kgkern01

iTrader: (10)

So I've got some minor blowby at high RPM (4000+) that causes smoke at WOT, and causes my wideband to read rich once the smoke starts as well. Plugs show no signs of oil, shortblock has 57k on it. I saw where some turbo Buick guys have used LT1 AIR pumps as vacuum pumps using the Racetronix wiring harness and a Hobbs switch at a given boost psi. What I was thinking was a similar setup but using a WOT switch, like is used with nitrous, to kick on the pump, and of course, an air/oil separator inline as well.

What do you guys think?

wrd1972

iTrader: (12)

If its blowby, time for a rebuild.
Done.

jasonisdn

iTrader: (1)

i would do a leak down test first.

BlownEarDrums

iTrader: (2)

Check/Change your PCV valve.

kgkern01

iTrader: (10)

PCV is functioning fine, new valve, with an inline separator to remove the oil, breather on each valve cover.

jasonisdn

iTrader: (1)

i know the oil is your concern right now but if you have blow by, you are losing power. do a leak down test and go from there.

gregrob

iTrader: (8)

What makes you positive its blowby ? Thats not the only way it could be burning oil...

kgkern01

iTrader: (10)

Well I'm not positive it is blowby, that is what I assume it is since I get some oil smoke at WOT, and get a sllght oil film on my exhaust tips after going WOT. My plugs show zero signs of oil though, which is strange to me if it is blowby. What else could cause oil in exhaust other than blowby?

gregrob

iTrader: (8)

Valve seals, rocker stud seal on ported heads intake manifold gasket.