This is a discussion on raspy! within the External Engine forums, part of the LSx Technical Help Section category; Well, I just installed my LT headers and ORY, and I have blown cats and when I get my car ...
01-15-2008, 10:48 AM #1
Well, I just installed my LT headers and ORY, and I have blown cats and when I get my car over 2k rmp it gets REALLY raspy, they are OBX cats (blown) after I do a tune would it get any better, or should I get new CATS or what? Maybe if I close my cutout it will help with rasp? Im not sure? Can anyone help me?
01-15-2008, 10:50 AM #2
what exhaust do u have?
01-15-2008, 11:06 AM #3
stock I think,I ddint put anything on, I dont think anyone put anything on it either. I just have OBX headers and Y pipe, what exhause should I get
01-15-2008, 11:07 AM #4
- Join Date
- Jun 2007
- Parma Heights, Ohio
- 99 Trans Am
If you dont have emissions then replace the cats with resonators. That will make a big difference. Or you could always go true duals which sound bad ass.99 TA-T56 swapped, Lid, TB Bypass, LS6 Intake, !EGR, !AIR, Custom Cam, Mids, O/R-Y, 3:73s, Cutout, Flowmaster.
A4 numbers w/ mids only 320RWHP 333RWTQ
Cam numbers and track times soon.
98 NBM Hardtop Formula- Bone stock, A4, 187,000 miles
13.8@ 103 2.1 60' 1357 DA
01-15-2008, 11:08 AM #5
also, I have some leaks at the connect points that im gonna patch up today, so I hope maybe that will help some..
01-15-2008, 11:09 AM #6
how much are resonators? nm there are emission laws here, but just a visual, so I need cats, or something that looks like them (blown) also I dont have alot of money right now to put in true duels, I just bought and put in the LT and ory now I need to save for a tune :/
01-17-2008, 12:57 PM #7
well, I closed my CUTOUT and now the rasp is gone. It doesnt sound as mean, but no rasp. I guess I need to get an electric cutout installed, and keep it open like D.D but close it when racing ( high RPMS)
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