nissan 300zx and SR20DET - Miata Turbo Forum - Boost cars, acquire cats.

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Old 05-27-2007, 05:34 PM   #1
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Default nissan 300zx and SR20DET

Are the turbos from each car the same? By the same i mean do they both use the same manifold bolt pattern and the same Down pipe Pattern? I don't care about the air inlet and the intercooler piping.

I just need to know if they accept the same bolt pattern from both manifold and down pipe. Thanks.

Also, what turbo would you suggest for ~200WHP? on a 1.8l
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Old 05-27-2007, 06:17 PM   #2
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bump
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Old 05-27-2007, 09:24 PM   #3
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both should work ask sam navy via pm he might have more info.
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Old 05-27-2007, 10:16 PM   #4
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Default Nissan turbos

Ok- here's what I have found...

1984 300Z used a T3 60/63, oil only CHRA. (not sure on the a/r's)
1985-87 300Z used a T3 60/63, water cooled CHRA.
1988-89 used a T25. As far as the nissan guys are concerned, that T25 isn't good for much on the V6.

http://www.az-zbum.com/information.basic.shtml

The SR20DET used a T25, with various A/R - I think the biggest one was a .63 hotside. It was the GT2560 (I think) and had a T3 flange on the turbine housing. Others are probably a T25 flange.

This might help identify your flange: http://www.forcedinductions.com/help.htm
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Old 05-27-2007, 11:08 PM   #5
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now what about those 300zx about 1989 will those be using the T25 flange? and will they share the same exhaust flange?
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Old 05-28-2007, 12:16 AM   #6
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Your sig says you already have a sr20 t25. If it's from a red top then it's a pretty good turbo. Get it rebuilt, professionally or follow the write-up elsewhere on this site.

I think the 300zx t25 is smaller than the sr20 ones, don't quote me on that though.

Last edited by Efini~FC3S; 05-28-2007 at 12:18 AM. Reason: Adding
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Old 05-28-2007, 12:57 AM   #7
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mine is the 80 AR t25. I am asking this because i have an offer to buy a mani/downpipe for a 300zx turbo for a 1.8l miata and want to see if it will mate up.
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Old 05-28-2007, 01:42 AM   #8
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i think the turbine outlet flanges are different. the standard nissan t25 is a 5 bolt and the 300zx turbo is a 4 bolt t2 flange or somthing
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Old 05-28-2007, 01:44 AM   #9
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alright, i guess i'll just buy a HKS mani, and have an exhaust shop fab up a downpipe for me.
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Old 05-28-2007, 01:44 AM   #10
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also does nissan dealerships stock the flanges for the air intake and intercooler pipe for the SR20 turbo?
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Old 05-28-2007, 02:52 AM   #11
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Quote:
Originally Posted by Dow.tom View Post
also does nissan dealerships stock the flanges for the air intake and intercooler pipe for the SR20 turbo?
Probably not, post a WTB on a 240/drift forum, a lot of people have them, I also have them just laying around
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Old 05-28-2007, 11:53 AM   #12
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how much would you ship them for?
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Old 05-28-2007, 03:53 PM   #13
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Tom, you've been PM'd, but some guys here beat me to it.
As you can imagine, the stock SR20det compressor flanges are a hot commodity. The compressor inlet/outlet adapters will not work in a Miata application. They are both curved and will point the wrong way no matter how you clock the compressor. I did a **** ton of homework on this. There are two options. One, Dremel off the flanges on your compressor housing to make them round so they'll accept couplers... or buy the ATP adapters like I did.

Here you go for the Dremel method:
https://www.miataturbo.net/forums/showthread.php?t=7293

Here are the adapters you need. They are located in the Catalog-GT BB Install parts page. Be patient, the ATP website sucks:
http://www.atpturbo.com/Merchant2/me...gory_Code=GTBB
http://www.atpturbo.com/Merchant2/me...gory_Code=GTBB
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Old 05-29-2007, 06:48 PM   #14
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I have 300ZX T25 and an HKS manifold.

For the DP.
I found it was a lot easier to just make a flange then try a buy one. You can make one simply by using some 1/2" flat stock, drilling 4 holes for the turbo to mount and then use a torch/plasma cutter to cut out the center section.

I knew I should have built two of them at the time...
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