Installation Chronicle part deux: CFM Intake, Kooks LT Headers, Hi Flow Green H Pipe
#41
Roush Forum Stalker
So nice,...yet so nasty sounding! \m/ (I mean that in a good way!) Awesome car Burton. Sidepipes for the win!
#43
I Have No Life
Thread Starter
The biggest thing was going to the 3/8" restrictor plates. (pasting this from my other response) So yes, the restrictor plates do in fact reduce sound levels - they reduce air flow (therefore sound) out the sides. Before, the sides were WIDE open, no restriction. So, since my Corsas were still "mufflers" they had restriction. As we know from fluid dynamics, things take the path of least resistance. So the flow was completely coming out the sides, and it actually felt a tad more sluggish at low rpms. (To add insult to injury, I couldn't full utilize my hp gain in the upper rpm band because I couldn't take it that high for obvious audible reasons).
Thus I had 3/8" restrictor plates fabbed up, and sandwiched in the flange opening - much like the stock Boss 302 and its stock restrictor plates. Imagine, I reduced the flow/sound by a crazy 81.25%!!! (wide open was 2" opening). I mean I love loud, but when I got it out of the shop it was ridiculously loud. And I knew that a) the cops would find me, b) I couldn't enjoy my car because I couldn't rev it up (safely) that high, therefore c) I lost power in the lower rpm range where I drive most of the time.
The new plates are PERFECT. I got more torque down low, plus up high, I can feel (butt dyno) that added 25 to 30whp or so, additional pull from before. Can't wait to get it dyno'd again.
Last edited by FromZto5; 5/23/16 at 09:36 AM.
#45
I Have No Life
Thread Starter
Originally Posted by 5.M0NSTER
Wow, that sounds mean. Well done. The pop during the in gear coast down has an interesting note to it.
Speaking of which, reminds me I have to sell my Borla x pipe now! No longer need since I'm kooks from headers back. Anyone interested before I post in on the for sale section?
#47
I Have No Life
Thread Starter
Btw, to your question earlier - I don't need a new tune because my tuner already gave me the tune last year with the provisions intact for the headers and O2 sensor relo's.
In fact, I just datalogged the new setup, sent them in, reviewed them and they gave me the thumbs up that all was perfect. So I'm good to go. I reset the ECU though, so it can learn the new setup.
#48
I Have No Life
Thread Starter
Had to update this thread with a few changes. Corsas are now for sale, and here's a few pics and a vid of the new setup. Wanted a change... had the Corsas on for almost 2 years.
Last edited by FromZto5; 8/21/16 at 04:52 PM.
#49
Roush Forum Stalker
Sounds great Burton!
Enjoy.
Enjoy.
Thread
Thread Starter
Forum
Replies
Last Post
roushcollection
Auto Shows and Events
0
7/28/15 02:08 PM