T63 v Stock

[HellOnWheels]

I doubt that it is but...Is the volume of boosted air, say 15#'s, the same when comparing a T63 to a stock turbo? If not how can it be measured other than a gazillion dollar tool? seat of the pants??

Also, it seems to me that turbos would be more understood by the hipo group if turbochargers were rated by CFM rather than a concoction of letters and numbers, ie T63, T45, T44, etc...I have a T63 but have no idea what its CFM flow is.

I realize that posting the CFM's would be dependent on several factors-but so is it for carbureators.

HellOnWheels

 

[Brian Mc]

I agree, I don't understand how upgrading to a larger turbo would help when it builds 17# to the redline with a stock turbo. Can anyone explain this?

 

[DCVING 6]

This was explained to the Chicagoland and Indiana bunch at a tech session last year at PTE. Don't quote me on what he said. I know I am probably a bit off. (I had just gotten my car and got confused very quickly when it got technical. )

Basically you shouldn't be looking at the intake pressure, but the exhaust side. Depending on your combo, you need to find the turbo that exhausts a certian range of air. Needs to the most efficient.
I'm sure someone else can step in where I left off, or correct what I told you. Best bet is to call Harry at PTE.

 

[turbodave231]

One of the factors that you need to consider it the amount of heat a turbo puts into the intake air. A small turbo can move a given amount of air but raises the temp X degrees F. A larger turbo will move the same amount of air with less pressure and a smaller rise in temp.

PV=nRT

Power output is all about air density. The colder the air, The less likely you are to encounter detonation. The denser the air, The more power you will make.

DR

 

[Chris Taylor]

A T63E flows around 970 cfm. This turbo is about the same as a TE45.

 

[Intercooler]

GNTTYPE.ORG has all the CFM flows and max HP levels with the turbos besides giving sizes and stall suggestions. Very helpfull!

 

[YGETV8]

So, in a nutshell from above input (and in layman's terms, because that is what I am when it come to this!), the 15 psi is a reading of air "backed-up" in the manifold. So 15 psi is 15 psi whether it be a stock turbo or a TE63. BUT, a bigger turbo will have a denser air charge at the same level of boost due to less heat since it doesn't have to "work as hard" to produce the same level of boost. Also, the exhaust side of the bigger turbo will be more efficient and will influence the horsepower output, even at the same boost levels. Now, the real reason you would want a bigger turbo is to be able to run more boost more efficiently, right?!

 

[azgn]

Boost = restriction

with the same heads, exhaust, etc, a bigger turbo will make more power at the same boost level because of its efficiency

bigger turbos work best when the "restriction" is less and the flow is higher...in that case, much more power is made at a given boost level (stock vs bigger)

on a very efficient engine (say, Stage II heads) a stock turbo probably couldn't make much boost at all.....it would all flow