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I put a new motor in a 68 camaro. Nice cam and heads, holley 600 carb. I have to idle the engine at about 900-1000 rpm to keep it running because of the lope of the cam. When I put it into gear it wants to die, I have to 2 foot it to keep it running. What do I have to adjust on the carb to fix this? Thanks a lot

Tim
 

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how big of cam did you put in it ?if it is a big cam you half to put a bigger stall conveter in atleast 1800 rpm the only other thing you could do is make the engine flood and you dont want to do that.

[This message has been edited by DEVIL'S LAKE (edited 08-29-2000).]
 

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Sounds like your motor may just be fighting your convertor at idle. How bad does the car creep if you left off the brake?


------------------
Mark
1992 Firebird 355/Six Speed
1991 RS 350 / 700-R4
1987 Toyota Pickup 383 / 500 + HP
**How fast is just a matter of how much $$$ **
 

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Hey Guys,
I think this might be a classic case pertaning to ported/manifold vacuum. I am not being smart the converter is most likely the culpert, if the cam is big enough and the butterflyes are open just to the right place you will lose most of the ported vacuum when you drop it in gear. The problem could be, because of cam size butterflies are open just enough to get enough vacuum at ported port to start vac adv to move and because of converter RPM'S drop enough to loose vacuum at ported port, thus also retarding timing making a progressive problem. Try manifold vacuum.

I will use Holley to explain how I have delt with this problem. This works best on a Holley because they have a rich idle circit(sp) anyway. It is best to remove the carb(and of coarse we all know to pull a bowl screw to drain the carb, and don't turn a Holley upside down) there is a screw in the base plate on the secondaries,(rear butterflies)on the passenger side, that would appear to be an idle screw(you can see it on the top side of the baseplate next to where the linkage hooks from the secondary diapharam). Using a small screwdriver turn the screw 1/2,to3/4 turn clockwise,or to increase rear idle speed.The screw will be hard to turn so use a good screwdriver. Now here is the result the idle speed has been increased from the rear so you can decrease the butterfly opening and the idle speed will be the same as before,except the rich condition is gone,air bleeds function,and and the ported vacuum port is working like it is suppose to if you need it.

Good Luck
Larry
 

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Where I talked about results in the last paragraph of my last post I didn' say to decrease idle speed in the FRONT or primaries,to attain same idle speed as before.

Larry
 
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