So i thought i had A28 turbos, but i dont. i guess they are an older iteration of the turbo. a k16/garrett hybrid. just not sure what type. my understanding is they could be a 2860, 2868, or 2871 with the k16 side. Jake was helping me out, but hasnt gotten back to me after the newest set of pics. maybe he'll chime in. he was the one that realized they were k series garretts.
i also used some calipers to get a couple measurements. i didnt remover the housing so all i was able to measure was the turbo inlet. inside and outside. not sure if that might be able to tell you 2860 vs 2871 vs whatever...

inner: 54.19 and a 52.14. same inlet, but i may hav nudged it pulling away from the car, so i measured it twice and wrote both findings.
outer: 59.38 or so...
hope that helps some. and i hope these pics and measurements make sense to someone.

pictures...



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they made that type of turbo with a k24 hot side too not just the k16. if you take the snail off you can just measure the wheel.

 

damn, so i could have a k24 side instead of the k16? this is getting complicated...
whats the easiest way to check with them on the car? where should i look? can you tell by the pics posted here? i was able to take these pics with only removing the inlet pipes.

or do i actually have to remove the turbo to confirm which hotside k16 vs k24?

 

You would need to drop the exhaust to look in the back of the turbo. Whos kit? did they do injectors? or just the 5bar?

 

apparently an old evoms setup. 60# injectors.

so drop the exhaust and takes pics of turbos from there... ok. anything to measure to be sure? also, does having measured the inlet help identify 2860 vs 2871 or anything? or do i have to dissassemble the turbo? (cause i dont know how to do that...)

 

Is the fuel line steel braided with a fire jacket by the motor? aeroquip filter by the clutch slave? The turbo inlet piping molded plastic? the early kits did not water cool the turbos but that could have been added. the 6 bolts on the back side of the compressor housing is all that holds it on. fully remove them and the WG bracket, then pull it straight towards the front of the car. At closer look those are old WG's as they have the bent all threaded rods, they break so I would replace them while you are there. Its just the rod not the whole WG. FYI stock injector 28 16k turbo =gt640 kit. fuel line, 2.5'' turbo intake pipe, 60lbs injectors 28 16k turbo= gt700 evoms kits. never ordered a kit myself but I am sure if you sent k24s as cores they would use them to build a turbo around them. you should be able to search "GT700 kit" for more info.

 

its not an exact kit anymore. it has gone thru multiple iterations before i purchased it. the seller sourced these turbos for me before i purchased car, since he had multiple pieces from his "old evo700 kit" lying around, we decided to revert to the old 700 kit. injectors, tune, turbos, inlet pipes etc...

now, to be clear... im not very car savvy. especially with this car. so you are saying i need to take off the exhaust completely to examine the exhaust side of the turbo (to determine k16 vs k24) is this correct?

and what about this part...
"the 6 bolts on the back side of the compressor housing is all that holds it on. fully remove them and the WG bracket, then pull it straight towards the front of the car"

is this to look at the entire blade? this would basically be pulling the turbo apart tho right? is that generally safe to do, for the sake of just examining the blade?

sorry if i sound remedial, but i kinda am with this. thanx for the patience and help. im just trying to narrow down exactly what the turbo is. thanx a bunch

 

i'm 90% sure they are old A28's BUT we did 2860's 2871's and a journal bearing version of the 2860!

i'd need clear pics of the oil drain flange and accurate measurements of the wheel inducer diameter to tell you exactly what they are

then again, it could also be an A3071R if the backside is a K24

 

I was told the were a previous generation A28. So that would probably make more sense then me having a 3071-k24. But again, who knOws. That's why I'm here asking, and I appreciate it. So I will need to measure the inducer part of the wheel itself, correct? And that would mean pulling the housing off to reveal the wheel? I just want tO make sure I have it right. And oil drain flange... I'm sure my mechanic will know what that is and where it's at... Told u I'm a noob.
Thanx for the help everyone!

 

i need the tip diameter, so if you have a feeler gauge you could essentially measure the diameter of the inlet right at the wheel

 

Ok I'll check and see if we have one of those. That would check gap between the inducer and the inlet, and with known inlet width minus known gap width, there is the inducer width? I think?
And about the oil drain flange, is that easily photoed from under the car with turbo in place? Is one side easier to spot vs the other? If I'm honest, I have now idea what it is or looks like (aside from a quick google search, to help educate me... No such luck)

Thanx again

 

the inlet diameter at the wheel would be fine, i know the tolerances for clearance so i can subtract that, just get a measurement as close to the wheel as you can in mm

the oil drain you would need to drop the sump and take a picture, the BB units have re-drilled holes, the journal bearing units do not

 

ok i will get the calipers back under the car next week and get a more accurate measurement than the 54 & 52 mm that i got... im sure those probably arent too accurate.

thanx again for the help. my main purpose in trying to decide exactly what turbo i have, is to help determine what potential they have, if they can be upgraded with better parts at all to get more power, or if i should just get new turbos alltogether.

thanx again

 

Took more accurate measurements and found, with the help of Todd @Proto and Jake @ Tial, that these have a 2860 wheel. Thanx for the help guys!
It seems that I can cram a 2871 wheel in there for a bit more power. And while a newer bigger turbo would be great, this option is much much cheaper. Bigger turbos would be nice tho...
Any other thoughts on modifying the current setup k16/2860 turbo instead of 2871 wheel?