1.6 Greddy Intercooler Piping Size
#1
1.6 Greddy Intercooler Piping Size
Hey Fam,
I was wondering what size intercooler do you guys recommend for the stock greddy setup. This past xmas my Girl friend got me a 2.5" intercooler piping kit from ebay, now I know this is not the best quality but cant get mad at her for trying to get me something for my car. I have done some reading and researching and I see there are mixed people using both the 2" and 2.5" interooler piping as well as routing. My question is will the 2.5 be too large for my greddy setup with timing set back at 6 degrees. The car already has decreased low end and I was wondering how much more lag it will have when adding an intercooler. Im pretty sure theres a possiblity I can increase timing just a bit due to cooler air being fed. Let me know what your advices are,thanks.
Jun
I was wondering what size intercooler do you guys recommend for the stock greddy setup. This past xmas my Girl friend got me a 2.5" intercooler piping kit from ebay, now I know this is not the best quality but cant get mad at her for trying to get me something for my car. I have done some reading and researching and I see there are mixed people using both the 2" and 2.5" interooler piping as well as routing. My question is will the 2.5 be too large for my greddy setup with timing set back at 6 degrees. The car already has decreased low end and I was wondering how much more lag it will have when adding an intercooler. Im pretty sure theres a possiblity I can increase timing just a bit due to cooler air being fed. Let me know what your advices are,thanks.
Jun
#5
Cpt. Slow
iTrader: (25)
Join Date: Oct 2005
Location: Oregon City, OR
Posts: 14,192
Total Cats: 1,135
2.5 is fine, it looks beefy and I doubt you'd notice the difference.
The bigger change for you is going to be switching your wastegate signal source to as close to the throttle body as possible, thank me later.
The bigger change for you is going to be switching your wastegate signal source to as close to the throttle body as possible, thank me later.
#7
Say total piping is about 4 feet.
2" diameter pipe roughly has
PR^2x48
3.14x1x1x48 = 150ci
2.5" pipe
3.14x1.25*1.25*48 = 235ci
Difference in volume 85ci
a 1.6 at 7k rpm flows about 170cfm
Add 6psi of boost to that so you'll increase it to 200cfm
85ci to cubic feet is 0.0491898cf
200cfm=3 1/3 cfs
3 1/3= .0491
1 = x
x= .01473
So theres ur answer, the difference in spool at 7k rpm is .0147 of a second.
Since you wont be spooling up at redline lets add something more valid such as half of that at 3.5k rpm. So say 100cfm
100cfm=1 2/3cfs
1 2/3 = .0491
1 = x
x=.0294
At 3.5k rpm you'll spool with .0294s slower with the bigger piping.
Looking at those numbers the only benefit i see with going with smaller piping is the ease of making it fit.
2" diameter pipe roughly has
PR^2x48
3.14x1x1x48 = 150ci
2.5" pipe
3.14x1.25*1.25*48 = 235ci
Difference in volume 85ci
a 1.6 at 7k rpm flows about 170cfm
Add 6psi of boost to that so you'll increase it to 200cfm
85ci to cubic feet is 0.0491898cf
200cfm=3 1/3 cfs
3 1/3= .0491
1 = x
x= .01473
So theres ur answer, the difference in spool at 7k rpm is .0147 of a second.
Since you wont be spooling up at redline lets add something more valid such as half of that at 3.5k rpm. So say 100cfm
100cfm=1 2/3cfs
1 2/3 = .0491
1 = x
x=.0294
At 3.5k rpm you'll spool with .0294s slower with the bigger piping.
Looking at those numbers the only benefit i see with going with smaller piping is the ease of making it fit.
Thread
Thread Starter
Forum
Replies
Last Post