We received the new HTA3076 last week from FP. I got the car strapped to the dyno this morning for testing. The testing was performed on my EVO RS.

The fuel map needed a lot of extra fuel added under 4500 rpm and I could feel the car move through the RPM band quicker than the HTA35r had been. Up top the car needed less fuel.

I left the timing curve the same the knock counts did go up with the smaller turbine wheel but nothing dangerous and still far from the knock threshold I had set up.

The first few runs were done at only 22 psi to see what kind of power it would make at low boost levels. Here is the dyno chart from that:



This is exceptional power from a "smaller" turbo at 22 psi. 484 whp and 370 ft lbs is more than I could possibly make at this boost level from a stock turbo or green.

I then flipped the switch on the dual stage controller to bring the boost up to 31.50 psi.

The power went up to 504 whp and 462 ft lbs. The power curve is better with this HTA3076 turbo than the 3065, which is a very popular turbo. Jarrod's car made 505 whp and 407 ft lbs on the 3065.

I printed the dyno sheet below to compare my car with the HTA35r and the HTA3076. The HTA35r sheet is with 33 psi of peak boost, the HTA3076 is with 31.5 psi peak boost. It gives you a really good idea in the difference between the two turbos. Both are in .82 housings. Personally, if I was shopping for a turbo not as big as the HTA35r, I'd use this HTA3076 but put it into a .63 housing which would give it even better low end. This would be the reason you would shop for a 3076 instead of the 35r anyway.

This test gives me all the information needed to determine how it is going to perform on different octane, at higher boost etc.

Bottom line is this is a winner for someone who wants more low end than the 35r and still good top end power.

Here's the dyno sheet for comparison:



To further break down this chart, just on the low end, to show how substantial it is, here is a little chart:

HTA35r TQ/HP HTA3076 TQ/HP GAIN/LOSS w/HTA3076
3,000 101/58 103/59 +2/+1
3,500 136/91 146/98 +10/+7
4,000 179/137 201/154 +22/+17
4,500 248/214 300/260 +52/+46
4,800 322/298 380/352 +58/+54
5,000 382/369 429/414 +47/+45
5,300 461/472 462/473 +1/+1
5,500 487/517 460/488 -27/-29
6,000 503/582 435/503 -68/79
6,500 483/605 410/512 -73/-93
7,000 461/621 386/519 -75/-102
7,800 409/612 334/499 -75/-113

This makes it easier to see the differences. As I said, down low the HTA3076turbo makes for some very nice increases, up top the HTA35r runs away from it.

BTW, we have 10 of these available right now for anyone intertested. The kit price on the cast manifold is $3395 and on the header is $4295.

Thank for reading.

 

Finally. You are the man. What RPM did it spool up at?

 

thanks for the new info dave. as always much appreciated

 

good stuff db

 

Wow looks like a awesome combo for the street!
Would love to see some track #s Dave to go with those awesome dyno #s

Nice work

 

Thanks for the test. How do you think the results would vary if you optimized the timing for each turbo and kept the knock level the same between the two? Less bottom end and more top end on the 3076?

 

Good stuff! I cant wait to get this kit from you guys in June(thats when I get some money back from the government). I will be so happy to add the Buschur turbo kit to my car! You will be getting a call from me in June.
BTW...I too was curious as to what RPM full spool was at???

 

WOW the 35 runs away from it hard:ekk

 

Excellent results, all these HTA options, wish they were available a while back I wouldn't have to buy yet another turbo. I am excited to see the HTA "37R"!

With that said I hope a HTA42R definitely surfaces as I've been eyeballing a 42R setup for a little over a year now.

Thanks for the results David!

 

No kidding! it doesn't appear to me the power under the curve is nearly worth the loss up top. I'd say the 35 still owns.

 

Was this on the cast manifold or header? Same question with the graph of the 35r

 

David are you going to be testing this on a normal evo too? I would love to see what it does on a bolt on car. Seeing the results my goal of 430whp on pump should be obtainable.

 

Dave, that is great. If you put that HTA35r on a 2.3 (same exact mods) do you still think the hta3076 would have the advantage under 5,300rpm?

 

Was the turbo dynoed on pump gas or race gas?

 

+1 to that!