Don Terrill’s Speed-Talk

If you have a gasket between the main body and the baseplate that is intended for an 850, it will block off the idle mixture passages of the 3310 baseplate. That will make the idle mixture screws ineffective ,and require opening the butterflies enough to idle on the transition slot fuel . And it's ...

Ok, thanks for pointing that out. With that metering block i should probably just not mess with the IFRs then I guess. Unless someone has specs on the part number 4100 metering block, then we could check the IFR size I suppose.

Thanks!

It had the stock 134-21 metering plate, which would have 0.081" main orifices and 0.040" idle restrictions. But I'm looking at the generic Holley secondary metering block that I have that came as part of the 4150 conversion kit they offer, and I just don't see any restrictions in it at all...

That's a great idea. I've used the Holley generic secondary metering blocks for decades and never though to modify the IFR. I've always assumed that the primaries would end up compensating, but matching those (assuming the stock IFR size is good) would probably help idle quality. Here's a new questi...

I just finished checking the metering block surface and the mating surface on the carb main body. The body surface is flat, and the block surface is warped. I'm finding areas with about 0.018" gap under the mini straight edge I'm using. The reason it's warped is interesting. The raised cast bos...

You had mentioned a couple of times that you were ruling out a bad power valve because fuel wasn't coming out of the boosters. It wouldn't, it would let fuel run through the bad power valve and through the hole in the main body and base plate. You wouldn't see it from the top side of the carburetor...

I expect that any warranty they provided ended 10-20 years ago. It's been rebuilt twice that I know of since CS had it.

Plus I like to learn and this is a tough one.

Thanks everyone for the input and ideas. Since there's no fuel coming out of the primary booster venturis while it's idling I think it's safe to rule out the power valve as the problem, and since it's an eye-burning rich condition I just wouldn't expect a vacuum leak to be the culprit either. I pull...

I'm working on an older 3310-2 that I just rebuilt to replace a 80507 600cfm vacuum secondary on my '68 AMX 390. The car ran great before the carb swap, and there were no other changes to the engine. As part of the rebuild the 3310 got a new primary throttle shaft, new Teflon bearing strips, and an ...

Regarding the WB O2 sensor location: Your extremes will be between cyls 1 and 3, so You'll want bungs in the header primaries on those cyls at a minimum. One in #2 wouldn't hurt. I would probably ignore the collector and work off those two primary pipes completely. You can screw a plug in them excep...

Just to wrap this thread up - Novadude was 100% correct in his predictions. The Edelbrock with -11 degrees at 0.050" idles like stock. The Crane with -2 degrees idles almost like stock, but louder, with more pop. The Crane has the earliest exhaust opening event of the three cams. Interestingly,...

Using the Crane as an example, the 24/32 is the span, 24 degrees on the opening and 32 degrees on the closing, for 56 degree total. In my spreadsheet I actually divide the numbers to store the data in the spreadsheet field, so what you see is 24 / 32 = 0.75. You can calculate them again pretty easil...

These should help illustrate the differences between the cams: Edelbrock vs Crane: https://lh3.googleusercontent.com/-_uWsy_x2JX8/VyzSWy013HI/AAAAAAAAI40/OsIofSf9zfQ-whlitdy78-y3hrk50vhGgCCo/s640/Edel%2BCrane.JPG Edelbrock vs Comp: https://lh3.googleusercontent.com/-8L-kbzUIelM/VyzSUf5Ws0I/AAAAAAAAI...

It looks like I don't save the HI from 0.006-0.050 anywhere in my spreadhsheet, I just calculate it on the fly where needed. But I do have the HI values from 0.004-0.050 and the HI span ratio, as well as the HI from 0.050-0.200: https://lh3.googleusercontent.com/-4lkiJ2kF-Ac/VyzSP1n4dyI/AAAAAAAAI4c/...

Thanks Greyhound on the edelbrock is IVO @.05 3 or -3? or else how do you get -11? Let's look at your H I (Harvey Crane's "Intensity")numbers for a moment since they have been mentioned only in passing F-bird can note the difference between his old school generic grind and the crane and c...