Hi guys. After last years bummer dyno session and a few upgrades and fixes i though id start doing some carb adjustments, the reason i want to start adjusting it is while i was on the dyno they jettet the carb down to 72 in front and put a 134-21 metering plate in the rear. they told me it was alitle rich to begin with i do not know what jets that was there before. but before they did this change i felt a kick in the seat when ever i floored it and now there is no real omph. the dyno with the new jetting showes an avrage of 13,72 afr and is consistant but its to me lean. I opened the carb last night to verify this jetting i also noticed one of the primery jets where black stamped 72h while the other was bras stamped 72 i guess its the same but i thought id mention it. i hooked up CO machine and one side is richer then the other while trottleing to 1500rpm that is why i wanted to share this. I think i sorted the timing out its now 18 initial + 20 mech all in by 2600rpm + 12 degrees vacuum conected to manifold vac. I forgot to mention the PV is stamped 65 and there is a yellow spring for the secondaries.
some info about the car/engine:
Speedpro pistons l2240nf30
Edelbrock c396 intake
Holley 3310-6 carb
3904390 heads large oval port not ported with new valve job
Full length headers onto 3 inch collector onto 2,5 mandrel bend pipes
Lunati vodoo cam 60202 "10110702"
Info on the cam
[email protected] [email protected]
Adv 262. 268
Lift at valve
Th 400 trans
full weight 69 chevelle
27,2" diameter rear tires
I changed out the rear end gear sience last year from 3.08 to 3.73 it woke it up some in 1st but i feel the car would be slower in 1/4 mile thinking of installing a gear vendor next year.
I also changed out the "stock" converter that stalled at around 1200 with a TCI breakaway 2400 stall speed. i am thinking of going back to my old converter cause i feel this converter is all noise and no go to be honest, i am going to try and do a 60ft time and a 0-60mph to se if it is actually as slow as i feel but it stalls much higher then advertised. around 3000. its no problem driving with but when you floor it nothing really happens.
I have now written a small novelle so i guess i leave it for now and se what respons i do get.