a few questions new to a turbo cars

[Eclipse1996x]

first off what kind of boost should i be getting in first gear and is it lower then 2-5th? 97 GS-T
in first gear i get around 5lbs if i am just normally driving if i put my foot down i get close to 10 lbs but in 2-3-4th i get around 14 lbs
and if this isn't right what should i check for?

my next question is i don't have any upgrades car is basically stock after market air filter i think is it

now i love the look of a FMIC with out having any upgrades in the car will it effect my car in a bad way to put a FMIC on the car like an overkill type thing or will it just not give me much in the way of performance and are there other upgrades i need to do before getting a FMIC

i am gonna go with a Punishment Racing FMIC


thx any info would be greatly appreciated

 

[95talongirl]

That sounds about right. You'll get more boost pressure in 3rd because of the gearing in the transmission. The lower gears "run out" of rpm quicker; but are designed to get you going.

As long as you don't go TOO big on the FMIC, you should be alright.

 

[Eclipse1996x]

thx a million for your quick response

2g eclipse/talons just look beast with a FMIC

 

[9!'clipseDOHC]

Having a FMIC shouldn't hurt your performance but it also probably won't help you much at stock power levels on a T-25 as your stock side mount should be able to handle cooling what little boost it is seeing. The only down side you could run into is cooling issues with your FMIC core blocking your radiator, but there are ways to correct that. It definitely won't give you the most bang for your buck at this point. Check out the upgrade paths if you haven't already but in the end it's your car and your money and if you want a FMIC too look cool then go for it.

 

[6A12TT-7G]

Yes, lower psi in first gear is normal as there is minimal load on the engine and you're only in gear for a short time which means minimal exhaust gas output and subsequently little spool, hi-tech turbos have adjustable vanes that counteract this. In higher gears the engine is under extra load and more throttle position is used allowing extra air/fuel flow producing much higher exhaust gas charging through the turbine wheel spooling up the pounds.

As for the intercooler, minimal gains in hp will be achieved by upgrading to a full kit. What it does afford you is the ability to up the boost safely and that is where the gains are made. Aluminium is an excellent heat transfer medium, it can so quickly absorb and disperse heat that it balances the the inside air with the outside air. The larger the surface area, the more heat it can deal with. When air is compressed by the turbo it gets hot, it's then passed through the intercooler which drops it back closer to it's original temperature making it safer to shove into the engine. Higher boost pressure = higher intake air temp. If the air coming in is too hot, the air fuel mix ignites too early and can cause catastrophic damage to your engine. This is what is known as pre-detonation.

Bits i'd recommend are a turbo timer and boost controller.

 

[g4ebguy90]

Igniting to early I don't think is the correct term. More like ignites uncontrolably.

 

[6A12TT-7G]

It's fairly accurate, the largest cause of failure in this situation is the gas expansion taking place before the piston has completed the compression stroke, putting massive stress on the conrod and crank, it also causes pinging, which is when the face of one explosion crashes into another coming back at it causing a shockwave that can create more pressure in your cylinder than it can handle. In an NA car this effect is mostly tolerable but is likely to cause head gasket failure. On boost however the cylinder pressure can become astronomical. This is when bits of your engine start searching for an exit...

 

[miguelmcv]

I won't discuss Detonation with you guys.

To the OP.

If you are saying that it is (STOCK).

How are your making 10 to 12 PSI?.

The Stock Turbo (T25) will run only 7 PSI, (STOCK OBVIOUSLY).

Do you have a MBC Installed?.

Do you have an Aftermarket Wastegate?.

If you don't have any upgrades, then you might have a bad Wastegate, or is not hooked up correctly.

A Pic of the turbo setup could help us a lot.

Ho, I forgot about the MFIC.

If you are not planing on boosting up, or installing upgrades to your car.

I would recommend the MFIC only, with small Pipes, (DON'T GO WITH 2.5 PIPING) It will bring down your performance.
Your T-25 will take a long time to put the full pressure to all the piping which will become more lazy to take off.

T-25 will suffer with 2.5 piping...

Unless, you upgrade to a 14B Turbo, or you Boost up the T-25.

 

[6A12TT-7G]

I was wondering on the boost level myself. If anything there may be a leak in the actuator's control hose which would act the same as an MBC without the control, a decent leak can put your turbo into free spool....

 

[miguelmcv]

I was wondering on the boost level myself. If anything there may be a leak in the actuator's control hose which would act the same as an MBC without the control, a decent leak can put your turbo into free spool....