Is a PTE-70 the right size for LS1?
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From: So Cal
Is a PTE-70 the right size for LS1? It's a PTE-70, P-trim, .81 a/r
Would this turbo be a good choice on a stock bottom end 346ci ?
Also, is there a basic turbo write up online for turbo illiterate people such as myself? (For sizes, trims, boost ranges, etc.)
Thanks in advance.
Would this turbo be a good choice on a stock bottom end 346ci ?
Also, is there a basic turbo write up online for turbo illiterate people such as myself? (For sizes, trims, boost ranges, etc.)
Thanks in advance.
the .81 might be a little too small for the Ls1... good for spool up but will choke a little topend. Though a tangential exhaust housing will noticeably help things.
I am sure others will respond on this.
And even though it is mustang based.... http://www.turbomustangs.com/ has a ton of info.
Go to "main site" then "links"
Also "Maximum boost" is a great book.
I am sure others will respond on this.
And even though it is mustang based.... http://www.turbomustangs.com/ has a ton of info.
Go to "main site" then "links"
Also "Maximum boost" is a great book.
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From: orlando, florida
I think that turbo would work good for a stock ls1 @8-9psi and when you get good internals it`ll still work decent at 12psi. good turbo to grow with IMO. The .81 A/R will be a little slower spool and better top end Not the other way around. Probly spool around 3100-3200rpm On stock CI. with good exhaust.
Originally Posted by MYTURBOT/A
The .81 A/R will be a little slower spool and better top end Not the other way around. Probly spool around 3100-3200rpm On stock CI. with good exhaust.
A P-trim .81 in a T04 turbine housing is a little small for a single IMO. A tang housing would be better if you have to go /w the 81.
I'd go with a .96 personally.
my twins are .69 P-trim on-center. They spool by 3500 or so
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From: So Cal
Originally Posted by y2khawk
Compared to what?
A P-trim .81 in a T04 turbine housing is a little small for a single IMO. A tang housing would be better if you have to go /w the 81.
I'd go with a .96 personally.
my twins are .69 P-trim on-center. They spool by 3500 or so
A P-trim .81 in a T04 turbine housing is a little small for a single IMO. A tang housing would be better if you have to go /w the 81.
I'd go with a .96 personally.
my twins are .69 P-trim on-center. They spool by 3500 or so
Thanks Harlan, and the rest of you guys.
Can one of you explain the .81 and .96 numbers? What part or function are they describing on the turbo?
A/R = area of the discharge scroll on the housing versus the radius from the shaft of the turbo.
think of it like putting your finger over the end of a garden hose. a smaller hole, and the water comes out faster but you can't get as much out in a given time. That's like a smaller A/R
bigger hole and the flow is slower, but you can get more flow over time.
faster flow will reduce spool time, but limit top end flow capability.
think of it like putting your finger over the end of a garden hose. a smaller hole, and the water comes out faster but you can't get as much out in a given time. That's like a smaller A/R
bigger hole and the flow is slower, but you can get more flow over time.
faster flow will reduce spool time, but limit top end flow capability.
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From: So Cal
Originally Posted by y2khawk
A/R = area of the discharge scroll on the housing versus the radius from the shaft of the turbo.
think of it like putting your finger over the end of a garden hose. a smaller hole, and the water comes out faster but you can't get as much out in a given time. That's like a smaller A/R
bigger hole and the flow is slower, but you can get more flow over time.
faster flow will reduce spool time, but limit top end flow capability.
think of it like putting your finger over the end of a garden hose. a smaller hole, and the water comes out faster but you can't get as much out in a given time. That's like a smaller A/R
bigger hole and the flow is slower, but you can get more flow over time.
faster flow will reduce spool time, but limit top end flow capability.
Couldn't find what a "tang...somthingoranother housing" was though
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Verdad Gallardo Tang is for tangential versus on-center for the housing style.
Refers to the location of the inlet to the turbine housing, as in the inlet is tangential to the scroll. Tang housings are generally a little more efficient, but on-centers are nice for packaging. Tang housings usually have a V-band style discharge which is nice of the downpipe fitting, while on centers use the standard 4 bolt T04 style flange.
On-centers are nice cause you can upgrade sizes and things stay in the same place.
you can see the difference here...
http://64.225.76.178/catalog/thousing.html
Refers to the location of the inlet to the turbine housing, as in the inlet is tangential to the scroll. Tang housings are generally a little more efficient, but on-centers are nice for packaging. Tang housings usually have a V-band style discharge which is nice of the downpipe fitting, while on centers use the standard 4 bolt T04 style flange.
On-centers are nice cause you can upgrade sizes and things stay in the same place.
you can see the difference here...
http://64.225.76.178/catalog/thousing.html
thanks for bringing that to my attention Y2KHAWK. 
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From: So Cal
Originally Posted by y2khawk
Tang is for tangential versus on-center for the housing style.
Refers to the location of the inlet to the turbine housing, as in the inlet is tangential to the scroll. Tang housings are generally a little more efficient, but on-centers are nice for packaging. Tang housings usually have a V-band style discharge which is nice of the downpipe fitting, while on centers use the standard 4 bolt T04 style flange.
On-centers are nice cause you can upgrade sizes and things stay in the same place.
Refers to the location of the inlet to the turbine housing, as in the inlet is tangential to the scroll. Tang housings are generally a little more efficient, but on-centers are nice for packaging. Tang housings usually have a V-band style discharge which is nice of the downpipe fitting, while on centers use the standard 4 bolt T04 style flange.
On-centers are nice cause you can upgrade sizes and things stay in the same place.
BTW,I was looking at all of the graphs for the different turbos on the website that MyTurboTA recommended.
When comparing turbos is the max rpm that it spins and flow per min the major things to look at when deciding what is best for your engine?
