Just curious.

When Im in park and I rev up my car to about 3 grand its fine. When I rev it up higher to like 4, when I let off the gas my exhaust Pops a little. When Im driving it, it never pops/crackles ever. Just when I rev it high in park. So is this normal or do you think im running a tad bit rich?

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1988 Jet Black IROC
5.7L W/ 64000 miles
Flowmaster Exhaust
Fully Loaded
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My IROC In Readers Rides
My IROC

 

Thats normal my car is a 5-speed so evertime I shift it does that too. Thats also why I cut the thing off and went SLP sounds way to glass pack like.

 

Wierd, When I drive mine it dosent do that.

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1988 Jet Black IROC
5.7L W/ 64000 miles
Flowmaster Exhaust
Fully Loaded
------------------

My IROC In Readers Rides
My IROC

 

That is what happens with high flowing exhaust. You say it doesnt do it will you drive... what is because it only happens when the motor is "de-revving" (kinda like deceerlerating).

That means if you put your shifter in "1" and bring it up to 4000 and then let off the gas and let it rev down on its own.... I'll be my last penny that it will pop there too.

Open exhust does this, more easily than something more stock. The stock muffler does this too, but you need more RPM, and its quiet so its harder to hear.

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1989 Chevrolet Camaro IROC-Z
L98 - 350c.i. TPI, rebuilt 700R4 auto w/shift kit, Dual catalyst Monza PaceSetter Cat-Back, SLP 1 5/8 Coated Headers, 3.23 Posi rear, Hypertech Thermomaster chip with 160stat, MSD 6A, March Under-Drive pulleys, AFPR, K&N's, !Air Box w/ Ram Air, moddified MAF, !TB Coolant, Spohn Dual Cat SubFrame Connectors, Alarm, Keyless entry, remote starter, 92 Z28 AeroWing, Brand New Paint (6/21/01)

Future: ZZ4 TPI w/EGR, T56, 3.42 or 3.73, Spohn strut tower brace and LCA's, Accell Universal 24# injectors

1989 Chevrolet Celebrity Eurosport <--DEAD AS OF 9/20/01
2.8 MPFI, no mods
225,000 miles and still ticking!

More info and pics on my webpage:http://go.to/iroc-z

AOL IMer: GPA 0point0

 

It will do that if you manualy shift the automatic and let the engine slow down the car. That is unburnt fuel poping in the exaust. Its normal.

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-Tas
'89 Formula WS-6

305, TBI, 700R4, P.A.W. 14x3 open element with K&N, Milodon 160* thermo, functional Formula hood, cross-flow Flowmaster, '99z28 rear pipes and tips, Hooker 1-5/8" 50 state legal headers, Dynomax 3" I pipe (PN 44063 and 43248)
Super GRK_Taz World
F-Body Dual Exaust
EFI & Intake Options
AOL IM: superGRtaz


Got Beach?

 

Cool thanks guys. Yes I have drivin my car in low before. Poped when I let off the gas too

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1988 Jet Black IROC
5.7L W/ 64000 miles
Flowmaster Exhaust
Fully Loaded
------------------

My IROC In Readers Rides
My IROC

[This message has been edited by IROCThe5.7L (edited October 06, 2001).]

 

Mine does that sometimes when im actualy driving, high rpms which shifting, or if i let off the gas around 4000.

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- David
88' GTA 5.7L TPI MODS---> air foil, K&N, Shift Kit, 180* therm, TB bypass, Gutted CAT, Flowmaster 80 Series

 

Mine does that in park and when your doing 65 70 in D and let off the gas..sounds even better when slowing down for an off ramp

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1988 Sport Coupe 305 TBI
K&N
Flowmaster 80


Daily driver:
1988 K1500 5.7 4x4 shortbed flowmaster cat-back gutted cat.
AOL: RyanNH84

[This message has been edited by NHcamaro (edited October 07, 2001).]

 

go about 20 or 25 MPH and drop it in 2nd and listen to it. i wish my car sounded that way all the time.

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- David
88' GTA 5.7L TPI MODS---> air foil, K&N, Shift Kit, 180* therm, TB bypass, Gutted CAT, Flowmaster 80 Series

http://www.geocities.com/david_angel_16

 

I LOVE that!!! Part of the reason I got a Flowmaster system...

You can always hear it when you shift if you have a T-5, or when you slow down..

With a 700R4, I've only been able to get the popping if I have the car in (N) and I rev the car to about 3500-4000 RPMs and then it will pop when it comes back down...

Way sweet sounding!!!

-ONE2FLY

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1990 IROC-Z Camaro

Artic White w/ Gold Decals, 305cid V8 TPI, 700R4 Auto w/ OD, 16" 1992 Z-28 rims (w/ white trim), Z-rated Extremos 245/50/16s (new), Power Options, T-Tops, Tinted Windows, Flowmaster Exhuast w/ High-Flow Cat-Back....

 

My exhaust does that too when i rev it in park. After 3 grand it does sound like it is crakling and popping

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Steve
88 Firebird TBI(WS6),TH700R4 - Open Element, Catco 2 1/2 High Flow Cat, K&N filter 14*4 element, 2 3/4 pipe with flowmaster 80 series with 2 1/2 inch turndowns, 180 Stant thermostat, Accel cap and rotor, L98 cam