General Category > Quadrajet Carb Talk and Tips

How do you convince a person to try a Quadrajet? Combating the nay-sayers.

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kelley555:
Now we know what to get Cliff for x-mas,a few rolls for the car or baby wipes would work. !LOL ! Do they need to Sqeeze the Charmin, or is the quadrajet  just ! PLAIN  BAD A--!. I love that surprise look on their face,it's like spot lighting a deer.The one picture is a pic of the Edelbrock 1910 I purchased. The guy made it a manuel choke instead of the typical electric choke out of it. Also do I use a Brad Penn Oil with  zinc added  or use a diesiel oil (like a Shell Rotella) that gets tortured by the diesel machinery for hrs. everyday. I can add an can of EOS to the modern day oil also. I'm using  an older Gen 1 motor with the street/strip alloy 4032 piston's with  003. clearance & using a hydraulic roller cam similar to the later models that use a 5-30w is far from the 50w we run in race cars with lot's of clearance. On the cylinder walls we ran .007-.008;rod side clearance of 0.30-.035 & main & rods oat .003. & we had to use a hi volume pump to maintain a descent psi down low. What's out there without being  over kill or under kill.Later kelley

omaha:
I always run a  quart of mobil delvac truck oil, in my motors with flat tappet cams. I mix it with valvoline.
I have not tried the synthetics yet (cause all my vehicles like to mark their spot). In my minivan with the overhead cams I dont worry about it. Just plain 10w30 valvoline. Probably the rotella would work better in a car app., but I am a fan of the mobil delvac. It worked good in my Detroit diesel in my Frieghtliner. Had over a million when I traded her in. I tried the rotella in the diesel but it semmed like it just spitted it out (leaked alot and had more blowby). I have heard that just a small amount is necessary when using the EOS. Like 1 tsp to 5 qts. I have even heared that too much can be bad.. Oh well, I haven't flattened any cams yet. 

Cliff Ruggles:
On the original topic, we recently added another non-believer to the list.

One of our customers decided to take his high 10 second street/strip car and install an OD trans and smaller cam to run it on the street.

He was using a "Bear Claw" 1000cfm Holley carb, custom built for his engine.

After "de-tuning" the car for street driving, it ran low to mid 11's in the hot Texas summer weather.

The Holley was using a LOT of fuel for normal driving, so he switched to a q-jet.  He built his own carburetor, we helped him select the core and sent him everything required to build/tune it.

He went to the local track and the first runs were somewhat disappointing.  He was a solid .2 and 2 mph slower.  He loved the way the q-jet drove on the street, but all of his Holley buddies were dogging him pretty hard because it wasn't running as well at the track.

After a few phone conversations, he discovered that the attachment point of the throttle cable was higher on the q-jet, and the throttle plates weren't coming all the way to full throttle.  He moved the attachment point closer to the center of the shaft, and went back to the track.

He ran almost exactly the same ET and MPH as his old carb did in similiar weather.  He's driven and raced the q-jet quite a bit since the first runs, and got it to go even faster with some fine tuning!......Cliff

omaha:
yes!  a 1000 cfm bearclaw. Makes you wonder dont it??

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