XLR8R

Why don't we gather our empirical data together about the various OEM & aftermarket turbochargers into a pool of information we can use to predict/choose which one would serve an individual CTD's needs best?

Compressor maps are great, but apparently in short supply... since the math that defines A/Rs and trims is pretty straightforward, we need you guys to post up the measurements required to plug into the formulas.

These 8 values are what's most important:

For wheel trims - compressor inducer diameter, compressor exducer diameter, turbine inducer diameter, turbine exducer diameter (inducer size is the diameter of the wheel's blades at it's inlet, exducer size is the diameter of the wheel's blades at it's exit)

For housing A/R - compressor discharge area, turbine inlet area and the average distance from the center of the turbo shaft to the perimeter of both the compressor inlet and (separate measurement) turbine discharge.

Vernier caliper-generated numbers are probably easiest, otherwise 32nds of an inch are good enough for most comparisons - check twice and don't worry about sticking to SAE for simplicity's sake - everything ought to be converted to metric anyhow for easy comparison to manufacturer's specs.

Some of the measurements can be tricky to obtain, so post up if you're not sure how!

cquestad

Great idea...I wish I heard BEFORE I reassemled my A5k, HT 64/13ss, and HT S-400.

I hope to help soon...

bluechrome

Well I can't help you guys but that is a great idea. But I am about to buy a turb from htt and was thinking that the 64-13ss is the one I want have heard great things just needing some insight. I also plan on getting an mp-8 and some flux 1's

XLR8R

bumpity bump

soulezoo

Yeah-- I would be really interested in seeing results from this too; if nothing else to help make a more informed decision. There seems to be a lack of definable information regarding comparing turbos and their performance even from within a same manufacturer. All we seem to get is something like "supports X hp to Y hp". What does that mean? The best I have seen for the average layman is for ATS where it shows CFM flow and a comparison for spool time to the stock turbo. That I can understand to a degree even more than compressor tip size and etc. I would certainly like something definitive on aftermarket intercoolers too... It all helps in making an informed decision on what are very expensive parts!!

ptgarcia

How about putting a spreadsheet together with blanks to fill in so nobody forgets a key measurement and has to disassemble everything again. Maybe put some illustrations on it to show where each measurement should be taken? Then post it here for everyone to download and fill out.

XLR8R

That's a good idea - I'm sure I could figure out how to do that, IT-wise... I'll put it on the to-do list!

Meanwhile, if anyone has the time & inclination - feel free to post up and help with this community project.

Speed Shift

That is a good idea!

How about doing something like that for modules and programmers also?

Like....


_

Smarty//Programmer//Timming, Duration SW#s 1,3,5,7,9// or Duration only 2,4,6,8

Edge EZ//Module// Pressure only

TST R49//Module// Adjustable Timming, Duration, Pressure.



Somthing like this would be cool for a quick reference for stacking ability...

cquestad

You mean you don't have all of the programmers/boxes memorized yet? Come on...lets play trivia!

Speed Shift

ha ha yeah I have most of them memorized, but I am thinking about the new guys who ask questions like...."What programmer can I stack with a Smarty chip?"

It would be a great way to get important info fast.

StrokeThisCTD

If someone ( i would even consider it ) decides to make a spreadsheet on boxes, a column for Company, module from that company, HP ratings, timing/duration/pressure selection, and a "Stacks well with" column would be cool. Also price.