I have black powder on my tailpipes and I get horrible gas milage, so I figure I am running rich. Could this cause my car to be slower, I G-Teched it with the windows down and ran 15.75 1/4, I would think my car should at least be in the high 14's. Any ideas as to what I can do.

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'86 IROC
T-TOPS, TINTED WINDOWS, BRAKE LIGHT BLACKOUTS
GM GOODWRENCH 350
EDELBROCK TES HEADERS
FLOWMASTER
EDELBROCK 600CFM CARB.
KN AIRFILTER
ACCEL HEI DISTRIBUTOR
160* Stat
2:73 GEARS
Rebuilt 700R4, with manual valve body
B&M Megashifter
Soon to be installed
Exhaust Cut-Out and different gears, either 3:73 or 3:42
"There is nothing more addicting than speed"

 

Two things to check for the rich condition, advance curve in the HEI and the Carb

But mid to high 15's w/2.73's and a 250?? HP motor seems about right to me, anyone else?

 

But I thought 3rd Gen Camaros with a 350 and I think 220hp were running low 15's right?

------------------
'86 IROC
T-TOPS, TINTED WINDOWS, BRAKE LIGHT BLACKOUTS
GM GOODWRENCH 350
EDELBROCK TES HEADERS
FLOWMASTER
EDELBROCK 600CFM CARB.
KN AIRFILTER
ACCEL HEI DISTRIBUTOR
160* Stat
2:73 GEARS
Rebuilt 700R4, with manual valve body
B&M Megashifter
Soon to be installed
Exhaust Cut-Out and different gears, either 3:73 or 3:42
"There is nothing more addicting than speed"

 

How do I check the advance curve?

------------------
'86 IROC
T-TOPS, TINTED WINDOWS, BRAKE LIGHT BLACKOUTS
GM GOODWRENCH 350
EDELBROCK TES HEADERS
FLOWMASTER
EDELBROCK 600CFM CARB.
KN AIRFILTER
ACCEL HEI DISTRIBUTOR
160* Stat
2:73 GEARS
Rebuilt 700R4, with manual valve body
B&M Megashifter
Soon to be installed
Exhaust Cut-Out and different gears, either 3:73 or 3:42
"There is nothing more addicting than speed"

 

That sounds about right..... one question, why do you think you may be running rich??? and if you are...use cam II 120 octain when your at the track that will clear you prob right up

COdy

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Wieand blown 87 camaro

 

I think I am running rich because I have black powder on the tailpipes, poor gas milage and white smoke under WOT.


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'86 IROC
T-TOPS, TINTED WINDOWS, BRAKE LIGHT BLACKOUTS
GM GOODWRENCH 350
EDELBROCK TES HEADERS
FLOWMASTER
EDELBROCK 600CFM CARB.
KN AIRFILTER
ACCEL HEI DISTRIBUTOR
160* Stat
2:73 GEARS
Rebuilt 700R4, with manual valve body
B&M Megashifter
Soon to be installed
Exhaust Cut-Out and different gears, either 3:73 or 3:42
"There is nothing more addicting than speed"

 

And a blown head or intake gasket.



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"Question with boldness even the existence of a God; because, if there be one, he must more approve of the homage of reason, than that of blind-folded fear."

-Thomas Jefferson

 

Before I get into this, I'm assuming that with the aftermarket carb and the Accel HEI, you're running vacuum advance? and that the ECM is no longer active?

 

Correct.

 

Check the spark plugs too, in order to help confirm the rich condition. If the engine's running rich, the plugs will be black with carbon build-up.

Check the carb to make sure that the choke is fully open when the engine is hot. Then go through the Edelbrock manual that came with the carb; it'll help you go through the diagnosis and adjustment procedures. (ex. set float height, check for excessive fuel pressure). You might also try changing the accelerator pump to it's shortest travel setting (the manual will show how). If everything else checks out, then get an Edelbrock carb jet/rod kit and go from there. Install leaner main metering rods first, that's probably easiest. But don't worry, even jet changes are no big deal on that carb. It's easy to disassemble and everything... just don't lose those *$%#@ little clips that hold the linkages! Spread a towel out around the carb to catch stuff you might drop.

Well, that's about all I can think of right now. Let us know how things are comming. Good luck!


(oh yeah, and if the head gasket were blown, it'd probably be really running like sh*t, so don't sweat that too much. If you're losing coolant and you don't find any external leaks, then yeah it could be the head gasket)