thought you had said that you wanted you engine to hold boost. Thank you for your patience in schooling me.

[kevBquick]

@Pure Turbos any dyno results....its been out a while. hoping you could enlighten us...more so on the stock turbo debate.

i have zero doubt there IS gains to be had on stage 1 and even more on stage 2.

real question is what happens on a stock turbo and your inlet?

[Dhillon92]

Originally Posted by kevBquick

@Pure Turbos any dyno results....its been out a while. hoping you could enlighten us...more so on the stock turbo debate.

i have zero doubt there IS gains to be had on stage 1 and even more on stage 2.

real question is what happens on a stock turbo and your inlet?

+1, I think for now only people with a upgraded turbo would be interested in this inlet. If Pure or anyone else with a stock turbo could show any gains from just the inlet, I think there would be a whole lot of people all over these!

[Newguy123]

Originally Posted by Dhillon92

+1, I think for now only people with a upgraded turbo would be interested in this inlet. If Pure or anyone else with a stock turbo could show any gains from just the inlet, I think there would be a whole lot of people all over these!

Pure can do that soon I'm sure... I swung by their shop today and saw their newest addition....dyno jet

[kevBquick]

Originally Posted by Dhillon92

+1, I think for now only people with a upgraded turbo would be interested in this inlet. If Pure or anyone else with a stock turbo could show any gains from just the inlet, I think there would be a whole lot of people all over these!

i sent them an email regarding their inlet....got the opposite response i was expecting.

so i will wait.

[Pure Turbos]

Originally Posted by Dhillon92

+1, I think for now only people with a upgraded turbo would be interested in this inlet. If Pure or anyone else with a stock turbo could show any gains from just the inlet, I think there would be a whole lot of people all over these!

We built these inlets intended to complement our Stage 2 turbo, which it does. Customers have reported a decrease in wastegate duty cycle using this inlet pipe on stock and stage 1 turbos, which may result in a power gain. There is definitely a power gain when used with our Stage 2 turbo, no question.

Originally Posted by Newguy123

Pure can do that soon I'm sure... I swung by their shop today and saw their newest addition....dyno jet

Now that the Dynojet is up and running, it's convenient to test small changes, like the inlet pipe.

Originally Posted by kevBquick

i sent them an email regarding their inlet....got the opposite response i was expecting.

so i will wait.

Thanks for the email. To answer your email question: We do not offer a refund on a used inlet pipe because you don't prefer the added turbo intake noise. Sorry and Thanks.

[dannyle27]

I'm willing to let you test it out on my stock turbo. I'd like to personally see results for stock turbo, stock turbo + inlet duct, and then I'll get my stage 1 upgrade installed as well...

[kevBquick]

Originally Posted by Pure Turbos

Thanks for the email. To answer your email question: We do not offer a refund on a used inlet pipe because you don't prefer the added turbo intake noise. Sorry and Thanks.

i guess your confusing my question of turbo noise with what i'm reffering to....

which is this.

03-08-2015, 11:01 AM
Quote:
Originally Posted by Nugs
Has anyone else here installed the Pure Intake pipe?
I got mine installed Friday and now I have a fluttering noise when letting off the throttle.

Trying to figure out if I'm only noticing now this because the metal pipe amplifies it, or if I have an issue with my DV.
Any help would be appreciated.
We had one other customer who said they experienced the same thing. I sent your post to him, so maybe he will chime in here.

I believe it was in the tuning, and they were able to solve it. Are you flash only? or JB4? The other customer was flash only.

Though, you also have a non-stock and non-PURE turbo right? And different dv?

Thanks

and another...

I installed the pure inlet on my stage 1 turbo and I did get the fluttering noise on lift. I'm working with a local protuner who has been dialing in boost control. What logs showed was a decrease in duty cycle (great!) and overshooting load/ boost big time. Once we got the overshooting under control almost all of the flutter went away. On a very hard pull, like a 3rd gear pull for a log, where you lift at redline (instead of pedal through next gear) the flutter is detectable

and your post all from n54tech

We have had 2 other customers with your same issue, but they were both running the Forge DV. We recommended they switch back to the stock DV. They did, and the problem went away.

However, if you are hearing some DV flutter when driving sedately, I don't feel like you're hurting anything. People commonly mistake "compressor surge" (which can be a true problem) with DV flutter or "surging" sounds.

my point was i wasn't willing to accept these if that was going to happen. since really there have been no posts about the inlet since then. this is the only data i have to go off. i wasn't willing to go off guesses of what it could be or might be. or me needing different tuning all of the sudden from a pipe swap.

if i got none great i'm happy. i keep the inlet. if it does the above...not something i would be interested in. "turbo sounds" or recorder/flute noises that others mentioned is not something i would return your pipe for.

but since we look at the posts...march is really the only mentions of when people put them on and decided to say something about them. thats all i have as a consumer to go by. and my car runs solid ...so i was saying if i change it out and i experience the above (non turbo noise)...that wouldn't be something we could return it for? i'm hoping i won't but if i do...then i'm hoping you guys would allow for a return.

[Dhillon92]

I agree that most if the information on this inlet is just around when it was released and reviews of the purchases that were with the stage 1/2 upgrades.

Then there were mentions by Jetmn that perhaps this inlet wouldn't be a solid fit for the stock turbo due to the unbored stock compressor side.

As of now this just seems to be a pipe you would buy if you upgraded turbo, I just think that it would be great if we can have some data on stock turbos. If this helps the powerband of the stock turbo even the slightest, I'm sure a lot more people would be all over it. (Me being one of them). I understand that it would reduce WGDC, but what about fitment on stock vs. Stage 1/2?

[Pure Turbos]

Originally Posted by Dhillon92

I agree that most if the information on this inlet is just around when it was released and reviews of the purchases that were with the stage 1/2 upgrades.

Then there were mentions by Jetmn that perhaps this inlet wouldn't be a solid fit for the stock turbo due to the unbored stock compressor side.

As of now this just seems to be a pipe you would buy if you upgraded turbo, I just think that it would be great if we can have some data on stock turbos. If this helps the powerband of the stock turbo even the slightest, I'm sure a lot more people would be all over it. (Me being one of them). I understand that it would reduce WGDC, but what about fitment on stock vs. Stage 1/2?

Inlet pipe fitment is the same between stock turbo and PURE Stg 1 & 2.

We will get around to testing the pipe with stock and stg1 turbos. For now it's most importantly recommended for the Stg2 turbo.

The inlet pipe will not create any noises, though it could make natural system noises elaborated or more audible.

[kevBquick]

Originally Posted by Pure Turbos

Inlet pipe fitment is the same between stock turbo and PURE Stg 1 & 2.

We will get around to testing the pipe with stock and stg1 turbos. For now it's most importantly recommended for the Stg2 turbo.

The inlet pipe will not create any noises, though it could make natural system noises elaborated or more audible.

thanks for the update and clarification!

[Nugget]

Originally Posted by kevBquick

i guess your confusing my question of turbo noise with what i'm reffering to....

which is this.

03-08-2015, 11:01 AM
Quote:
Originally Posted by Nugs
Has anyone else here installed the Pure Intake pipe?
I got mine installed Friday and now I have a fluttering noise when letting off the throttle.

Trying to figure out if I'm only noticing now this because the metal pipe amplifies it, or if I have an issue with my DV.
Any help would be appreciated.
We had one other customer who said they experienced the same thing. I sent your post to him, so maybe he will chime in here.

I believe it was in the tuning, and they were able to solve it. Are you flash only? or JB4? The other customer was flash only.

Though, you also have a non-stock and non-PURE turbo right? And different dv?

Thanks

and another...

I installed the pure inlet on my stage 1 turbo and I did get the fluttering noise on lift. I'm working with a local protuner who has been dialing in boost control. What logs showed was a decrease in duty cycle (great!) and overshooting load/ boost big time. Once we got the overshooting under control almost all of the flutter went away. On a very hard pull, like a 3rd gear pull for a log, where you lift at redline (instead of pedal through next gear) the flutter is detectable

and your post all from n54tech

We have had 2 other customers with your same issue, but they were both running the Forge DV. We recommended they switch back to the stock DV. They did, and the problem went away.

However, if you are hearing some DV flutter when driving sedately, I don't feel like you're hurting anything. People commonly mistake "compressor surge" (which can be a true problem) with DV flutter or "surging" sounds.

my point was i wasn't willing to accept these if that was going to happen. since really there have been no posts about the inlet since then. this is the only data i have to go off. i wasn't willing to go off guesses of what it could be or might be. or me needing different tuning all of the sudden from a pipe swap.

if i got none great i'm happy. i keep the inlet. if it does the above...not something i would be interested in. "turbo sounds" or recorder/flute noises that others mentioned is not something i would return your pipe for.

but since we look at the posts...march is really the only mentions of when people put them on and decided to say something about them. thats all i have as a consumer to go by. and my car runs solid ...so i was saying if i change it out and i experience the above (non turbo noise)...that wouldn't be something we could return it for? i'm hoping i won't but if i do...then i'm hoping you guys would allow for a return.

The metal pipe will not cause fluttering, but it will amplify the noise that you might not have heard before.
I changed from the Forge DV to stock DV with the GFB DV+ and the noise was reduced.

[kevBquick]

Originally Posted by Nugget

The metal pipe will not cause fluttering, but it will amplify the noise that you might not have heard before.
I changed from the Forge DV to stock DV with the GFB DV+ and the noise was reduced.

no worries...nugs

i'm waiting for some JB4 logs or some dyno to see if it does anything for a stock turbo.

that was the only info out there at the time. anything from n54tech and other forums so...i wanted to make sure that it wasn't going to be something we would experience, more importantly compressor surge. i wouldn't expect to experience those but i'm going just what people have posted. and then this thing dropped of the face of the earth. so data was limited or feedback. i kinda bumped this and was hoping someone had it and did some tests between march and august but i guess not.

at this point a feel if it was the next big mod....everyone would have been posting about it. similar to the n54 when dave found out that it was trapping his car. but i don't expect those results either. i'm realistic. being realistic....i'm expecting that it will help a stock turbo little to none. a stage 1 somewhat and a stage 2 a lil more. would love it if it did give me a couple more psi at the top and it meant something...i have my fingers crossed that it does. cuz 11psi at 6650rpms sucks. we could use more. like 13psi

[harkes]

Pure Turbos
Bump!

Gotta get that dyno broken in...

[Bours]

Anyone can tell if they really feel the difference with the inlet pipe and where in the powerband do you feel it ?