Originally Posted by Thoe99

Once you get to this level of power, the numbers are not as close to each other anymore, run after run (like you guys said, probably heat soak from intercooler). Throughout the day tuning, I was getting anywhere between 365-385 peak hp. It's awesome that the peak was always after redline. Who knows what will happen if I keep going to 8-9000rpm (if I had the hardware to do so). Anyways, it's all dialed in for 24psi now. It's hitting 5-6 degrees peak torque, 13 at redline. I'll pull 5 logs this weekend and get averages.

Btw, CRBD was just about dead on when he told me to expect about 150rpms is added lag over the 9 turbo, which in my test cases have translated into a quarter of a second lost going from 2500-4000rpms. I like to benchmark that range because it's used quite often in autocross.

Here's my strongest pull of no knock for today...378hp / 336tq
That's roughly +50/+10tq for a simple turbo swap!



I ordered some MilSpec throttle body seals so I can fix that boost leak and potentially make more power, preferably earlier. I think this is contributing to my lag that I see in comparison to other people's graphs. My peak torque seems to be hitting a few hundred rpms later than a lot of other graphs I see on the board.

I think that leak is getting worse, but for testing purposes, all things have to be equal, so if it was leaking when I had the 9 turbo, it'll be leaking for the BBK Full's averages.

Originally Posted by thatguysmells

Sorry, what kind of gas was this run made on?

Originally Posted by Thoe99

93 octane. I'm still on the same tank of gas that I benchmarked the evo9 turbo on too

Originally Posted by thatguysmells

Got it. Man, that's pretty good. For reference, my friend has a stroker motor with a ATP gt30r turbo, cams, all the supporting mods on 91 octane he made 350 wheel horsepower on a low reading dyno. The tuner said his dyno reads lower than a mustang dyno. So, I guess the BBK is better in that it would spool way earlier than my friends turbo and it's cheaper. Would the gt30 take it on top though?

Originally Posted by Thoe99

We'll never know unless we both race each other.

The beauty of my testing is that I'm benchmarking not only dyno graph numbers, but real world stats, such as the time it takes to go through 2500-4000rpm and 4000-7000rpms. These numbers take the driver skill completely out of it, so as to show results that only the car itself is making. I already see great improvements from the time it takes to wind through those rpm segments, versus the 9 turbo.

And since this is all conducted by one person, using the same standards in the same environment, with the same charts, it is about as perfect of a comparison as you can get. Yes...I also subtract weight from the dyno graph settings as I consume gas .

Originally Posted by Thoe99

I'm still testing to figure that out myself. I don't value high hp as much as a lot of the other guys here do, since my main purpose is autocrossing--I tend to value the area under the curve more so. So until I get back out on the tracks to see how things perform, I don't wanna conclude my thoughts on value yet. Also, I don't plan on stopping at 24psi

Do you have E85 available in your area? I only have one station in my city and it's not convenient for me to go there, so E85 was out of the question for me. If it was readily available, I definitely would have stuck with the evo9 turbo--that turbo has been great to me.

If you drag race a lot, I'd at least consider the BBK Full. The 9 turbo doesn't hold boost at redline nearly as well as this one, and that makes the power suffer top end. On the BBK, I run 24, tapering to 21.5. With the evo9 turbo, I ran 24 tapering to 19. Since the BBK holds boost better, look how much torque I get, which translates into more power. Here's a pic comparing the two.

Originally Posted by thatguysmells

Thank you for your insight and responses. I'm curious, what about the butt dyno? Does the BBK 'feel' better up top? The car I was talking about, my friends on stock ix turbo running e85, even with cossie m2 cams his car falls off hard on top and it's definitely noticeable. It would be nice to have a turbo that would keep on pulling so the BBK could be a win in that department alone.

Originally Posted by Thoe99

It's funny you mentioned this. Throughout the day, as I was conducting runs and tests, I failed to pay attention to the butt dyno, and only paid attention to the road, my tach and my knock light. So at the end of the day I just drove around, feeling the car out. 1st gear was useless (it went through in like 30ft), 2nd gear planted my head back to the seat til redline, and 3rd just pulls hard way past redline. The power is amazing, but the power after peak torque kept pulling and pulling. It's definitely noticeable over the evo9 turbo .

Originally Posted by thatguysmells

Very nice! Thank you again! I'm considering picking one up for myself. I wonder how it'd do with a stroker or built motor...

Originally Posted by Thoe99

No problem. Which aftermarket motor are you thinking about?

Originally Posted by thatguysmells

I was just planning on building it myself using Buschur parts. I think they use Manley rods, JE or Manley pistons, new bearings, ARP hardware, and probably have the machine shop clean up the cylinder walls.

Originally Posted by Thoe99

Nice. You might do better with the BBK-B turbo if you're going with a bigger engine. Search it up, it's bigger than the Full. I've been eyeballing Buschur's 2.3RPM for a while now