Do the precision vband in exhaust housings limit power compared to a t4?
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I made 1105 rwhp in my vette with a pair of 6265's and v band housings. If i were to build a kit toady i would without a doubt go with the t4 housing if you have the room. I just had to redo my entire kit cause i built a big motor and the .82 AR wasn't going to work well with a 430 ci.
#4
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A smaller exhaust a/r will almost always cost you power(but make it spool better). A larger exhaust housing means more flow and less back pressure. Which also usually allows more timing, and more power. A/R is just a ratio of area, the v band inlet housing is considered T3 sized. A T3 and T4 housing could have the same A/R but the T4 flow much more.
I have a customer with a 402/small cam/small head and a pair of vband 6766's and they spool very fast and it makes 900 wheel through an auto at 20 psi on e85
I have a customer with a 402/small cam/small head and a pair of vband 6766's and they spool very fast and it makes 900 wheel through an auto at 20 psi on e85
#5
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Ive been researching various TT related stuff lately.
And as far as I am aware, their V-Band housings are all based on T3 units, so is unlikely they will be anywhere near ideal, especially for a bigger motor.
The Tial ones go to much larger A/R's although may not fit those turbos.
And as far as I am aware, their V-Band housings are all based on T3 units, so is unlikely they will be anywhere near ideal, especially for a bigger motor.
The Tial ones go to much larger A/R's although may not fit those turbos.
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A smaller exhaust a/r will almost always cost you power(but make it spool better). A larger exhaust housing means more flow and less back pressure. Which also usually allows more timing, and more power. A/R is just a ratio of area, the v band inlet housing is considered T3 sized. A T3 and T4 housing could have the same A/R but the T4 flow much more.
I have a customer with a 402/small cam/small head and a pair of vband 6766's and they spool very fast and it makes 900 wheel through an auto at 20 psi on e85
I have a customer with a 402/small cam/small head and a pair of vband 6766's and they spool very fast and it makes 900 wheel through an auto at 20 psi on e85
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#8
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If you use a very small A/R housing, it only has a tiny hole in it. A housing with a large A/R has a larger hole, hence slower gas velocities into the turbine so less spool. But more flow at the top end.
So it's a balancing act finding what works best overall for each user.
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No.
If you use a very small A/R housing, it only has a tiny hole in it. A housing with a large A/R has a larger hole, hence slower gas velocities into the turbine so less spool. But more flow at the top end.
So it's a balancing act finding what works best overall for each user.
If you use a very small A/R housing, it only has a tiny hole in it. A housing with a large A/R has a larger hole, hence slower gas velocities into the turbine so less spool. But more flow at the top end.
So it's a balancing act finding what works best overall for each user.
so the turbine wheel wouldn't hurt you if it was small? just run a large a/r with the small turbine?
#10
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But if you used a huge turbine with a minute A/R, then the turbine housing would be the restriction.
As I said, it's a balance between them all.
If you choose a turbine wheel that is too large, you'll never get it to spool
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I hate to bring this back from the dead, but I have been curious as to why people say the Vband Flange is like a T3?
The inlet area is 6.447 compared to 5.98 on a T4 Non Divided flange.
So IIRC, the .81 T4 flange should be tighter on flow that the .82 THV housing.
Does that make sense? Also there are 2 different ARs now, the .63 and .82 housing.
The inlet area is 6.447 compared to 5.98 on a T4 Non Divided flange.
So IIRC, the .81 T4 flange should be tighter on flow that the .82 THV housing.
Does that make sense? Also there are 2 different ARs now, the .63 and .82 housing.
#14
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I hate to bring this back from the dead, but I have been curious as to why people say the Vband Flange is like a T3?
The inlet area is 6.447 compared to 5.98 on a T4 Non Divided flange.
So IIRC, the .81 T4 flange should be tighter on flow that the .82 THV housing.
Does that make sense? Also there are 2 different ARs now, the .63 and .82 housing.
The inlet area is 6.447 compared to 5.98 on a T4 Non Divided flange.
So IIRC, the .81 T4 flange should be tighter on flow that the .82 THV housing.
Does that make sense? Also there are 2 different ARs now, the .63 and .82 housing.
The t4 flange is much larger then the "t3 sized" v-band inlet housings. Precision also calls them "t3 sized".