how many RPMs should my 12a idle at?

 

stock about 700/800 rpm

 

Off topic "slightly". How about a streetported, extendport, bridgeport- all with carbs- NOT EFI! And how about a streetport with a blowthrough turbo setup? I am getting like 1300-1400rpm for my blowthrough, any lower and its more likely to stall sometimes.

 

My bridgeport 13b used to idle at 1300 rpm also, it had a 48 IDA.

 

my stock 12A idles at 900-1100 rpm...i have a feeling thats too high.....

 

My 4 port 13B I have the idle set at 1k. Any lower than that more of a chance of stalling it. Carl

 

That depends on the size of streetport and the jettings. I have 2 streetported 13-B motors but with different years of plates. RX-3 idles 1000 while the FB idles around 1200. Both are running MSD6 and 48 IDA with larger than 70 idle jet. I accumulated many jets so I just drill them with index/# drill so I dont exactly know the size.

 

read the hood sticker stock idle is 750rpm mine idles at this sometimes and other times 900- 1100

 

yep 750

 

when mine works it idles at about 750-850

 

Mine was lucky to get down to 1500 and when it did it sounded like a caming big block and I had to keep one foot on the gas and one on the brake when stopping to keep it from stalling.

 

mines usually at 8-900

 

how do i adjust my idle?

 

there is a idle screw that looks real flat and is tucked under the carb. if your at the driver side fender look toward the right side of the carb and u will see it way back there. u have to get it with a long flathead