exhaust crackling, popping noises

7000rpmisheaven · 01-24-2002, 11:16 AM

When I put my flowmasters on I started getting that backfire noise when I rev it up high and let off the gas. I know that it is supposed to do that and I think it sounds cool. Does anyone know why this happens. The reason I asked is because I traded my holley for an edelbrock performer and I lost that sound. I miss the sound so much that i think I might switch back to the holley.
Before i go out and buy anything does some one know why it makes this sound.

Mustangbelle306 · 01-24-2002, 11:32 AM

Yeah I'm stuck with 2 chambers too, and mine pop to a certain extent, but then developed into a full blown backfire when I was running WAY rich...I would think as long as it isn't something along those lines, then its just the Slowmaster character...however, I don't know why you would lose that by swapping..I know only about EFI anyways so I'll just STFU

7000rpmisheaven · 01-24-2002, 11:37 AM

If I had to take a guess, I would say that it is because when i switched carbs I went from vacuum secondaries to mechanical secondaries. But I could be wrong

Mustangbelle306 · 01-24-2002, 11:47 AM

See? Told yah I was a carb tard

I should learn more though, bc the Ninja is carbed and I should expand my horizons

7000rpmisheaven · 01-24-2002, 01:30 PM

I have always wanted one of those superbikes. I have never ridden one but they look like so much fun. I'd get one but my wife won't let me.

She said i can make the stang run 11's though. I guess that will have to do.

Mustangbelle306 · 01-24-2002, 02:21 PM

Really??? That's awful

My fiancee is actually the one that taught ME how to ride (he rides a 929)

I have a feeling I'll never buy a fuel injected bike myself because I tend to be twitchy, and I'd be scared I'd flick my wrist too much and loop that liter bike like THAT...I've watched Matt while riding pillion, and his wrist NEVER moves..not visibly at least

Hey can't complain about the 11 second rule! Most wives just plain hate the pony no matter what she runs

7000rpmisheaven · 02-01-2002, 10:33 AM

nobody answered my question. Doesn't anyone know why this happens?

Jeb_Bush_2000 · 02-01-2002, 11:45 AM

Closing the throttle temporarily creates a rich condition in the pipes, and you get little mini-backfires. Vettes do it, Camaros do it, my 'Stang does it, my dad's does it, his '67 did it, my buddy's Monte Carlo does it...etc, etc.

7000rpmisheaven · 02-01-2002, 11:52 AM

That makes sense, thanks. Why do you think it would stop doing that when I switched from my holley carb to my edelbrock. I guess you could say that that rich condition doesn't exist anymore. Do you think i should try richening up the mix a little?

Jeb_Bush_2000 · 02-01-2002, 12:16 PM

Couldn't tell you. I'm not a carb guy.

Coupe Devil · 02-01-2002, 12:43 PM

It is probably the mechanical secondaries. I'm not an expert but I do know a little. I always like the Holely better anyway though. I assume you tuned the cab when you put it on. If its new you still ahve to tune it a little. I dont care what they say about " Just put it on and go." Bull Malarky. you gotta fine tune it a little.

Brad

PKRWUD · 02-01-2002, 06:50 PM

If, when you release the throttle after revving it, you get popping in the exhaust, it is because the idle mixture is too lean, not rich. The idle mixture on your vacuum secondary carb must have been leaner. Need proof? Lean out the mixture on your double pumper and rev it.

Take care,
-Chris

01-24-2002, 11:16 AM	#1
7000rpmisheaven Registered Member Join Date: Nov 2001 Location: germantown MD Posts: 283	exhaust crackling, popping noises When I put my flowmasters on I started getting that backfire noise when I rev it up high and let off the gas. I know that it is supposed to do that and I think it sounds cool. Does anyone know why this happens. The reason I asked is because I traded my holley for an edelbrock performer and I lost that sound. I miss the sound so much that i think I might switch back to the holley. Before i go out and buy anything does some one know why it makes this sound. __________________ 85 GT 4bbl roller cam 2 ch. Flowmasters, O/R H-pipe Performer intake and carb milodon water pump, FMS 9mm wires, aluminum driveshaft, king cobra clutch

01-24-2002, 11:37 AM	#3
7000rpmisheaven Registered Member Join Date: Nov 2001 Location: germantown MD Posts: 283	guess If I had to take a guess, I would say that it is because when i switched carbs I went from vacuum secondaries to mechanical secondaries. But I could be wrong __________________ 85 GT 4bbl roller cam 2 ch. Flowmasters, O/R H-pipe Performer intake and carb milodon water pump, FMS 9mm wires, aluminum driveshaft, king cobra clutch

01-24-2002, 01:30 PM	#5
7000rpmisheaven Registered Member Join Date: Nov 2001 Location: germantown MD Posts: 283	I have always wanted one of those superbikes. I have never ridden one but they look like so much fun. I'd get one but my wife won't let me. She said i can make the stang run 11's though. I guess that will have to do. __________________ 85 GT 4bbl roller cam 2 ch. Flowmasters, O/R H-pipe Performer intake and carb milodon water pump, FMS 9mm wires, aluminum driveshaft, king cobra clutch

02-01-2002, 10:33 AM	#7
7000rpmisheaven Registered Member Join Date: Nov 2001 Location: germantown MD Posts: 283	nobody answered my question. Doesn't anyone know why this happens? __________________ 85 GT 4bbl roller cam 2 ch. Flowmasters, O/R H-pipe Performer intake and carb milodon water pump, FMS 9mm wires, aluminum driveshaft, king cobra clutch

02-01-2002, 11:45 AM	#8
Jeb_Bush_2000 Registered Member Join Date: Jul 2001 Location: Taxachusetts Posts: 374	Closing the throttle temporarily creates a rich condition in the pipes, and you get little mini-backfires. Vettes do it, Camaros do it, my 'Stang does it, my dad's does it, his '67 did it, my buddy's Monte Carlo does it...etc, etc. __________________ Stripped-down '93 LX Coupe -- "Danielle" R.I.P. 05/30/02 "I've seen some crazy stuff in my life, but that...was...AWESOME!!! Oh, sorry about your car, man."

01-24-2002, 11:32 AM	#2
Mustangbelle306 Yay for Chickys Join Date: Feb 2001 Posts: 1,532	Yeah I'm stuck with 2 chambers too, and mine pop to a certain extent, but then developed into a full blown backfire when I was running WAY rich...I would think as long as it isn't something along those lines, then its just the Slowmaster character...however, I don't know why you would lose that by swapping..I know only about EFI anyways so I'll just STFU

01-24-2002, 11:47 AM	#4
Mustangbelle306 Yay for Chickys Join Date: Feb 2001 Posts: 1,532	See? Told yah I was a carb tard I should learn more though, bc the Ninja is carbed and I should expand my horizons

01-24-2002, 02:21 PM	#6
Mustangbelle306 Yay for Chickys Join Date: Feb 2001 Posts: 1,532	Really??? That's awful My fiancee is actually the one that taught ME how to ride (he rides a 929) I have a feeling I'll never buy a fuel injected bike myself because I tend to be twitchy, and I'd be scared I'd flick my wrist too much and loop that liter bike like THAT...I've watched Matt while riding pillion, and his wrist NEVER moves..not visibly at least Hey can't complain about the 11 second rule! Most wives just plain hate the pony no matter what she runs

02-01-2002, 11:52 AM	#9
7000rpmisheaven Registered Member Join Date: Nov 2001 Location: germantown MD Posts: 283	That makes sense, thanks. Why do you think it would stop doing that when I switched from my holley carb to my edelbrock. I guess you could say that that rich condition doesn't exist anymore. Do you think i should try richening up the mix a little? __________________ 85 GT 4bbl roller cam 2 ch. Flowmasters, O/R H-pipe Performer intake and carb milodon water pump, FMS 9mm wires, aluminum driveshaft, king cobra clutch

02-01-2002, 12:16 PM	#10
Jeb_Bush_2000 Registered Member Join Date: Jul 2001 Location: Taxachusetts Posts: 374	Couldn't tell you. I'm not a carb guy.

02-01-2002, 12:43 PM	#11
Coupe Devil Moderator Join Date: Mar 2001 Location: Myrtle Beach SC Posts: 1,643	It is probably the mechanical secondaries. I'm not an expert but I do know a little. I always like the Holely better anyway though. I assume you tuned the cab when you put it on. If its new you still ahve to tune it a little. I dont care what they say about " Just put it on and go." Bull Malarky. you gotta fine tune it a little. Brad __________________ 1990 GT, 347, TFS TW Heads, TFS Cam, TFS Track heat, Twin turbos, FMIC, T5. Built Ford Tough Moderator

02-01-2002, 06:50 PM	#12
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	If, when you release the throttle after revving it, you get popping in the exhaust, it is because the idle mixture is too lean, not rich. The idle mixture on your vacuum secondary carb must have been leaner. Need proof? Lean out the mixture on your double pumper and rev it. Take care, -Chris __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

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