Wierd sound coming from Borla exhaust...

wrd1972

Registered User

Join Date: Aug 2003

Posts: 285
#1

Wierd sound coming from Borla exhaust...

03-26-2004, 08:21 PM

Hello, I have a 1995 z28 LT1 hypertech PP with Borla SS exhaust. When my car is ideling it will make an occasional "muffled boom sound" usualy in sets of two or three. This sound is blended in with the usual exhaust sound and seems to do it more when the engine is cold or slightly warm but not hot. Im sure it is normal and harmless but Im just concearned and hoping it is not a problem. The engine runs well with no issues at all. If someone can describe why it does this it would be really appreciated.
Thanx
Bill

1995 Z28 Convertible, 350ci LT1 73K miles M6.
Dyno results: 301.5 RWHP 326.7 RWTQ
Performance Mods 4.10 gears, AS&M CAI, MADZ28 tune, Borla catback, RK Sport mid-length headers, LT4 valve springs, CC pro mag 1.6 RR's, LT4 KM, MSD OVC wires, TB bypass, 160 t-stat, SLP clutch plate w/Kevlar dual friction disk, 52MM TB, TB air foil, 1LE aluminum driveshaft, ASP UD pulley, LS1 brakes w/ Hawk HPS pads, LCA's and PHB.
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Kevin - Blown 95 TA

Registered User

Join Date: May 2003

Posts: 2157
#2

03-26-2004, 09:11 PM

Maybe a misfire? Possibly causing unburned fuel in the exhaust to ignite? Just a swag...
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