Hey guys I have a 88 camaro with a 83 305. I recenty had my heads ported ad rebuilt. I then bought headers and switched out my edelbrock cam to a Comp Cam Magnum cam(224/224 470/470). I also have the a gear drive from edelbrock and manifold/carburator as well. My problem with this is I can not seem to get the car to run very smoothly. It is missing and hesitating.
From my understanding the timing is 29 degrees for this cam but my tab only goes to 12. So I've guesed on my timing a bit. Would this cause the miss or is that unrelated( maybe fouled spark plug )? What do I do to time this right? So far my edelbrock cam (207/214 440 gross lift I think) feels stronger which greatly disappoints me! Please help me, this is the first engine I've ever built up, and please no bagging on the 305 decision. Thank you.

 

if you kept all your ecm controls i'd say the gear drive is messing up the knock senser

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ICON Motorsports

1st & 3rd

 

ok i reread your post. you want to set the base timing at or around 6*-8*, the vacumn and or mechanical controls will advance it to the full advance

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ICON Motorsports

1st & 3rd

 

Sorry ede, I forgot to mention that there is no ecm. everything has been converted to no ecm. I timed the edelbrock cam fine, it's the change to the comp cam that's giving the trouble. The card that came with it said something about 29 degrees. Hope that helps?

Which vacume port on the carb should I use? It's a 600 cfm manual choke edelbrock, I believe the part # is 1405?

[This message has been edited by JC88Camaro (edited February 09, 2001).]

 

As far as timing it at 29 degrees, thats what they suggest at full advance right?? Not base timing.

As Ede said above, I would start at about 8 degrees BASE.

The Ported vac. source for the vac. advance should be the pass side front port.

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ASE Mechanic/Machinist/Smog Tech

1999 NBM Trans Am
1986 Chevy 3/4 ton pick up
1981 corvette
1995 Kawi ZX6R

GO #3

 

YES, that gear drive WILL mess up a knock sensor and retard the heck out of your timing. You just need to get a double roller set from Cloytes or Comp or somebody.

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1987 Chevy Camaro IROC-Z
L98 TPI 350 (5.7L)
TH 700R-4 Transmission
Borg Warner 7.75" 9 Bolt Rear End

Current Mods: LT4 Hot Cam, Comp Cams 1.52:1 Roller Rocker Arms, Edelbrock TES 1 5/8" Headers, Hooker 3" Aerochamber Cat-Back System, Performance Resource Chip, Accel Ignition Coil, Cap, Rotor, 8.8mm Wires, K&N Filters, JET TPI Air Foil, All Free Mods, Falken ZIEX Z-Rated Tires.

Best ET (w/o LT4 cam): 14.32 @ 97.7mph
(corrected for elevation)

7.5" 10 Bolt with 3.42s soon to come!

 

The degree numbers that are on camshaft cards are measured in crank degrees and pertain to the lobe position on the camshaft. Those numbers have absolutely nothing to do with your ignition/spark advance.

 

No ecm, no knock retard. Thats a myth anyway.

Set the base at 8 like everyone suggested.