Guys a little help if you would. Some of you may have seen my other thread about my broken GT3071R. I posted up a video of it here:
Well after speaking to some turbo specialists here in the UK I was asked to send in the product number found on the plaque on the center of the turbo.

Now I just googled the number, and it turns out it's a GT2871R and not a GT3071R as I was led to believe when I bought it used a few months ago.

Not all bad I guess - the GT2871R is a great turbo for a Miata right? Only the problem is that my turbo seems to have a different compressor housing than a 'normal' GT2871R. It has 0.5A/R stamped on it, which makes it huge like a GT3071R. The exhaust housing has 0.86 stamped on it.

So it seems I have a GT2871R with 0.5AR compressor and 0.86 exhaust housing.

I'm not a turbo expert so I'm not sure if this will be well suited to my goals. I plan to make around 400-420 flywheel horsepower.

So can someone help me ID this thing and tell me how it should perform? The intake measures 2.75". Here as some pictures of the actual turbo:







The code on the plaque reads:

446179-5032

I'm feeling pretty pissed off right now and it's been too long since I purchased the turbo to get anywhere with the original seller. If someone could tell me what this turbo should perform like that would be perfect.

I've never seen a GT2871R with this size compressor housing so don't know what it means.

 

Compressor A/R means nothing. It's just the style of compressor, and it doesnt really have any impact on performance.

I made 350whp at 17psi on a 2871R w/ 0.86a/r turbine. 400whp wil be a stretch but I think it's doable with the right supporting mods and a bunch of boost (probably ~24psi). That is a great turbo, and honestly I'd rather have that than the 3071R you thought you had. Shuiend will be along shortly since I'm pretty sure he has a 56-trim 2871R, but that looks like a 56-trim turbo.

 

He did say 400-420 Flywheel horsepower which is only 370-390 to the wheels so I think that is definitely doable.

 

Thanks for chiming in and it's reassuring to hear that. If the compressor housing makes no difference, why would they fit a different one?

 

Maybe he had the same issue you're having and thought it was the blades contacting the housing so he swapped on a different one only to have the same result? So then turned around & sold it?

 

There's only like a 15-25hp difference between the two turbos, theoretically.

I wouldn't be upset about it.

Regardless, you're fuxored. Garret CHRA exchange scam will rescue you though.

Or, for the same $600 you could buy a Borg Airwerks that you can rebuild yourself. For like $100. Issue though is you would need a new downpipe cus it's not 5 bolt.

 

The only choice I have dealing with UK companies is to buy a new CHRA, which is going to cost approx £600 or $947.

The Garrett CHRA exchange program is for USA customers only. You guys get all the luck it seems! Anyway I got in touch with ATP who said an exchange wouldn't be a problem and would cost $547 or £346. I've sent them a reply asking if they'd have any issues sending it to the UK (which I hope they don't!)

Failing that, I'm left with 2 choices:

1) Stumping up nearly $1000 for a new CHRA in the UK
2) Finding someone nice enough to take delivery of my CHRA in the USA and send it to me (that I trust with it & I'd cover shipping charged obviously).

I'll wait on ATP's reply, but if it's a no go, I may be sending out a pleading email to some of the forums trusted vendors.

Just so gutted after building this thing since last November I got 2 days of glorious boost and this happens.

 

PM me if you want any help.

 

Thanks for the offer. Will be in touch if ATP won't play ball with British customers.

 

Just got a reply from ATP. The price has dropped to $472 and $69 shipping. So it works out at $541 / £343 shipped to my door vs $880 / £558 ordered from the UK.

God bless America.