392 International low oil psi - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 09-07-2007, 04:01 PM
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Exclamation 392 International low oil psi

I have just registered and am looking forwrd to talking to some inteligent Scout owners
I have a Scout with a fresh rebuilt 392.I had the heads ported and i installed a ISKY raceing cam with new pistons and rings.I had it out last weekend and as my old 345 did my oil PSI dropped off on the stock oil gauge.As soon as i idle it up it jumps back up?? Any one else run into this situation ?
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post #2 of (permalink) Old 06-16-2008, 06:46 PM
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Did you follow these instructions?


Important message regarding "break in" protection for all high performance flat tappet and solid lifter camshafts.

........government regulators have mandated as of Jan 04 the complete elimination of the critical anti-wear additive package (zinc/phosphorus) from all "SM" rated (street legal) motor oils to protect catalytic converters.

Isky recommends the use of only the following oils for maximum cam lobe and lifter protection before and after the break in period because they are the only conventional mineral based oils available with generous levels of the zinc/phosphorus additive package.

Brad Penn Penn-Grade 1 ** The very best in our opinion and the only oil refined from 100% PA crude.

Pennzoil "GTP" Racing Oil (Excellent. Do not confuse with regular grade of Pennzoil)

Valvoline Racing Oil (Excellent. Do not confuse with regular grades of Valvoline or Valvoline VR-1)


If you do not use one of the above oils, the next best approach is to supplement other common mineral based oils with EOS (Engine Oil Supplement) available from any GM dealership. .................

Special Note Regarding Synthetic Oils

Please note, Isky does not recommend the use of synthetic oils with any flat tappet camshaft especially during break in. If you must use synthteic oil after break in, there are only two brands we are comfortable recommending. They are Amzoil [sic] (Red) racing Oil and Joe Gibbs Performance Racing Oil. Both contain zinc and phosphorus and will fare well AFTER break in has been successfully completed. Other synthetics, especially those with very low viscosity index numbers (i.e. 0W-15, 5W-20, etc) have very low film strength and are not designed for, nor should they be employed in any flat tappet cam installation.

.....................remember to immediately rev to 2500 RPM and keep it there for the first 15-20 minutes of operation...................
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post #3 of (permalink) Old 06-16-2008, 06:48 PM
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It sounds like you have washed out your cam bearings btw. I hope not, but it's that or magic. People tend to be skeptical when I say it's magic.
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post #4 of (permalink) Old 07-27-2008, 08:58 PM
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Did you do anything to the oil pump? The stock oil pumps can be boosted up by adding a washer behind the spribg. It hepls boost the oil preasure, but it does not boost the volume. Not sure if this helps.
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