True Duals vs. Y
This is a discussion on True Duals vs. Y within the External Engine forums, part of the LSx Technical Help Section category; Originally Posted by rickssz Just keying on power and not sound did i get it right that true duals vs ...
03-03-2006, 02:43 PM #41Originally Posted by rickssz
the graph is showed was on the wife's car. it has bassani headers, with catted y-pipe and borla 3" adjustable catback. i removed the borla and bassani y-pipe and added the bassani tru-duals. i had to make minor modfication to get it to fit the cats. so, extrapolating from an average gain of 10-15 rwhp when swapping from a stock catback to an aftermarket, you could see 25-30 rwhp from the bassani tru-duals. i'd say about 20 rwhp myself. you can't always compound gains.
03-07-2006, 04:45 PM #42Originally Posted by spazzyfry123
Most racers who run open headers find they get the best times with 18"-24" extensions on the collector for scavenging purposes, I suppose that you'll get close to that putting the cutout after the Y. Too short of a pipe will cost you low end.
03-07-2006, 06:27 PM #43
Gah...I'm so indecisive! I would really like to have true-duals because it appears that they sound better. I don't see that much of a difference in power made between true duals and a Y-pipe, so the choice is mainly for sound. I also enjoy making my car "unique" in a sense, and since the car comes with a Y-pipe design, true duals would go hand-in-hand with the "unique" aspect. This will more than likely be my first modification to the car (Long-tube headers, true-dual exhaust with Sweet Thunder mufflers). I just can't get over the idea that the Y-pipe design wasn't a good idea on GM's part. I have no doubts that it is sufficient and works great, I just believe it is odd that they did that instead of going ahead and going with true-duals.
So I guess I will save up for some coated Pacesetter long-tube headers and the TSP true dual system with Sweet Thunder mufflers dumped before the axle. (I am aware of the drone...my last car was dumped with an off-road H-pipe and the spare change in my cup-holder would get airborne at times just from the vibration of the sound)
On a side note, I have heard that LS1's need backpressure. Would running an off-road application such as this (no cat's) be okay? I may even opt for a couple electric cut-outs to put in right after the header for when I want to get loud. My friend has a 383 stroker LT1 in his '92 'Vette and has essentially done the same thing that I am considering doing...and man does that thing sound mean with the cut-outs open
03-07-2006, 08:14 PM #44Snake EaterGuest
i wouldn't run cutouts on a td system
03-08-2006, 06:25 AM #45Originally Posted by Snake Eater
03-08-2006, 07:26 AM #46Snake EaterGuest
well considering you won't have that much power, the cutout will actually make you lose some power. if you want the sound, i guess go for it though.
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