429 question
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Joined: Nov 2003
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429 question
i have a 69 429 with a 4u crank, but i have d3ve heads!
first of all i have a low budget ( grumpy wife and 2 kids)
i want to get some info, 1; can the smog bump be ground out with ease (not getting into any water jackets?)(and is it worth it) 2; is the 1969 timing chain 4 deg. advanced? (over the 73) & 3; what is the highest compression pistion i can run on pump fuel
first of all i have a low budget ( grumpy wife and 2 kids)
i want to get some info, 1; can the smog bump be ground out with ease (not getting into any water jackets?)(and is it worth it) 2; is the 1969 timing chain 4 deg. advanced? (over the 73) & 3; what is the highest compression pistion i can run on pump fuel
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Joined: Aug 1999
Posts: 1,485
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1. The smog bump can be removed, with ease(?) its a lot of work but yes its worth doing. 2. 1969 timing is strait up. 3. Compression and pump fuel depends on many factors, quality of fuel, proper timing and tune, air temp., iron or aluminum heads, cam timing and overlap, etc. Normally, 9-1 on regular (87), 10-1 on premium (92-93) is a good rule of thumb.
Nathan
Nathan
