340 Initial timing questions

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JMO, your initial is in the ballpark of what I'd expect for that cam. 20-25*

900-1000 is good for idle speed too. Autos can be finicky. The bigger deal is what is the drop when put in gear. If it's 50-100, you are good to go. If rpm drops 250+ you have issues somewhere.
 
512Stroker said:
Do have the P/N or a link to your Voodoo cam I cant seem to find it
Thanks in advance
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512Stroker, yes the cam # 30200740 (Grind # VS50-VS52-110) I'm really happy with it. Lunati describes it as "Excellent hot street/strip cam with great torque and HP from low to high end." And they rate the power band 2400-6600, but it pulls pretty good from 2000-2200 or so, makes it very liveable on the street. I'm using a PTC 2500 converter which is working well. More stall might make it quicker off the line of course, but this is a nice street set-up.

crackedback said:
JMO, your initial is in the ballpark of what I'd expect for that cam. 20-25*

900-1000 is good for idle speed too. Autos can be finicky. The bigger deal is what is the drop when put in gear. If it's 50-100, you are good to go. If rpm drops 250+ you have issues somewhere.
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Thanks, and yes, I'm pretty sure the idle drop is in the 50-100 range.
 
I think you have kinda hit on a combo that's "off the map". It runs so well, IMO because it's a solid camshaft. If it was a hydraulic with the same specs, it'd lose a lot on the bottom end. Hydraulics "act" about 10* bigger duration than a solid with the same numbers. I think that's what makes it a good matched combo. At least one of the things. This just proves what I always say.....there's more than one way to get the job done.
 
AJ/FormS said:
I'm busted,lol.
But just to maybe ease your mind; my cam is an old Hughes HE3038AL flat/hydro. Specs are 276/286/110 and lifts of .549/.571 (1.6arms) and using their 1129 springs shimmed up some; enough to hit over 7200 without losing control.
The thing is, this engine has accumulated over 100,000 miles. The idle has never been set higher than 750, usually 700 (stick-car), and it has spent probably dozens and dozens of hours at 700 down to 550 rpm, cuz you know how those cams sound idling around at the car shows with retarded timing,lol.
However, I made a couple of mods, cuz, like you I was worried about the lobes. I increased my oiling to the topend for spring cooling, and cut some drain-back channels in my Eddies, and I drilled holes beside every lifter bore to let those factory junk-collecting low-spots dribble oil into the cam tunnel. Additionally I run a high-volume pump with a Milodon 7qt roadrace pan, and it's pick-up. And lastly, I always add one small bottle of ZDDP at every oilchange running any old dyno oil. I'm not kidding; whatever is on sale.
So with over 100K miles on her, Ima guessing it's working.

I don't run vacuum-secondary carbs anymore. Or carbs with air-valves. I'm not dissing them, I just like my 750DP; my car does what I ask it too, when I ask it too, and it's totally controlled and modulateable with the pedal.
Oh, she's a 3.09low Commando box with a GVod, that I use as a splitter. She runs 3.55s and 65=2240rpm (this is 110kph our Manitoba highest speed-limit, only found on the TransCanada hiway).
The fun gear is second gear where 32mph is 2700; well it is when the tires aren't spinning.That's one of the advantages of VP around 155

I'm glad you got the off-idle tip-in sag cured; that can be really annoying.
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AJ, what are those springs rated? I'm running Lunati's 73195 dual springs, with seat load of 115@1.70" (but shimmed to 1.66-1.67) and open of 336#@1.150". Haven't tried to figure out what they are shimmed. (They list them as 402#/in rate.)

This AVS2 650 is a nice carb, very responsive with the annular boosters. One of these days I still might try a 650/750 double pumper. I haven't run a Holley for a lot of years, but may have to try one if I get bored or something.:D

And you say you've got over 100K miles on the motor, is that with the same cam or??
My old lazy grind lasted really well, but I don't know how the Voodoo faster lobes will compare?

Any comments from anyone on the newer fast lift cams for life span?
 
HUG 1129

DUAL VALVE SPRING SB

145# @ 1.800" / 358# @ .550" LIFT (PAC SPRING)

  • Installed Height/Pressure: 1.800"--145#
  • Pressure @ .550" lift: 358#
  • Pressure @ .600" lift: 375#
  • Pressure @ .650" lift: 400#
  • Pressure @ .700" lift : 425#
  • Coil Bind: @ .750" lift
  • Outer Spring ID/OD: 1.075" /1.459"
  • Inner Spring ID/OD: 1.078" / .794"
  • Type of Spring: Dual
  • Retainers: 5/16" -1278 : 11/32" - 1201

    Spring Rate 391
 
midnight340 said:
And you say you've got over 100K miles on the motor, is that with the same cam or??
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That is the third cam.
The first in 2000,was the Mopar 292/292/108 which I didn't like, pulled it and sold it before the end of the first summer. Next was a Hughes HE2430AL that lasted til spring of 2004 and dropped lobes when they took the ZDDP out; I loved that cam. The HE3038AL has been in there ever since; ho-hum til Rs get up; (remember I run 3.55s).
I loosened up the skirt clearance in about 2002 and installed Plasma Moly file-fit second rings in end of 2004IIRC. The rest is as it was in fall of 1999 when it went together for the first time. Oh except in 04 I shaved the decks some more.
 
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