# SR20DET FMIC Piping? **URL:** \ **Category:** Canada Nissan Automotive\ **Created:** [September 29, 2006, 5:16pm UTC](https://forums.speedlife.net/t/sr20det-fmic-piping/144485 "2006-09-29T17:16:02Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![lourens13](https://avatars.discourse-cdn.com/v4/letter/l/e19b73/32.png) [@lourens13](https://forums.speedlife.net/u/lourens13)\ **Post date:** [September 29, 2006, 5:16pm UTC](https://forums.speedlife.net/t/sr20det-fmic-piping/144485/1 "2006-09-29T17:16:02Z")
On an SR running a T25, what would be a decent size for the IC piping? Ive heard 3" would cause too big of a drop in pressure? Is this true, or? ---
**Author:** ![imported\_silvia](https://avatars.discourse-cdn.com/v4/letter/i/e79b87/32.png) [@imported\_silvia](https://forums.speedlife.net/u/imported_silvia)\ **Post date:** [September 29, 2006, 5:23pm UTC](https://forums.speedlife.net/t/sr20det-fmic-piping/144485/2 "2006-09-29T17:23:59Z")
yeah, 3" would be huge for “normal” power levels(200hp-400hp) I think greddy kits have 1 3/4" hot pipes, and 2.5" cold pipes? something like that anyway. if you go too big you loose pressure and air velocity(torque). ---
**Author:** ![GRIPPY](https://avatars.discourse-cdn.com/v4/letter/g/ad7895/32.png) [@GRIPPY](https://forums.speedlife.net/u/GRIPPY)\ **Post date:** [September 29, 2006, 5:30pm UTC](https://forums.speedlife.net/t/sr20det-fmic-piping/144485/3 "2006-09-29T17:30:52Z")
I went with 2 inch on hot and cold pipes and it has been working great for me at 12 psi. ---
**Author:** ![RS13](https://avatars.discourse-cdn.com/v4/letter/r/46a35a/32.png) [@RS13](https://forums.speedlife.net/u/RS13)\ **Post date:** [September 29, 2006, 5:52pm UTC](https://forums.speedlife.net/t/sr20det-fmic-piping/144485/4 "2006-09-29T17:52:16Z")
Pm’s ya back. Just make the transitions smooth. Cold side on my greddy kit is 2.25, hot is 3 ---
**Author:** ![lourens13](https://avatars.discourse-cdn.com/v4/letter/l/e19b73/32.png) [@lourens13](https://forums.speedlife.net/u/lourens13)\ **Post date:** [October 2, 2006, 8:17pm UTC](https://forums.speedlife.net/t/sr20det-fmic-piping/144485/5 "2006-10-02T20:17:50Z")
> [@GRIPPY](#): > > I went with 2 inch on hot and cold pipes and it has been working great for me at 12 psi. What kind of kit do you have? Or is it custom made? If so, who made it? ---
**Author:** ![Nis240](https://avatars.discourse-cdn.com/v4/letter/n/a9a28c/32.png) [@Nis240](https://forums.speedlife.net/u/Nis240)\ **Post date:** [October 2, 2006, 8:44pm UTC](https://forums.speedlife.net/t/sr20det-fmic-piping/144485/6 "2006-10-02T20:44:19Z")
2’’ and 2.5 would be best for response. Im kinda regretting having gone 2.5 and 3…I hate the fact full spool come on so late @ 3000RPM. ---
**Author:** ![TyPhOOn](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/typhoon/32/5800_2.png) [@TyPhOOn](https://forums.speedlife.net/u/TyPhOOn)\ **Post date:** [October 3, 2006, 7:13am UTC](https://forums.speedlife.net/t/sr20det-fmic-piping/144485/7 "2006-10-03T07:13:52Z")
> [@Nis240](#): > > 2’’ and 2.5 would be best for response. Im kinda regretting having gone 2.5 and 3…I hate the fact full spool come on so late @ 3000RPM. GO NA … dont worry about late spool or even supercharge it … turbo lag like 3,000rom is not bad at all dude … that is like stock on sr20/ca ---
**Author:** ![Variable](https://avatars.discourse-cdn.com/v4/letter/v/cab0a1/32.png) [@Variable](https://forums.speedlife.net/u/Variable)\ **Post date:** [October 3, 2006, 7:16am UTC](https://forums.speedlife.net/t/sr20det-fmic-piping/144485/8 "2006-10-03T07:16:31Z")
Take a look at the exit of the compressor side of your turbo… then think about how big a pipe you should use. 😛 ---
**Author:** ![Jason\_Lange](https://avatars.discourse-cdn.com/v4/letter/j/65b543/32.png) [@Jason\_Lange](https://forums.speedlife.net/u/Jason_Lange)\ **Post date:** [October 4, 2006, 11:05pm UTC](https://forums.speedlife.net/t/sr20det-fmic-piping/144485/9 "2006-10-04T23:05:09Z")
No bigger than 2.5" for sure. I usually go 2" hot and 2.5" cold. I can do it all for you if you want.