Slant dies when cruising.....

-
didnt get to it today as I am vampire. (work nights) . I will report all findings.
thanks ALL!
 
Are you running points? When my points went bad it presented as an idle stumble. It would die at idle and then while cruising. Might be an easy check also.
Good luck.
 
getting back to Dusty after a bit. doing a dizzy inspection. everything sends petty clean and moving freely, but one of the springs for the internal weights is 1) big and 2) never really engaging. the second picture is at full advance and the spring hook is just starting to touch the post.

look correct?

Thanks FABO!

20200428_073224.jpg


1588084598946676586102.jpg
 
Yes, that's correct. This is how the curve is created
 
clementine said:
getting back to Dusty after a bit. doing a dizzy inspection. everything sends petty clean and moving freely, but one of the springs for the internal weights is 1) big and 2) never really engaging. the second picture is at full advance and the spring hook is just starting to touch the post.

look correct?

Thanks FABO!

View attachment 1715518107

View attachment 1715518109
Click to expand...

Looks stock normal to me.
The big spring (garage door spring as we call it) is suited for trucks and heavy cars to make a long advance curve.
For a more performance oriented timing curve I replace that one big spring with a Mr. Gasket 925B spring.
That brings in the total timing around 2,500 - 2,800 RPM's which is more suited for the lighter hotrod cars and trucks.
Especially manual trans.

If you get a limiter plate from www.4secondsflat.com you can run a nice initial advance and the limiter plate keeps your "All in" timing from going to high.
Those stock distributors work really well if given a little attention.

You can also still get the Napa MO3000 rotor for them that is .030 longer on the contact tip so it burns the rotor tip less, especially when running hotter that stock coils.
 
i did a tune (rotor, cap, points, etc) it still has off idle stumble. so im getting into the carb. ill backtrack into the dizzy once the stumble is fixed. its an automatic, im liking that i can get some more pep outta this slant though.

i did check the fuel situation. no water. i did not back blow the fuel line.....yet.... only because it seems like my fuel pressure is muy bueno.

this plunger/ spring was not in carb kit. going to track it while carb is taking toxic bath. do the float too?

15880934488321843164021.jpg


15880934768391095448369.jpg
 
float seems to be ok, although im confused why this plunger is not included in a carb kit. i believe it's the accelerator pump? the thing that is probably causing the stumble. someone has a sense of humor in marketing i suppose.
 
turns out that little plunger is a vent. apparently i can re-use of not damaged. some serious bean counting going on.
 
got the carb back on and she is running good! one stall after an uphill haul to stop sign. ill look into those dizzy upgrades that Trailbeast suggested. she needs an 8 cylinder but I'm going to keep buzzing half a dozen for a bit.

Thanks for all the help!
 
So judging by process of elimination.......original problem was the accelerator pump. Im OK with doing the tune to get a baseline as I did find a couple things wrong like the PCV not hooked up to manifold pressure and crappy plug wires. Plus an education on dizzy with the bonus of building confidence with the car (she is new to those that dont know). I took her out and find still a little stumble out of the hole but Ill have fun tuning that out as well as getting the steering finessed.

Anywho....Thanks again!
 
clementine said:
So judging by process of elimination.......original problem was the accelerator pump. Im OK with doing the tune to get a baseline as I did find a couple things wrong like the PCV not hooked up to manifold pressure and crappy plug wires. Plus an education on dizzy with the bonus of building confidence with the car (she is new to those that dont know). I took her out and find still a little stumble out of the hole but Ill have fun tuning that out as well as getting the steering finessed.
Click to expand...

AH, So does your carb have a plunger style Accelerator pump or diaphram?
 
single barrel. Its stuffed behind a metering block behind the bowl. Its vertical, so my guess is diaphram? What say you? and does it make the current small stumble Im experiencing easy to diagnose?
 
I have a Holley. I didnt look at the numbers, and not as familiar as most to the carb numbers. It wasnt pissing. Well, I did what I wasnt going to do and I threw parts at it until it worked. The small stumble out of the hole could be timing. It certainly is better after plugs, wires, points etc and a carb rebuild. Its fun to try and squeeze as much out of this motor as I can. I find that I drive it to its limits which make it a hoot!
 
clementine said:
single barrel. Its stuffed behind a metering block behind the bowl. Its vertical, so my guess is diaphram? What say you? and does it make the current small stumble Im experiencing easy to diagnose?
Click to expand...

Yeah, that's what I'm seeing too... gotta say tho, I'm not used to using a single anything anymore :) sounds like you're in the right place now, good luck !
K365-2.jpg
 
Yeah, so I took of the air cleaner for the first time (just bought the Dusty last month or so) and it looked more like an oil filter. So I was checkin it all out as I was having air/fuel trouble and realized the PCV hose was hooked up to the carb/float/bowl nipple, (yes nipple) and that had ZERO vacume so I hooked it to the proper spot (I think) at the base plate of carb. This is a Holley single. So yes, I now have it hooked to manifold pressure......if Im saying that correctly. Oh...so not more using my air filter for oil. AND since rebuilding the carb and doing a tune with proper timing adjustment (although admittedly, I did not do a valve adjustment) There is no more hesitation (ok maybe a little, but Im closer, I may do the dizzy upgrades that Trail Beast suggested earlier)....So VICTORY!

Thanks FABO!
 
Clem, check the weight of the float, as they get heavy with age. Also, the dist. mechanical advance limiter shows a lot of advance. Initial adv. is likely zero to 5* BTDC.
 
hmmmmm... that might explain it kind of hesitating when cornering hard. i followed the instructions of having it warmed up, plug vacume advance, carb on idle circut and set to 7* ATDC. not sure about the mechanical and the initial..... how is mechanical adjusted? and how is initial measured? thanks, sorry if i don't have all the lingo down. (am i supposed to be BTDC? man, it ran soooo good after i adjusted the timing ... maybe my blind *** isn't seeing the marks correctly.... or damper had slipped...)
 
Alright, so I put the timing ATDC instead of BTDC. No more hesitation. Filled her up with NON ethanol gas. I have her at around 7-8* initial, but when I rev it, Im at 45* total. Sound right? another thing was I was going to find TDC but when I went to find the crank bolt its like the bottom pulley is a black hole and I couldnt find the bolt. Ill have to get in there when she isnt hot and look a little harder. Otherwise, fairly successful! I still would like a bit more out of her. Trail Beast dizzy upgrades coming soon.

Thanks!

Having a blast with this thing. So much less oppressive than the million things that need to be done on the barracuda project. It will happen but this is a welcome distraction.
 
clementine said:
Alright, so I put the timing ATDC instead of BTDC. No more hesitation. Filled her up with NON ethanol gas. I have her at around 7-8* initial, but when I rev it, Im at 45* total. Sound right? another thing was I was going to find TDC but when I went to find the crank bolt its like the bottom pulley is a black hole and I couldnt find the bolt. Ill have to get in there when she isnt hot and look a little harder. Otherwise, fairly successful! I still would like a bit more out of her. Trail Beast dizzy upgrades coming soon.

Thanks!

Having a blast with this thing. So much less oppressive than the million things that need to be done on the barracuda project. It will happen but this is a welcome distraction.
Click to expand...

Yes, that's correct as long as you were reading it with the vacuum advance connected.
 
You must log in or register to reply here.
-

Back
Top