Which Turbo for solid mid 10's

Wayne A Bender · Sep 28, 2016

I am beating my mind up trying to figure out what turbo to run, I looking for mid 10's solid with room to grow and maybe dip into the 9's. I just completed my short block and here is my build as follows

020 Standard bore
Diamond Pistons
4340 forged steel crank
K Rods
I'm looking to go with aluminum light ported heads
Harland Rockers
PTE SLIC
Alcohol injection
80ilb Injectors
I have not decided on what camshaft billet 218/212 or 212/206
Stage 2 tranny by my Man Vince Janis
Currently I have a Pro torque 3200 LU converter, probably have to go to a PTC
The car will be 90/% Street 10/% track time, I also want good street manners
So what Turbo
PT6266 non BB
PT 6466BB GEN 2
PT 6766 non BB

Please someone chime in and help me

V6sleeper · Sep 28, 2016

Mid solid 10's without sweating it and room to grow= 6466....and go with the Ptc n/l

Mr.Spool · Sep 28, 2016

Wayne A Bender said:
I looking for mid 10's solid with room to grow and maybe dip into the 9's.

there are a lot of turbos to choose for solid mid 10s.9s is a different story 64 to 67 billet compressor minimum 65 ex.

Quick6'n'-K.C. · Sep 28, 2016

I'd sell you my dual ball bearing polished precision 67 with 4 inch inlet

Good for big hp

Quick6'n'-K.C. · Sep 28, 2016

I was setting it up for external gate, I did not enlarge the wastegate hole

I also have the pte wastegate with rjc ball and spring

It's a pte 6776 dual ball bearing

blklt1z28 · Sep 28, 2016

If you want to dip into the 9's then the 6766 will do it pretty easily. The 6466 will do it also but it won't be as easy. Guys in THS have gone 9.40's with a 6766 with an E cover......IIRC.

Plus the 6766 JB is much cheaper than a 6466.

Wayne A Bender · Sep 28, 2016

blklt1z28 said:
If you want to dip into the 9's then the 6766 will do it pretty easily. The 6466 will do it also but it won't be as easy. Guys in THS have gone 9.40's with a 6766 with an E cover......IIRC.

Plus the 6766 JB is much cheaper than a 6466.

But is it quick spool and streetable

blklt1z28 · Sep 28, 2016

Wayne A Bender said:
But is it quick spool and streetable

Very true, but so is the 6766 as long as it's setup properly. He already stated he going to swap converters so......

But there is a trade off in everything we do in this hobby.

Mr.Spool · Sep 28, 2016

blklt1z28 said:
Plus the 6766 JB is much cheaper than a 6466.

But it doesn't spool as fast and there is only a 35hp difference between the 2 turbos all out.

Quick6'n'-K.C. · Sep 28, 2016

Just speaking on how tight that 3200 lock up might be, depending on how long you like to build boost on a non ball bearing. I would go looser converter, my DD was 3800 and a lock up. Loved it

Nobody here wants to comment on the 6776 dual bb I posted?

You can go mid 10s on a te45a and eat a chilly dog while going down the track. Some turbos make it easier!

bison · Sep 28, 2016

Mr.Spool said:
But it doesn't spool as fast and there is only a 35hp difference between the 2 turbos all out.

On one car we switched from a 6466 to an MFS 6766 and picked up over 40whp peak and over 100whp at 6000rpm. The 64 was run all in. The 67 wasn't all in yet. I'd bet a lot the peak power would have been up close to 100whp and 130whp at 6000+rpm going all in. Granted it was a t4 housing but I doubt it the exhaust housing mattered that much. From 4100 it would hit full boost in less than half a second on an 8.7:1 248ci.

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Quick6'n'-K.C. · Sep 29, 2016

bison said:
On one car we switched from a 6466 to an MFS 6766 and picked up over 40whp peak and over 100whp at 6000rpm. The 64 was run all in. The 67 wasn't all in yet. I'd bet a lot the peak power would have been up close to 100whp and 130whp at 6000+rpm going all in. Granted it was a t4 housing but I doubt it the exhaust housing mattered that much. From 4100 it would hit full boost in less than half a second on an 8.7:1 248ci.

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T4 vs Buick 3 bolt housing no difference?
Do tell. Lol. Really?

Quick6'n'-K.C. · Sep 29, 2016

I forget. I come across a a hole

Hi bison! Still lifting?

bison · Sep 29, 2016

Quick6'n'-K.C. said:
T4 vs Buick 3 bolt housing no difference?
Do tell. Lol. Really?

Maybe 20-30hp. But that's about it. Even if all in I doubt it would have been more than 50whp difference due to the housing itself. Fwiw the car weighed 3850 with driver and trapped 112 eighth and it wasn't all In than day with the 64 in less than ideal air. We never got times with the 67 but 70-130mph in 3.5 sec. mid/low 9 sec power for sure

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Mr.Spool · Sep 29, 2016

bison said:
We never got times with the 67 but 70-130mph in 3.5 sec. mid/low 9 sec power for sure

I have a 64 that does that here,im always looking for improvements on certain cars haven't touched this one in a while cause it runs too good.still think this car could get 100whp increase from a 67?was looking at a 6870 but not sold yet.

Mr.Spool · Sep 29, 2016

bison said:
Granted it was a t4 housing but I doubt it the exhaust housing mattered that much. From 4100 it would hit full boost in less than half a second on an 8.7:1 248ci.

that's very good response out of a 4 bolt.

bison · Sep 29, 2016

Mr.Spool said:
that's very good response out of a 4 bolt.

There's no difference in response vs a 3 bolt.

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Mr.Spool · Sep 29, 2016

bison said:
There's no difference in response vs a 3 bolt.

3 bolt .85 compared to 4 bolt?

V6sleeper · Sep 29, 2016

bison said:
On one car we switched from a 6466 to an MFS 6766 and picked up over 40whp peak and over 100whp at 6000rpm. The 64 was run all in. The 67 wasn't all in yet. I'd bet a lot the peak power would have been up close to 100whp and 130whp at 6000+rpm going all in. Granted it was a t4 housing but I doubt it the exhaust housing mattered that much. From 4100 it would hit full boost in less than half a second on an 8.7:1 248ci.

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Any info on the back pressure difference between the two turbos at 6000rpm?

bison · Sep 29, 2016

V6sleeper said:
Any info on the back pressure difference between the two turbos at 6000rpm?

Unfortunately we weren't setup to log those on that car. The 64 was done making power at 31-32psi on that engine. The 67 wasn't done at 32-33psi where we ran out of injector.

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Which Turbo for solid mid 10's

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