There is no definite answer to that. The book will probably say 10* BTDC but I get the best performance and no pinging at 15-16*. I think the book is usually pretty conservative. This sounds old school, but you will get the best results by timing it to best idle, then backing it off a hair at a time if it starts hard.
If it is a -TBI- then the pump is mounted in the gas tank, but if it has a -4bbl- then it should be mounted on the engine block passenger side.
Go to the parts store and get the belts then loosten the alternator, power steering pump and a/c compressor and remove the belts measuring them as they come off to see which belt goes where.
8 degrees.
1970!!! Geez... "0" degrees I think. Better call your local auto parts dealer and ask to be sure.
Check these things first. Is fuel filter stoped up ?? Is it running out of fuel ??Ignition module in the distributor is a common problem with the HEI / High energy ignition system. It will work for awhile and then stop when it gets hot.
stock timing on a 400 small block Chevy 2/4 bbl engine is 4 degrees btdc. depending on how the engine is built however, i.e. rebuilt to stock or built for performance, the timing may be up to 8 degrees plus or minus tdc or more depending on valve timing and cam timing.
It depends on the year of the engine. here are some examples. Year . Carb Type HP Torque 1968 2BBL 250@4400 355@2600 1968 4BBL 300@4800 390@3600 1968 4BBL 310@4800 390@3600 1969 2BBL 250@4400 355@2600 1969 4BBL 310@4800 390@3200 1969 4BBL 325@5400 360@3600 1970 2BBL 250@4400 355@2600 1970 4BBL 310@4800 390@3200 1970 4BBL 325@5400 360@3600 1971 2BBL 240@4200 350@2400 1971 4BBL 260@4600 360@3200 1972 2BBL 175@4000 295@2600 1972 4BBL 200@4400 300@3200 1973 2BBL 160@3800 275@2400 1973 4BBL 180@3800 275@2800 1974 2BBL 160@3800 275@2400 1974 4BBL 200@4200 300@3200 1975 4BBL 160@3800 275@2400 1976 4BBL 170@3800 275@2400
I have a 1969 el camino 396 ss new holly 4bbl, timing set correctly, and sometimes gives a pop thru carb. please tell me the items to check over.
Either 170 hp w/5.0L 4bbl, 190 hp w/5.0L 4bbl H.O., or 205 w/305 TPI.
Depends on the year and the induction system. In 1964 389 4bbl was rated at 325Hp 389 tripower was 348hp. In 1965 ratings were raised to 335 for the 4bbl and 360 for the tri power. Of course all these were "gross" rating which cannot directly be compared to the sae net ratings listed from 1972 forward.
The base 305 had a 4bbl carburetor
150KM (2bbl) 170KM (4bbl)
checker auto store
The largest engine that year was the 350-4bbl V8.