ok your oil pressures low once the engine gets warm

[grumpyvette]

ok your oil pressures low once the engine gets warm and you've got a crap load of miles on that Pontiac, so its time for a refresh, that older engine, theres plenty of good info on combos on this site and theres lots of good parts available.
oil pressure is a measure of resistance to flow rates, as oil heats the viscosity drops off and the oil gets thinner and easier to push thru tight clearances, your friends engine most likely has worn bearings like mentioned above, replacing the bearings BEFORE theres damage to the crank is an EXCELLENT IDEA.
swapping to a higher viscosity oil, example a 20w50 instead of a 10w30 will tend to raise the gauge readings, because of the HIGHER RESISTANCE TO FLOW but its done NOTHING about the basic PROBLEM of larger than ideal clearances, or the worn bearings,
swapping to a HIGH VOLUME oil pump will also tend to raise the gauge readings, because of the HIGHER RESISTANCE TO FLOW caused by a higher volume of oil being crammed thru the same clearances but its also doing NOTHING about the basic PROBLEM of larger than ideal clearances, or the worn bearings,if your going to replace the rings and bearings and probably the cam and lifters..., the stock intake is not the best available, the edelbrock rpm air gap is one good choice and the edelbrock single planes can give a big boost to the more radical combos
edelbrock makes some nice street strip heads also, do so research and rebuild that Pontiac before something wears beyond use or breaks

http://www.campbellenterprises.com/eagl ... er-kit.php

http://www.flatlanderracing.com/rebuildkitsbuick.html

http://ohiocrank.com/pont_rotate.html

 

[Randy_W]

the stock intake is not the best available

If it's a late 60's Pontiac intake and the combo is moderate street, there aren't many better. With a little clean up, only the very most modern designs will outperform it. The Pontiac 4 bbl intake is considered maybe the best factory intake ever built.

 

[grumpyvette]

naturally i depends on the total combo, but IVE had consistent gains from the VICTOR series intakes over ported stock Pontiac intakes, if the heads and cam would support the extra flow

heres a wide selection of stock and aftermarket intakes

http://www.teufert.net/pontiac/intakes/
the more common intakes like this just don,t really provide the flow necessary

http://www.edelbrock.com/automotive_new ... ctor.shtml

http://www.summitracing.com/parts/EDL-2957/

this intake and a 750cfm holley will do amazing things with the right heads and cam
2957 Victor Pontiac

 

[Randy_W]

I don't argue with that, but most Pontiac single plane setups are beyond what I think of as a moderate street combo, but those things are always personal interpretation. What we use to think of as moderate combos are milder by comparison with today's modern equipment. I was thinking of 400+ cu in, late style heads with big valves , 2.11 intake 1.77 or 1.66 exhaust, a little port/bowl work, general clean up, 9.2-9.5 c.r. with a 230ish split pattern cam. Cleaned up factory intake with a strong Q-Jet/Holley/Demon/etc... matched to the rest.