How to make the exhaust smell less??

[Fern]

So I have researched this for a long time now. I can't find any good answers.  Is there a way to lessen the gas smell so you don't stink after driving these cars. I have a 440 (low comp motor) with a Hughes cam (whiplash ) it has a good loppy idel  and it tuned for best vacuum (per holley avenger carb specs).
I looked into efi but don't know if that will help.
Any one know any better ideas??
Thanks

[Cuda Cody]

Yup, it comes down to carb and tuning.  Compression, cam, timing and jet size all play a factor.  You might have a dyno shop try tuning it so they can adjust things as they read the exhaust while under load on a dyno.

[shawge]

Here is where I think a wide band O2 sensor would come in handy.

[GoodysGotaCuda]

Here is where I think a wide band O2 sensor would come in handy.

Yep, the best $150 you can spend as a carb owner.

[7212Mopar]

Fuel injection and catalytic converters.

[Cudajason]

Here is where I think a wide band O2 sensor would come in handy.

Yep, the best $150 you can spend as a carb owner.

Its amazing what that will reveal!!!

Jason

[bennydodge]

If the cam has a lot of overlap it will stink even with fuel injection. If your clothes stink, a sharper carb tune will probably help. My 870 avenger (4 corner idle) took a lot of fiddling and it still smells a little. My 750 street demon also smells some too. More timing may also help.

[71-440]

I never noticed my clothes smelling and I thought my car stunk...... lol.
My buddy had that problem with his 65 tempest. Big block,cam etc. He had to dial in the carb and timing so it wasn't running so rich. He went back and forth several times till he got it right.
When he was done it smelled better and ran better.

[jimynick]

The smart ass in me wants to say "then just don't drive it so much" Sorry 

[BIGSHCLUNK]

I had "gas" smell issue for awhile. As I recall, my secondary throttle plates (750 HOLLEY DP) were not properly adjusted. Once that was done properly the smell was gone..

[Cudakiller70]

I have wanted to try one, would MSD multi spark help?

[303 Mopar]

Cheapest route would be a good carb tune and/or O2 sensor.  More expensive route is Sniper EFI which would also increase throttle response and quick starts.

[RUNCHARGER]

Yup: O2 and a nice tune or EFI. I find most people tend to run carbs too rich on choke and warm driving/idle.

[Cudajason]

Do you have your vacuum advance hooked up???

[Cuda_mark]

I kind of like smelling like big block exhaust fumes. The chicks dig it too....I think.