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Old 01-03-2015, 03:25 AM   #1
campingman
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Join Date: Dec 2014
Location: Lexington
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Need some opinions

I seem to get great advice from this site and seem to always come back to it.

Just finished up my Small Block 350 1975 all stock. Want to make sure my readings are correct on this thing. Haven't worked on a small block in over 20 years and need a refresher or just to make sure I got it all set up right.

Got the Air/Fuel mix at the highest vacuum reading
Vacuum reading from the intake hoses is a steady 17psi
Idling at 650rpm warm 1200rpm Cold
Plugs are gapped at .045
Timing is at 8 Degrees Idle (very hard to time cause its a van)
Oil pressure guage is reading 25psi at 650rpm idle. goes to 30-35psi at 3000rpm (it read 20psi at idle with 10w 30 in it. put 15w 40 rotella in it and it went up to 25 psi at idle)
Temp reads 180 degrees at idle. hardly goes past 195 degrees

69.000 miles.
Runs super quiet and very well. can't hear nothing from the engine.other than the fan blowing. no knocks, no pings, no hesitating. runs beautiful.
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Old 01-03-2015, 04:54 AM   #2
rich weyand
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Location: Bloomington Indiana
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Re: Need some opinions

That all sounds pretty good. Couple tweaks, maybe. For automatic, stock idle setting is 700 rpm. You don't say what kind of plugs you are running, but they should be ACDelco R45TS or Autolite 24. Timing at 16* BTDC will give you more bottom-end performance, and should not cause knocking. As long as oil pressure is 10 psi per thousand RPM, you're good. Sounds like going to 15W40 is a good move to ensure that. You should probably add zinc to any modern oil you use, such as one bottle of ZDDPPlus per oil change.
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Old 01-03-2015, 05:24 AM   #3
campingman
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Join Date: Dec 2014
Location: Lexington
Posts: 15
Re: Need some opinions

Sounds so good at 650rpm. lol. I put it in gear and it drops down to 600. Sounds like a purrring kitten lol. I used the Autolite 145 plug per summit racing with new set of autolite wires and summit brand cap and coil. Major startup improvement. went from 10 cranks to just a few. Im going to climb a hill tommorow with it to see how well it does. might change the timing. Its a 1975 G35 Vandura Rally Camper Special lol. Its pretty big. 4.10 rear with th350. if it pulls the hills well, Im not going to worry about it. only time im taking it out is in the summer for camping and its going to have to climb the hills to get to the sites. That Rotella T is the only oil i ever use in my 4.3 and 5.7. My 4.3 Jimmy motor went up 10psi adding it when I first got it. its a 1999 with 180k on it. Seems to be really good oil. I've also ran it in toyota 4 bangers and it really perks them up lol. some give me grief for running it in gas engines but ive never had a problem with sludge or anything throughout the years.

Last edited by campingman; 01-03-2015 at 05:30 AM.
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