14b or 16g on new rebuilt motor?

[NAHBAL97]

Ok, I am rebuilding my 97 gst motor and it is also time to change the turbo do to some, ok a lot of shaft play.:thumbdown And since I am a strong Gemini, I can't figure out if I should get a 14b or a 16g. I am not planning on racing my car... anymore for a long time. I did that before, and now I am paying for it. BUT, since I have to replace the turbo, I want to upgrade just a little. i need some info on what you think would be my best choice... 14b? or 16g at low boost? I say at low boost because this is my daily driver... when it is drivable. and also because I heard (not sure if it is true) that If I get a 16g and not boost it up so high, it will last longer than if I get a 14b and run it at a higher boost. I ran my T-25 at about 14/15 psi on a normal basis. So if anyone has any suggestions, I would greatly appreciate it. Thank a lot. oh ya, and if anybody knows where i can find rebuilt turbos, please let me know that too

 

[kpt4321]

At 15 psi, the 14b and 16g aren't going to be much different, especially on a less modded car.

 

[NAHBAL97]

Really? i figured that i wouldn't have to run th 16g at as high of boost to equall a 14b at high boost. So my best bet is just to get the 14b? And the 14b goes on fine without any mods, except the oil line right? Damn, I sound like I don't know anything about my car, but i swear, I really do. I just want to make the right decision, ya know

 

[Groomz]

Originally posted by NAHBAL97
Really? i figured that i wouldn't have to run th 16g at as high of boost to equall a 14b at high boost. So my best bet is just to get the 14b? And the 14b goes on fine without any mods, except the oil line right? Damn, I sound like I don't know anything about my car, but i swear, I really do. I just want to make the right decision, ya know

At a specific psi and rpm ( and at the same inlet air temp ), the motor is only capable of ingesting so much air. With higher boost equals less volume and more air can be ingested.

So at 15psi, lets say the motor can only get 400cfm's into it ( just an example ). The 14b is capable of flowing that much, so a 16G would not see any gains at the same boost and atmospheric conditions. Switching to a different turbo with a more efficient wheel design at the same psi would yield a cooler outlet charge ( which is denser ) and more power.

14b's kick ass.

 

[yo2001]

When I rebuilt my motor, I went straight to EVOIII 16G and Crowers stage I cams etc. (all listed on my profile) Been real happy with it. If you are going to want to go fast, I would go head and do it. I hate to do the mods twice. my 2 cents.

 

[NAHBAL97]

Thanks everyone. I think my best be is to get a 14b. I just can't find anywhere that sells them. I can find like 500 used 14b's with like 100k on them, or ones rebuilt by someones' friends brother!! Does anyone know any good sites or shops that I can order one from? I don't really know of anywhere local (Seattle/Tacoma, WA). Thanks again

 

[kpt4321]

Originally posted by Groomz
At a specific psi and rpm ( and at the same inlet air temp ), the motor is only capable of ingesting so much air. With higher boost equals less volume and more air can be ingested.

So at 15psi, lets say the motor can only get 400cfm's into it ( just an example ). The 14b is capable of flowing that much, so a 16G would not see any gains at the same boost and atmospheric conditions. Switching to a different turbo with a more efficient wheel design at the same psi would yield a cooler outlet charge ( which is denser ) and more power.

14b's kick ass.

You're contradicting yourself.

You said that the 16g would not see any gains, and then you said that a more efficient wheel would yeild more power.

The 16g is a more efficient wheel than a 14b, and therefore it has the capability of gaining more power. However, at 15 psi of boost the difference between the two turbos is so small that you're talking about a difference of under 10 horsepower. Certainly not worth the cash!



Don't buy a new 14b, just buy a used one in good shape.

 

[Groomz]

Originally posted by kpt4321
You're contradicting yourself.

You said that the 16g would not see any gains, and then you said that a more efficient wheel would yeild more power.

The 16g is a more efficient wheel than a 14b, and therefore it has the capability of gaining more power. However, at 15 psi of boost the difference between the two turbos is so small that you're talking about a difference of under 10 horsepower. Certainly not worth the cash!



Don't buy a new 14b, just buy a used one in good shape.

Understanding I can do. Explaining is another ballpark.

You hit the nail on that one. That's what I wanted to say. The 16G is more efficient, but the gains would only be seen past 16-18psi.

 

[kpt4321]

Right on.