Anyone using Greddy Ti-C?
Oct 22, 2008, 06:33 AM
#31
Some manufacturers would "taper", or reduce the size of the piping at the cat to better bolt up. This causes a restriction reducing power potential. A lot of the "JDM" manufacturers used to do this. Obviously you want something that is a full 3" all the way through from cat flange to tip for power production. Otherwise you just have a sound amplifier that looks cool.
So does the new Greddy exhausts still taper?
So does the new Greddy exhausts still taper?
Last edited by Zeus; Oct 22, 2008 at 06:35 AM.
Oct 22, 2008, 06:52 AM
#33
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Please stop spreading the rumors of Taper robbing power. If someone can show me a dyno graph of identical exahaust, with one having the small taper at the cat, and show a significant drop in power I will shut my mouth... but the "power" robbing effects are so small it's not worth mentioning.
Yes, straight and true 3" is the absolute best, but the difference in my opinon is so small it's not even worth bringing up in a discussion.
I know there are a lots of people, that in IMO have wasted there time and money to cut out the small taper and weld in 3"... ask them if it maid a significant difference?
Yes, straight and true 3" is the absolute best, but the difference in my opinon is so small it's not even worth bringing up in a discussion.
I know there are a lots of people, that in IMO have wasted there time and money to cut out the small taper and weld in 3"... ask them if it maid a significant difference?
Oct 22, 2008, 09:07 PM
#35
Please stop spreading the rumors of Taper robbing power. If someone can show me a dyno graph of identical exahaust, with one having the small taper at the cat, and show a significant drop in power I will shut my mouth... but the "power" robbing effects are so small it's not worth mentioning.
Yes, straight and true 3" is the absolute best, but the difference in my opinon is so small it's not even worth bringing up in a discussion.
I know there are a lots of people, that in IMO have wasted there time and money to cut out the small taper and weld in 3"... ask them if it maid a significant difference?
Yes, straight and true 3" is the absolute best, but the difference in my opinon is so small it's not even worth bringing up in a discussion.
I know there are a lots of people, that in IMO have wasted there time and money to cut out the small taper and weld in 3"... ask them if it maid a significant difference?
Next thing you know there is going to be some idiot telling people "some back pressure is good..." Garrett quashed that too a LONG time ago.
HOWEVER, all I asked was are the Greddy's still tapered at the cat... guess so, yes?
Oct 23, 2008, 10:35 AM
#38
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You do the search... this was quashed a LONG time ago along with the 2.5" vs. 3" downpipe crap. The full 3" system made more power on the dyno front to back with a stock turbo from a 2003 or 2004. Any tapers will choke down the power. If you're the kind of Evo owner who only runs a catback and a "filter", sure there would be no problem.
Next thing you know there is going to be some idiot telling people "some back pressure is good..." Garrett quashed that too a LONG time ago.
HOWEVER, all I asked was are the Greddy's still tapered at the cat... guess so, yes?
Next thing you know there is going to be some idiot telling people "some back pressure is good..." Garrett quashed that too a LONG time ago.
HOWEVER, all I asked was are the Greddy's still tapered at the cat... guess so, yes?
And yes I have done the research and as I mentioned, as well as you did, there are power gains, but in most cases (the catback filter and guy you mentioned) it's a wash. Maybe I make 300hp with a tapered exhaust and you make 311hp with your non-tapered exhasut.... it all depends on what you are willing to pay for, and what you expect to get in return.
Oct 24, 2008, 05:33 AM
#41
Evolving Member
why don't you het a stainless downpipe + the whole pipe done at the shop in Modra as I told you - and just buy the muffler if you insist in something titanium polished ??
Oct 24, 2008, 07:21 AM
#42
Yes, it does taper...
And yes I have done the research and as I mentioned, as well as you did, there are power gains, but in most cases (the catback filter and guy you mentioned) it's a wash. Maybe I make 300hp with a tapered exhaust and you make 311hp with your non-tapered exhasut.... it all depends on what you are willing to pay for, and what you expect to get in return.
And yes I have done the research and as I mentioned, as well as you did, there are power gains, but in most cases (the catback filter and guy you mentioned) it's a wash. Maybe I make 300hp with a tapered exhaust and you make 311hp with your non-tapered exhasut.... it all depends on what you are willing to pay for, and what you expect to get in return.
Back to the Greddy...
Last edited by Zeus; Oct 24, 2008 at 07:23 AM.
Oct 25, 2008, 12:48 PM
#43
I am one of those guys that will spend the extra money to get the 2.5in piece cut out. Buy Vibrant 3in SS flange, source some 304SS, then pay I good welder $50-60. Makes it a $600 exhaust...my Works is too damn quiet even with a testpipe, almost sounds stock 
Oct 25, 2008, 01:46 PM
#44
Evolving Member
thats crazy,,,im just asking,,,not big deal.
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