So this summer my front iron cracked at the turbo oil feed banjo hole, killing my engine and oil starving and subsequently murdering my turbo. I've got the engine pulled out now and am in the process of rebuilding, but I need to figure out what I'm going to do about a new (or used) turbo.

A little background on the car;

a 93 RHD FD3S, bought with a single turbo conversion already done.
I'll keep the list down to just the pertinent ones.

Turbo- not sure on the model, I was told it was a T04B but I'm not entirely sure,
all I know is that it spooled far too slowly for its size, and generally performed poorly.

PowerFC- was running the stock maps when I got it, other than the single turbo setting and a few basic things were enabled. not sure who tuned it, but clearly they did the bare minimum. I cleaned up the fuel maps bit and fixed the ignition maps, especially the splits.

AEM AFR gauge, was running pretty generously on fuel, mostly 13>12>11 so I doubt detonation caused the crack, then again the PFC knock sensor was useless, so its possible

a fairly decent quality no-name manifold, divided, stainless and equal length with an external waste-gate (also no-name)

Blitz boost controller was running anywhere from 12-15 psi.

front mount intercooler.

stock injectors, map sensor and fuel pump.

So my goals for this car are pretty modest, 350-400 hp, with 3.0-3.5 response.

Here's the thing, I've got too many project cars on the go right now and I'm extra sick of working on this car (I've fixed everything you can imagine), so I want(ed) to keep the cost down, originally I was going to throw in a CHRA, and call it good. but I've started to rethink that, If I gotta spend the money, I may as well find a turbo that performs more towards what I want out of the car. I've been looking at turblowns tdx61 but it seems I'm not going to get anywhere close to 400 on stock injectors, the bill keeps climbing..

also, I have to do all the tuning my self, since there isn't a decent Rotary-PowerFc tuner within a thousand Km of where I live. And having to completely re-tune my PFC for new injectors and Idling gives me a headache just to think about


But hey, I'm here because I'm open to suggestions on where to go with this build.

While we're here, here's my turbo for an I.D.:
I measured the wheels,
compressor 53mm Inducer 70mm Exducer
Turbine 73mm Inducer 63mm Exducer
(keep in mind these are rounded, and with caliper inaccuracy, they could be +- 1 mm)
It's a journal bearing oil cooled turbo, T3 divided with a 3 " vband. compressor housing states .60 trim


notice the damage to the compressor housing and the compressor wheel.
there's a tremendous amount of shaft play now.

Thanks guys.

 

Seeing as you are already running a T3 divided manifold and trying to keep costs down I would consider running a T3 or divided T3 T/h. A good BB option for a stock port T3 setup is always going to be a 35R and while the turbine is on the small side for most things it isn't bad for sub 400whp street car that is limited to a T3 manifold. Another option would be a T3 framed 5866 very similar to what you already have (58/76 comp 76/66 turbine) and while the A/r is smallish, if you were to look up some of the older builds on here running "T4 inlet" 35R's they are running the same A/r and most of them love the low end they get out of it. You also have the choice of 5862, 6262 or 6266. All would be billet (not really critical in your app.) and all could be BB or JB. If you're going to port the engine you may want to look at stepping up to a T4 manifold and turbo.

BW is pretty limited on their T3's and I'm not sure if the TDX61 comes in T3 or not, though I'm sure Elliot can come in and answer that.

~S~

 

hey, thanks for the advice! I was thinking about the 35R actually, but its and older turbo and and even now still goes for 1500+ for an authentic garret, I figured if I was going to pay that much I may as well get the TDX61.

I Forgot to mention I'm a welder and have access to a CNC plasma, so cutting and welding a T4 flange on my manifold is not an issue, so feel free to suggest T4 frame turbos.

Also, what do you think about the stock fuel system handling a 35R or a TDX61 at 15 psi?
would I have to upgrade injectors? and if I did, would the stock fuel pump keep up with them?

thanks

 

We do make a T3 frame version, the stageV turbine wheel is pretty close to a Gt35R turbine wheel in terms of size, but you are limited by turbine housing a/r( .86 is the largest). I would suggest putting a T4 flange on and running a .84( very similar in flow to the GT35R 1.06). We also offer a TDX57R which is similar to Sean's suggest of a 58/66( its technically a 58/65). In all honesty I prefer some of BorgWarner's sizing for the smaller sub 400rwhp cars. I feel the 65, or 66 turbine wheel is too larger for a 57/58/59 size compressor wheel.

 

So maybe bw s366 would be a better option? Keep in mind I'm running stock ports, I'm more interested in keeping the bottom end than increasing top end floor for an application limited to 15psi

 

Having trouble editing my post on my phone, meant to say s362

 

Borg Warner S200SX 7670

 

Yes you will need to do some upgrade likely to get the proper fueling at 15psi I would say at least secondaries and a pump. I forgot about the stage V turbine wheels Elliot mentioned, that could be another option as well. My only concern with the BWS200SX is the 1.09 housing. Being that the turbine is similar(slightly smaller even) to a 35R it will likely be a bit off between shifts such as the 35R 1.06 is that has a slightly larger wheel with a smaller 1.06 A/r. You could run the .83 housing though and for your app it may work well. As for the 65 or 66 wheel being too big you could look at the 62 as mentioned. A 5862 with a .84 housing would be very similar to the BW7670 with maybe a slight edge do to the slightly larger compressor inducer and slightly larger turbine and A/r. Both would perform similarly and both would do well.

~S~

 

Sean,

There is a 1.0 available for the s200sx, and the turbine wheel is 70mm vs the 68mm gt35r.

 

I'm liking the S200sx, I hadn't thought about going that small but it looks like it tops out right at the 400-450 hp sweet spot, which would give me lots down low for autocross.

I was just about to ask about the size of the exhaust housing, I'm thinking that .83 may choke the engine too much up top for the modest response gains, but I may be wrong?

and am I reading this right? it comes with a T4 foot print but T3 port sizing? what is this madness? and there's no option for a 3 inch V-band?

and yeah I'm coming to the sad realization that the stock fuel system isn't going to cut it. I'll have to head over to the powerFC section and see what I can easily run. Maybe 1600's.
I thought the FD pump flowed pretty well, but you think I'll need to up that too for a <400hp app? even with a pump rewire?
Walbro 255lph's, aren't that expensive but I don't want to fix stuff if it isn't broken.

Thanks for the input I really appreciate it

 

Yea I completely forgot they have the 1.0 option, I'm used to seeing the 1.09 listed, as for the turbine I was referring to discharge or exducer, 61mm versus 62mm. We're essentially splitting hairs here, I doubt much will be had by running a 70mm inducer over a 68mm inducer with the discharge essentially being equal, again you can't go wrong with either and being that it's not a EFR I tend to not worry about it as much.


The smaller turbine on the .8 divided housing will be very responsive especially in twin gate if feasible. Usually they will start to "feel' flat around 7k +/- but it can be offset a bit with twin dump gates. The issue you will run into with smaller A/r's on smaller turbine's is heat, not so much driving around per say but it will matter at the track. One of the better setups we did for a autocross car a few years back ran a TiAL 1.02 on a 35R turbine with a smaller compressor that was a very responsive car.

~S~

 

Hmm well the rev limit is set to 8000 grand at the moment, so thats a good 1500 rpm of choking and while my wastegate trunners are separate for a about 10-12 inches they merge before a single wastegate (wastegate is next to the bellhousing). So maybe a 1.0 divided housing then?

 

Yes use the 1.0