Supporting Upgrades for T28

[sjbsuperman1425]

Well my turbo is siezed up after two summers of daily driving, no blow off valve, and spirited driving. Now I'm looking for either a T25 or a T28. I have a guy that has a T28 now that I may pick up, but that soley depends on what I need in supporting mods for it to work.

Installing it would be no problem, but do I need injectors, MAF, and a fuel controller if I were to run off whatever the wastegate pressure is (im guessing 8psi)? I never really looked into it so I'm not sure and any help would be appreciated. I figure this is a good time to upgrade some things, but I just need to know what I need to do.

[Ca_Silvia]

If you run 7-8 psi you will be fine but if you do get this turbo, upgrades are knocking

[sjbsuperman1425]

i have a brand new HKS EVC-S I haven't even touched yet, so it will go untouched for even longer. But thats what I needed to konw CA_Silvia thanks.

Should I return to the stock manifold or keep the tubular?

[float_6969]

STOCK MANIFOLD! I gained SO MUCH bottom end TQ going back to a divided manifold. And that's with the HKS manifold that's got WAY more runner volume than the stock manifold. I'll never run a tubular manifold again unless it's paired/divided.

[sjbsuperman1425]

alright so that means S14 T28 with stock manifold coming next spring! All the install info is still around the forum, but I'm getting all the lines and drain tube from the T28, so should I just use that for the oil drain? What are my oil feed and drain options?

[sjbsuperman1425]

Well here is what I've searched. i'd appreciate it if someone could tell me if I have it right...

S14 turbo, turbo inlet, and turbo outlet must be used
CA coolant lines and oil feed line can be used (S14 T28 has a built in restrictor correct)?
Compressor may need to be clocked
already have SR20 O2 housing and downpipe
7-8psi is ok on stock fuel system

My questions are as followed:
Does the S14 T28 have a built in oil restrictor?
If I get SS lines, do I get the CA lines and add a restrictor or not?
Do I use the CA or S14 Oil drain?

Thanks everyone. I was going to wait to save up for a T3/T4 later on down the road but this may change my plans depending on what I can get out of it. Nistune, injectors, and MAF will come shortly after this turbo.

[roast]

AFAIK, you WILL need to clock the turbo. I had to clock my SR T25 on my old 240sx w/CA.

As for an upgrade path, I think you'll be fine with the T28 until you blow something up or max the turbo out.

[Ca_Silvia]

I can't stress how much easier SS lines are to work with, i fully reccomend them.

Unless the s14 T28 is ball bearing you do not need a restrictor.

Most SS lines do not come with a proper sized restrictor for BB turbos. FR sport for example has too large of a restrictor included in there SS line kit for what Garrett reccomends should be used.

[float_6969]

My questions are as followed:
Does the S14 T28 have a built in oil restrictor?
If I get SS lines, do I get the CA lines and add a restrictor or not?
Do I use the CA or S14 Oil drain?

Oil restrictor is not built in, but IIRC most of the S14 turbo's weren't ball bearing. If it's a non-BB turbo, then the restrictor built into the 90° fitting coming out of the block is fine. If it IS a BB turbo, you'll need to buy a restrictor and using the stock oil feed line will be come VERY difficult.
GET THE SS LINES!!! I've done it both ways and it's TOTALLY worth the money. The stock hardlines are pain to work with. See above about the restrictor.
CA oil drain with the holes in the flange elongated so it will bolt up. I carbide bit on a dremel works decently well.

[sjbsuperman1425]

CHECK LIST:
Turbo
Turbo Inlet and Outlet
Stainless Steel Lines
SR20 elbow and downpipe
Elongated CA18 Oil Drain

Sound about right?

The only other questions I have are how do I tell if its a ball bearing turbo, and which lines do I get? I'm guessing the CA lines are probably the onles, then if its ball bearing, i just need to get the right size restriction and bolt it up correct? I think the restrictor sizes are in the "how to make your own turbo lines" thread.

[sjbsuperman1425]

also, for the compressor inlet and outlet, the stock CA one can't be used because of size correct? Can a SR20 T25 inlet be used instead of the S14? I'm having a real hard time finding the inlet and outlet for the T28, besides from FRSport..

[sjbsuperman1425]

another question comes to mind..what are those who have a T28 using the S14 inlet/outlets using for an intake pipe?

[sjbsuperman1425]

the stainless steel lines I want to buy are the ones for the CA18 correct?

[Ca_Silvia]

the stainless steel lines I want to buy are the ones for the CA18 correct?

Yes

Just buy the T28 adaptor from FRsport, i have it it works great.

As for the intake just build it for whatever size turbo inlet you buy and you're on your own for custom making the new intake. My intake is actually 2 intake kits for a Honda B16 i hacked up, works great all mandrel bends too.

[themadscientist]

STOCK MANIFOLD! I gained SO MUCH bottom end TQ going back to a divided manifold. And that's with the HKS manifold that's got WAY more runner volume than the stock manifold. I'll never run a tubular manifold again unless it's paired/divided.

ZOMG where did you find one of those!

[sjbsuperman1425]

i just got my T28
my question is since i have to clock it, will the wastegate be able to bolt to the stock location? I thought i read in a thread somewhere that people were grinding the manifold and/or turbo to make it fit on the stock manifold. any suggestions?

[s13drifter88]

U should nly have to clock it from about 12 oclock to 1230. 1 oclock is a bit much. If youre unsure if its ball bearing id google the serial number on the chra. dont grind the turbo. my ca had an sr t25 when i got it and the previous owner had ground the turbo. BOOST LEAK!!! If you drift and love to rev your heart out like me then id stay turbular manifold coz youll gain alittle and keep more top end. Stock s15 t28 will run 10psi on the wastegate but youll be fine for that in stock form. the stainless steel lines should come with a .064 restrictor fitting, if its ball bearing u can purchase a .032 from frsport.com for like $12. The lines I have for my CA are the DIF lines from frsport a well, the only draw back is youll need to purchase a -3an banjo fitting separate since it doesnt come with that and youll have no way to attach the oil feed line to you block. future mods for use of your evc-s and the 28 shouldnt be to extensive. id add an n60 or n62 maf with a set of 550's and rom tune. all in all should keep you under a grand for those 3 and youll have a resposive easy 270-280ish whp car

[s13drifter88]

If you have any other questions man feel free to call me at 256-679-7762, please text first tho so I'll kno who you are since I usually dont answer numbers I dont know. Crazy ex'es get realy frusterating lol. Ill be more than happy to do my best to help and answer whatever questions I can to the best of my ability seeing as how Ive been through you situation twice

[sjbsuperman1425]

14411-69F00 is the part number on my turbo. I thought I read somewhere that some T28's were journal bearing correct? Does anyone know if this part number is for a non-bb or BB T28? Thanks.

[float_6969]

Most S14 T28's are journal, All S15 T28's are BB. You only need to clock it a very small amount to get it to clear the stock manifold. It shouldn't effect the function of the wastegate. And I'd stick with the stock manifold. IMHO, what I gained in the top end from the tubular was NOT worth what I lost in the bottom end.

[sjbsuperman1425]

so wait, if its journal bearing I dont need the restrictor, so how will I tell if it is or not? haha. i gave S13drifter88 the serial number and he said it was BB. I'll post it up and google it tonight after work and see what comes up.

I agree Ryan, my car was a dog off the line(no butterflies and tubular manifold).

Question, will spray painted parts in my oven "stink up" the oven? I wanna bake some of that VHT ceramic coating paint for my manifold but dont have a spare oven lol

[float_6969]

The tag on the turbo should have 3 rows of numbers. Their meanings are as follows (from what I can gather on the net. Don't take this to be the absolute truth)
1st row: batch number, it tells you when/where it was built
2nd row: OEM P/N (this is the number you listed. It's a Nissan part number)
3rd row: chra number. This is basically Garrett's P/N. 466541 is a ball bearing cart with a 60 trim 60mm comp wheel and a 62 trim 53.8 mm turbine wheel, 466543 is a brush bearing cart with the same wheels. If it ends in 01 it means the "normal" turbine housing, if it ends in 02 it means the S15 turbine housing with the splitter between the turbine and wastegate exit.

[float_6969]

OK, more research has yielded this;
There are two turbos that came out on the S15. They are both the same apart from the fact one is a ball bearing turbo and the other is a standard plain bush bearing turbo. There has been plenty of discussion on various forums about which cars came out with which turbo. It seems the earlier cars did come out with ball bearing and the later model cars came out with the non ball bearing. Either way the turbo selection didn't seem to have a noticeable affect on performance.


It looks like cars 6 speed manual cars built between Jan 1999 and Oct 2000 got the ball bearing turbo and cars built after this got the non ball bearing turbo. Indications are that a 6-bolt housing means it's ball bearing and a 4 bolt housing means it's non ball bearing. The best way to check though is to look at the part number on the turbo. It's a small plate in between the compressor and turbine housings.

* 14411-91F00 is ball bearing
* 14411-69F00 is plain bearing
* 14411-75F00 is plain bearing, used Nov 2000 onwards

The factory spec turbo is T28

* Turbine - 53mm T25, 0.64 A/R, 62 trim 38.5mm outlet, Inconel wheel
* Compressor - 60mm Exd, 46.5mm Ind T3, 0.60 A/R, 60 trim

The factory spec turbo is pretty much the same as the Garrett GT2560R and is good for a little over 200kw at the wheels

[s13drifter88]

I was able to ID his turbo by the number 466541 which is an S15 Spec R OEM T28 or in Garretts Books it a GT2560R - 466541

[sjbsuperman1425]

Thanks for all the help Ryan and Kyle(?), I'm going to try and find time to clock the turbo and order the lines and all adapters/fittings im going to need to install everything over the winter this weekend. I hate working two jobs, going to school, and trying to play with my baby. I'll try and do an update of whats been going on with the car in my other thread I started awhile ago. Thanks again.

[s13drifter88]

Lol, Kyle works but I go by Slynki