hello i just bought an extra turbo for my 89 FC its a garret something haha the specs are .50 AR coldside, 1.00 hotside, Twin scroll T4 flange, 4inch v-band not sure if its journal or ball bearing it may be an older model but i was just wondering what it is?

With these kind of specs when will i hit max boost on a street port? cuz i dont want to much lag but i am kind of suspecting some

Thank you

 

you need to take off the housings and give us the compressor and turbine wheel diameters, inducer and exducer

 

spool should be decent since its a divided scroll 1.0, you're not choking it on that end. does it have both coolant and oil lines for the chra? Could help determine if its ball bearing or not.

 

no its just oil
im worried about the size of the comp i think its too small but im new to turbos so i dunno

 

There's no way to know that it's too small without properly ID'ing it, to do that you need to take both housings off and measure both wheels on the inducer and exducer. Otherwise you are just guessing, Garrett turbos are not one size fits most. For that matter, no turbos are one size fits most. A/R on the compressor side tells you nothing about which wheel it is and how much it will flow. A/R on the exhaust is completely dependent on the exhaust wheel, since A/R is just a ratio.

Divided T4 is good for rotaries. Punctuation is your friend.