3rdgen Fbody with 3500 heads

[IsaacHayes]

Hey every little bit is progress. Shouldn't your valve covers be switched on the final version for PCV?

The 3500 plenum just looks like it belongs RWD.

[Joseph Upson]

Are you going to run a return coolant pipe from the back of the engine or turn the intake manifold around so that it comes out front in "U" flow fashion?

You should build a twin turbo setup and have the turbos peer through the hood a little bit.

[ForcedFirebird]

Are you going to run a return coolant pipe from the back of the engine or turn the intake manifold around so that it comes out front in "U" flow fashion?

You should build a twin turbo setup and have the turbos peer through the hood a little bit.

Issac, Joseph, yes the LIM will be turned around, that's how it is mounted on the new engine, but the timing cover interferes withe the timing cover and din't feel as though as there was a need to remove it just for fitment.

I really don't want to cut holes in the hood, and am trying to plan a way that the turbos can fit above the valve covers so they can drain into them. I think I've got it planned, but will definately need some blankets for them to keep the paint from baking off the hood.

Also look at it today, I'm probably going to have to go with a signaw type (3x00 with remote reservoir) P/S pump to help make room on the driver's side for the cold pipes, and my current alt location sure sin't going to work, it's right dead center of the turbo inlet.

The oil dipstick is another issue I never even thought about, and will have to be addressed in some fassion.

As far as the PCV, these are just mock-up parts and it is one of the least of the worries. I really wish I had the cash to get in on the recent tubular k member group purchase, then a lot of these issues would have dissapeared since not only could I use a full 3500, but I could lower the engine by nearly 2", and have more room under the engine for down pipes.

Ahhh, the saga continues....

[Joseph Upson]

Having the return oil feed into the valve covers would be a convenient method, but why would you want all that hot oil dumped on top of your cylinder head? Think about it, you will put considerably more oil on top of the cylinder head than what is generally pumped over the rockers, not only that, during a high rpm run you may pump enough oil on top of the head to cause it to back up into the drain tube since the gravity drainage may not be fast enough to accomodate two sources of oil.

When it's hot oil flows through the turbo pretty fast as I've noted from a test of sufficient oil flow to the turbo by allowing the drain to feed into a container while cranking over the engine.

[ForcedFirebird]

I've also thought about that, but I knw many V8's have used this methid and figured I would have heard of a problem. I also know how much oil comes out of the turbo, I lost several quarts with a leak on the first kit I built.

The oil is going to be hot weather or not it goes to the pan or heads after the turbos, unless I impliment a cooler, I can't see it cooling off much before making it back to the pump in my proposed idea.

[Joseph Upson]

I've also thought about that, but I knw many V8's have used this methid and figured I would have heard of a problem. I also know how much oil comes out of the turbo, I lost several quarts with a leak on the first kit I built.

The oil is going to be hot weather or not it goes to the pan or heads after the turbos, unless I impliment a cooler, I can't see it cooling off much before making it back to the pump in my proposed idea.

The concern is a small amount of hot oil verses a lot, providing a hot isulation effect, a mist of hot liquid on your skin vs a few ounces of hot liquid on your skin, that's a big difference in heat transfer and since the oil coming out of the turbo will be hotter than the oil that has circulated through the engine, it would be cooler pumped from the pan mixed with lower temp oil than what is comming out of the turbo. The V8 cylinder heads have a lot more surface area than the V6 heads. My engine oil temps are creeping up toward 240 deg. I need all the anti-detonation benefits I can get. When I did the twin turbo IROC years ago, I ran the drain down to the pan.

Just some concerns I thought you should consider.

[ForcedFirebird]

Yeah i also wasn't thinking of the detonation issues, my compression is a tad on the high side.