Quote:
Originally Posted by 85burb
When you say back them off is that in or out. You think the main jets will be rich out of box? But they say they are dialed in out of the box....  |
You will be leaning out the mixture so to increase vacuum you will be turning the mixture screws clockwise, which will be tightening the screws. When you hit max vacuum then turn them counter clockwise to back them off until the vacuum just starts to drop.
If I remember right they jet the 3310 for a mild 454 and the 1850 for a mild 350 so your jetting will be off a bit. If you re-jet it you may also need to change the squirters and maybe even the pump cam to reduce the pump shot volume so it doesn't rich bog on you. You can look up the jet size, pump cam & squirter size they put on the 1850 and use them as a good guide line to get you by for a while without spending a bunch of money on trial & error getting it right.
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miSSed opportunity - ground up creation of an AWD 1994 454 SS that never was
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69 C10 shortbed stepside 400 small block - built like what a super sport truck could have been
69 K20 lwb TBI 350 4L60E NP208 14-bolt Dana-44 w/disc
68 Camaro SS / RS 500hp 439 inch roller cam big block 4L80E
79 Malibu TPI 350 4L60 w/ Z28 steering & sway bars