three inch IC piping with a 16g??

[throwedgsx]

Would it be a bad idea to run 3 inch piping on a 16g setup??

 

[15 sec gs]

you should be fine i dont see any problem with it

 

[turboglenn]

I ran 2.5 with mine and there was no performance loss. The only thing it's going to do is add extra volume to the intake tract. Now the only theory i have on what may be bad is moving that extra volume, but honestly I think you'll be just fine.

I just got a Dejon tool UICP setup from a friend, and have debated putting it on because it's a half inch smaller than what i currently run. BUT, when i measure the inside diameter of the TB elbow it's the exact same as the Dejon piping and since the TB elbow is the same size i really don't see it being a problem. But by theory of Bernoulli's principals of airflow this would be better because there's no sudden change in diameter (and especially with no taper to the smaller ID there could be flow issues, but my car has been fine. Basically what I'm saying is if you study airflow theory/principals you will see where there could be problems, but i don't think there's going to be enough to hurt you significantly.

 

[Boost92awd]

I wouldnt suggest going that big unless you plan on putting a big turbo on it down the road, ex. 35r. Your going to have alittle slower spool up time also. Its also heavier, takes up more room in the engine bay and is harder to install because it involve more cutting than if you were to use 2.5 inch piping. But yes you can use it on a 16g. Theres really no gains of using that big of piping untill you get a big turbo on there.

 

[turboglenn]

Boost92awd raises some great points, things i forgot to say but really he's dead on with the problems you're going to encounter. He's also right about not doing it unles you're planning on a big turbo in the near future

 

[throwedgsx]

The reason i ask this is b/c a guy want to sell me a very big spearco intercooler and he said he would give me the piping with it. But the piping is three inch. I know most people do not run that big of piping, especially on a 16g. I definately think it's overkill but i wanted someone elses opinion. The biggest i would go turbo wise is a 30R and you don't even need 3 inch piping for that. I'll stick with my 2.5

 

[bastarddsm]

It could be beneficial on a FWD, in that the slower spool up time may help with traction issues..

 

[99gst_racer]

It could be beneficial on a FWD, in that the slower spool up time may help with traction issues..

A delay in power may help with traction issues, but a delay in general is not optimal for any type of timed racing.



The rule of thumb is to match your IC piping to the size of your throttle body.

3" is going to hurt more than help. It's more volume for the little 16G to fill, which will create slower spool times. 2.5" (or smaller) will yield better results.

Think of it like this (crude but fitting): Pissing into a 4-foot garden hose, and pissing into a 4-foot sewer pipe. Think of how much time and energy it will take to fill each. And think of which one will transfer quicker and more efficiently.

 

[romeen]

99gst_racer;151448792]A delay in power may help with traction issues, but a delay in general is not optimal for any type of timed racing.

Agreed, better to learn to control traction through throttle modulation then by intentionally delaying onset of boost.

The rule of thumb is to match your IC piping to the size of your throttle body.

Agreed. You don't want the air travelling through piping larger than the diameter of your TB then suddenly hitting a restriction causing disruption of the airflow.

Think of it like this (crude but fitting): Pissing into a 4-foot garden hose, and pissing into a 4-foot sewer pipe. Think of how much time and energy it will take to fill each. And think of which one will transfer quicker and more efficiently.

Depends on how much beer I've drank!

 

[TurboAnything]

I am running 3in piping and have not noticed slower spool i was getting 20psi by 2800rpm with a 20g sized turbo with a 74mm turbine wheel.

 

[talon187]

well ive got a new inake manifold with a mustang throttle body on it and thats the only reason im going to run 3inch piping is because the manifold came with piping that will work good with my bushur race core. but no im not puting it on with my little 16g im eaither geting a 57 trim or a 62-1 and ill put it all on then. your better off with the 2.5 inch piping for the 16g

 

[1gDSM4g63]

I have my car all setup and this topic has been a the back of my mind for some time. I have a Q45 80mm throttle body with a JM Fab SMIM but still have 2.5" IC piping. Would it make a significant gain to switch to 3" piping and not to mention a core with 3" outlets?

 

[ceedawg]

I have my car all setup and this topic has been a the back of my mind for some time. I have a Q45 80mm throttle body with a JM Fab SMIM but still have 2.5" IC piping. Would it make a significant gain to switch to 3" piping and not to mention a core with 3" outlets?

Buschur has a thread where the 2.5" pipe with a 3" throttle body performed a lot better than 3" piping with the same 3" throttle body all around on a GT35r setup.

I will find it and post it.

 

[1gDSM4g63]

Buschur has a thread where the 2.5" pipe with a 3" throttle body performed a lot better than 3" piping with the same 3" throttle body all around on a GT35r setup.

I will find it and post it.

Hmmm... that never came to my mind. I thought with a 3" throttle body and 2.5" piping it would choke or be inconsistent air flow.

 

[T9S1i]

i dont think it would choke it if its going from 2.5" and it opens up to 3" then into the IM plenum. The other way around would be all bad. 3" piping to a 2.5" TB would choke things down.

 

[NewTurboTuner]

It wouldnt be a bad idea to run 3" IC pipes, but it wouldnt really be a good idea either.

I don't think it would make much performance change at all.
It might look nicer, but thats abou it.

I won't switch to 3" IC for awhile; even at 500+whp.
I think the $$$ is better spent elsewhere

 

[1gDSM4g63]

It wouldnt be a bad idea to run 3" IC pipes, but it wouldnt really be a good idea either.

I don't think it would make much performance change at all.
It might look nicer, but thats abou it.

I won't switch to 3" IC for awhile; even at 500+whp.
I think the $$$ is better spent elsewhere

Agree, that was at the back of my mind. However I just cannot think of other mods and if switching IC pipe would make that much difference I'd think about it.

 

[NewTurboTuner]

3" IC pipes would help if everything else was 3".
.....like 3" Turbo Compressor outlet, intercooler with 3" inlet/outlet, 3" GM MAF or No MAF at all, and 3" Throttle body)

I think the 16g has a 1.75" outlet? Most big(er) turbos have 2.5" compressor outlets. I don't think Turbo's have 3" outlet until you go GT42. Also a stock Throttle Body is even smaller than 2.5 inch.

 

[DSMunknown]

The rule of thumb is to match your IC piping to the size of your throttle body.

And this is why I wonder why people stick with the 2G TB elbow and try porting it to match the 1G TB while the beginning of the elbow is still at 54mm.

 

[ceedawg]

3" IC pipes would help if everything else was 3".
.

Buschur has proven quite the opposite! Have you tested a 3" setup?

I don't know bro but I would not speculate unless I've personally proven it. Most of the Buschur cars are using 2.5" intercooler piping. Cars have lost power all thru the rpm range using 3" pipe on a particular test he did but I'm having a hard time fndig it. 3" would be even worse on 16g.

 

[andy4g63]

Buschur has proven quite the opposite! Have you tested a 3" setup?

I don't know bro but I would not speculate unless I've personally proven it. Most of the Buschur cars are using 2.5" intercooler piping. Cars have lost power all thru the rpm range using 3" pipe on a particular test he did but I'm having a hard time fndig it. 3" would be even worse on 16g.

x2 !!!

Ceedawg is absolutely right. There is this white EVO built and tuned by Turbotrix, last year the guy ran 9.2 on stock 60mm TB and 2.5" IC piping with GT42R.

 

[talon187]

ive said this before its way to much air for such a small turbo. i ran a big 16 and yes it worked great and made nice power but 3 inch is just to much like i said before im running 3inch just for on side of the intercooler and im wondering if its alittle muchl. the only reason im running is because i got the manifold with a 75mm throttle body and it had this piping with it...im wondering if i run 2.5inch and then a reducer cupler at the thottle body if it the air wont be free flowing or not if you guys know what i mean...if your going to be running a big turbo then it will work ok but your going to notice aolot fo lag on my motor my 16g was hiting 23psi by 300-3200 rpm and my motors not stcok but good luck

 

[1gDSM4g63]

x2 !!!

Ceedawg is absolutely right. There is this white EVO built and tuned by Turbotrix, last year the guy ran 9.2 on stock 60mm TB and 2.5" IC piping with GT42R.

60mm = 2.36" what about 80mm tb and 3" IC pipe on a bigger turbo?

Is there any proof stating the fact the 2.5" does better than a 3." Having 3" tb and 2.5" IC pipe seem like quite a lot of restriction.

 

[DSMunknown]

60mm = 2.36"

Yeah, but the extra .14 inches won't make much of a noticeable difference.

 

[romeen]

A friend has a Phd in fluid dynamics. I was picking his brain and asked him if 2" i.d. piping would be a restriction if flowing 36 lb/min of air. He did the math and said it wasn't even close to being a restriction (when the air velocity reaches the speed of sound).

I don't have objective data to prove that 2 or 2.5" piping yields better results than 3" but intuitively it seems to me that the smallest piping that doesn't cause disruption of flow would be best. (?)

We all know that intake air velocity through the intake ports/valves is extremely important for power production. I wonder if the velocity of the air before it arrives at the intake ports has any impact on the final velocity as it travels through the intake ports?