Calling up Exhaust experts & Turning/fab experts
#16
#17
Rennlist Member
If you tie in to close, it creates turbulence, and that creates back pressure; which then almost doubles in front of the turbine (where it really matters).
If I read the thread carefully enough it seems you haven't tried a little dump muffler, yet. (Or, did I miss that) Why don't you see what that sounds like, first.
(I know you made up your mind, but just sayin')
#18
Professional Hoon
Rennlist Member
Rennlist Member
Thread Starter
Join Date: Jan 2010
Location: Melbourne, Australia
Posts: 7,090
Likes: 0
Received 4 Likes
on
4 Posts
You are kinda answering your own question.
If you tie in to close, it creates turbulence, and that creates back pressure; which then almost doubles in front of the turbine (where it really matters).
If I read the thread carefully enough it seems you haven't tried a little dump muffler, yet. (Or, did I miss that) Why don't you see what that sounds like, first.
(I know you made up your mind, but just sayin')
If you tie in to close, it creates turbulence, and that creates back pressure; which then almost doubles in front of the turbine (where it really matters).
If I read the thread carefully enough it seems you haven't tried a little dump muffler, yet. (Or, did I miss that) Why don't you see what that sounds like, first.
(I know you made up your mind, but just sayin')
Well with the rules in Australia, and the police cracking down harder then ever with mods, and just being over the dump all together, i want to tie it back in. I haven't tied it in on the 3" yet. But at the moment i have 2 mufflers and it's 102 db while the standard limit is 89db. The WG muffler will still be loud compared to the 2 mufflers i've got now. Most people run 1 muffler anyway.
#19
Race Car
One of these things I used to know, but can't recall. I believe that it may have to do with the temperature of the exhaust gas. As it travels rearward, it cools. As it cools, it contracts, and the pressure reduces. So by tying it back in further back, you are doing so in a lower pressure portion of the exhaust system, which will impact the performance less than a high pressure region.
#20
Three Wheelin'
Join Date: Feb 2007
Location: Indianapolis,IN
Posts: 1,408
Likes: 0
Received 0 Likes
on
0 Posts
I got poo-poo'd for suggesting in a previous thread that I couldn't see how the 951 tie in vs dump could make a measurable difference.
I haven't seen a dyno chart on here that proves either way, but as mentioned in your first post, many claim no difference, and some claim big losses. I just don't buy the big losses. Some even claim gains. I might buy into losses on a dyno queen or 500HP monsters, but still not convinced. A street car with a tie in tube thats 3 feet long is another animal.
I would agree a little spool is sacrificed.
Anyone else read 100s of pages of material only to be a little "on the fence"?
I haven't seen a dyno chart on here that proves either way, but as mentioned in your first post, many claim no difference, and some claim big losses. I just don't buy the big losses. Some even claim gains. I might buy into losses on a dyno queen or 500HP monsters, but still not convinced. A street car with a tie in tube thats 3 feet long is another animal.
I would agree a little spool is sacrificed.
Anyone else read 100s of pages of material only to be a little "on the fence"?
#21
Professional Hoon
Rennlist Member
Rennlist Member
Thread Starter
Join Date: Jan 2010
Location: Melbourne, Australia
Posts: 7,090
Likes: 0
Received 4 Likes
on
4 Posts
My VE has been increased quite a bit on my engine with the head and cam. My intake had also been honed.
I tied it in today after work. Boy now it's a challenge putting the rear exhaust back on. I'll probably need to ad more Vbands to make my exhaust come apart in more sections to make it easier to work on if needed.
All i can say is it's extremely quiet now on boost. Not use to it. Almost sounds stock so to speak. I can now feel it kick with out a noise. For some reason it feels like it kicks more. Probably not though.
Here's a ****ty picture of what i did.
I tied it in today after work. Boy now it's a challenge putting the rear exhaust back on. I'll probably need to ad more Vbands to make my exhaust come apart in more sections to make it easier to work on if needed.
All i can say is it's extremely quiet now on boost. Not use to it. Almost sounds stock so to speak. I can now feel it kick with out a noise. For some reason it feels like it kicks more. Probably not though.
Here's a ****ty picture of what i did.