Evo9 turbo vs BBK Full (journal)
Like my last turbo it seems laggy compared to evo9 stock turbo
I swapped back the stock 9 and gained 500rpm+ in spool.
The top end isn't even near...but daily from 2000-5000 is in fact more fun.
I guess the GtII 7460r is the best of both worlds.
I swapped back the stock 9 and gained 500rpm+ in spool.
The top end isn't even near...but daily from 2000-5000 is in fact more fun.
I guess the GtII 7460r is the best of both worlds.
Thread Starter
Joined: Jun 2003
Posts: 2,202
Likes: 20
From: Orlando, FL
Pretty similar in spool and a good amount of power. Only 24psi as well. At the same boost level you knocked off 0.32 from the 4000-7000 range. Looks like you definitely will be faster at the Drag Strip 
Nice comparison man. That is some good testing.
Would like to see what gains you see whenever you turn up the "wick"
Nice comparison man. That is some good testing.
Would like to see what gains you see whenever you turn up the "wick"
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. .25s sounds like a lot for autocross, but in 2nd gear, it's considerably less, but then again, I have lost by hundredths of a second before, lol.
Is it worth it to buy this turbo? I'm thinking about getting it but my friend made 415 wheel on e85 with a stock ix turbo. Then I saw a forum on here where someone was making 437 wheel with a BBK full on e85. When I saw that it didn't see like it was worth it. Do you think it is?
Basically, 25whp peak difference is not much, but at 7500rpm its more like 65whp
If you can do e85, its worth it. If not, this is the route to go IMHO Exactly.
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 
.
.This data is amazing. If everyone did this level of comparisons (and published them) the world would be a better place. Great great data, thank you for sharing!
Pretty similar in spool and a good amount of power. Only 24psi as well. At the same boost level you knocked off 0.32 from the 4000-7000 range. Looks like you definitely will be faster at the Drag Strip
Nice comparison man. That is some good testing.
Would like to see what gains you see whenever you turn up the "wick"
Nice comparison man. That is some good testing.
Would like to see what gains you see whenever you turn up the "wick"
Thread Starter
Joined: Jun 2003
Posts: 2,202
Likes: 20
From: Orlando, FL
. Torque didn't proportionally go up, but it's cool to throw the initial guesses on what affects what, and to see how close the results are to it.
Thread Starter
Joined: Jun 2003
Posts: 2,202
Likes: 20
From: Orlando, FL
delete, chart didn't scale properly with rpm (anyone good with excel and knows how to overlay graphs correctly?)
Last edited by Thoe99; May 30, 2011 at 10:28 AM.
Thread Starter
Joined: Jun 2003
Posts: 2,202
Likes: 20
From: Orlando, FL
Alright, got the charts to work. This is a boost and airflow comparison between the two turbos. So I guess the 325rpm peak boost lag that the other chart reports is not very relevant. In this graph, it shows boost only lagging by about 150rpms. This is great because it reinforces the idea that peak numbers do not always tell the whole story.
Evolved Member
Joined: Feb 2010
Posts: 1,630
Likes: 4
From: Columbia, MD
Excellent work on the comparison. Pretty much exactly what I expected... and the best thing is you have plenty of room to grow. Because the efficiency range of the BBK will scale even more efficiently with higher boost than the IX turbo, it starts picking up a lot with a couple more psi thrown at it.
Thread Starter
Joined: Jun 2003
Posts: 2,202
Likes: 20
From: Orlando, FL
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