trims??

1988gte · 11-13-2005, 05:53 AM

Im just wondering, can anybody tell me about turbos and there trims? Also on another note just genreal info on turbos (stock, non stock, upgrade) that will work for our cars (7mgte) I looked up info in the forums but I just want to learn more

joel w · 11-13-2005, 07:21 AM

here are some of the lingo definitions. http://www.turboneticsinc.com/glossary.htm

and some good all round turbo info...
http://www.turboneticsinc.com/faq.htm#turbosizing

dont believe what she says, size does matter..

1988gte · 11-14-2005, 06:34 AM

very intersting. helps me alot. Turbos are different to me. Always have had v-8's "american power" the supra is FUN i love it

joel w · 11-14-2005, 06:47 AM

trim by the way...
i think trim is just the size of the intake wheel diameter? mine was upgraded to 50 trim and the housing was machined to fit the larger wheel..and nothing was done to the exhaust side. i guess the exhaust side mods are not needed untill higher boost levels. 50 trim is good to about 400 hp or 15psi (the sweet spot of the turbo) where it runs most efficiently....bigger hp motors need more air and or lager wheel to flow more air..

1988gte · 11-15-2005, 05:41 AM

is 400 to the ground or flywheel?

joel w · 11-15-2005, 05:51 AM

probably flywheel.. but not sure..

joel w · 12-05-2005, 10:22 PM

dcrusupra, im not sure how big they can go , sorry.

Quote:

Originally Posted by joel williams

trim by the way...
i think trim is just the size of the intake wheel diameter? mine was upgraded to 50 trim and the housing was machined to fit the larger wheel..and nothing was done to the exhaust side. i guess the exhaust side mods are not needed untill higher boost levels. 50 trim is good to about 400 hp or 15psi (the sweet spot of the turbo) where it runs most efficiently....bigger hp motors need more air and or lager wheel to flow more air..

hate quoting myself, but i posted bad info...

i just found out that trim is just the ratio of the two diameters of the compressor wheel. EXDUCER (big diam.) and INDUCER (small diam) ...trim is how much bite the blades have not the size of the wheel.. to help clearify..

stock ct26 is a 49 trim with 1.75(in) and 2.5 (ex) compressor wheel.
My upgrade is a 50 trim,with 2.25(in) and 3" (ex) compressor wheel. the ratio of the (ex) and (in) is almost the same but the wheel is overalll 1/2 inch bigger than stock diameter..... these measuremeants are not exact but rounded up or down..
ok... sum it up again, a 60. trim on a 3" wheel will grab much more air than say a 45. trim on a same 3" wheel due to the shape of the blades, not the size of the wheel.. but at the same time the 45. trim will spool much faster than the 60. trim its all very complex and mathmatical.. im still learning..

but remember the size and shape of the exhaust side wheel will also make a difference in spool time and flow and power..

hope this help..

1988gte · 12-06-2005, 05:40 AM

great info, i have always wondered about the trim stuff. make lots of sense now

11-13-2005, 05:53 AM	#1
1988gte 3" Exhaust Join Date: Jul 2005 Location: Lubbock Texas Posts: 140	trims?? Im just wondering, can anybody tell me about turbos and there trims? Also on another note just genreal info on turbos (stock, non stock, upgrade) that will work for our cars (7mgte) I looked up info in the forums but I just want to learn more

11-13-2005, 07:21 AM	#2
joel w Lexus & 550's Join Date: Aug 2005 Location: In the shadows Posts: 506	turbos.. here are some of the lingo definitions. http://www.turboneticsinc.com/glossary.htm and some good all round turbo info... http://www.turboneticsinc.com/faq.htm#turbosizing dont believe what she says, size does matter..

11-14-2005, 06:34 AM	#3
1988gte 3" Exhaust Join Date: Jul 2005 Location: Lubbock Texas Posts: 140	very intersting. helps me alot. Turbos are different to me. Always have had v-8's "american power" the supra is FUN i love it

11-14-2005, 06:47 AM	#4
joel w Lexus & 550's Join Date: Aug 2005 Location: In the shadows Posts: 506	trim by the way... i think trim is just the size of the intake wheel diameter? mine was upgraded to 50 trim and the housing was machined to fit the larger wheel..and nothing was done to the exhaust side. i guess the exhaust side mods are not needed untill higher boost levels. 50 trim is good to about 400 hp or 15psi (the sweet spot of the turbo) where it runs most efficiently....bigger hp motors need more air and or lager wheel to flow more air..

11-15-2005, 05:41 AM	#5
1988gte 3" Exhaust Join Date: Jul 2005 Location: Lubbock Texas Posts: 140	is 400 to the ground or flywheel?

11-15-2005, 05:51 AM	#6
joel w Lexus & 550's Join Date: Aug 2005 Location: In the shadows Posts: 506	probably flywheel.. but not sure..

12-06-2005, 05:40 AM	#8
1988gte 3" Exhaust Join Date: Jul 2005 Location: Lubbock Texas Posts: 140	great info, i have always wondered about the trim stuff. make lots of sense now