6466 Turbo Talk.

[Haulz A]

I only see a few different turbos available on the hpt website.
Their 7675 rated for 1200 and is on par with several other companies out there that have released their new designs.
Their 6466 is rated at 950 off their own website
Which is on par with other turbo manufacturers as well and also
Available in 3 bolt which is cool.
Since there is 0 info on if it's a new design compressor wheel or just what is already out their and available as well as the turbine wheel design it might be hard for some people to purchase,but in truth I have never meet a 64 billet wheel I didnt like.
Also when it breaks who is repairing it?
I like a 4 year warranty though

Mr Spool,
I talked to Mike Licht about some of the same questions you have about the new turbo- his reply concerning the issues you brought up was- they are working on a 6766, 6768, or a 6770 turbo design as well which should be release soon. Concerning the compressor/turbine wheel- they are a totally different design from any of the past wheels used on Buick turbos according to Mike Licht. Hopefully we will see some significant improvement as for as reliability and performance.

Haulz A

 

[TType85]

Since there is 0 info on if it's a new design compressor wheel or just what is already out their and available as well as the turbine wheel design it might be hard for some people to purchase,but in truth I have never meet a 64 billet wheel I didnt like.

We will see how the 4-bolt version works I was going to a EFR turbo (9174) but I feel it would have been a bit too big to have the transitional response I want on my combo. They are priced a bit below what PTE sells theirs for.

One thing to keep in mind is the center sections in these and a lot of the newer design turbos use a smaller bolt patter for the oil return and you will need to modify your return to fit.

 

[Haulz A]

The wheels have a curve design similar to the HPT Promod turbos they produce- just in a smaller frame size

 

[turbobuick]

So if you have a Precison slic you'll need to keep the stock style boost actuator?

Or make an elbow which is what I am going to do. I am also going to tie the discharge back into the downpipe. I bet Mike will probably make something for people with a SLIC, Vibrant makes the flanges and they are pretty cheap.

Turbobuick, Tial 44mm wg?
Curious what that can size can get as the lowest psi, post back later if you can.

Yes it is the one I had on my TSO motor which I am going to use the new piston style WG on my new build. I ran this with a very light spring with CO2, not sure if I am and going to run CO2 with dome control or see if I can get it to work with a single solenoid in closed loop with a heavier spring, like I tried to make work with the stock actuator.

View attachment 389988
We will see how the 4-bolt version works I was going to a EFR turbo (9174) but I feel it would have been a bit too big to have the transitional response I want on my combo. They are priced a bit below what PTE sells theirs for.

One thing to keep in mind is the center sections in these and a lot of the newer design turbos use a smaller bolt patter for the oil return and you will need to modify your return to fit.
View attachment 389989

They also run a restrictor in the oil feed which is -4. I was looking that and noticed how tiny it is, I am probably just going to make a -10 line since my oil return actually goes into the front cover.

I will post some updates but its gonna be awhile my Ttype is going into winter storage and I am full steam ahead on getting my GN back together and running which will keep me pretty busy for awhile lol!

 

[TType85]

They also run a restrictor in the oil feed which is -4. I was looking that and noticed how tiny it is, I am probably just going to make a -10 line since my oil return actually goes into the front cover.

Yeah, if you are going in to the front cover or oil pan, it's easy to make one. Going to the stock location you can't really beat the stock setup; I had the flange modified so it fits the bolt pattern now.

 

[Mr.Spool]

View attachment 389988
We will see how the 4-bolt version works I was going to a EFR turbo (9174) but I feel it would have been a bit too big to have the transitional response I want on my combo. They are priced a bit below what PTE sells theirs for.

One thing to keep in mind is the center sections in these and a lot of the newer design turbos use a smaller bolt patter for the oil return and you will need to modify your return to fit.
View attachment 389989

I just a -10 with drain tube off a badass new triple bbb comp turbo.
Got rid of the stock stuff.

 

[Mr.Spool]

The wheels have a curve design similar to the HPT Promod turbos they produce- just in a smaller frame size

Yup curved blades with lightweight wheels are the thing nowadays.
It's a great time to be a turbo owner.

 

[turbobuick]

Yup curved blades with lightweight wheels are the thing nowadays.
It's a great time to be a turbo owner.

Yep can't wait to see how a curved blade compressor wheels work on its big sister! Which will probably be running on my GN before the HPT 6466 makes it on to my T-type. That is only a mid frame 88!

lol!

 

[Mr.Spool]

Yep can't wait to see how a curved blade compressor wheels work on its big sister! Which will probably be running on my GN before the HPT 6466 makes it on to my T-type. That is only a mid frame 88!View attachment 389991lol!

View attachment 389992

 

[Mr.Spool]

Yep can't wait to see how a curved blade compressor wheels work on its big sister! Which will probably be running on my GN before the HPT 6466 makes it on to my T-type. That is only a mid frame 88!View attachment 389991lol!

View attachment 389992

I will be hammering on a new 88mm with the largest t4 out there in the spring
Looks like the new stuff will go all the way to where it needs a t5 or 6 to let it breath.
Should be a good time

 

[Mr.Spool]

Mr Spool,
I talked to Mike Licht about some of the same questions you have about the new turbo- his reply concerning the issues you brought up was- they are working on a 6766, 6768, or a 6770 turbo design as well which should be release soon. Concerning the compressor/turbine wheel- they are a totally different design from any of the past wheels used on Buick turbos according to Mike Licht. Hopefully we will see some significant improvement as for as reliability and performance.

Haulz A

New design then guys get their $$ worth
In the end though these are small frame turbos and when you really push them they will let you know.

 

[turbobuick]

I will be hammering on a new 88mm with the largest t4 out there in the spring
Looks like the new stuff will go all the way to where it needs a t5 or 6 to let it breath.
Should be a good time

I have been pretty fast on a T4 and this new turbo has a 3" Vband. I was considering going T6 but the guy at Bullseye was against the idea on a 4.5l V6. So I am going to stick with that for now. I know what we did with a billet 4788 T4 back in the day and Bullseye is telling me this one should be worth 2-300 more HP which I find hard to believe considering we were at 1400+ in 2009 with that PTE T4 88.

LMK what you are planning to run unless of course its some super secret NT grudge no prep race deal.

 

[Haulz A]

New design then guys get their $$ worth
In the end though these are small frame turbos and when you really push them they will let you know.

I agree with you concerning pushing a small frame turbo really hard- I’ve broken three 6766 precision turbos shafts since 2015 - approximately one every 18 months or so- I switch to Works turbochargers which is a Garrett center cartridge design with Works turbine shaft and compressor blades- so far I’ve beat on it for a couple of years without failure - small shaft turbochargers will only take (X) amount of abuse before they give up

 

[turbobuick]

I agree with you concerning pushing a small frame turbo really hard- I’ve broken three 6766 precision turbos shafts since 2015 - approximately one every 18 months or so- I switch to Works turbochargers which is a Garrett center cartridge design with Works turbine shaft and compressor blades- so far I’ve beat on it for a couple of years without failure - small shaft turbochargers will only take (X) amount of abuse before they give up

Which turbine housing on PTE units 3-bolt?

 

[Mr.Spool]

I have been pretty fast on a T4 and this new turbo has a 3" Vband. I was considering going T6 but the guy at Bullseye was against the idea on a 4.5l V6. So I am going to stick with that for now. I know what we did with a billet 4788 T4 back in the day and Bullseye is telling me this one should be worth 2-300 more HP which I find hard to believe considering we were at 1400+ in 2009 with that PTE T4 88.

LMK what you are planning to run unless of course its some super secret NT grudge no prep race deal.

It will a ton more power and spool faster.
The new 88s will do 1900+ hp depending on ex wheel and stepping into the t6 or v band housings.
The 4 bolt twin scroll stuff at 1.30 range will do 1600+
Most of the new turbos are limited by the ex housing.
I do run in a world where things are kept under that hat
But I will always have a conversation and will stop where I feel I need too without trying to offend.
But I'm game till that point.
I have many turbos from different manufacturers and a few custom turbos.

 

[Mr.Spool]

I agree with you concerning pushing a small frame turbo really hard- I’ve broken three 6766 precision turbos shafts since 2015 - approximately one every 18 months or so- I switch to Works turbochargers which is a Garrett center cartridge design with Works turbine shaft and compressor blades- so far I’ve beat on it for a couple of years without failure - small shaft turbochargers will only take (X) amount of abuse before they give up

Nice!
A subject most dont like to talk about
I have broken many overspending the compressor with very high backpressure.
And it didnt matter who built it

 

[Mr.Spool]

I agree with you concerning pushing a small frame turbo really hard- I’ve broken three 6766 precision turbos shafts since 2015 - approximately one every 18 months or so- I switch to Works turbochargers which is a Garrett center cartridge design with Works turbine shaft and compressor blades- so far I’ve beat on it for a couple of years without failure - small shaft turbochargers will only take (X) amount of abuse before they give up

Its not the shaft size or center section really
It's the combo of wheels and how fast that compressor is spinning and the backpressure.
I've been 3 to 1 on backpressure and made a shit ton power.

 

[Haulz A]

Which turbine housing on PTE units 3-bolt?

Its a THS legal three bolt 6766 bb (3X2) compressor cover, .85 AR turbine cover- I've broken three shafts on this precision turbo's. I really push it to the limit with my combo- it hits 2:1 back pressure by 29-30 psi of manifold boost pressure- plus about 2-4 psi pressure drop across the intercooler. With the added pressure drop, plus high back pressure- realistically the turbo output is about 35 psi of boost pressure at the compressor wheel base on the data log info. Basically in-order to achieve 35 psi of manifold boost pressure- the compressor will be producing approximately 40 psi. Thaz what it takes to make 700 plus RWHP with a small restricted three bolt turbine cover and a (3X2) compressor cover turbo. Thaz what makes this class really interesting- you build power around a restrictive turbo combo- Anyone can add a larger turbo and make power but do it a lesser turbo.

Haulz A

 

[Mr.Spool]

Its a THS legal three bolt 6766 bb (3X2) compressor cover, .85 AR turbine cover- I've broken three shafts on this precision turbo's. I really push it to the limit with my combo- it hits 2:1 back pressure by 29-30 psi of manifold boost pressure- plus about 2-4 psi pressure drop across the intercooler. With the added pressure drop, plus high back pressure- realistically the turbo output is about 35 psi of boost pressure at the compressor wheel base on the data log info. Basically in-order to achieve 35 psi of manifold boost pressure- the compressor will be producing approximately 40 psi. Thaz what it takes to make 700 plus RWHP with a small restricted three bolt turbine cover and a (3X2) compressor cover turbo. Thaz what makes this class really interesting- you build power around a restrictive turbo combo- Anyone can add a larger turbo and make power but do it a lesser turbo.

Haulz A

Nicely done
I wont tell you how many I have broken lol
But none really hold up in very high overspeed backpressure situations.
When the cover is big enough and the wheels are moving the volume the 3 bolt ex housing is the next restriction and will do the same thing to the shafts.
That's an interesting class for sure.
You pushed it as hard as it can go on that cover and wheel combo it seems.

 

[TType85]

I wont tell you how many I have broken lol
But none really hold up in very high overspeed backpressure situations.

I wonder if that is why HPT lists this on their sales stuff:

2. Stronger shaft wheel weld joint for durability