1946 Carb

[FastRonald]

8) I adjusted the carb on my Son's 200 last night..........It will now do a burn out the full length of the drive way at full throttle. BUT>>>>>>>
from 1,500 to 2,000 or so it seems to be getting too much gas. This causes a stumble. So......time to adjust the float level again and may go back to the orginal jet too and see what that does. The car is a bullet now, just need to eliminate the stumble.

 

[Anonymous]

what kind of car is it? can u get us a pic of it doing a burnout?

 

[FastRonald]

8) It's an 81' Granada GLX with a 200 and auto trans. It has P-235/60 - 15 tires on Cragar S/S wheels. Guess we could take a pic

 

[lightnin-boy]

What did you adjust? I have a 1946 I'd love to get that kind of performance out of....

Thanks,

Kirk

 

[Anonymous]

wow, is the granada a 2 door or 4 door, cause i got a 250 in a 4 door and i cant even do a brakestand, i gotta have all my fun when its wet out.

 

[FastRonald]

8) It's an 81' Granada GLX two door. It has some modifications, and a five lug axle conversion. The one step you need to look at is the jet size.
Too big and it goes like hell at full throttle, but stumbles at lower speeds. Experiment with the jets, and float level. be sure your fuel flow is good as well. We are also NOT running any mufflers.......the convertors do that job.
It has new convertors so there is no restricted flow through them. Play with the timing and you should see a nice big boost. We also use Mobil gas if that helps.

 

[Anonymous]

Thanks FastRonald, i'll play around a bit with the jet sizes and float level. My timing is already as good as i can get it, ive got five lug axle and exhaust is just a straight pipe with cherry bomb. Ill play around with it some more, cause in march sometime i might go to the track and test it out.

 

[FastRonald]

8) We're planning on taking the car to U.S. 41 Drag Strip and see what it does too. I had a 65' falcon Futura with a 200 decades ago and raced it too. It would only hit the mid 18's .it was 99% stock. I changed the jet again.......still goes like mad but with the smaller jet has a slight lag at a full throttle stomp from a dead stop and engine at idle. I'll find the perfect size jet yet.

 

[Anonymous]

when u find the right jet size make sure u post it cause everyone'll want to know (at least i will )

 

[FastRonald]

8) Will do! I'm looking to hit the ragged edge so we can make the run like a bullet.

 

[Anonymous]

FastRon;

The 1500-2000 RPM range is where the 1946 expects the EGR to be dropping open to dilute the mix, so it is calibrated rich right in that range for that reason (the EGR acts like a vacuum leak, so the carb goes rich to compensate). The mix in this range is controlled thru 3 passages in the carb body.

The mainjet change will only help a little, ending up lean on top end when the midrange is right. Float level won't change it in any single range on this carb, but across the whole range. This was carefully designed this way for emissions reasons. The idle screw has authority up to 1500 RPM, adjusting 10% of the mix at that speed.

The power valve might also be the culprit, if you've removed the engine's EGR valve. It has a really strong spring: try removing a turn or 2 to delay it's opening. The VERY NARROW passage for the vacuum that pulls that valve shut tends to leak its vacuum away, too - so use a new top gasket every time you open the $%#! thing up - been there, many times. By delaying the power valve to open around 6 in. HG instead of the stock 8-9, it will let it stay a little leaner (5%-8% leaner) in the lower midrange.

As far as I can tell, there is no direct adjustment for the low midrange, like the needles in some carbs. So, you sort of have to "work around" it a little.

FYI: The 1946 flows 187 CFM.