Warhead

Engine is a 355, Edelbrock Performer RPM top end w/750 cfm carb.

check out the idle HC's. Too much fuel ???

jim2527

I think you need to turn your idle screws out.

yellow 72

You're tryin' to pass emissions with this cam?

Good luck


Duration at 0.006" Lift: Intake: 308° Exhaust: 318°
Duration at 0.050" Lift: Intake: 234° Exhaust: 244°
Lift at Cam: Intake: 0.325" Exhaust: 0.340"
Lift at Valve: Intake: 0.488" Exhaust: 0.510"
Timing at 0.050" lift: Open Close
Intake: 10° BTDC 44° ABDC
Exhaust: 59° BBDC 5° ATDC
Centerlines: Lobe Separation - 112° Intake Centerline - 107°

AzMotorhead

You can do it.
Back timing down to Zero than lean out the carb a little.
Change the oil & air filter then take it through

FeedVaal

Great time to move to Oklahoma.

pbcanney

First Wisconsin, now Utah.. whats with these 3rd world countries probing 30 year old cars?

youre idling at 1100?

rihwoods

Here is my 78 L-82 (Calif )results...note allowable HC's at 15 mph (max 191) & 25 mph (max 159). Mine measured 17 & 16....You definately need some carb tuning...especially with the favorable criteria you have.....



Rich

TopGunn

I have a similar situation with my Q-Jet only my HC's are near 3400 at idle. I don't have to pass smog tests here but I had them test it because the thing always stinks of HC's when idling.

Anyway.............the problem turns out to be the idle circuit it the carb is actually lean and it's pulling fuel from another area making the thing seemingly run rich, it's actually running lean.

What carb are you running?

jackson

Carb probably needs work ... but are you sure you have enough vacuum & compression with this combo? Do you KNOW your true scr? Do you KNOW your vacuum?

Which head gasket? Which RPM heads: 70cc or 64cc? What pistons? ... and ... How far (if any) down in hole?