Edelbrock Carburetor Step Up Springs for Tuning

Edelbrock Performer and AVS2 step up springs seem to be one of those details in the carburetor that draws some confusion. While they aren't very complicated, their use in the tuning process gets over looked. They're a great little tool to help get the most performance and drivability from your engine.

#edelbrock #carburetor #tuning

[terrysholar]

Thanks Man, ...your words helped me alot!!...67 Plymouth Belvedere 440 with 800cfm Eldelbrock.

[johnweaver]

Another great video my Edelbrock 2065 dual quad set up arrived 2 weeks ago I ordered it 8 months ago the metering rod's were bouncing at idle 300 duration cam I put in the blue springs and they stay down at idle, I'm sure there is more tuning to be done idles great in gear plugs are tan colored and it's a frickin blast when I put the pedal to the metal in my 68 Camaro good guys in Puyallup is 2 weeks away I'll be there keep the videos coming

[johng]

So I bought a cheap Amazon kit changed out couple gaskets and I messed with my idle screw once I put it all back together and put it on. I think it’s a really high idle and now I’m getting that ticking noise. Thank you for the clarity love your videos and clear knowledge.

[DC-vxed]

Hey Boss, love your educational videos, if recall our conversation a couple months ago, installed the in the tank EFI Bosch fuel pump, having 6an fuel lines & Holley regulator for my 91 Jeep YJ with the 383 stroker and the AVS2 500 cfm...Runs absolutely perfect now. Will begin tinkering with the fuel mileage now since the Fast AFR was also installed as well.Keep up the awesome information, it's appreciated. 👍

[wtty]

Excellent video as always. Thank you. Your point about timing is very interesting. I am at 5300 feet and when I set the timing to the shop manual specifications, my engine ran terrible. I advanced it and always figured it was because of altitude, despite there being no good references or agreement as to how many degrees you should add per thousand feet of elevation. I can’t remember how many additional degrees I added, but I think I went from something like 5° (spec per the manual) up to about 10 or 12 BTDC. I worried that was quite a bit of advancement. Your comment about today’s fuels was very interesting and something I was unaware of; that may be part of why i had to advance the timing so much. Once I set my timing ( I pretty much just set it to where the engine idles well and does not ping under load), the carburetor was easy to adjust.

[busheed]

Awesome video man, great information and easy to follow. I’m new to carbs and about to rebuild a 1406 for my 350 k5. Thank you so much for what you do. And for the tip about the 12 degrees before TDC.

[scottharvey]

Great vid on the step up spring operation as to knowing that the metering rod piston should pop up when you snap on the throttle and that's when you got the right springs in

[codygentry]

If you watch live data on any fuel injection engine it will show a high timing at idle and low load. This is why vac adv belongs in manifold vacuum. The trick is to mod the vac can to only add 10-12° so my engine is 12 base and with vac adv its 22 at idle. As the part throttle cruise increases the vac it stays adding 10° while the distributor weights add timing. My distributor is 22° of weights all in at 3k. But either way an engine needs most timing at low load and high rpm. So a situation of part throttle cruise where you are going maybe 30mph you want like 45-52° timing. Because what nobody understands is a lean mixture needs more time to burn!

[seanjohnson]

I have a 65' thunderbird with the 390FE. I have the Edelbrock performer intake manifold, lunati camshaft just a bump up from stock cam specs, . shorty headers, .etc... my engine vacuum was 19-20 (green zone on the vac gauge). I called Edelbrock and they told me to put in the silver spring into my 650avs2. Runs fantastic .

[pacbrian]

i am guilty never think about them after they goes in the first time. great tips

[AbstractDreamz]

I used your videos extensively to set up a 350 SBC with a 1411. While this is not ideal, I did not want to buy a new carb since the 72 Blazer will be getting a gen V L8t motor soon. The 1411 was on the Blazer when I bought it. It now runs pretty good and my AFR gauge reads about where I am happy. It took a while to find the right combo but I am feeling good about it. 104main jet/100 secondary, 68x47 rod and plain spring

[TheCamaroking]

I have one sticking in the jet on one side and once engine is up to temp it idles rough and loss of power and when reving it up cold or warm I hear a whistle like a vacuum leak. Sprayed base and nothing leaking. Works great when engine not fully up to temp

[superdaveharley]

Excellent stuff, i have an edl on my 1982 Camaro. Putting a edl performer eps on this weekend with a melling mtc1 cam/lifters

[elchapoyo]

Great Video, Thanks for taking the time to upload all these Videos.

[travis]

Great video
Thanks for the education
THANK YOU

[ShawnD]

With regard to removing the spring/piston/rod and just running on the jet, besides running extra rich and being unable to install a sufficiently small jet, you'd be creating an internal vacuum leak since the piston is no longer there. Sure, the piston doesn't have rings and doesn't really "seal" to its bore, but it does provide an impingement. After all, if it didn't, it wouldn't be pulled down by vacuum in the first place. I suppose the piston could be installed by itself, but that would do nothing for the rich mixture.

[michaelbradley]

Just spent 2 days tuning my buddies 77 351m with an afr and have it dialed except for one specific throttle input cruising slight load and WOT is spot on but i could not fix a rich condition at around 2/3 to 3/4 throttle didnt matter ifbi had the rods set for the leanest setting with the lightest spring it still maxes out the afr at 10 to 1 at that specific spot this is with and edelbrock 1406

[landoncustomclassics]

I just ordered an AVS 2 for my 62 tbird with a 390

[tomreyn]

Been driving w my 1406 w AFR, Tach and VAC gauge on the dash for almost 3 years now.
Fat old Dodge. Cruise and tow.
Lookin for MPG & Tow power.

Noticed some stuff.
* jet. Jet.
* timed enrichment.

- nothing is perfect. - more of a compromise.
Keep it in the middle AFR - 11.5 to 16 seems to work.

[AdamDixonSR]

If you will put that distributor on manifold vacuum, it will be a lot more responsive and have more vacuum at Idle. I know that this was only demo purposes but that would be a good video to show people.