J's header vs Hytech long tube S/C header
Thread Starter
Joined: Sep 2005
Posts: 1,941
Likes: 47
From: Baraboo, WI
Results...
So we (RAIN H8R and myself) re-installed the NEW re-built mid-pipe in 2.5" (from the previous 2.75") and also with the vibrant "Ultra Quiet" resonator. For reference, the previous Fujitsubo Legalis R was at a peak of 92.6 DB between 3,000 RPM and 4,500 RPM. The 2.75 inch Hytech with the bottle style resonator peaked at 101 DB in the same range. Upon preliminary testing of the newly rebuilt unit, it peaked at 99.5 DB in the same range. However, it did move the drone toward the lower end of that range thus being the most "droney" (if that is a word) at about 3,000 RPM.
Overall, the sound is much more refined and smoother. However, because of the overall level of drone at 3,000 RPM (which really is not that bad), for me due to having the Fujitsubo at the same time, I have decided that it is just to much for ME...or maybe I am just being too picky.
No further dyno testing will result due to this, therefore this Hytech Twinloop exhaust will be in the for sale section shortly.
Thank you,
Brian
So we (RAIN H8R and myself) re-installed the NEW re-built mid-pipe in 2.5" (from the previous 2.75") and also with the vibrant "Ultra Quiet" resonator. For reference, the previous Fujitsubo Legalis R was at a peak of 92.6 DB between 3,000 RPM and 4,500 RPM. The 2.75 inch Hytech with the bottle style resonator peaked at 101 DB in the same range. Upon preliminary testing of the newly rebuilt unit, it peaked at 99.5 DB in the same range. However, it did move the drone toward the lower end of that range thus being the most "droney" (if that is a word) at about 3,000 RPM.
Overall, the sound is much more refined and smoother. However, because of the overall level of drone at 3,000 RPM (which really is not that bad), for me due to having the Fujitsubo at the same time, I have decided that it is just to much for ME...or maybe I am just being too picky.
No further dyno testing will result due to this, therefore this Hytech Twinloop exhaust will be in the for sale section shortly.
Thank you,
Brian
Thread Starter
Joined: Sep 2005
Posts: 1,941
Likes: 47
From: Baraboo, WI
Hi all;
I have the twin loop now up for sale in the classifieds...
https://www.s2ki.com/s2000/topic/101...#entry22453002
Thanks, Brian
I have the twin loop now up for sale in the classifieds...
https://www.s2ki.com/s2000/topic/101...#entry22453002
Thanks, Brian
Community Organizer
Joined: Jun 2007
Posts: 31,070
Likes: 566
look at the boost carefully when changing exhaust parts on a supercharged car.
alot of times the boost will drop and you will see a drop in power. speed the blower up to make the same boost you had before and you will pick up power.
even a 1/2 psi can make a huge difference with a blower.
alot of times the boost will drop and you will see a drop in power. speed the blower up to make the same boost you had before and you will pick up power.
even a 1/2 psi can make a huge difference with a blower.
Examine what you said here logically. It doesn’t make any sense. Consider that the blower has an rpm limit/ceiling, which is a fundamental problem to your strategy, its fixed on what it can put out, so speeding the blower up to compensate for a drop in exhaust efficiency/output is counter productive wouldn’t you say? Your steeling one to give to the other. To throw salt on the wound, the faster you spin the blower, the more heat it produces, effectively diminishing its productivity. I think the goal here is to make the most power at the lowest blower speed, or the speed in which you choose to run, whether that’s at 70% or 100% rpm duty. If you’re seeing a drop in pressure and power on a particular exhaust for the given blower speed, then that isnt the right exhaust to be running.
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