HTA 3586 don't really KICK until hit +28psi??
 

Is it true????

So what do you mean by "kick in"? I mean its not like nitrous. As with any turbo the more boost you make it push the harder its gonna pull and typically larger frame turbos wont wake up until later rpm's and it takes more airflow to get them there.
I have never used/seen this turbo in action but 28psi seems maybe a bit late but not by much.
-Edwin

probably not, turbo performance is more rpm dependent than psi dependent, that turbo will start to 'kick' when it spools up probably around 4500+ rpm on the stock 2.0l.

I'm not talking about spooling, full boost...etc
I means those turbos really wake up at +28psi

is that true?

hahaahahha you guys are dicks! lol

I just built a 2.1 with an air to water setup on it and i got it to spool at nearly 3800-4200. The car made 20psi by that time and made over 400whp on a terribly conservative tune. Then the boost got turned up to 27psi and made that by 4500 and she made 530whp...this is on 91 pump also and during tuning. the 27psi felt better and stronger than the 20psi of course but just look at the numbers between 20psi and 27psi. That tells you the turbo is going into its efficiency range and is making more power per boost than at 20psi. Once we get up to 35 psi, things will get far more fun. I believe HTA86's like mid to high 30's and 40's as far as boost goes so at only 28psi, its just beginning to "wake up".

I really appreciate it!
Thanks man

Currently have a HTA 86 and conservatively speaking. It begins to spool around 38 to 42 hundred rpm with a 2.3l. Now on a 2.0l it may be around 500 rpm later. Either way you should be full boost around 4500 rpm. Hopefully that answered any questions you still may have.

I think what people mean, is that for every PSI you should see about 10whp/10tq. Once you start passing 28psi you can see 20-30whp/tq per PSI. I saw this on my 88hta.

I.have also heard the same thing.. Bought my 3586 turbo before my engine... Long story short... I went 2.3 10:1 cr on 94 oct and all the companies i called for a tune said they would not tune past 23 psi.... My major concern too was that the turbo has not yet come alive at that psi level... I figure i would be leaving alot on the table... Pretty disapointing until i found one tuner that is actually able to tune cars without a problem =) definently think and believe that bigger turbos need more psi to more efficiently make power when compared to smaller turbos

No. They will make stupid power at really low boost.

Boost pressure has nothing to do with the turbo's ability to make power. A turbo is an air pump plain and simple, you put the same turbo on a large displacement motor you can run half the boost and make the same power because it's more efficient at ingesting air. Boost is a measurement of how hard the turbo has to work to FORCE air into your engine and is more a factor of the resistance of your motor than the efficiency of the turbo.

So the idea that a certain turbo doesn't wake up till "X amount of boost" is completely wrong. This will vary from mod to mod and motor to motor, if you're not seeing this turbo create power till 28PSI it means your motor is not effective in ingesting the air the turbo is working hard to generate. That being said even a smaller turbo would have to work harder to reach it's target air flow as well.

These are both 23psi though the one isnt labeled. My stock 2.0 with S2s and a 3586 vs my 2.4 with R2s and a 3586 (pumpgas)-

http://img.photobucket.com/albums/v5...t23psipump.jpg

It only matters how efficient the rest of the combination is as far as how much power it will make.

You're mistaking air flow for pressure the general rule of thumb is that for every pound of air the motor can ingest equals 10HP.

Boost pressure determines how hard the turbo has to work to forced X amount of air into your motor.

Boost pressure is the worst possible way to measure the efficiency of a turbo air flow and shaft speed are the best ways but the vast majority of people are not willing to spend the money to setup their car to monitor these variables properly.

Great example of what I was talking about earlier. Increased displacement and larger cams allowed for more air to be ingested at the same boost pressure.