The Garrett site has always been one of my favorite resources for understanding turbos. I checked out tonight and much to my surprise, they've updated the whole thing.

http://www.turbobygarrett.com/turbobygarrett/tech_center/turbo_tech101.html

I've only skimmed a couple paragraphs, but it looks like this site could offer a good hour or two of enlightenment, if you were interested. From how a turbo works to maximum allowable compression ratio under maximum load, this site has pretty much all you need to know about turbos in general.

Enjoy.

Good read. Very informative.

That blue car got me boobies once

YES ! new stuff to learn about !

Quit your job
Sell your car
Get on a plane
Surf and party
Fall in love
Never come back...

Comparing some very popular Garrett turbo compressor maps to those of a Holset HX30 and HX35 ... since this is as good a thread as any.





HX30

HY35/HX35 (Stock Dodge Cummins turbodiesel turbo 94-present, HY on the automatics 2001 and up)


Both have standard T3 inlets. HY35 is a single scroll roughly 9cm^2 turbine, HX35 is a dual scroll divided inlet T3 roughly 10cm^2. With a pulse header, turbo dodge guys on ancient cylinder heads with 2.3 liters of displacement can spool a HX35 by 3300rpm. Both have 4" inlet and the big 2.5" outlet that is on the GT42R and other gigantic turbos. Both typically have internal wastegates, but the stock actuators are set to just under 30psi. Both end with industry standard V-band discharges, usually 3", some have an elbow that ends in a V-band (usually HY35s do) some do not. Both flow as well or better then comparable Garrett GT turbos, but cost less then half as much in many cases and even less when you include the money saved for having the factory V-band outlet and included internal wastegate assembly.

In summary: Holset turbos kick ass.

edit: don't mean to hijack or anything brian. but IMO we should totally load this thread up on anything turbo related.

1995 Eagle Talon ESi

yea good ifo i read it a while ago

LED tails : Done for now!
99 eclipse rst
cobalt blue met. paint,star stage 2 upgraded t3/t460trim turbo ceramic coated , polished compressor housing, ,optima yellow top, chrome i/c piping ,front mount ntercooler ,apexi turbo timer . zeitronix wb02 ,faze oil ,boost gauge,egt ,bosch 4x plugs,kyb agx struts, pro kit springs.17''adr venomous rims,Falken azenis ,brembo dilled/slotted rotors ,turbo xs bov ,oil catch can,manual shiftknob,autometer pyrometer egt , vortech sfmu,b&m fuel pressure gauge ,accel 310cc injectors ,gasketmatched and polished intake manifold ,58mm throttle body ,no egr,polished turbonetics wastegate,fuel pump rewire,homade fcd and a lot more .LED reverse lights ,sidemarkers and tails .atx to mtx swap . South bend tz clutch . Tons more
http://imageshack.us>


http://www.2gnt.com/index.php?d=boosted60trimrst
My contribution to the wiki
http://www.2gnt.com/index.php?d=crank%20arm%20spindle%20mod%20to%20fit%20power%20panels

Here is a helpful link to flow and horsepower ratings for common dsm turbos. There is also a link on this site to a directory of compressor maps. I hope this helps granted it is a few years old.

http://devnulled.com/content/2004/01/flow-and-hp-ratings-for-popular-dsm-turbos/

Gabe

Here is the site with all of the compressor maps... Some even have turbine maps too.

http://not2fast.wryday.com/turbo/maps/

-Chris
1999 Eclipse T-GS


2.4 Project is Officially underway

http://not2fast.wryday.com/turbo/glossary/turbo_calc.shtml

Very useful calculator for giving you a very good idea of what sort of turbo to look for.

1995 Eagle Talon ESi

Pfff use the search button, I posted that a few months back. Just messin though, it sure is good info for starters

Neat article but it looks like it managed to escape the grasp of a spell checker.

_______

BPU'd skittle