New Turbo

[93laserAWD]

95 GST

Car has downpipe, and intake, boost gauge, and MBC

My stock turbo has been destroyed ( t-25? )

What are everyone's suggestions for replacing it? i want to run 14-15 pounds of boost

thanks, ted

 

[YiNYaNg]

Remember it's not how much psi.... It's how much POWER you want!

 

[drocks22]

I would deffinitely consider the stock 1g turbo (14b). It can boost 14-15 psi easily, and you will feel a lot of gain over the T-25 at that PSI. Also it pulls all the way to redline. But like the last poster says it does matter on how much hp you want to push in the end.

 

[perley03]

First, I would find out what caused that turbo to kick the bucket. Then proceed with a new turbo.
What are your power goals? What do you want to do with the car?
If you are just looking for a replacement and going to upgrade later, just a 14B will do. Make sure you buy the swap kit since you are a 2G. If you want ~300hp, a EVO3 16G might do with a hell of a tune.Anything over 300hp and you'll want either a 50 trim or bigger, fuel injectors, fuel pump (255lph) and regulator, and some sort of management (SAFC, DSMLink, etc...)

 

[Splitpi]

PSI is irrelevent ... you want to look at CFM. A turbo that flows 440 CFM at 1 psi (actually its the differential PSI from atmosphere so in reallity in respect to a vacume it is ~15.7 psi) has the same potential as a turbo that flows 440 CFM at 30 psi.

A good substitution for the T25 is a 14b. Rewire the fuel pump and run it at 14 psi and you will see about 10-15% more CFM than the T25. That equates to more horsepower (0-40 more hp depending on setup and helper addons and fuel...etc). Oh and don't forget an SAFC or DSMLink to make use of it otherwise you may run to rich or lean and have more expensive problems in the future.

Here are some conversion numbers for figuring out how much fuel you need:

1 liter = 1000 cc
1 lph = 16.67 cc/min
1 lb/hr = 0.1667 gal/hr = 10.5 cc/min
1 gal/hr = 3.785 lph

So a Walbro 190 (@12V, 43 psi) flows ~ 168.45 lph, or (@14V, 43 psi) 208.83 lph, and a Walbro 255 (@12V, 43 psi) flows ~ 229.02lph, or (@14V, 43 psi) 261.83 lph according to to RRE, http://www.roadraceengineering.com/fuelpumpflowrates.htm

This means that the 190 @ 12v on stock pressure can satisfy 700 cc/min injectors (at measured flow rate)... (168.45*16.67 (conversion)/4(# of injectors) = 702 cc/min

To calculate the HP at duty cycle: HP = ((injector size in lbs/hr) * ((Number of Injectors) * (Duty Cycle ~0.8)))/(BSFC ~0.6)

So plugging numbers... HP = ((700/10.5)*4*0.8)/0.6) = 355.6 hp .... based on the following assumptions, Duty cycle of 80% and BSFC of 0.6 which usually ranges from 0.6 to 0.65 for turbo charged cars.

 

[93laserAWD]

thanks for all the input.

Goal: Have a reliable 200 whp car, i just want to get the thing back on the road. Tuning and modding is highly likely down the road.

From what i hear, i think the 14b is my best option. I have a 93 laser and i absolutely love the 14b.

As far as purchasing the 14b and swap kit, any suggestions? i found one website that wanted 600 dollars for the new turbo!

thanks for all the replies and for all the help

-ted

 

[Hideki]

I've never installed a 14B/16G but aren't the modifications required to install a 14B the same for the larger 16G? If that's the case would you pay the extra and get a 16G?

 

[gorf]

I've never installed a 14B/16G but aren't the modifications required to install a 14B the same for the larger 16G? If that's the case would you pay the extra and get a 16G?

The mounting is the same and the intercooler piping is the same.
To get the most out of a 16g you will have to add larger injectors and some way to control them.
But as someone else said, the question is "how much horsepower do you want?" and there is direct corilation, HP = $$$$.

You can get a used 14b for under $200. I picked up a ported 14b, 2g exhaust manifold that I ported and a ported O2 housing for $200. Just a little cheaper than a 16g...