GT2871r on to std manifold

Ally

Member
Hi Guys,

Will a GT2871r bolt straight on to standard manifold or will improvement/New manifold be needed?
And what else will be needed if so?
 

alphadrex

Member
Hi Alphadrex,

If you could let me know, also did you have to have a spacer made up?

Sent from my SM-G965F using Tapatalk

Hey Ally,

So here's the list I came up with...

GT2871R Fitting Tips:

-Manifold Spacer...I didn't feel like going through the trouble of making it, so I just bought an SR20 Vibrant flange. It comes rough (i.e. warped a little), so I brought mine to a machine shop to be resurfaced. If I remember correctly I think I got the 1/2" one.
-Extended Length Studs...you won't find them, make them from ready-rod (M10x1.25 Thread). Measure the stock ones add the thickness of the spacer plate and cut to length. I believe mine ended up being approx. 60mm but double check.

-Clocking...get patient

-Actuator...I bought a bent rod one from ATP Turbo because my clocking required a signifcant side strain on the straight rod one, and I didn't want to rely on a 25yr old actuator. If you want to use a stock/straight rod you can worm out the stock bracket on the clocking mounting holes to give enough, but it's still shady.

-Oil drain...worm out fitting holes and test fit many times until adequate alignment is achieved

-Compressor Inlet/Outlet sizes on the GTX were different than listed in the article, so you may need to buy different sized silicone hose adaptors/piping for your boost pipes.

-Hoses/Fittings...got an SR20DET turbo fitment kit, but had to order a few pieces from a hyd. shop and ATP Turbo.

I think that's all. Hope it works for you. If you go GT3071R, I think fitment gets even trickier...

Alphadrex
 

astarozna

Active Member
Sorry fellas haven't had time to take the pics, but as soon as i take i'll post them up. It is a tight fit but a fit never the less.
 

GTIR Datsun

New Member
Hi Guys,

Will a GT2871r bolt straight on to standard manifold or will improvement/New manifold be needed?
And what else will be needed if so?
Like 5 years late but I will put my 2cents in for any one in the future....machining needs to be done I have All the exact measurements and all u need to do is take your manifold and compressor housing to any decent machine shop and they will do it ...not hard and a cheap way of having if fit properly
Flange to head was milled and compressor housing turned down
. close but fits
 

Cathode

Active Member
Odd, mine fits straight on. The only thing was the snail on the turbo fouled the gear box housing so i had a 10mm spacer made up to fit behind the manifold.
 

GTIR Datsun

New Member
Odd, mine fits straight on. The only thing was the snail on the turbo fouled the gear box housing so i had a 10mm spacer made up to fit behind the manifold.
Luckily I read this I'm getting a manifold made up
After googling images some of them look alot smaller than mine what size inlet on the compressor was yours I hade to mill the manifold to kick it up and out and turn the compressor housing down from 4inches to 3 and it still clears the gear box by about 3mm
My turbo is GT25/40 aka gt2871r .....so the internet sez....same as you??
 

Cathode

Active Member
Mine is a GT2871R same as yours. i'm trying to get my head around what you've had to do. i can't think why you would have to do all that work.
 
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GTIR Datsun

New Member
Luckily I read this I'm getting a manifold made up
After googling images some of them look alot smaller than mine what size inlet on the compressor was yours I hade to mill the manifold to kick it up and out and turn the compressor housing down from 4inches to 3 and it still clears the gear box by about 3mm
My turbo is GT25/40 aka gt2871r .....so the internet sez....same as you??
 
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