Even though I have a ram-air setup on my carbed 305, my car still runs a lot stronger when its cold. Why? It also has a different exhaust tone, which is much deeper. What causes this change? Thanks

 

Probably running richer when it's cold and it like the extra fuel.

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Stephen's racing page

87 IROC-Z Pro ET Bracket Race Car
383 stroker (carbed) with double hump cast iron heads and pump gas
454 Big Block buildup now in progress for the 2001 racing season

Best results before the 383 blew up
Best ET on a time slip: 11.857 altitude corrected to 11.163
Best MPH on a time slip: 117.87 altitude corrected to 126.10
Best 60 foot: 1.662

Racing at 3500 feet elevation but most race days it's over 5000 feet density altitude!
Member of the Calgary Drag Racing Association

87 IROC bracket car
91 454SS daily driver
95 Homebuilt Harley

 

The air is also colder since the intake, etc. is still cold, which makes the air denser, which will produce more power.

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Working on:
'84 Z28 LG4 305
Added dual elec fans.
145 MPH IROC Speedo
Building 430 HP 350
using primarily GMPP parts.
Block is in shop!

Awaiting results from all 8 ASE tests.

Starting to look like the Kicker poster child!

 

I'm not too good with carburetors, but I know that they purposely run overly rich when the car's cold, so it won't stall while it's warming up. (Well, to be honest, fuel injected cars do the same thing too.) My guess would be that your car is running too lean once it warms up, or maybe the carburetor is adjusted properly, but the timing is off.

 

I don't think I can add anything but I would definaly say it's because the air is more dense. That is why one of the two reasons for having an intercooler on a turbo setup. Also the engine might be running in closed loop which would mean the engine is getting more fuel and is ignoring the oxygen sensor.

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, Jon (91 RS too many mods to list)