open borla vs. open cutout?
open borla vs. open cutout? i cant remember where i read this and i cant find it again. but it seems like i read that having longtubes, ory, and a borla catback with no plate was almost the same as having lt's, ory, and an open cutout. is that true? just wondering for my own personal knowledge.
If you take the tip off on the passenger side it gets a good bit louder. I ran no plate with hooker LTs and a ORY, car got tons of compliments from people. I have cats now, still no plate.
TECH Apprentice
Joined: Jun 2007
Posts: 313
Likes: 0
with an open borla the direction of the flow path would be straight out before entering the muffler.if its closed it sends it through the muffler. so if you ran a different muffler with a cutout before the muffler it would be the same setup. go for the sound that you want
Coming from a person that used to have an open cutout, its a totally different sound. The Borla sounds way different than a open cutout, even at wot the sound is different. Im not sure about hp differences but I sure sa hell like my open plate Borla over my cutout.
Cutout:
View Video on FQuick
Open plate Borla:
View Video on FQuick
Cutout:
View Video on FQuickOpen plate Borla:
View Video on FQuick Coming from a person that used to have an open cutout, its a totally different sound. The Borla sounds way different than a open cutout, even at wot the sound is different. Im not sure about hp differences but I sure sa hell like my open plate Borla over my cutout.
Cutout:
View Video on FQuick
Open plate Borla:
View Video on FQuick
Cutout:
View Video on FQuickOpen plate Borla:
View Video on FQuickTrending Topics
TECH Senior Member
iTrader: (1)
Joined: Apr 2005
Posts: 8,807
Likes: 0
From: Vancouver,[KITSILANO].B.C. Canada *WestCoast*
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
Five Reasons the Camaro Was the Most Pivotal Player in the Pony Car Wars 2.0
Brett Foote
10 Reasons the LS7 Is GM's Most Extreme Naturally Aspirated V8 Engine Ever
Verdad Gallardo
MeanLT1 and Racin96 are dead-on, they sound nothing alike and performance depends, if you mean by ORY (pre-axle) mounted (single cutout) ...ehhh it'd be very minimal performance wise on a dyno. If you were talking about dual cutouts mounted post-LTs then you could bump up the rwhp about 13 and torque around 11-12 with a bolt-on stock for the most part cammed LTXX. The sound with dual cutouts are ear-blistering...just ask BIZZATCH ...lol..he knows 
My exhaust setup was as follows... 1-7/8" SS KooK's headers, 3" stainless Y-pipe with no cats and dual 3" electric cut-outs about 10"-12" from the collector, Borla with no plate. (I now run a Corsa cat-back)
Results on my H/C/I LT4
Cutouts closed on the dyno - 392 rwhp and 370 rwtq
Cutouts open (very next run) - 401 rwhp and 375 rwtq
I actually picked up close to 15 tq lower in the rpm range (2,800 - 3,800 rpms) with the cutouts open, which surprized the hell out of me. I never ran the car on the dyno with the Borla capped off, and if I did, I imagine I would have lost 5-10hp more than with it uncapped.
As far as sound goes... the open dual cutouts are just stupid loud, a little muddy down low in the rpm's, but once you get past 3,000... ohh baby!
Results on my H/C/I LT4
Cutouts closed on the dyno - 392 rwhp and 370 rwtq
Cutouts open (very next run) - 401 rwhp and 375 rwtq
I actually picked up close to 15 tq lower in the rpm range (2,800 - 3,800 rpms) with the cutouts open, which surprized the hell out of me. I never ran the car on the dyno with the Borla capped off, and if I did, I imagine I would have lost 5-10hp more than with it uncapped.
As far as sound goes... the open dual cutouts are just stupid loud, a little muddy down low in the rpm's, but once you get past 3,000... ohh baby!
Last edited by Houdini; Jul 2, 2008 at 09:07 PM.
