will my upgrade require retune?

[CABLODSM]

Ok so my 96 gst t25 was leaking oil into exhaust causing smoke..

I installed a brand new big16g td05h (ported) and a Godspeed fmic..
Haven't started it yet because need to buy a intake hard piping kit that fits my bov
and fix my oil filter housing leak still.

My question is.. since the bigger turbo and fmic will it run ok on stock ecu.
I don t have ecm link yet

 

[1990dsmkid]

You will be fine. Just stay at stock boost.

 

[keltalon]

Just report back after running the car on the above suggestion for a while and let us know if all is good.

 

[CABLODSM]

Ok I will. I don't know how to adjust boost or haven't even purchased a boost controller so it will be stock boost no doubt. Prolly won't mess with it till Sunday but I'll update then

 

[tmoney20g]

In case you're new to the whole turbo thing, and just for theoretical purposes....here's what's happening (let's say at 12psi on both setups).

If your stock setup is A, then your b16g+fmic will be called B.

Say A sees intake temperatures of 200F, and this is normal. At the same boost level, the 16g+fmic will provide you with the same amount of air, but at a cooler intake temperature and density of gas. The stock system can provide enough fuel for this up to a point, which is why they're telling you to keep it stock boost.

The 16g can provide you with nice dense air at boost levels higher than stock, at which point you surpass what the ECU can overcome, then you'll need tuning.

If you are new here, you'll at least want an aftermarket boost gauge as one of your first additions to the car, just in case you floor it thru a cool highway tunnel near you and you notice the car is pulling unnaturally strong, then look at your boost gauge to see it pegged at 35psi, when you have it set to 12psi. Which would mean a vacuum line blew off and could potentially blow up your motor.

 

[CABLODSM]

In case you're new to the whole turbo thing, and just for theoretical purposes....here's what's happening (let's say at 12psi on both setups).

If your stock setup is A, then your b16g+fmic will be called B.

Say A sees intake temperatures of 200F, and this is normal. At the same boost level, the 16g+fmic will provide you with the same amount of air, but at a cooler intake temperature and density of gas. The stock system can provide enough fuel for this up to a point, which is why they're telling you to keep it stock boost.

The 16g can provide you with nice dense air at boost levels higher than stock, at which point you surpass what the ECU can overcome, then you'll need tuning.

If you are new here, you'll at least want an aftermarket boost gauge as one of your first additions to the car, just in case you floor it thru a cool highway tunnel near you and you notice the car is pulling unnaturally strong, then look at your boost gauge to see it pegged at 35psi, when you have it set to 12psi. Which would mean a vacuum line blew off and could potentially blow up your motor.

thanks for feedback and yes I'm new to turbo things ha.
Another question is where can I find another hard pipe with a female fitting that connects to the oil filter housing.. the one I connect my turbos braided line to? I had to cut mine since it was so rusted when I took off the t25 and the braided line isn't long enough to reach the housing either.. was going to clamp a hose on it but I think that side is high pressure so not sure. Parts stores don't supply this line.. I still need to check mits dealer when I get paid next

 

[tmoney20g]

Which "hard pipe" are you talking about ? Can you post a pic for reference?

Don't go to the dealer, a great first site to browse around on and type in some keywords for stuff you are looking for is www.jnztuning.com

josh has the lowest priced oem stuff on the internet.

 

[CABLODSM]

I'm referring to the hard pipe as in the solid aluminium line that has a female fitting on one end and male on the other that goes to the oil filter housing.

the stock set up the t25 had..

the other hard piping i was referring to was the intake side , i need to buy a intake hard kit with the bov connection .. the stock pipe is 2.5 inches and my intercooler piping is 3 inch

 

[tuurbo junkiiiee]

Your maf sensor should keep everything in order. The only time you want to get a tuner for is upgrading things like the fuel system. Pump, injectors etc

 

[mercaholik]

Since you are new I'll explain a couple of things. First off different turbo's will put out different volumes of air at a particular boost pressure ( well pressure ratio). So at say 12 psi the 16g will flow more cfm of air than the t 25. That will effect the air fuel ratio and too lean of a ratio and the cylinders will run too hot and cause all kinds of problems. While it "shouldn't" be a problem at lower pressure and there probably isn't a big difference in cfm or pounds per min between those two turbos at that psi, you really should get a way to tune. Stock air fuel ratios are pretty rich for a safety factor but you won't know unless you get a wide band o2. You'll need a boost pressure gauge and should get a boost controller and a way to tune like ecm link as your first mods.

 

[LandSpeed-DSM]

CFM is a volume flow rate, which is not really what changes so much as the charge density when swapping for a larger turbo and better IC.

Displacement/VE/RPM determines the CFM throughput.. so if you have only replaced the turbo and IC, the volume flow will largely remain the same.