[zerepjd]

While surfing the web on all things STI I ran across the boost pressure, but I don't remember what it was. Does anybody happen to know? And what kind of turbo are the using? Ball-bearing....etc?

Thank you

<font size=-1>[ This Message was edited by: zerepjd on 2001-12-06 10:02 ]</font>

 

[JJ]

17.5PSi

I'm not sure on if it's a BB or sleeve-type. I think it is just a regular non-bb turbo.

JJ

 

[chawklit]

Could someone explain to me how ball bearings are used in turbos? Do they use them in the turbine or what, I don't understand.

 

[JJ]

Yes, that is exactly where they are used. In the turbine cartridge. BB turbos spool up alot faster than sleeve-type, but I've heard they do not last as long and are more fragile. (Repeat after me... TURBO TIMER). :smile:

One of the most popular upgrades for WRX's these days are BB IHI VF-22's and VF-23's.

I believe that the turbo on a STi (somebody correct me, casue I am wrong sometimes) is a non-bb VF-22.

JJ

 

[chawklit]

On the subject of popular upgrades here is an awesome site where they upgrade your turbo and many other things. Is this turbo a VF-23?
http://www.cobbtuning.com/aps-cobb/aps/rtspecincludes.html

 

[JJ]

I would think that maybe is a BB IHI VF-23..

 

[chawklit]

Since we were talking about turbochargers I was wondering what everyone thought of Turbo's vs. Superchargers and their pros and cons.

 

[araknyd]

Turbos (as opposed to superchargers) can be easily swapped out or upgraded. They are also more efficient. Besides that, they are more fun [my opinion only]. Superchargers are more popular on V8 or V6 cars, simply because twin turbos can get expensive.

As for ball bearing turbos, they spool faster, allowing you to upgrade to a higher-flowing (more powerful) turbo with the same spool-up characteristics of a smaller, non-ball bearing version. The only downside is the added cost.

_________________
http://raktron.com/spyder

<font size=-1>[ This Message was edited by: araknyd on 2001-12-29 01:15 ]</font>

 

[thermite]

If a supercharger isnt tuned just right i herd it can eat the rings off yer pistons kinda like nitrous would. Also if i remember correct on most cars you gotta have some performance engine parts and a well tuned ecu to go to a supercharger. Plus they cost alot :razz: Just my two pieces.

Glen

 

[araknyd]

Any forced induction (if tuned wrong) is potentially hazardous, especially for those guys who try to put turbo/supercharger kits on NA cars without rebuilding the motor first.

 

[chawklit]

What do you have to rebuild in the engine to put in a super or turbocharger? I don't understand this.

 

[thermite]

Well it depends. On a car like the WRX you wouldnt necessarily have to do this. The WRX already comes with upgraded engine parts compared to a non-turbo model. But it depends how fast you want to go. if you want to run 450HP out of your 2.0L WRX its gonna require some serious engine parts, peroformance camshaft, pistons, rods, rings etc in order to make it work effectively for a long period of time. The purpose of doing it is to ensure the engine has the strength for the added power, and also to make sure the engine has a decent/long life. I mean whats the point of Upgrading to alot of Ponys of the engine is gonna last 2K miles. Now on engines that do not come from the factory with a turbo it might be a good idea to upgrade some engine parts if yer gonna run a high HP turbo or especially a supercharger. Basically all im saying is if yer gonna put alot of mods on yer engine and get alot of ponys at least upgrade some engine components and make it last a while. Just my thoughts/experience on this subject.

 

[araknyd]

The main thing is the compression ratio. Cars with factory turbos have engines designed for turbocharging - the compression allows for high boost (non-turbo cars with turbo kits usually are forced to run 8 psi or less, which it no fun). A factory turbo car is also likely to have stronger internal engine parts, ignition system, and a fuel system more suited for boost. It's just a lot easier to upgrade a car that came with a turbo than to add one to a car that didn't.

 

[thermite]

Well said

 

[Bill]

Here is a pretty good basic site explaining about turbos:

http://www.howstuffworks.com/turbo.htm

Sport Compact Car just did a great series on them over the summer, too.

 

[thermite]

thats a neat site, good explanation but its always still a good idea for performance engine parts.

Glen

 

[chawklit]

That article was cool and so was that site. Are there any sites that go a bit more in-depth than that?

<font size=-1>[ This Message was edited by: chawklit on 2002-01-02 21:35 ]</font>

 

[Bill]

Dunno about web sites. I have a book at home called "Turbo and Supercharging" or something like that. Hard cover and about 150 pages. But it gets _really_ technical - it was written more towards engineers than "normal folk."

I'd really recommend that SCC series - see if they have back issues for sale. It was really well-written - easy to understand and provided all the detail you'd prolly want.

 

[chawklit]

Alright, I'll check it out thanx.

 

[chawklit]

Alright, I'll check it out thanx.