How does the Turbonetics exhaust housing fit into the equation?

Chris996

Member
A lot of talk, both positive and negative, on a the effect of a smaller exhaust housing. Particularly different brands which are similarly listed as the same size.
How does the Turbonetics exhaust housing stack up to the Garret and Precision?
 

Sweet6

Well-Known Member
They are fine they are just different than the PTE. Most people think the Turbnetics is a tad smaller. At least with the .63. If that is the case it will spool a little faster and then it wont support the same max power. it is one of those preferences of what you want. But it is pretty much splitting hairs unless you are looking to max everything out IMO.
 

Mr.Spool

Well-Known Member
A lot of talk, both positive and negative, on a the effect of a smaller exhaust housing. Particularly different brands which are similarly listed as the same size.
How does the Turbonetics exhaust housing stack up to the Garret and Precision?
in a 3 bolt ex housing tnetics made both the smaller .63 and the larger.82,so did garret.pte makes a .63 (closer to a .72)which is oversized and a larger .85 that is also oversized.the tnetics/garrett housings are lighter,pte are heavier castings.the effects of ex housings greatly effect the spool time and response of the turbo,as oversizing will lead to turbo lag,undersizing leads to an increase in back pressure,proper sizing leads to a combo with low turbo lag and the ability to get the car moving right off the throttle.the initial opening on the tnetics housings (slightly under 2.5 inch)regardless of size are a little smaller than the pte at 2.5 also.
 

Mr.Spool

Well-Known Member
How does the Turbonetics exhaust housing stack up to the Garret and Precision?
a .63 ex housing from turbonetics has run into the 9 sec range on a turbo buick,stock stroke 3.8 on both iron and alum heads,on a real street car.but so has a garret and pte
 

Chris996

Member
Would replacing a pte .63 exhaust housing in a 67mm turbo to a Turbonetics .63 be worth the time and effort to have it machined to improve spool time?
I see it is common to make the pte to Garret switch.
I am moving to a 67mm turbo and am already expecting a lazier spool with my PATS 3200 lock up.
I realize my TC is thought to be good for only a row boat anchor but I also have this Turbonetics .63 sitting on my workbench.
 

TTA976

Active Member
Without a pressure transducer in the combustion chamber it would be difficult to determine the actual pressure. Does anyone have actual logs of a nine second or low 10 second car with a true 63 housing? Seen logs posted whipping 49 / .63
 

TTA976

Active Member
Remember taking the car out making 2 back to back passes on hot summer night tuning /watching mph on gtech ...
Should have got a temperature gun off Amazon and tested the exhaust housing ...it got so hot!... you know why? because it’s so freaking small! like 1.5” wide lol oh ya ur alky
 

Sweet6

Well-Known Member
I don't have a direct comparison but I switched from a PTE .85 to a PTE .63 with a 6265 DBB and it was a pretty significant difference in spool up in around town driving and the dragstrip. At the track I could get the same 60ft times launching at 2lbs of boost with the .63 as with 6lbs with the .85. And then around town the .63 came up on boost much faster.

I don't think there will be much difference between the PTE .63 and the Turbonetics .63. But if you can do it cheap and easy do it and report back,
 

Mr.Spool

Well-Known Member
I am moving to a 67mm turbo and am already expecting a lazier spool with my PATS 3200 lock up.
I realize my TC is thought to be good for only a row boat anchor but I also have this Turbonetics .63 sitting on my workbench.
try the turbo the way it is,then if you dont like the response you have a choice to swap the housing or get a new converter.
 

Mr.Spool

Well-Known Member
Does anyone have actual logs of a nine second or low 10 second car with a true 63 housing? Seen logs posted whipping 49 / .63
yes.i have thousands of logs and thousands of hrs tuning and rd these cars.even logs of a 10 sec 49 car that had egts of 1250/1350 degrees with a garret .63.
 

TTA976

Active Member
initial opening on a tnetics ex housing is just under 2.5 wide.
All that exhaust gas out that little tiny opening? No way low EGT’s like that on a 66/70 with tnetics .63 10 flat or high 9 ... plz post pressure transducer at that pass.

Let’s see that with Race Gas only want those EGts...
 

TTA976

Active Member
Don’t tell ppl that shit they are going think they can run 9s with true .63 with low low egts ...not the case!
 

TTA976

Active Member
yes.i have thousands of logs and thousands of hrs tuning and rd these cars.even logs of a 10 sec 49 car that had egts of 1250/1350 degrees with a garret .63.
Hmmmm I have log saved Bison ran 49 .63 ran it for all its worth... you ain’t putting that tiny 49 .63 on my car and whipping it that hard lmao.
 

Mr.Spool

Well-Known Member
Hmmmm I have log saved Bison ran 49 .63 ran it for all its worth... you ain’t putting that tiny 49 .63 on my car and whipping it that hard lmao.
my 49 car back in the day ran a best of 10.67 on a garret .63 with the egts that i wrote.the .pte .85 exhaust housing was the slowest tested at the dragstrip in both mph and et,the pte .63 recorded the highest mph,the garret.63 et'd the best.my friends car went 10.7 on c16 with a 44 and garret .63,he didnt log anything,i did on my car.running all the boost is only 1 part of the equation when you say all in.
 
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