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16g, T25, T28???

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TypeOne

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Discussion starter · #1 ·
The time has come for me to finally step into the world of boost :heyhey

But, before starting this task of pickin and choosing the right parts I want to get some info on different turbos...

The stock turbo on an SR20DET(s13) is a T25, also the stock turbo on the late model Eclipse GST/GSX. (correct me if I'm wrong) Now, on a stock Eclipse, the Big 16G turbo is a bolt on upgrade from the T25, so my question is this... would a 16G bolt up to a stock SR20DET T25 turbo manifold? Would it be beneficial to use the 16G over a T25? I have seen greater numbers from the 16G, over the T25.. here is what I found:

Image


A much larger compressor wheel, compressor housing, exhaust housing and wheel, and almost TWICE the flow at 15psi, the 16G is a great upgrade for the Eclipse! Notice the much larger exducer bore on the 16G...and how much larger the turbine housing on the 16G is...and how small it makes that T25 look!

T25 flow: 265 - 280cfm at 15psi
16G flow: 505 cfm at 15psi

This particular turbo has been ported for extra flow.

Image

Here you can see the difference in the inlets. The 16G is on the right

Image

There is a clear difference between the T25's 6cm exhaust housing (left)
and the 16G's ported 7cm exhaust housing (right). You can also see
that the step has been removed on the 16G.

Image

Two very differently sized exhaust outlets! T25 left, 16G right

(Taken from DSMpower.net)



Also, since I have an SR20DE non turbo, does anyone know what size injectors I should use, I only plan to run 6-7psi of boost...

Any help would be appreciated!

Thanks!!
 
#2 ·
i like this post...the pics are a nice touch.

you have made alot of good points and it would be alot easier to get a t16g as an upgrade than a t28 and possible alot better but if it were a bolt on than you'd think that by now someone would have figured it out. If its true than you are officially THE MAN
 
#3 ·
i just did alittle reading and it seems like in 1995 they changed the turbo from the 14B to the Garrett t25...you may be on to something big here...this could change everything for me...if somebody knows whether or not this would work please speak up

I had a post awhile back asking if there were any turbo's from car built on this side of the ocean that would bolt up and almost all the responses were basically flames so if this is true than to everyone who flamed me on my other post......well im not saying anything yet cause i dont know whether it will work.
 
#4 · (Edited)
TypeOne said:
Also, since I have an SR20DE non turbo, does anyone know what size injectors I should use, I only plan to run 6-7psi of boost...

Any help would be appreciated!

Thanks!!
Click to expand...
They're 259cc stock right? I would assume 370cc's would work, unless you wanted smaller since you're running low boost...maybe 320ish?
 
#5 ·
just run 370cc injectors with 7psi wastegate.

About your post, I don't understand why this was posted. You do understand that the the T25 from the eclipse is completely different than the sr20det s13 turbo?

The 16G won't directly bolt onto the stock manifold. You will need the eclipse turbo dump pipe and get it custom made to fit on the down pipe. The fiting for the lines might be different in thread and location.

Why not pick up a BigT28 or a T28?
 
#6 ·
you need custom lines for coolant and oil, and you will need a custom dump pipe like nrg said, and yes i dont see why it wouldnt bolt up to the stock manifold they are both t2 flanges right?
 
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#7 ·
do you guys mean dump pipe like turbo extension or dump pipe like downpipe. The bolt holes for the turbo extension look very similar on the two turbos but there probably slighty different. How much different would the eclipse turbo extension be?
 
Discussion starter · #8 ·
nrg said:
just run 370cc injectors with 7psi wastegate.

About your post, I don't understand why this was posted. You do understand that the the T25 from the eclipse is completely different than the sr20det s13 turbo?

The 16G won't directly bolt onto the stock manifold. You will need the eclipse turbo dump pipe and get it custom made to fit on the down pipe. The fiting for the lines might be different in thread and location.

Why not pick up a BigT28 or a T28?
Click to expand...

I posted this because I'm curious... I want to know if the 16G turbo will bolt to the T25 manifold. If it wont bolt up...why not? If they are both T25 flanges.. I'm not worried about the dump pipe I can take care of that..

Please share your wealth of knowledge and inform me of the differences between the Nissan T25 and the DSM T25..aside from the dump tube and the coolant line ect...

Thanks
 
#10 ·
ok, as much info that u post on those turbo, I'm surprise to see that you don't know that the turbo on the Eclipse, and the SRs turbo are DIFFERRENT, it not even worth try to put those turbo on the SR or CA if that matters. I'll go with late S15 T28 for basic upgrade for about 280-300 hp on stock everything SR which is still a big gain over stock. Also to answer ur question. the flanges on two T25 are not the same.
which is why u will need to fab the piping, turbo extention ( o2 housing, dump pipe, what ever u call it) and the inlet pipe as well. which again...WHY??? when u can just drop in the T28. Just my .02 C
 
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#11 ·
Loofee95SE said:
ok, as much info that u post on those turbo, I'm surprise to see that you don't know that the turbo on the Eclipse, and the SRs turbo are DIFFERRENT, it not even worth try to put those turbo on the SR or CA if that matters. I'll go with late S15 T28 for basic upgrade for about 280-300 hp on stock everything SR which is still a big gain over stock. Also to answer ur question. the flanges on two T25 are not the same.
which is why u will need to fab the piping, turbo extention ( o2 housing, dump pipe, what ever u call it) and the inlet pipe as well. which again...WHY??? when u can just drop in the T28. Just my .02 C
Click to expand...
agreed.... why spend more money to make something fit, if you can use a turbo that would require less money to put on...????
 
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Discussion starter · #13 ·
Loofee95SE said:
ok, as much info that u post on those turbo, I'm surprise to see that you don't know that the turbo on the Eclipse, and the SRs turbo are DIFFERRENT, it not even worth try to put those turbo on the SR or CA if that matters. I'll go with late S15 T28 for basic upgrade for about 280-300 hp on stock everything SR which is still a big gain over stock. Also to answer ur question. the flanges on two T25 are not the same.
which is why u will need to fab the piping, turbo extention ( o2 housing, dump pipe, what ever u call it) and the inlet pipe as well. which again...WHY??? when u can just drop in the T28. Just my .02 C
Click to expand...


I posted this because I was confused about the flange sizes, not to be insulted. It seems that everyone on this site does nothing but flame, and belittle others that aren’t as knowledgeable as some people on this site. I really don’t know anything about the turbo itself, that’s why I made this thread.

It was a simple question, and I never said anything about using this turbo or saying it was better than the T28. Nothing to get all worked up about...

If you read the bottom of my first post (under the last pic) you’ll see that all of that was taken from a website, not something that I made. I had no idea that the (flanges) T25 from the DSM was different that the T25 on the Redtop and now I know. It seems like others had the same questions as well, because if both turbos were T25s then why would the flanges be different. I'm not concerned with the dump tube, cooling lines, oil lines ect...I know that would obviously be different, because if the application.

Please do not insult my intelligence; it was a very straightforward question. Also, I actually put some thought into this topic whereas other topics on here are like "what’s a redtop" or something stupid like that.

Again, any help would be appreciated

Thanks,
 
#14 ·
TypeOne said:
It seems like others had the same questions as well, because if both turbos were T25s then why would the flanges be different.
Click to expand...
Because the character code for the turbo describes (most of the time) its compressor/exhaust housing size and configuration, not its flange style. T25's off a SR20DET and CA use a T2 flange while the Mitsu flanges are different.

See here
http://www.nissanforums.com/showthread.php?t=34385
 
#15 ·
I did not reply as an insults to anybody inteligence. I was only surprise that u knew a lot about that turbo but nothing about ur beloved SR T25.
and to answer the question about the different between the CA and SR turbo yes the Ca t25 is crappy ans small it's only a .48 A/R comp side compare to the .80 from the ealier model SR, or the .68 from the later version. that why the CA make less power. if the same turbo was use or swap into ca..the same amount of HP ia gain. C
 
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#17 ·
Mitsu Turbo

OK I'm not the turbo professional but when I got my SR the stock T25 was fried. The company I bought my engine through I had done a lot of business through previously and the best way they could replace it was to get an Eclipse T25. Now I know that the power output isn't the same out of the GSX Turbo as the SR Turbo but it bolted up effortlessly everything was exactly the same. So I think this guy might be on to something. Just my two cents.
 
#18 ·
Mitsu Turbo

OK I'm not the turbo professional but when I got my SR the stock T25 was fried. The company I bought my engine through I had done a lot of business through previously and the best way they could replace it was to get an Eclipse T25. Now I know that the power output isn't the same out of the GSX Turbo as the SR Turbo but it bolted up effortlessly everything was exactly the same. So I think this guy might be on to something. Just my two cents.
 
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