Adjusting the AVS secondaries

Well, the truck is finally running; time to start tuning the engine.

I'm running a pair of AVSs on an M1 tunnel ram; am pretty familiar w/ how to go about tuning the AFB. But I've never played with the adjustable secondaries on an AVS before, especially trying to get a pair set the same.

FWIW, the engine is a 383 with 'OOTB 'Source heads, 4.25" crank, a solid roller (262 deg @ .050), and the truck runs 4.10's with a moderate (~4000-ish) convertor.

Any suggestions how you guys go about dialing 'em in are appreciated, because you only get so many runs in a day...

-Bill

I think the Mopar service manual cals for 3.25 to 3.5 wraps of preload from straight up and down on the rear door. I have adjusted the doors looser until the car bogs and tighten in 1/4 turns until it stops bogging, also look at the stop so the door will be straight up and down at WOT

Hey Cab,

Thanks for weighing in on this.

Sounds like I've got 'em set waaaay too tight at 4 turns from after they close, if the baseline is 3.5 turns total!

But, remember, I have 2 carbs - does this affect where you'd start out at?

BTW, that cam you sold me is no good; it idles funny... not like it did when it was stock!

Seriously, it sounds bitchin' and feels like the motor is making more power at half throttle than it used to at full whack!

Of course, better heads and another 100+ inches may have a little to do with that as well...

I'm going to take the truck down to the machinist's place Mon to have new oil restricters made for the heads (was an afterthought - I put some into the feed holes under the rocker shafts) to cut down oil flow (that grooved #4 cam bearing combined w/ the Harland Sharp rockers allow a LOT of oil flow) so I have better idle oil pressure. Then I'll start playing with the carbs and timing a bit.

-Bill