New stock frame turbo options from Blouch
Turbo doesn't flow enough out the top. 2.3's need a lot of air. The powerband looks very similar to a stock 9 turbo on 2.0L, just more power and torque..
Agreed, these stock frame turbos are all gonna suffer from back pressure issues in the upper rpms. Just the nature of the game when you're trying to get that much mid range torque and the response we all want. Its also why Evos have boost taper but DSMs were more likely to have boost creep issues.
If these dyno's were scaled back to make just 400ftlbs they would have a real nice and wide power band keeping over 300ftlbs for 3500-4000 rpms.
If these dyno's were scaled back to make just 400ftlbs they would have a real nice and wide power band keeping over 300ftlbs for 3500-4000 rpms.
I think you are more limited by the compressor map than by your intake. There are plenty of high hp Evos running the stock MAF out there. An O2 dump might be worth considering if you can stand the noise.
you guys are being overly critical of the power falling up top. I have driven tens of thousands of miles on similar power bands. hits hard, tons of part throttle torque. fast without having to rev high. all great characteristics of of fun street car.
Your result on XTR 1.0 Blouch, which is equivalent to CBRD BBK-Full, is right in line and nice work.
From personal experience, from 2.0 to 2.3 you gain torque, not power on top!
Remember that.
Also I bet that the turbo will surge, and be annoying- even BBK-B will be "annoying" how rapidly it spools on the bottom. Speaking from experience.
Perhaps XTR 2.0 would have been much better match? Especially if its exh housing is a bit larger than BBK-B was? I don't know if it is.
Regarding SD:
OEM MAF hates CAI - Cold Air Intake pipes. Injen, AEM, they are all terrible with the OEM MAF.
Some type of resonant tuning characteristic of OEM Intake is disturbed and results in idle issues, etc.
With MIVEC that is possible to control better, but you run an Evo 8, so your idle is tricky to sort.
Since these turbos have same diameter intake as the OEM: Put back the OEM hose intake- and I bet that even without tuning your idle will improve.
There is no power to be gained in a piece of pipe there.
Regarding SD without MAF...frankly...doubt you'll see an honest 5whp gain, OEM MAF is not restrictive up until 600whp or so on the RRE Dynopak.
But they have to tell you something..so they told you something...they know their stuff, and the only way they can show gains is to tune to make gains...you can always do a Dyno Queen tune- show customer a dyno sheet so he is happy, than send him home with safer tune so that he does not return with complaint.
I would do SD on Evo 8, to sort idle!
But I would now before SD try the Stock Intake Pipe..and I bet idle would be nice.
SD does not gain 30whp on stock frame turbo..for engineers...it does on paper..and paper will hold any claim.
From personal experience, from 2.0 to 2.3 you gain torque, not power on top!
Remember that.
Also I bet that the turbo will surge, and be annoying- even BBK-B will be "annoying" how rapidly it spools on the bottom. Speaking from experience.
Perhaps XTR 2.0 would have been much better match? Especially if its exh housing is a bit larger than BBK-B was? I don't know if it is.
Regarding SD:
OEM MAF hates CAI - Cold Air Intake pipes. Injen, AEM, they are all terrible with the OEM MAF.
Some type of resonant tuning characteristic of OEM Intake is disturbed and results in idle issues, etc.
With MIVEC that is possible to control better, but you run an Evo 8, so your idle is tricky to sort.
Since these turbos have same diameter intake as the OEM: Put back the OEM hose intake- and I bet that even without tuning your idle will improve.
There is no power to be gained in a piece of pipe there.
Regarding SD without MAF...frankly...doubt you'll see an honest 5whp gain, OEM MAF is not restrictive up until 600whp or so on the RRE Dynopak.
But they have to tell you something..so they told you something...they know their stuff, and the only way they can show gains is to tune to make gains...you can always do a Dyno Queen tune- show customer a dyno sheet so he is happy, than send him home with safer tune so that he does not return with complaint.
I would do SD on Evo 8, to sort idle!
But I would now before SD try the Stock Intake Pipe..and I bet idle would be nice.
SD does not gain 30whp on stock frame turbo..for engineers...it does on paper..and paper will hold any claim.
Kaj
Yes..that is what I am saying.
The 2.3 will make that power at 6000-6500 that 2.0 will make at 7200-7300rpm.
Now, there may be variations, but nothing significant- on stock frame turbo
On large frame turbo...that may change..because you can over-cam 2.3 a bit more without hit in bottom end torque, and make more on top..
But we are talking stock frame, so gains are off idle immense torque gain to 3000rpm, and than beyond that the feel slowly converges somewhere north of 6000rpm...to where 2.3 may feel like 2.0 on top.
If your 2.0 is good...do not touch it.
Stupid to do, trust me.
Only if you want to go to large frame turbo and its a decision that will cost always more than you anticipated if done well.
Yes..that is what I am saying.
The 2.3 will make that power at 6000-6500 that 2.0 will make at 7200-7300rpm.
Now, there may be variations, but nothing significant- on stock frame turbo
On large frame turbo...that may change..because you can over-cam 2.3 a bit more without hit in bottom end torque, and make more on top..
But we are talking stock frame, so gains are off idle immense torque gain to 3000rpm, and than beyond that the feel slowly converges somewhere north of 6000rpm...to where 2.3 may feel like 2.0 on top.
If your 2.0 is good...do not touch it.
Stupid to do, trust me.
Only if you want to go to large frame turbo and its a decision that will cost always more than you anticipated if done well.