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Is the rubber injected into the mold under pressure or more like casting ?

Lets start at the top and work back. Post some photos of the engine and engine bay. We'll follow the fuel line back from the carburetor to the - well we'll see. We'll see other things too with the engine bay pictures. Like how the throttle to tranmission linkage was set up. Changes to...

Sounds good. Air cleaner off we'll see more.

We need to see how it was setup. A carburetor doesn't care how the fuel is supplied. it can be supplied by gravity for all it cares. I don't beleive a thing the salesman has texted. Not that he's a liar. He just doesn't know. Say you remove the electric pump and then discover the mechanical...

Too cloudy to seehave a chance of seeing aurora last couple nights That's pretty awsome!

Since it runs, I would not jump on making any changes right away. Here's why. I tell you to go put a Performer RPM on and your mechanic buys a Performer at retail price, charges his add on, and then his time to install it. Now you've spent a bunch of money and its not even the intake that some...

The "economizer" system accomplishes almost the same thing as a t-slot restrictor, but is not a transistion slot restrictors. It is arguably (and I think practically too) a more effective system because of how it works.

Its big because that is just meant to be a passageway, not a restriction. The outer passage goes to the idle port and is restricted by the needle valves (idle mix screws). The inner passage goes to the transfer slot and is restricted by the slot width, depth, and amount exposed to manifold...

That the old 284/284 duration cam for a RB block. But you have a 340? There are several versions of the distributor used by MP. Timing light, timing tape and tach will be needed to find out what timing curve looks like. Search here for a how to do this. There's various Holley carbs with...

What is meant normally be a "tune up" - spark plugs, cap and rotor, set points, etc. and set timing and idle fuel mix. It wouldn't hurt to change the oil and just check everything (spark plugs, air filter, cap, etc ) at 2000 miles. Looking at the condition of these items will provide some...

I should have mentioned another important factor in the spring force is the length, although I think you already figured that out. The amount the primary spring has to be extended to get installed is what creates the force holding the weight from moving outward. I may have some more pictures...

Good news. That's heavy spring is not stretched out. That loop is there on purpose. it causes the advance to slow down around 1600 rpm. That and the slight angle on the plate is all part controlling the curve. The small diameter spring maybe getting a bit stretched and this will effect when...

It's not odd. Take a look a some other multi-terminal connectors - like the ones on the bulkhead. Unless the vehicle is fully optioned out, some positions have no wires on one side and some positions have no wires or terminals on both sides. Same part used for different purposes saves money...

Top of the pentagon connector is power for the ECU When the distributor signals the ECU, the ECU connects its left pin (black and yellow wire in diagram above) to ground. That's all it does. Works same as points closing. Give that battery a long slow charge. it should be around 12.6 to 12.8...

I beleive that by '84 Chrysler had changed to ECU's that no longer required the 5th pin and 5 ohm resistor to control power for running the ECU. The plug was never changed. it may have the 5th ire removed. What wire did you touch to ground? If its the controlling primary wire (connected to...

There's no load. You can't use the numbers from no load to do much more than getting a sense of what the engine is like. a. With no load engines will love lean mixtures and lots of advance to match. b. At idle rpm the engine makes relatively little power. Any load at idle is a relatively...

Avoids wrenching and getting hands dirty ? or just more 'new and better' also upgraded Some guy just posted how much better his car runs with carb than his FI and he's just starting the tuning. Found it: Carb Tuning: IAB and Transition - Page 3 - Don Terrill’s Speed-Talk

The neatest labels will be the ones Dana posted. IMO they will not last that long. But just the process of labelling may help you remember how its hooked up. When you label, spend some time with the wiring diagram. That way you'll really learn how the circuits are connected up. The system is...

The factory oil pressure sender and gage used the IVR. The replacement senders do not seem to have the same calibration as factory 60s and early 70s senders.

This may help too. TDC is when the #1 piston is at the very top of the compression stroke. Top Dead Center Timing is the number of crankshaft degree either before or after TDC the spark will be fired. Initial or base timing: Timing with no advance added. Normally on a stock engine timing at...

Best advice can offer is to find someone close to you who can help. maybe Junkyardhero of moparofficial I say that because you've posted that computer is difficult and its no easier on this end of the screen for us if we don't know the specifics. Second best. I'll give this a shot. Need to...

Well since this topic has wandered all over the place, for those interested in a deep dive with Shrinker, and Klaus came across this one while looking for a different thread. It does touch on timing for a race car. Also Klaus's explanation for rich - lean changes between gears better answers...

I beleive you that no one at the company's could, or were willing, to say why they were following this fad. Techniques that Brasswell used for specific race cars can not be applied broadly. Somehow that got missed by some the folks who wanted to sell us on the newest latest and greatest. I'd...

Even Tuner has said at times to lock a distributor - when in some situations its the easiest path to get the results wanted. I can totally respect that. Sometimes its the practical thing to do. But if you can build even a small advance into the distributor it should help find more power.

@9secRR. See the links in post #44. I think those will answer your question.

...fully understand it right away, but it worked. My suggestion is to map out the carb which sounds like you're already planning to do. I don't *think* there is anything inherently better or worse with the XP versus an AED. If you want someone to fixup a carb for your situation, then contact...

You mean like this? Tuner has a gift in understanding and explaining how the science and engineeering are applied in practice. I do agree. When you see something wacky, there is no point in starting there. Start with a combo that is at least in the ballpark unless you have the time and...

You are correct, it is not a four corner idle carb. Always good to check in case a previous owner swapped blocks and drilled the body to convert it. But the images on Holley's website show a four corner idle carb - that's Holley's mistake. Their circa 2018 catalog had it correctly described...

Find yourself a used copy of Holley Carburetors and Manifolds by Bill Fisher and Mike Urich, any edition. You're buying for a good intro into how carbs work and the diagrams, not the marketing content. Alternatively for less, the smaller Holley Carburetor Handbook, Models 4150 & 4160...

Good guess but not correct. -7 is the revision C is the dichromate finish The number underneath is the date code. For example, from the 2018 catalog. So either the current revision changed meter blocks etc, or the photo is wrong because the marketing staff is clueless. My bet is the latter...