I understand the basics of turbos.
My question is the differences between all of them.
It seems about everyone is using Garrets.
I think Nigel and Hal have tried a couple different setups.
The main theme I understand is:
smaller turbo = faster spool time, but less max PSI
bigger turbo = longer spool time, but higher max psi

I am sure I have the spool times things correct, but beyond that I am guessing.

Anyone care to go over the various models available? is there a new model out now? So far which appear to be the best choice? Is there any good sites on the DIFFERENCEs of turbos and not just "How it works" ?

what about the ball bearings?

what is best for durabilty? what the shortset expected life of a turbo? are there any warranties?

what turbos has everyone tried/considered? Why did you change and how it the change? Exspecially Nigel, Hal, and Tom please share :>

Anymore info you think would be beneficial to this thread, please share.

Thank you

 

You are right about the spooling...but you have to understand they make models like hybrid, or ball baring.... ballbaring makes it spool up much faster....so say u have a T04 if its a Ballbaring turbo it will spool alot faster ....but these are ALOT of money

here is a link of all the diffrent turbos

http://www.turboneticsinc.com/

 

no. size of turbo is not what gives highest psi. a t3 will run to 25psi just as a t60 will. the spool and then actual flow, 6psi of t25 boost will yield far less gains than 6psi of t60 boost.

I have tried a slew of turbo's , and it all depends on what you want it for. for track, for impressive dyno only, for fun daily driving where you see boost often without downshifting etc (what i prefer) or anything else, you can get a turbo to match what you need...and one that will do all of the things you want... a somewhat larger turbo, but only in a ball-bearing form is a good idea, but check prices on ball-bearing, almost double a turbo cost.

then you have piping designs too, thats another day.

 

ive been talking to a guy who said i should do a ball bearing t4 like all the kits for the newer maxes and he said it would be 1200$ but i could buy a non ball bearing t4 like this http://cgi.ebay.com/ebaymotors/ws/eB...ategory=33742i for a 1/4th of the cost is it really worth the extra money

 

I looked at your turbo link on ebay , and it looks clean...ask the seller for sure if there isent any shaft play, ask how many miles, ask the condition, and ask if any of the blades are bend... pics dont tell everything, u wanna be very carful on ebay becuase they dont have returns.. but since your just starting with a custom kit, id go with the ebay one, so u learn about it, and get good with turbos, and then later like harold did and everyone els...u can play around with it and switch out your turbos.

Me i went with a T04 like that one you showed us, off if ebay also, i havent got it yet to see the real condition , but the only reason i bought it was becuase the guy selling it said i have 30 says to see if i want it , if not he will refund me....so im going to test it and probly take it to a turbo shop...

Good luck with everything

 

.96 A/R is too big. It will take you forever to spool.

 

Damn i never asked the guy what the A/R on my turbo was....shiiiiit hope its the right size

 

If you really want to learn this is where it's at ----> Maximum Boost

I'm currently reading the book and it really is good. Having taken physics and such makes me really interested in WHY not just "what do you suggest" (not that we don't have knowledgable users here).
-hype

 

 

Is .96 really too big?

 

I hit peak boost at about 3400 with the ball-bearing turbo and .81 A/R. Imagine how long you will have to wait with a .96 A/R non ball-bearing turbo... probably ~4300 to reach peak boost.

 

Damn that sucks , might as well get a superC

hope mine is the right size

 

Let the flames begin.

Hope so.

 

most if not all ball bearing turbos are non rebuildable but ball bearing turbos are suppose to last longer then non ball bearing ones.

big or small turbo, it can still put out 10psi, 15psi, but 10psi on small turbo is less airflow then 10psi on a big turbo. hope that makes sense.

 

I wonder why that is. Don't the non-ball bearing turbos have hydrodynamic sleeve type bearings? Those can last forever as long as they have an adequate oil supply and you don't coke them up with excessive heat.

 

so what do you think would be the idael A/R, is .81 good or should it be smaller like this one http://cgi.ebay.com/ebaymotors/ws/eB...category=33742 since its non ball bearing

 

It all depends how quickly you want power to come. I chose .81 A/R because I like high end power and CFM. .69 A/R is good but then again, my good will be different than your good.