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.

 

Thanks for sharing the info.

I'm not sure how to read the above. Does the "new 35R" make more power AND more torque. Or is it making more torque at the expense of bhp?

EDIT: Ooops, nevermind re-read your post. Makes more power and torque.

 

Very cool, how much boost is the badbish running?

 

wow.... an average of only 207 ftlb of torque and 193hp from 3k to 7k. a stock turbo can do better. must be a drag/street racing setup only huh.

however, considering you are comparing the two 35R's i would have to say the new one you tested is considerably better, so good job with that!

 

Hey David, Do you think i could send back my old turbo, throw in extra money, and get the new gt35r? kind of like the 20g turbo thing?

if so i think im going to have to do this

are you going to keep the same manifold as before?

 

I don't want to start any trouble, but being that your car is fully built why would you only rev it to 7000 rpm's, I would be interested in seeing what happens with the new turbo after that point.

 

Nice.

 

really would like to see the price on this ...will be in the market for a new turbo this year .

 

i want that new 35r....damn

 

Were those runs done at Pump or Race gas?

 

The HP and Torque aren't even graphed up to 7K either. They are cut off at around 6800ish RPM.

I agree this test is weird in that the fully-built motor was only taken to 7K on a GT35 turbo

 

Why don't you go look at all of the buschur dynographs and you tell me how many go past 7K? There is nothing wierd going on and it sure has hurt them running 8's hasn't it!

 

^^HAHA your response reminds me of the "Bushism", "That makes sense to me, doesn't it?" LOL

 

Nice bump with the new turbo. Always good to have a big bump in the midrange like that.

 

Why must you do this to me Dave? My pockets aren't that deep.