Time for some boost! VSR Motorsports Single Turbo Kit

GaleForce · 01-15-2015, 11:47 PM

Congrats!

jwick · 01-15-2015, 11:49 PM

Quote:

Originally Posted by MidnightBlueZ

Got some numbers tonight, car did really well! Issues were finally resolved but we did have one minor setback. The wastegate spring was maxed out at 14psi so with that said on E85 and a conservative tune it made 603rwhp 503wtrq with a peak of 545ish! Trying to get the vid from Bobby, however, it is posted on their Facebook page. I took a screenshot of the graph for now. We are going to switch out the spring next week ago go for 700+ as long as we can anchor the rear end down. My tires suck for this kind of power and the car is on stock suspension. There's a chance it could've put down more if the tires didn't light up the dyno. But I'm relieved and estatic with the current results. The curve is very nice.. and I'm told it is running solid! Bobby might throw on some slicks from another car for another pass with the stiffer spring to see what happens. That's all I really have at the moment but I'll be sure to share more as it comes.

Thanks

Nice...What turbo comes with that kit?

MidnightBlueZ · 01-15-2015, 11:56 PM

Quote:

Originally Posted by jwick

Nice...What turbo comes with that kit?

Precision 6266

jwick · 01-15-2015, 11:57 PM

Quote:

Originally Posted by MidnightBlueZ

Precision 6266

Standard or Twin Scroll?

MidnightBlueZ · 01-16-2015, 12:17 AM

Quote:

Originally Posted by jwick

Standard or Twin Scroll?

Sorry it's JB so I guess standard? Vband setup

jwick · 01-16-2015, 12:28 AM

Quote:

Originally Posted by MidnightBlueZ

Sorry it's JB so I guess standard? Vband setup

That's related to the inlet flange.

Twin Scroll

Regular

MidnightBlueZ · 01-16-2015, 12:50 AM

My bad.. Mine is V-Band inlet .82 A/R with V-Band discharge

Looks like this.. Pictures are hard to find that just came up quick.

jwick · 01-16-2015, 12:57 AM

Quote:

Originally Posted by MidnightBlueZ

My bad.. Mine is V-Band inlet .82 A/R with V-Band discharge

Looks like this.. Pictures are hard to find that just came up quick.

Ah...not twin scroll. V-band connections on both ends is nice though

MidnightBlueZ · 01-16-2015, 01:07 AM

Quote:

Originally Posted by jwick

Ah...not twin scroll. V-band connections on both ends is nice though

thanks, does make it easy to place or remove. Plus with the way their manifold is setup and location of the turbo I don't know if there'd be enough room for that size a flange?

jwick · 01-16-2015, 01:13 AM

Quote:

Originally Posted by MidnightBlueZ

thanks, does make it easy to place or remove. Plus with the way their manifold is setup and location of the turbo I don't know if there'd be enough room for that size a flange?

Yeah...it does look like a pretty tight fit for that kit.

It also gives me an idea why the VSR and BP kit, running the same turbo, produce completely different power bands.

MidnightBlueZ · 01-16-2015, 02:02 PM

Quote:

Originally Posted by jwick

Yeah...it does look like a pretty tight fit for that kit.

It also gives me an idea why the VSR and BP kit, running the same turbo, produce completely different power bands.

Do you have a graph I can check out with your powerband? Wondering how much difference there is..

COSMO · 01-16-2015, 03:27 PM

sub'ed

Boosted Performance · 01-16-2015, 04:07 PM

Quote:

Originally Posted by jwick

Yeah...it does look like a pretty tight fit for that kit.

It also gives me an idea why the VSR and BP kit, running the same turbo, produce completely different power bands.

Although they are both 6266 turbos, they are drastically different when it comes to performance due to the turbine housing size.

The V-band turbine (.82 a/r) is significantly smaller in physical size, and flows a lot less than the T4 1.15 a/r. I would only ever suggest the (largest available) 1.32 a/r for built engines...why?:

When I performed flow tests on the BP 1.15 a/r turbine by measuring the EBP (exhaust back pressure...pressure in the exhaust before the turbine) I found that the 1.15 a/r turbine is optimal for up to 600whp (6-14 psi of boost on pump gas) on this engine. Pushing more than that is possible, but efficiency goes out the window. The VHR is extremely efficient, and moves a lot of air...so the larger turbine IMO is the only way to go.

Basically, you do not want the exhaust back pressure to exceed the manifold boost pressure by more than 2 fold. So, if you are at 12 psi of boost, the EBP should not exceed 24psi. The 1.15 a/r turbine was tested at around 18 psi of EBP when the manifold pressure was at around 11-12 psi.

What most people forget is that whatever comes out of the compressor side is sent to the combustion chamber, fuel is added, and the mixture is ignited. All this hot gas has only one way out, and that is through a turbine housing. If the turbine is small, the exhaust will not vacate the combustion chamber as efficiently, in tern not allowing fresh new air to enter. (Yes, some goes through the wastegate, but most has to go through the turbine).

This is why I am so excited about the all new PTE 6870 turbo. It has a larger compressor wheel, but more importantly a much larger turbine wheel (high flow capability). This turbo should be the number one choice for those that have their engines built, and really want to push things the extra mile.

jwick · 01-16-2015, 04:24 PM

Quote:

Originally Posted by Boosted Performance

Although they are both 6266 turbos, they are drastically different when it comes to performance due to the turbine housing size.

The V-band turbine (.82 a/r) is significantly smaller in physical size, and flows a lot less than the T4 1.15 a/r. I would only ever suggest the (largest available) 1.32 a/r for built engines...why?:

When I performed flow tests on the BP 1.15 a/r turbine by measuring the EBP (exhaust back pressure...pressure in the exhaust before the turbine) I found that the 1.15 a/r turbine is optimal for up to 600whp (6-14 psi of boost on pump gas) on this engine. Pushing more than that is possible, but efficiency goes out the window. The VHR is extremely efficient, and moves a lot of air...so the larger turbine IMO is the only way to go.

Basically, you do not want the exhaust back pressure to exceed the manifold boost pressure by more than 2 fold. So, if you are at 12 psi of boost, the EBP should not exceed 24psi. The 1.15 a/r turbine was tested at around 18 psi of EBP when the manifold pressure was at around 11-12 psi.

What most people forget is that whatever comes out of the compressor side is sent to the combustion chamber, fuel is added, and the mixture is ignited. All this hot gas has only one way out, and that is through a turbine housing. If the turbine is small, the exhaust will not vacate the combustion chamber as efficiently, in tern not allowing fresh new air to enter. (Yes, some goes through the wastegate, but most has to go through the turbine).

This is why I am so excited about the all new PTE 6870 turbo. It has a larger compressor wheel, but more importantly a much larger turbine wheel (high flow capability). This turbo should be the number one choice for those that have their engines built, and really want to push things the extra mile.

Alright. So I'll pose a question. My dose the smaller turbine a/r produce more HP at a lower psi? Likewise why does the smaller turbine produce less low end torque?

Guess that was two questions

Boosted Performance · 01-16-2015, 04:33 PM

Quote:

Originally Posted by jwick

Alright. So I'll pose a question. My dose the smaller turbine a/r produce more HP at a lower psi? Likewise why does the smaller turbine produce less low end torque?

Guess that was two questions

I'd have to see the two kits on the same dyno, with the same timing map for a true comparison. I think VSR uses 2.5" charge pipes with the OEM MAF sensors, and my customers find that the MAF sensors are maxed out in 2.75" charge pipes at around 530whp, while VSR has been able to push them much further than that in pipes that are 18% smaller. Again, side by side runs on the same dyno/conditions would be a good comparison.

This pull was also on E85...very different than pump gas.

On a side note...hope that nobody takes my posts as a negative comment towards the VSR kit. VSR has made a lot of these, and they have proven themselves to perform very well. It is very different than what I offer in a kit, and some customers will find that the VSR kit is superior to the BP kit, and vice versa. It will all depend on the customers comfort level, and what they are looking at doing with the car. At the end of the day, if you step on the gas, and it puts a smile on your face...that is all that matters.

01-15-2015, 11:47 PM	#136 (permalink)
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