@@nesmio7378 well my compressor wheel had a good bit of material around it so rather than boring that whole part out like its typically done. I grabbed a hole saw and cut into the compressor housing around the wheel until i reached the start of the blades
I believe what's happening is you're making an air siren. We'd expect that turbo to be spinning 10-25,000 rpm just out of boost. If you have a 6 blades (3 pair) moving past 4 blocks (2 pair), it will 'chop' 12 times per rev. 10k rpm = 166.7 rev/sec, 25k rpm = 416.7 rev/sec. This is how many pulses happen per second: 10k rpm = 166.7 * 12 = 2000 Hz 25k rpm = 416.7 * 12 = 5000 Hz Now search for the video "20Hz to 20kHz (Human Audio Spectrum)" and play it from 2000 to 5000 Hz at 1.5x speed - sounds just like the car in this vid! The minor differences are likely resonances from the motor & the fact the turbo isn't making a sine wave sound. It sounds more like a square wave, since the blade & post edges are not parallel. If you do the math for 6 blades and 3 anti-surge posts, the frequency is cut in half. I suspect smaller/faster turbos would sound better with 3 anti-surge posts.
I machine parts and have been trying to figure this out scientifically and you literally hit the nail on the head, thank you! My 58mm turbo will be a air siren soon! Would angling the stationary block sides create different sounds, or create unnecessary turbulence.
@@aleksisalenius5103 I haven't decided wha5 groove width to go with either.. Turbolabs suggested anything wider than .200 would cause negative effects on power, but less than .100 would be too small to hear anything.
Just installed this turbo with t51r mod(he351ve). I can confirm its very loud. I ended up putting my stock intake back on because with aftermarket aluminum tubing it was ridiculously loud. Sounds and preforms awesome though!
My HE34 with a K&N intake is already loud so, I'm wondering if there's much difference between the 34/35? Debating on doing this mod but, not sure if I want it that much louder lol
If you look at any real T51R, the trumpet in the inside is really then not so thick how companies be making them. The closes company i seen to get the real thing is Turbomod. Most companies, that do this mod fails to get the sound to carry, all the way up through the rev rang like the real thing most just get it low to mid rang. That gap, you was talking about is supposed to be way smaller not bigger like that dude said. Oh and i can't forget this 6 and 8 blade wheels, carries the sound way better 11 blades wheels. Good video tho keep it up glad you making videos about this. =)
It’s crazy that imo you still did not 100% explain how it makes a loud noise. I had to literally study and look at every cm, from what I can tell when you somehow drop in the cup housing, it has a small rectangular opening, so the air coming in creates a whistle because of the air coming in thru the rectangular shape opening, not once did you point this out, this information would be pleasing to someone who is new and has no idea about the terms you’re speaking about.
And Johnny spoke clearly to us. Exceptional video turbo!!! The things we have to learn to do and understand to actually go fast. And first learn how to drive them stock before you drive them fast.
Have you noticed what changes the pitch of the whistle? Some modded ones do not sound very close to the T51R but a lot of lower toned whistle which isnt as nice. Is it the groove width or placement?
You should have some turbos dynoed on the same engine. Identical brand and spec turbos but done with your t51r with the different clearances you’re talking about. So you can see when the clearances start to hurt or maybe help performance. Maybe send a couple to Richard Holdener, he lives for the dyno LOL.
Do you not think HKS has done all that testing already therefore HKS spec is probably the best. Products made for market got through rigorous testing!!
@@MrIrish1 This is Turbo Lab not HKS. He was talking about his T51r mods, again not HKS. He said “he’s not sure” and at other times he’s making educated guesses based on his experiences. Which is fine, it seems like he does great work. All I was saying is if he dynoed identical turbos but with different T51r specs he’d know what is too much and too little. It’s obvious in this video it hasn’t been done. Also don’t assume all products on market are thoroughly tested, especially in the aftermarket automotive industry. Their are way too many shit parts out there even from some well respected manufacturers.
Hi Austin, which turbo was that EVO X in the beginning of the video running? Is it possible to do this T51R mod to a already Anti-surge turbo? For example a Gen 2 GTX3076R?
I would like to do this to my 84 300sd mercedes turbo diesel my question is can any turbo get this mod? All I know that it has a garret turbo of that Era .
Hmmm. Anti-surge housings reduce your dose/flutter, though... So I'm wondering, how do you get loud whistle on a non-anti surge housing? And also, how do you effectively block off the anti-surge on anti-surge housings without fucking up flow or otherwise reducing performance?
I have an Australian ford falcon xr6 turbo, I love my turbo "flutter" I'm running no blow off valve, if I was to do this t51r mod would I lose the flutter?
Hey! I know this seems a far fetched but could you somehow do a custom housing (t51r mod) for a VF43 Turbo for an STI? Maybe increasing the port to a 3in could allow for the mod?
You would think that during some parts of the compressor map air would infact be flowing into the compressor via that groove I would think at hi flows not so high pressures
Looks like originally HKS accidently made a small air raid siren when they designed the anti surge port. It defiantly will make it less efficient, which is why no other companies do it. But, it will make it loud obviously. look up air raid sirens and how they are made. That's what is making the noise IMO. Isn't there a more efficient and cheaper way to make the turbo "whine" more pronounced. Fumy shaped compressor nut, angled hole in the hub etc? Seems like a lot of effort for noise.
Would you be interested on trying to do this to a 3" housing? I have a Greddy td05 18G with a billet wheel that'd I'd like to use, unless there's not enough material which I could understand. Would it be possible to convert it to a 20G that had a larger compressor cover and do it to it instead?
Have you ever done a velocity stack in a GT3782VA? I have probably 7 of them sitting around from various 6.0s. I'm wondering how silly a T51r modded GT3782VA with a 10 blade turbine wheel would sound.
@@turbolabamerica What is your email? I might be interested in doing a little work with you just to mess around with a GT3782 to maybe sell to people that are whistle junkies on 6.0s. I deal with quite a few on a daily basis.
it’s slicing the air in half that’s why it’s so loud honestly my garrett screams why? because i’m spinning it into orbit. the spacing doesn’t matter i machine anti surge all my housing and everyone screams... even my little 1749 screams on my generator set.... figured out how to do the ihi and 3 k 2 piece housings ✌🏻
I have a 2860 pulsar turbo on my miata with t51r mod from pulsar. Its ridiculously loud. I had no idea what this mod was 6 months ago. I was hesitant going with a pulsar turbo, even more so paying for the t51r mod. I am not disappointed at all. Sounds like a have a supercharger especially at lower boost pressure. My old turbo was basically silent compared to this one.
I have a question, and please forgive my agnorence. I'm planning to do a T51r mod in the future, and not sure if it's viable to install an air filter on the turbo? Is it going to fit? any changes to the sound? Thank you!!
It’s best to use a filter. I live in a construction zone, there is a lot of dirt in the air and rocks. The sound is still loud with the air filter, I have several video clips. I would not risk not using a filter.
I think I know the guy you are talking about that had no noise, my buddy Devin. He took measurements off of my Boost Labs t51r that makes LOTS of noise. Things sounds like a supercharger lol.
@@jamesgasper8630 You'll never get them back...they've had mine for 2 years now. They don't respond to email or they're phone. GL. Great vids horrible customer service.
more air too escape? no! more air in! boost is pulling in air from both sides. The groove width in the new Precision (nextGen) is larger, they state “more air through the larger AntiSurge” (further down-not up) air does not escap when in vacuume “the opposite happens” look at precision next gen schimetic
Have you actually Googled what MWI really means ? Translated Map With Inharsment, have a read and comp wheel design plays a big parts on induction noise
@@turbolabamerica I have a HE351VE that's off of my '14 Ram Cummins and has been sitting in storage collecting dust for a few years. If you want it, lmk.
I sent my 3176 with this guyto get rebuilt and came back with the same worst play and box came half open look like it got ran over by a truck! won't reply back to me or even try to come with a solution on how to redo a turbo I payed for that never got fixed!! in short don't do business!!
How does this guy have his own company? Of course the clearance has to do with the turbo whistle. That’s basically how a dam whistle works. As for his horrible explanation the fucking word your looking for is BACK Pressure!!!
t51r mod= turbo + air raid siren technology put into compressor housing
Thank you for this comment. I did a little research on how air raid sirens work and was able to do my own compressor mod which is surprisingly loud
@@Wigwhom86 How'd you do it?
@@nesmio7378 well my compressor wheel had a good bit of material around it so rather than boring that whole part out like its typically done. I grabbed a hole saw and cut into the compressor housing around the wheel until i reached the start of the blades
Do you have a video explaining what you did?
So in your opinion does the T51R Mod LOSE POWER??! 😳
I believe what's happening is you're making an air siren. We'd expect that turbo to be spinning 10-25,000 rpm just out of boost. If you have a 6 blades (3 pair) moving past 4 blocks (2 pair), it will 'chop' 12 times per rev. 10k rpm = 166.7 rev/sec, 25k rpm = 416.7 rev/sec. This is how many pulses happen per second:
10k rpm = 166.7 * 12 = 2000 Hz
25k rpm = 416.7 * 12 = 5000 Hz
Now search for the video "20Hz to 20kHz (Human Audio Spectrum)" and play it from 2000 to 5000 Hz at 1.5x speed - sounds just like the car in this vid! The minor differences are likely resonances from the motor & the fact the turbo isn't making a sine wave sound. It sounds more like a square wave, since the blade & post edges are not parallel.
If you do the math for 6 blades and 3 anti-surge posts, the frequency is cut in half. I suspect smaller/faster turbos would sound better with 3 anti-surge posts.
I machine parts and have been trying to figure this out scientifically and you literally hit the nail on the head, thank you! My 58mm turbo will be a air siren soon! Would angling the stationary block sides create different sounds, or create unnecessary turbulence.
@@stag7123 Have you already done this? I am planning doing this on a 54mm turbo and cant decide groove width etc.
@@aleksisalenius5103 I haven't decided wha5 groove width to go with either.. Turbolabs suggested anything wider than .200 would cause negative effects on power, but less than .100 would be too small to hear anything.
The brain.
Thank you lol
I suspect you really know what your on about lol..i have no clue haha
This guy knows his %REAL SHIT 110% "PROFESSIONAL "
Just installed this turbo with t51r mod(he351ve). I can confirm its very loud. I ended up putting my stock intake back on because with aftermarket aluminum tubing it was ridiculously loud. Sounds and preforms awesome though!
My HE34 with a K&N intake is already loud so, I'm wondering if there's much difference between the 34/35? Debating on doing this mod but, not sure if I want it that much louder lol
Love mine! Breaks necks when my first gen drives by people
If you look at any real T51R, the trumpet in the inside is really then not so thick how companies be making them. The closes company i seen to get the real thing is Turbomod. Most companies, that do this mod fails to get the sound to carry, all the way up through the rev rang like the real thing most just get it low to mid rang. That gap, you was talking about is supposed to be way smaller not bigger like that dude said. Oh and i can't forget this 6 and 8 blade wheels, carries the sound way better 11 blades wheels. Good video tho keep it up glad you making videos about this. =)
Cool video
How do u find compressor housings flow different went their is bends forged in there pressure outlets
Luv the content thankyou
It’s crazy that imo you still did not 100% explain how it makes a loud noise. I had to literally study and look at every cm, from what I can tell when you somehow drop in the cup housing, it has a small rectangular opening, so the air coming in creates a whistle because of the air coming in thru the rectangular shape opening, not once did you point this out, this information would be pleasing to someone who is new and has no idea about the terms you’re speaking about.
It's loud because of the way the blades design, on top of the size of the turbo as more air = faster spinning = louder sounds
And Johnny spoke clearly to us. Exceptional video turbo!!! The things we have to learn to do and understand to actually go fast. And first learn how to drive them stock before you drive them fast.
Have you noticed what changes the pitch of the whistle? Some modded ones do not sound very close to the T51R but a lot of lower toned whistle which isnt as nice. Is it the groove width or placement?
Interested in info on a modding a VSR 66/73. S366 clone. How can I get pricing etc
I have a MAPerformance turbo kit that includes a Precision 5862 turbo. How much would you charge to do the t51r mod on it?
Meanwhile, my BV39 whistles like a jet
You should have some turbos dynoed on the same engine. Identical brand and spec turbos but done with your t51r with the different clearances you’re talking about. So you can see when the clearances start to hurt or maybe help performance. Maybe send a couple to Richard Holdener, he lives for the dyno LOL.
Do you not think HKS has done all that testing already therefore HKS spec is probably the best. Products made for market got through rigorous testing!!
@@MrIrish1 This is Turbo Lab not HKS. He was talking about his T51r mods, again not HKS. He said “he’s not sure” and at other times he’s making educated guesses based on his experiences. Which is fine, it seems like he does great work. All I was saying is if he dynoed identical turbos but with different T51r specs he’d know what is too much and too little. It’s obvious in this video it hasn’t been done. Also don’t assume all products on market are thoroughly tested, especially in the aftermarket automotive industry. Their are way too many shit parts out there even from some well respected manufacturers.
Hi Austin, which turbo was that EVO X in the beginning of the video running? Is it possible to do this T51R mod to a already Anti-surge turbo? For example a Gen 2 GTX3076R?
I think that's devin niemela's car, he's running a pte6262
What makes it whistle ? Is it the spacing between the mod and the compressor housing or where the anti surge gap is at? THanks
Can you do the mod with just the housing or do you need the hole turbo ?
I would like to do this to my 84 300sd mercedes turbo diesel my question is can any turbo get this mod? All I know that it has a garret turbo of that Era .
Precision 6266 T4 Billet Turbo ball bearing will work?g35 de
Hmmm. Anti-surge housings reduce your dose/flutter, though... So I'm wondering, how do you get loud whistle on a non-anti surge housing? And also, how do you effectively block off the anti-surge on anti-surge housings without fucking up flow or otherwise reducing performance?
I have an Australian ford falcon xr6 turbo, I love my turbo "flutter" I'm running no blow off valve, if I was to do this t51r mod would I lose the flutter?
Always the right information 🫡 !!!!
Hey! I know this seems a far fetched but could you somehow do a custom housing (t51r mod) for a VF43 Turbo for an STI? Maybe increasing the port to a 3in could allow for the mod?
You can technically do it on any turbo you want
You would think that during some parts of the compressor map air would infact be flowing into the compressor via that groove I would think at hi flows not so high pressures
The air does flow in through the groove
Looks like originally HKS accidently made a small air raid siren when they designed the anti surge port. It defiantly will make it less efficient, which is why no other companies do it. But, it will make it loud obviously. look up air raid sirens and how they are made. That's what is making the noise IMO. Isn't there a more efficient and cheaper way to make the turbo "whine" more pronounced. Fumy shaped compressor nut, angled hole in the hub etc? Seems like a lot of effort for noise.
Can you do that mod on mini twin turbos?
Are you still making the T51R mod? Im interested.
Hey Austin,
Would you ever make a custom turbine housing?
I need details of what you want
@@turbolabamerica can you do 20g t51r mod down fire 3 inch inlet
Sounds like a damn jet engine 😂
Would you be interested on trying to do this to a 3" housing? I have a Greddy td05 18G with a billet wheel that'd I'd like to use, unless there's not enough material which I could understand.
Would it be possible to convert it to a 20G that had a larger compressor cover and do it to it instead?
Same here. I'm looking for a custom 20G as well. With a T51R mod I could tighten the BOV and not worry about surge.
Can this mod work on Vortec chargers?
Have you ever done a velocity stack in a GT3782VA? I have probably 7 of them sitting around from various 6.0s. I'm wondering how silly a T51r modded GT3782VA with a 10 blade turbine wheel would sound.
We replace the covers on them with a gt40 , doing a t51r of a gt40 cover would be a lot easier
@@turbolabamerica What is your email? I might be interested in doing a little work with you just to mess around with a GT3782 to maybe sell to people that are whistle junkies on 6.0s. I deal with quite a few on a daily basis.
it’s slicing the air in half that’s why it’s so loud honestly my garrett screams why? because i’m spinning it into orbit. the spacing doesn’t matter i machine anti surge all my housing and everyone screams... even my little 1749 screams on my generator set.... figured out how to do the ihi and 3 k 2 piece housings ✌🏻
so what do i need to tell my cnc machiner to do ?
Can you build an hx30 pro ?
whats the loudest turbo u guys think? to do a t51?
What big turbo do you have the fit an Audi A4 Quattro 2005 b7 2.0T the at least have 500 hp
Garrett g series
The space need to be smaller and the inner ring needs to be much thinner.
Have you tryed this on a smaller turbo like a t28?
No
I have a 2860 pulsar turbo on my miata with t51r mod from pulsar. Its ridiculously loud. I had no idea what this mod was 6 months ago. I was hesitant going with a pulsar turbo, even more so paying for the t51r mod. I am not disappointed at all. Sounds like a have a supercharger especially at lower boost pressure. My old turbo was basically silent compared to this one.
So do you think that turbochargers with a big compressor/small turbine like the GT2876 are a bad idea?
depends on your hp goals
Bro, I got a few ppl wanting to get their n63tu turbos upgraded. Emailed you awhile back no response yet tho
I have a question, and please forgive my agnorence. I'm planning to do a T51r mod in the future, and not sure if it's viable to install an air filter on the turbo? Is it going to fit? any changes to the sound? Thank you!!
It’s best to use a filter. I live in a construction zone, there is a lot of dirt in the air and rocks. The sound is still loud with the air filter, I have several video clips. I would not risk not using a filter.
So anti surge housing + no blow off valve is fine?
not at all.
Surge isnt what you are describing. Compressor stall from no bov is not surge
Been running no BOV for 2 years , S475 20 psi 700whp, beating on it every chance I get , no problems whatsoever
Matt Gardner compressor will not stall itll slow down thats it
@@4door_papi the term is stall. Its air being forced bacwards. And yes in some cases it will stop
I think I know the guy you are talking about that had no noise, my buddy Devin. He took measurements off of my Boost Labs t51r that makes LOTS of noise. Things sounds like a supercharger lol.
Yes we corrected it
just saw his video today, sounds pretty good
@@Madvillian I have a small vid of my t51r on my page as well.
@Pourtier Beatz Go find it on Devin Niemela's channel. I'm not about to go look for it.
I bought a car gen 4 and it sounds like a blower whine is this normal
Can u still upgrade my td04hl of my 09 acura rdx 2.3
Yes
@@turbolabamerica I'll contact ur shop on Monday thx
@@turbolabamerica how do i get the 6.7 Cummins turbo from you, is it a VGt
@@jamesgasper8630 You'll never get them back...they've had mine for 2 years now. They don't respond to email or they're phone. GL. Great vids horrible customer service.
@@meangreen3k Sounds kind of scary, maybe Boost Labs would be better.
Can you do that to a 7.3 turbo
probably not
Anyone else have a t51r mod and have no spool/whine sound??
How much for a T-51R mod and a 62 to 66mm billet wheel upgrade?
i would like a 51r type mod on my 6.0 powerstroke turbo. PLEASE im very serious
I have it on my 7.3l and its amazing
Can this be done on a ESS blower?
No
T51 mod whistle is because of inlet grooves. There's a pulsar specific vid about it. Your words talk about antisurge..
Would this mod or actually the anti surge mod prevent “barking” when you let out of the throttle quick?
ya
flutter?
more air too escape?
no!
more air in! boost is pulling in air from both sides.
The groove width in the new Precision (nextGen) is larger, they state “more air through the larger AntiSurge” (further down-not up)
air does not escap when
in vacuume “the opposite happens”
look at precision next gen schimetic
Hey so what do you drive? I bet we would all like to see what’s under your hood man 👌
My bmw 335xi in 41 seconds czcams.com/video/xaqIn5KpeV8/video.html
Why is it called a t51r mod? Can you do this to an hx35?
Because the original HKS turbo model was called T51R
The spacing needs to be smaller not bigger and the inner stack needs to be thinner.
I machined it to .200 gap exactly what I measured from an ocd works compressor housing
@@turbolabamerica Don't take Measurements from them take it from A real HKS
I don’t have one to measure
POV: You're here from omgmiata's ig story.
He had me interested until he gave the complete wrong explanation as to what the anti surge housing is for
Have you actually Googled what MWI really means ? Translated Map With Inharsment, have a read and comp wheel design plays a big parts on induction noise
If you need turbos to mod let me know I got 3 laying around
He351ve?
@@turbolabamerica I have a HE351VE that's off of my '14 Ram Cummins and has been sitting in storage collecting dust for a few years. If you want it, lmk.
Turbo Lab America yes
@@turbolabamerica can you guys do my gtx3584rs
I sent my 3176 with this guyto get rebuilt and came back with the same worst play and box came half open look like it got ran over by a truck! won't reply back to me or even try to come with a solution on how to redo a turbo I payed for that never got fixed!! in short don't do business!!
hi can I use your phone or Skype
Send me an email with your Skype or your phone turbolabamerica@gmail.com
OK
First
lol. I have a few turbos for your truck if you want me to save you one
Turbo Lab America hell yeah 🦾🦾👊🏻💪🏻🇺🇸🇺🇸
Austin.. how can able to communicate with you? Send you email no reply mate.. need to convert my GTX3076 to GTX3576.. thank you mate..
@@skotsephrenia1 Find someone else bro. They'll take your turbos, never return your calls, never return your emails and just keep your stuff. Crooks.
How does this guy have his own company? Of course the clearance has to do with the turbo whistle. That’s basically how a dam whistle works. As for his horrible explanation the fucking word your looking for is BACK Pressure!!!
Honestly thats annoying AF