Backfire after runnin' hard

[Liberator TJ1984]

After running , motor sometimes backfires once when I get back into the gas and just crack the carbs to putt around ..what gives here ??? :idea:
8/71 2-1050 Dominators 30* locked out timing BBC454 2Mallory 250 pumps 8# fuel psi @ Log & carbs idles@ 900rpm
any input would be appreciated , do you guys need more info !
Thanks, Gopherrr

[Fiat48]

Backfire through the exhaust or the intake?

[Liberator TJ1984]

Fiat ,sounds like intake....

[Fiat48]

Check your shooters (and the little check valves below them) and also your linkage to the accelerator pumps. Sounds like not enough pump shot.

[Liberator TJ1984]

Thanks Fiat !!
will check this out, I have been having some trouble with my linkage adj. :wink: I was only worried about getting WOT not part throttle :hammer2:

[Blown 472]

I had the same thing, adjusted the slop out of the pump arms and it fixxed it. :rollside:

[Fiat48]

Yeah..that is what I meant by checking the linkage. Slop in the pump arms. My carb lingo is lacking.

[058]

Yeah..that is what I meant by checking the linkage. Slop in the pump arms. My carb lingo is lacking.Bob...you've been around injection too long. :D

[Blown 472]

Bob...you've been around injection too long. :D
Now that is funny.

[SVO 540]

What causes a blower motor to backfire through the exhaust?