i need to know so i can order some that are around the same size.. looking to have some around for when i get my air fuel ratio tester. i wanna get this damn thing right for once... i have every indication to believe that its lean, since i have opened theintake and the xhast up quite abit...

anyone know the stock jet size?

its a qjet off of a 86 ho 305, for a 305 with some goodies

Steve

 

q-jet fuel adjustmet is more than just jets. There are different size rods as well. Take a look here for some info on changing jet sizes.

http://www.calgarydragracing.ab.ca/t...s/quadjet.html

Go the the junk yard and strip apart a few q-jets for different size rods and jets and start playing with different combinations.

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Follow my racing progress on Stephen's racing page
and check out the race car

87 IROC-Z SuperPro ET Bracket Race Car
461 naturally aspirated Big Block

Best ET on a time slip: 11.242 altitude corrected to 10.69
Best MPH on a time slip: 121.52 altitude corrected to 127.76
Altitude corrected rear wheel HP based on power to weight ratio: 504.5
Best 60 foot: 1.546

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

 

well from what it says there, the rods are all .16... so not gonna find anything different there... good info to knwo tho-

although with out yanking my carb apart, anyone know the size?

Steve

 

ok, yanked my OLD qjet apart, found it to have 29b jets in it... now, anyone know what SIZE these are????

Steve

 

Upside down maybe? P65. Not sure what the P would be but 65 sounds better. The q-jet I used to have had 63's in it.

 

thanx steve- i think i am gonna just get about 5 sets or soemthing, then just look at em- they are def 29's and the B is capitol letrter... go fig.. anyways.. thanx

Steve

 

I can almost garauntee that the q-jets primaries are not too small for a 305 with some goodies... it was more then enough for my 350 with some goodies!

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1984 z28 w/ a 357 cu in. monster engine which is looking like the posterchild for Edelbrock with the exception of the Holley 750vac... all the suspension stuff... 9-bolt posi disk is in...

-=ICON Motorsports=-

 

I agree w/ BC, there is absolutely NO reason to be messing around with the primary side of your carb. I too ran stock primaries on my old 85 w/ a cammed 350, and it ran prefectly and got better gas mileage than most TPI cars. the only alteration from stock was i ran 5/32 travel on the MCS (max for factory spec) which helped cover up a small 1/2 throttle stumble.
You're welcome to experiment, but you are wasting your time.
...ed

btw, i can especially guarantee you won't find any WOT gains from different primaries. I experimented with opening and closing the MCS travel up one night at the track (equivalent to playing with rods. And it didn't matter if i closed it up to practically nothing or ran it wide open, my et and MPH were identical. Q jet primaries don't do anything significant during WOT, the secondary metering is what makes your AF ratio.