Bump

 

For a cheap way to find out what bends you'll need, you might want to try picking this thing mock-up kit by spectre:

http://www.sfxperformance.com/parts/SPT8810.htm

Don't get the spectre pipes, they're crappy little plastic things. The mock-up kit should give you a good idea of how to route the piping and what bends you'll need, though.

 

Yeah, I got all the bends down. I just need to know, If i have a intercooler where the inlet and outlet are 2.5" what should I do? Since the piping needs to be at least 2.75" won't it be bad to have a ic with 2.5" inlets and outlets. That would restrict air flow.... am i right?....
And another intercooler i'm looking at has 3" inlets and outlets... Same question.. if the piping is 2,75" then what should i don about the 3" inlets? Should i just put a reducer on the 3" inlets/outlets and go with 2.75" piping?

Simply put, should I get a intercooler with 2.5" inlets or a intercooler with 3" outlets? because i have not seen a single ic with 2.75" inlets...
And i should go with 2.75" ic piping right?

 

Thats desired.

 

I am running a custom intercooler with 2.5 inch inlets and outlets. I ran 2.5 inch aluminum piping from ebay that i welded with a mig welder. Not as pretty as tig but functional and decent enough for my use. I don't think that it will make a huge difference what size piping you go with. I saw some dyno results of different intercooler piping sizes and it showed the 2.5 inch actually put out more power then 3 " in that particular case. It was speculated that maybe it allowed more heat to be pulled out from the intercooler due to the charge flowing though the intercooler slower from less flow. Idk i don't think it makes a huge difference either way. My setup works very well though.

 

Really? So you are running 2.5"? Isn't that too small? That's smaller than the stock size. How did that fit to your turbo? Because the pipe from the turbo is 2.75"... Did you put a reducer? Well if you say that 2.5 is enough than i guess it's enough.... I will look at my options and see what I can come up with.

 

My turbo has a 2.5" outlet so i just used a silicone 90. I didn't need any reducers. My intercooler also has 2.5" inlets and outlets. The whole system will only flow as much as the smallest section will allow. Since the turbo outlet is 2.5" i made the rest of the system the same to match. I don't know if there would have been an advantage to running 3" intercooler and pipes or not. The way i wanted to run my pipes i didn't have room for 3". If i chose to run 3" it would have taken alot more piping and a less direct route. So i figured the smaller piping would improve flow and response with it not needing to go as far and taking up less volume. I also have very few bends. I have a feeling there is more of an advantage to larger piping if you have alot of bends. It's one of those things that is hard to test because every car is different and changing piping for back to back tests isn't easy. Even if testing proved one way or the other on one car, that doesn't mean the results will be the same for another car. I have a feeling any gains to be found are rather small between 2.5 and 3" piping. Just try to make it as direct as possible with smooth bends.

 

Al right. I see what ur saying. are you running the stock turbos? Im running stock turbos and i was told that they have a 2.75" outlet. ****, i shud just go and check for myself huh?... my car is at the shop right now so i didnt feel like driving all the way there to check it out.... lol guess it wud be better to check it out. But ok.. Thanks a lot for the help. I will see what my options are and i will make the best possible setup with those options. =D but yeah, i see what ur saying, that there would probably will be very little or no difference between larger and smaller piping... So i guess it wont really matter.... I was worried that it wud make a big difference but i guess not.

 

I'm running a single turbo. I think the more bends you have the bigger difference larger pipes will make