With the proper engine management/ fuel system etc, what is the best turbo to replace the turbo II stock turbo with on a stock engine setup? (After cold air, header, downpipe, exhaust)

 

Your question is all over the place.
proper EMS but stock engine setup?
The S5 turbo is not bad at stock levels.
You can get it altered to a hybrid Stage 3 or 4 at BNR turbos.
Run that on an RTEK 2.1 and put some bigger injectors on like 750/1000's and you car is rockin'.

 

Thanks for the info. What exactly makes a turbo stage 3 or stage four though? what changes?

 

you/they are basically doing various modifications to a stock Hitachi turbocharger. BNR Supercars.

 

Thanks. I like that link you sent. Good info.

 

"Best" depends on a lot of things. Including budget, power level, purpose of the car, etc.

 

I'm curious in best as least lag and best response, looking for max of low 300hp range so 12-14psi I'm thinking?

 

personally, i've always had a thing for the 60-1. however, it's probably best if you post what you're running in order to get the best advice.

 

GT3076R w/1.06 divided T3 turbine.

 

The 76r? Felt big?? Ive looked and was thinking the gtx3067 t3/4 divided very similar but im a noob to turbos so yeah..

 

That's not exactly big and I would defer to Mr AaronCakes judgement. He has FAR more experience first-hand in these matters.

You would be well off going to his site aaroncake.net or going to his YouTube channel.

 

Go big or go home

 

I'll definately take his advice heavily, watched part of his rebuild vids lots of ProTips

good brand in that direction other than garret, was looking at mamba?? decent price sounds quality

 

A 3076R might be rather large for a 1.3 litre piston engine, but certainly not for a 1.3 litre 13B. It's actually a bit small. You need to think of turbo sizing for a 13B as one would for a largish 6 cylinder.

Now that said, the 3076R is a full turbo upgrade meaning the need for a new manifold, plumbing, downpipe, etc. It's a big job.

If all you want is something bolt on then the BNR stage 2 bolts right up and uses all the factory stuff. I am just not a big fan of the hybrid stock turbos as it can be difficult to control boost due to the wastegate design and it can sometimes be hard to achieve and maintain your target boost.

Note that all turbo upgrades require other mods to support them. Upgraded fuel system, EMS that can run that fuel system (no stock ECU...trust me on this), larger intercooler, etc.

 

Okay yes, about a 3.9. So if your base exhaust was from there I see how its small.

I looked around, no t3 divided manifolds just t4 is that gonna make a whole lot of difference? To go t3 or t4? In my mind it would slow down air velocity to go t4.. So by technical reference a t4 would mean more top end hp and t3 would mean better low to mid but would bog out earlier.

And going external waste gate, no down pipes/wg plumbing that dont come in a kit with a turbo and intercooler that i dont want. Then staying stock internal with the bnr has boost creep issue..

 

If you want a turbo that has all of it in one package, look at the Borg Warner EFR 8374 turbo. Its IWG with a built in recirculation valve. It has a true divided T4 housing with a true divided WG. Pricey, but about the same size as a GT35R. Once added up, a GT35 with 2 external gates, the BOV, and the manifold and lines is about the same price as a EFR kit.

Check out this site that has the kit.

BorgWarner EFR IWG Turbo Systems - Turblown Engineering

 

You won't find any T3 manifolds for the 13B as almost no one runs T3s on them. You'd have to have one made by one of the vendors or fabricate it yourself. You can also get an adapter that allows a T3 sized turbo onto a T4 manifold.

In very, very general terms, a larger turbine (T4) means less air velocity and theoretically a slower responding turbo. But that isn't always the case. The turbine size is only one part of the equation. Wheel sizes and trim play a large part. You can have T3 sized turbines flowing more than T4 sized turbines depending on how they are set up.

It really does sound like the best choice for you is a hybrid stock turbo. When the limitations are known, they are a nice setup for moderate power gains without having to replace the stock manifold, downpipe, etc. Boost creep won't be the issue. The issue will be holding boost to redline. The turbine is simply very overflowed by the larger compressor and becomes a choke point. That's not necessarily a bad thing. The car ends up very strong in the midrange which is very easy to drive and the few PSI you lose as redline is approached (typically when tuning these cars I see 15 PSI in the midrange, dropping to 11 or so as the car approaches 7K).

However you WILL ABSOLUTELY need to upgrade the intercooler. The stock intercooler is inadequate. If the stock intercooler is left in place be prepared for 200 degree F intake temps.

 

Our FD3S iwg kit will fit an FC in 7670 TRIM. This is a great 350 to 400rwhp turbo. I will have to check if it clears the N/A LIM when I get a chance...

 

There ya go. Manifold to fit a T3 on a 13B. Just remember that going full turbo upgrade means custom downpipe, wastegate (unless you get the internally gated but that isn't available on the divided housing) , full standalone, etc.

While the hybrid has many disadvantages, it will do what you want and bolts on.

 

Thank you, for now as its somewhat a budget build a bnr stage 3 will be where im headed for now, a t3 build will have to wait. Going into my plans my supporting mods will support the bnr and t3 so switching over will be the turbo, custom manifold, custom dp, and wg which pushes 2 grand in price difference. Its more than i wanna save for now, I just wanna drive my rotary already!! Haha

 

Borg Warner has a great line of turbos, currently using one of their 67mm s400 turbos and Jesus when that beast kicks in everything around you starts moving backwards.

 

Precision 5858. No lag, good price 620hp rating

 

5858 will have a hard time clearing 440rwhp FYI. This would be at 25psi too. 620hp is flywheel rating for a piston engine.