84stock

iTrader: (5)

I live in Alberta and have been driving my FB since december (winter beater got stolen). It's got 170,000km, racing beat air cleaner, RB header & presilencer ($20 wrecker score) and no cats. When it was real cold (-10 celsius, or 10 F) it pulled harder above 4000rpm. Now that the weather has warmed up it doesn't pull as strong. Any suggestions?? Jetting?? thanks

84stock

iTrader: (5)

Also, I picked up a used 12a for 40 bucks, it turns and apparently ran (15 years ago, been under a bench in a garage). I am going to use it as a rebuild core, going half-bridge. How can I tell what year it is? mine is an 84 and running well.

mazdaverx713b

iTrader: (91)

actually colder air is dense, and thus the denser air increases volumetric efficiency and allows the engine to run smoother at times and run a bit quicker and rev happier.

heb09

It pulled harder when it was cold because it could take the extra petrol. Dense air means u can fit more of it into a space and hence more petrol. Changes your jetts for sure.