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    Weird issue with AFB

    OK, got it.
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    Overheating 360 new engine

    Rusty, If measure up all the holes in the head gasket/block/head [ I have done it ] , you will find their combined area exceeds that of the stat opening.....by a large amount. The stat becomes the restriction in the system that allows pressure to build up behind it. The pressure suppresses...
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    How much for 71 Thermoquad?

    The info on the 1971 340 TQ in Shepard's Carter/Edel book is completely wrong. There is a pic on p. 10 & it is of a later 9000 series carb, & it is NOT a 71 model. Shepard claims the 71 has one large rear fuel vent. It doesn't. It has two at the rear, & the front vent uses a casting projection...
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    Weird issue with AFB

    Sorry, Not following this at all. [1] Pic in post #10 shows a port below the blades [ at idle ]. This will supply manifold vacuum. Why was it necessary to gouge the hole as in post #12? [2] You can Tee into any man vac port, except PCV, to provide man vac for what ever accessory you want. So...
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    Overheating 360 new engine

    Drilling the stat makes it worse because it reduces the pressure in the system. The pressure reduces localised nucleate boiling [ air/steam bubbles ]. The reason that drilled stats appeared on the scene is that Stewart Components, maker of race water pumps, eliminated the bypass in some of their...
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    318 MAX fuel economy builds?

    I would be very careful with 'porting' heads where economy is the goal. If the ports are large enough & flow enough to support the intended rpm range, then removing metal could make the port sluggish...& hurt economy. Removing sharp edges, dags, & a valve job might be all that is needed.
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    Resurfaced lifters

    Kern, Unless the lifters are 25 yrs or older, I wouldn't trust them in a lawn mower....
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    Resurfaced lifters

    Bakerlite. Yep. I had lifters re-faced once by CamTech & they a 'point' in the centre, so I have been using Clive ever since, never had a problem & he gets a superb finish on the lifter.
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    318 MAX fuel economy builds?

    Dmopower, I think your strategy is well thought out & do-able. Because mileage is made at lower rpms, I do not see any benefit from bushed rods if it is going cost $$ to buy/use them. The annular booster AVS is a good thought, but I think a small TQ would give better economy.
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    Holley 2280 throttle bushings

    Although it is hard to tell from the pic, I doubt that that amount of wear is causing the problem. I have always found 4 bbl Holleys to have a lot of shaft clearance, even when new, compared to other brands, so 2 bbls probably the same. Worn shafts [ if they are worn ] do not cause fuel to...
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    Weird issue with AFB

    The exposed port in post #10 is for manifold VA because it is below the t/blades at idle. The exposed port in post #7 is above the t/blades at idle & is for ported VA.
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    Resurfaced lifters

    Clive Cams in Melbourne.
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    How much for 71 Thermoquad?

    Hysteric, Post #45. There are two aspects to superior metering of these carbs, so one at a time. [1] You are the one making the claim that 72 & up has superior metering. How/why? I do not know. I have read the same info you have which are just claims, never seen any testing or comparisons...
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    Thermoquad primary well casting in rough shape - is it okay?

    Might seal. If it doesn't, it will be rich & smelly at idle. If it was my carb: I would emery the casting & remove 0.005". Then with the black centre section, remove the same amount from the top using emery paper, rubbing on a flat surface.
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    Weird issue with AFB

    Congrats on using the AFB, a great carb, Carter or Edel. [1] If you have uneven t'slot showing at idle then the shaft is twisted or blade bent. The main air bleed & emulsion holes in the boosters change the jetting requirement. Eg, the 625 AVS carb has EXACTLTY the same size pri venturi & bore...
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    318 MAX fuel economy builds?

    The NGK 3/4" reach/13/16" hex is a 'BP', eg BP5S for Mopar V8s. I no longer use the 13/16" plugs in any engine I build/service, I use the 5/8" hex.
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    Resurfaced lifters

    We have been using re-faced lifters for DECADES in this country because of the high cost of new ones. There will be zero failures if they are done correctly. At one time when I was actively drag racing, changing/testing new cams, I had the same FT lifters refaced 2 or 3 times.
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    How much for 71 Thermoquad?

    850 v 850
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    How much for 71 Thermoquad?

    And what proof/comparison do you have?
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    74 Swinger brake CLUNK!

    Did they adjust the brake shoes??? If not adjusted, brakes applied, the shoes get dragged around by the contact with the drum until they hit the stop. When the car changes direction [ eg, R to Fwd ], the shoes reverse direction & hit [ clunk ] the other side of the stop.
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    318 MAX fuel economy builds?

    Elec ign conversion should be on the list. At the top. It has two important benefits that aids mileage & performance: [1] it does not start to retard the ign from day one like points do because it does not have a rubbing block that retards ign as it wears. Retarded ign hurts performance AND...
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    How much for 71 Thermoquad?

    I have two 850 CS TQs with press in jets. I fitted some coil springs over the jets that pressed against the black body to make sure the jets did not fall out...& they never did.
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    318 MAX fuel economy builds?

    Use a small [ 800 cfm ] TQ carb. To resist the temptation to use the secondaries, disconnect the link connecting the pri to sec. The extra booster ring in the TQ primaries provides exceptional fuel metering & atomisation, a must for good economy.
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    This is why if you port your heads, port your intake

    What are the flow #s now with openings ported?
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    Vacuum advance information and myths

    Yup, VA is not understood. Not helped by ignorant magazine writers you talk about the 'feature' engine in their article, & mention the MSD or DUI dist they are using for free plug, but make no mention of VA.
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    spark plug wires

    To me, the operative word in the original thread is 'good'. Cheap leads use a high resistance carbon track as the conductor for the spark. These can & do crack leading annoying & intermittent problems. So make sure the leads use a metal conductor, copper or s/steel, helical [ spiral ] wound for...
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    Thermoquad 1966 Metering Rods

    ^^^^. This. Spark plug conversion charts [ between brands ] are an approximation. For Chry V8s, a '5' in the NGK range is best, in the NGK catalog. If road racing [ continuous WOT ] or using a power adder, then a colder plug such as a 6 or 7 may be reqd. I am in the process of building a brand X...
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    Thermoquad 1966 Metering Rods

    Quick, You cannot judge the carb just by jetting alone. The earlier 6000 series carbs that I have seen had smaller primary high speed air bleeds. They are easily seen with m/rod inspection covers removed; they are a brass insert, next to the side wall of the choke tower, near the inspection...
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    Thermoquad 1966 Metering Rods

    Rumble, You must be eating some of that horse **** & it is affecting your brain....I do not need to read again what you keep getting wrong.... You must have fallen asleep in the maths class at school..... One last try before I stop wasting time with you. Your quote: 100 jet, 66...
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    Thermoquad 1966 Metering Rods

    So as per my post #8, less than a 1/3 increase in fuel area, not the triple increase nonsense at the end of post #11.
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