I am running 110 octane Turbo Blue race fuel in my 11 to 1 compression 454. It is in a 69 Camaro. My question is abour possible oil conamination. This is my first motor high compression motor. It is smoking at high RPM, above 3500. It does not smoke until you stab it and bring the rpm's up to 3500 and higher. I have been shifting at 6200 and she leaves a trail of smoke until I bring her down below 3000 RPM's or so. Once below that she clears up. I drained the oil and the oil have a gas smell to it. There is like a very light haze in the oil and smells like Turbo Blue. Do I have bad rings? Please, any help/ideas is greatly appreciated.

If you're using a PCV system make sure you're not drawing oil through the baffles in the valve covers. Pull the hose off and see if it's wet inside.

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'69 RS Camaro
355 5-speed 4.11

What do the plugs look like? If your pcv is put straight into the valve cover without a baffle, you're more than likely sucking oil in under vacuum. Are you using oil?

I was going through 1 quart every 600 miles. Plugs looked like crap. I bought one of the valve cover plugs with the slit in it for $1, made a sleeve for the pcv valve so it would sit tight and my oil consumption stopped. Cheap, easy fix.

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Rick Dorion
69 RS Conv,355,M20,4.10's and I don't worry about stone chips ( yet ).

Your question cannot be answered with the information that we and you have.

I have seen high volume oil pumps fill up the valve covers and come down the valve guides and have that symptom at high revs. Keep in mind, that at WOT there is no vacuum to suck oil into the Pcv system.

My advice to you is to collect more dianostic information such as static compresssion readings (even tho static compression readings per se will not be as accurate about oil sealing....but may give you another piece of information), plug readings (is is one two or all cylinders etc) and report back to dissiminate this information. Are you using a HV oil pump? Have you completely disconnected the PCV system? How old is the engine job? Did it start to do this all of a sudden?

Gasoline in the oil can come from two differing sources. One is the fuel pump diaphram leaking into the oil...not good, and the other is too much fuel to the chamber washing down the walls, but I would think it would run terribly with that scenerio.

One last point, why are you using 110octane for a relatively tame 11 to 1? I think you could get buy with alot less, mixing and saving some $$. Let's say 96ish, depending on head material, timing and dynamic compression ratio!

Check out www.inccn.net/jackstandslinks.htm (http://www.inccn.net/jackstandslinks.htm) and look at some of the fuel/octane related sites on that page.

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STEVE JACK
ConceptOne Pulleys and Brackets

Northern/Southern Rodder Magazine's "Jack'Stands" author and creator
Techical forum/links at www.inccn.net/techforum.htm (http://www.inccn.net/techforum.htm)


[This message has been edited by HOTRODSRJ (edited 07-21-2002).]

Hopefully I can clear some of this up. The motor is a LS-6 crate 454 I had it disassembled and balanced/ blue printed. The block was trued (decked) and the heads bowl blended, I had a milder solid cam intstalled (304/314 dur, 348 dur at .050, 544/567 lift). The motor sat for 9 years before it was fired. I primed it before I started it and she fired right up.

It is fowling the number 3,4,and 5 cylinders. The other plugs are clean with a light tan coloring. I have not fully disconnected the PCV system yet. I am running a Holley red pump with no regulator. The motor runs good but has a slight miss at cruising rpm 2500 to 2800. The oil pump is the original from the crate motor. I ran a cold compression check and the lowest cylinder was 174 pounds and the highest was 177 pounds.

Hope this helps alittle.



[This message has been edited by Nubs69 (edited 07-21-2002).]

[This message has been edited by Nubs69 (edited 07-21-2002).]

The oil rings in your bad cyl. may be stuck from sitting.

Sounds like it is rich on the jetting. Didn't see the post about the plugs, could be leaking guides or intake gasket if there oil fouled.

[This message has been edited by 1bad67 (edited 07-23-2002).]

hey you say the motor sat for 9 years before starting, did you do any type of break in??? even crate motors need the normal 20-30 minute break in of 2000-3000 rpms, then should be driven at varying loads for 500 miles, but anyway, goodluck with your engine
just my thoughts
Jake

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1968 Camaro convertible, 454,th400,3500 stall,8.5 10 bolt,3.90 gears

I'd tend to agree w' the piston rings theory. Put a lot more miles on it and I'll bet it will seal up nicely. I had a motor that didn't seal at all until I quit using synthetic oil for a while. Then after about 1000 mi. it was awesome.

Thanks for all your help. It was a leaking intake gasket. I pulled it apart the other night and you could see plain as day where it was leaking.