egk2005

need help setting the timing

90 gt 5.0 f303 cam, built gt40 heads, eagle crank, forged pistons, trickflow streetheat intake, 75mm throttle body, 75mm pro m maf, 24# injectors, pro-billet msd distributor,

wydopnthrtl

Depends on your compression vs octane.

Assuming you under 10:1 compression and running 93 octane.. start at 6deg base timing and go from there.

btw, in my testing with a knock sensor I found that 1 octane changes would equate to 1.75 degrees of timing. (ranging from 87 to 94 octane fuels)

Narleycarley

loosen distributor hold down just enough to be able to turn distributor, not enough that it moves on it's own (1/2" wrench or socket), attach timing light to #1 plug wire, pull spout, rotate distributor to 10* advanced for OEM specs, 12-16* is for a more advance timing that can get you a performance gain, just need to be mindful of detonation, with 93 octance probably can do 16*, I like 12-14* so I can still run regular.

mjr46

base from factory with spout out is 10, no reason to start at 6 and make it a true turd. and To the op... CHECK THE STICKEY TECH ARTICLES HERE, IT'LL TELL YOU HOW TO SET TIMING!!

egk2005

i have it set at like 20 degrees with the sport out with the spout in its like 28 degrees it will not run at all at 10-18 degrees

nitrous_bob

1) are you looking at BTDC ?

2) are you picking up signal from another wire that might be touching #1

if yes/no accordingly...find other problems and fix them, start with dumping codes