The NEW "GT35R" from Buschur Racing..
And LOL @ a GT-35 turbine being a "choke point".
I'd attribute it more to "hitting the nail on the head" and finding a compressor / turbine combination more in tune with the flow characteristics of an evo engine.
interesting find.
I wonder if they can develope a "37R" with this new improved wheel. That would be something i would look into instead of just upgrading my 35r to this one. Price vs performance.
I wonder if they can develope a "37R" with this new improved wheel. That would be something i would look into instead of just upgrading my 35r to this one. Price vs performance.
Let's see some graphs at the same boost. I already know the answer regardless of what you post I just want to see what you post.
Reading should be pressed harder in school these days. That is very apparent everyday I visit this site.
I did say GENERALLY a larger A/R will make the car spool slower. Thanks for reading, or not reading, not sure what is going on anymore.
Bad news on this turbo. Robert wants more testing. We are going to try another change to the turbo and now I need to collect some more data. This may be awhile guys, sorry.
I did say GENERALLY a larger A/R will make the car spool slower. Thanks for reading, or not reading, not sure what is going on anymore.
Bad news on this turbo. Robert wants more testing. We are going to try another change to the turbo and now I need to collect some more data. This may be awhile guys, sorry.
I pulled the car into the shop for testing last week. We finished our fuel system testing on the car. Then I tested a new custom ground camshaft.
To the point. Today we drilled my manifold for back pressure testing on our GT35R turbo kit. I made 3 back to back pulls with the car with no tuning in 3rd gear. Pulls were done from 3,000 to 7,000 rpm. Each pull the throttle was at 100% at 2,000 rpm. After collecting this data we pulled the turbo off the car, cartridge only. Installed the new turbo into the same turbine housing and put the car back on the dyno.
The new turbo is built by Forced Performance, same company building the LT/Green turbo. Forced Performance makes the investment cast stainless steel 02housing we use on all of our cast manifold turbo kits.
The new turbo is called a GT3582HTA.
To the point. Today we drilled my manifold for back pressure testing on our GT35R turbo kit. I made 3 back to back pulls with the car with no tuning in 3rd gear. Pulls were done from 3,000 to 7,000 rpm. Each pull the throttle was at 100% at 2,000 rpm. After collecting this data we pulled the turbo off the car, cartridge only. Installed the new turbo into the same turbine housing and put the car back on the dyno.
The new turbo is built by Forced Performance, same company building the LT/Green turbo. Forced Performance makes the investment cast stainless steel 02housing we use on all of our cast manifold turbo kits.
The new turbo is called a GT3582HTA.
Bringing this thread back from the dead.
David you never did tell us what your findings were in terms of exhaust backpressure from the turbo swap, and have you measured the stock turbo in order to see how much of a difference there actually is?
And what happened to the cams, I have not heard anymore of them, will they or will they not be available?
Well it has been sitting here waiting for us to test it and I finally got a full day to finish up this additional testing on my car today.
Brief update. My 2004 EVO RS has every single go fast part on it that we make, everyone. The car has run a best of 9.97 at 142.32 mph on radials in full street trim, driving to and from the track.
I pulled the car into the shop for testing last week. We finished our fuel system testing on the car. Then I tested a new custom ground camshaft.
To the point. Today we drilled my manifold for back pressure testing on our
GT35R turbo kit. I made 3 back to back pulls with the car with no tuning in 3rd gear. Pulls were done from 3,000 to 7,000 rpm. Each pull the throttle was at 100% at 2,000 rpm. After collecting this data we pulled the turbo off the car, cartridge only. Installed the new turbo into the same turbine housing and put the car back on the dyno.
The new turbo is built by Forced Performance, same company building the LT/Green turbo. Forced Performance makes the investment cast stainless steel 02housing we use on all of our cast manifold turbo kits.
The new turbo is called a GT3582HTA.
Below is the before and after of the testing. The very first pull with the new turbo showed an increase of 3 psi of boost. I had to adjust the boost controller to bring it back down to the same level of the initial test. The first pull was the highest but with the high boost it was not a fair test. The 2nd pull the car was leaner with this new turbo, also not a fair test. After quite a few runs I got the AFR's back to equal that of the original GT3582. That is the chart below. The most impressive part of this is the area under the curve. This turbo makes considerably more power in the midrange than a standard GT35R does. In some places on the graph you can see it is up as much as 50 whp/ft lbs. This is going to make this turbo much more easy to drive on the street.
You will notice that both of the graphs start out exactly even at 3,000 rpm. If you look at the average at the bottom of the page the new GT3582HTA turbo averages 20 ft lbs of torque more and 18 whp more over the entire rpm band. This is major when you consider at 3,000 rpm they are identical and up top they are close again.
Here is the dyno sheet:
Pricing has not yet been determined on this turbo. It is going to add to the cost of our standard GT35R turbo kit. I am waiting for pricing and when I get it I will post it here.
Thanks for reading.
Brief update. My 2004 EVO RS has every single go fast part on it that we make, everyone. The car has run a best of 9.97 at 142.32 mph on radials in full street trim, driving to and from the track.
I pulled the car into the shop for testing last week. We finished our fuel system testing on the car. Then I tested a new custom ground camshaft.
To the point. Today we drilled my manifold for back pressure testing on our
GT35R turbo kit. I made 3 back to back pulls with the car with no tuning in 3rd gear. Pulls were done from 3,000 to 7,000 rpm. Each pull the throttle was at 100% at 2,000 rpm. After collecting this data we pulled the turbo off the car, cartridge only. Installed the new turbo into the same turbine housing and put the car back on the dyno.
The new turbo is built by Forced Performance, same company building the LT/Green turbo. Forced Performance makes the investment cast stainless steel 02housing we use on all of our cast manifold turbo kits.
The new turbo is called a GT3582HTA.
Below is the before and after of the testing. The very first pull with the new turbo showed an increase of 3 psi of boost. I had to adjust the boost controller to bring it back down to the same level of the initial test. The first pull was the highest but with the high boost it was not a fair test. The 2nd pull the car was leaner with this new turbo, also not a fair test. After quite a few runs I got the AFR's back to equal that of the original GT3582. That is the chart below. The most impressive part of this is the area under the curve. This turbo makes considerably more power in the midrange than a standard GT35R does. In some places on the graph you can see it is up as much as 50 whp/ft lbs. This is going to make this turbo much more easy to drive on the street.
You will notice that both of the graphs start out exactly even at 3,000 rpm. If you look at the average at the bottom of the page the new GT3582HTA turbo averages 20 ft lbs of torque more and 18 whp more over the entire rpm band. This is major when you consider at 3,000 rpm they are identical and up top they are close again.
Here is the dyno sheet:
Pricing has not yet been determined on this turbo. It is going to add to the cost of our standard GT35R turbo kit. I am waiting for pricing and when I get it I will post it here.
Thanks for reading.
P.s Great work, your knowlege and willingness to disclose this type of info is always greatly appreaciated
Last edited by Migsubishi; Feb 8, 2007 at 09:57 AM.
