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Yesterday while running around town, when I put my 518 in neutral it (or converter?) responded with a very loud screech. (I had a similar quite disturbing sound once in the past, but it turned out the flex plate bolts were rubbing on my dust cover, removed it and left it off.) I pulled off to...

Large primary carb from 1973 440 truck. Throttle primary shafts have been rebushed with brass bushings. All new gaskets from Walker kit, ethanol safe pump, new x-rings, new choke pull-off, passages all cleaned and blown out with air, etc. Bowl checked for flatness, fuel wells checked, floats are...

I've listed this TQ on eBay, full description is there. From 1973 440 truck. Throttle primary shafts rebushed. Walker kit, new pull-off, ethanol safe pump, etc. Performance build based on study of old "demonsizzler" posts, and Mopar bible. Identical settings to what I run on my 340, which gives...

340 with Thermoquad and MSD distr. with 6A box, recent plugs, good wires. In my last Thermoquad thread I was diagnosing fuel leaking into the intake. Turned out to be a leaky brass float which I got fixed. This was a #6518s that I had rebuilt not long ago. ('74 440 "Industrial".) Also I had...

I've been running a really well dialed in 440 TQ on my 340. I have an A/F meter on it, and keep an eye on the plugs. I have nothing but ultimate praise for the TQ!!! Once I finally figured out how to set up and adjust this carb, I find it much more tuneable and easy to tweak if necessary...

I have a friend who's building a 440 out of a truck, to go in a Chrysler 300. ...and he's asking about what caused this. I assume detonation??? Would anything else cause this?

I've got my Thermoquad dialed in really nicely, great A/F #s all around, plugs are good. Timing curve is good. Yesterday I removed the air cleaner and watched the secondary air door open when blipping throttle quickly and the vacuum dropped. Today, the pull-off is preventing the door opening...

Prepping to build new 1-7/8" headers I made these to form the ends of the tubing. Worked well so I thought I'd share the idea:

My friend picked a 440 and pulled the distributor to spin the oil pump ...and found this: What happened???

Hey All, just a question that some of you might have an opinion on. (there are some opinions here if I recall.) :D My 340 is pretty well sorted at this point, tuning etc. I have a true 9:1 motor, Lunati solid .526/.546 lift cam, port-matched LD340, big Thermoquad, etc. Cope built 518 OD...

For anyone who might enjoy thinking about TQ's a bit... I have everything pretty dialed in, and TQ sorted to the point of good looking plugs and good numbers in general on my A/F meter. (Timing on the 340 is at 18/38 which gives best 1/4 MPH and the ignition curve is pretty worked out as...

This is probably one of those situations where I go "DUH!!" when I figure it out, but here's the question: Wanting to be NHRA legal, I have a 1/0 battery cable from the rear battery through a kill switch to the starter, then to the big post on the starter relay. I have the alternator charge...

$200 B&M Pro Stick. Mopar attachments. Used but in good condition. Included 5' heavy duty cable lightly used. $15 shipping in US. http://ebay.us/Ie6O0Z?cmpnId=5338273189

[SOLD] Just put up for sale: Edelbrock 1407 manual Choke 4 Barrel Carburetor 750 CFM, recent rebuild | eBay $200.00 Carb has about 30k on it, fresh kit in it not long ago, upgraded 800 model accelerator pump, just checked floats are correct. Stock Edelbrock jetting and rods. (Marked...

I built a fresh TQ for my 340, and one more I’m selling for a ‘73-74 340, but now someone else is asking where they can get theirs rebuilt. I’m not intending to start doing more. Any tips as to who might be reliable?

On EBAY as of today.. Thermoquad 6319S 1973-4 Mopar 340 A/T Rebuilt to factory specs Thermoquad 6319S 1973-4 Mopar 340 A/T Rebuilt to factory specs . Carefully rebuilt to factory specs with quality kit from Walker Products and new choke pull-off from Mike's Carburetor Parts. Stock jetting...

Finally got warm enough that I got around to graphing my timing curve. 340 with MSD Ready-to-Run distributor, 2500 PTC converter, 4:10 gears. Right now timing is at 18/34, (may bump it a degree two.) I’m thinking maybe I should bring the curve in a little sooner???

What is a good way to track RPM for tuneups? I have a good tach inside, and a good non-dial back timing light. Is there a decent handheld tach for a reasonable price? I have one of those old Actron tach/dwell meters, but it doesn’t have the RPM range to check total timing.

So I rebuilt a '73 Industrial TQ with 1-1/2" primaries. Walker kit from O'Reilly's, choke pull-off from Mikes. Sitting on a TQ adapter on LD340. (Cc'd 9:1 compression 340, headers, Lunati solid lifter cam, MSD ignition, etc.) I modified a set of rods to 67/52/42. Replaced .098 stock jets...

NOTE: PHOTOS WILL FOLLOW! i needed different rods than what was in my carb in order to fatten up the mix some. A 9000 series emissions era parts carb had some very lean rods which were 67/57/54 when measured. I modified them to 67/52/42. I found out that in my cheapy drill press (one of those...

Thought I’d post one version of a home made Thermoquad adjusting tool. I had the fittings in a drawer, so... Used it yesterday, easy to hang on to, and was pretty easy to make.

UPDATE: Vacuum Leak??? (all details in my thread "Thermoquad help questions.") Thought it best to start a new thread here. In my last post I was getting very low vacuum with this freshly installed 850 cfm Thermoquad 6518S I rebuilt, using a Walker kit and new pull off from Mike's. I used a...

Hi All, I have rebuilt the TQ and using a Mr. Gasket spacer to my LD340 for now. I did a bunch of work this morning to the spacer, gasket, and some on the intake opening to get nice smooth accurate alignment. Should help some. But I have a couple of questions: 1) If I am not using a choke...

following the Carter book step by step, removed all 10 screws, lifted top off. Book says carb phenolic resin bowl can now be lifted off the base. But it is very stuck. I won’t pry on it of course! I held it by the bowl and tapped on the corners of the base ...firmly but gently with small...

Happened across this so thought I’d share. Down to earth, dirt cheap recipe for a reasonably strong street/strip 318 build. No nonsense, DIY and no hype, no sales pitch. Kinda fun approach and if I didn’t have my 340 this is what I’d be doing. Always liked my 318’s!! What do you guys think???

Just bought FIVE ThermoQuad builders for $50- as I am wanting to try a TQ on my 340. So here's what I have: 6518S this an 850 and is the cleanest which I hope to rebuild and use. According to the list. I have this is listed and a "440 Chrysler Industrial" and I have no info on rods/jets in it...

THEY BOTH WORK JUST FINE, OK!!! I am posting this for no other reason than I want Edelbrock owners to not be plagued by that pesky little thought that sometimes pops up in the dark back corners of your mind, "...maybe I could gain just a teeny bit of power if I'd switch over and learn to tune...

Recently semi-rebuilt the 340 and added the Lunati solid cam 235/243 @ .50 and .526/.546 lift (Howards EDM lifters) with a stated rpm range of 2400-6600. So this is a 9:1 motor, iron ported X heads, LD340 intake, 650 AVS2, headers, all MSD ignition, etc. Heads set up with dual springs...

just did a road trip plus 1/8 mile fun drags. Had one adjuster shear off under the lock nut. Fortunately the nut/top of adjuster was sitting in the head! Machine shop had told me I needed 30 ft/lbs on the ARP lock nuts. I didn’t go that high, but what would recommend?? And who makes the...

Had an interesting experience with a new cam and thought I'd share. No dyno, no clocks, so this is a seat-of-the-pants report. This is my first time running a performance solid lifter cam (so not counting my VWs and Slant 6s.) My 340 has ported iron X heads and as stated in other threads...