If you mount your turbos above the valve covers or above the Heads then how do you get enough oil volume and pressure to it? DO you tap into the oil pressure sensor and then run a line to the turbos? Or do you have to get an electric pump for it? Also if you mount them below like callaway style could you do the same thing by tapping into the oil pressure sensor? Thanks for any suggestions or help or even pics :chevy

 

You can tap into the oil pressure sensor port as you described. Alot of people also tap into the lifter galley via the pipe plugs at the front and rear of the block. The front plug, to the top left of the timing cover, is usually a convenient location. Turbos don't really need a large volume of oil or much pressure, too much of either could overwhelm the seals leading to oil in the intake. Oil in the combustion chamber increases the chances of detonation.

A -04 line is sufficient. Feeding pressurized oil to the turbos is the easy part, locating the turbos so that they easily and properly drain is usually more of a challenge.


[Modified by Monty, 8:37 AM 1/19/2003]

 

I heard that if you have a turbo setup and you run it hard for a day you should let the car idle for a couple of mins so the turbos can cool down and stay lubed with oil, is this true?

COuld it be better if you have a seperate electric oil pump to pump oil to the turbos even when the engine is turned off to let it cool? Thanks for the info also how big is a A-04 line? I never heard of sizes like that :confused: ;)

 

Yes, they're referring to the prevention of oil coking the turbo's bearings. After you've run the car for awhile, especially if you've been spooling it up, let the car idle for a couple of minutes before you shut the engine off to help cool the turbo bearings with oil. This wll prevent the oil from coking(overheating and solidifying) inside the bearing housings, eventually clogging it and leading to serious turbo damage. Quality synthetics and racing motor oils are less susceptible to this. You'll hear some people mention turbo timers, they are an electronic device that automatically does this for you.

If you let the turbos cool down before shutting the engine off you won't need any special prelubers, electric motors etc. Keep clean, high-quality oil running through it and it will last. All the electric motors are going to do is add complication and weight.

AN refers to Army-Navy and is used to designate standardized reusable fittings, hoses, adapters, etc. The -XX name refers to the size of the fitting, hose, etc in 1/16" increments. -04 refers to a AN hose/fitting size roughly equal to the ID of a 1/4" pipe. A -06 is 3/8", -08 is 1/2", etc. Most people plumb the oil to and from the turbos with AN fittings and hose because it's simple and works well. A 1/8" pipe to -04 AN adapter will screw right into the bearing housing, and most of the turbo companies offer a bolt on -10 adapter for the drain.

 

Thanks for all your help, I love this forum I get to talk to cool people who have done wild mods like your before and I could get info from them, Thanks Monty.

So hows your car going? EVer get it past the 5psi mark, well do you think the Dana 44 will hold up to the job, Merlin522 gots a IRS but he hasent pushed it to hard so I dont know if it can stand up to it. Also what kind of tires will you use with your car? 345's in the rear or are they going to be wider? BTW thats a really, really cool Corvette :yesnod: :yesnod: :yesnod:

 

No problem, thanks for the compliments.

I should be "done" with my car this weekend. I picked up my headers from a local ceramic coating shop yesterday and started putting the turbo system back together. Once I get it all back together, I jsut need to put my seats back in and I'm road ready when Spring comes. I'm working on a few other small projects, but nothing that will keep the car off the road.

I swaped out the 20# wastegate springs I used on the dyno for 7# springs for street use. I can raise the boost pressure up to 20+psi with the boost controller but it's too much power for the street/tires. I prefer a stock appearance so no fender flares or body kits for me. The largest tire I can fit w/o body mods is a 315 in the rear and 275 up front, so that's what I'm running. I think with road racing type tires in those the rear end will hold up as long as I use some common sense. I have Tom's Differentials 30 spline, 1350 ujoint spindles, yokes, and halfshafts. I don't drive the car that hard really, and it wasn't built for racing; just cruising around and having fun. I don't car about 1/4 mile times, etc although I am going to take it to the track this spring out of curiousity. Everyone keeps asking.....

 

How much money and time have you invested?? :confused:

 

Time and money? Too much. I've never really added it all up, but it's been a work in progress over the past few years, so it's not like it was one big expense.

 

...hanging on every word trying to learn as much as I can. Very interesting.

 

Could you post some pics of your Callaway TT Corvette?

 

I would like to do that, but, I do not have a clue how to do it on this forum. What would you like to see and I will email you directly. I appreciate your interest in the turbos. If it were not for my son (age 14) we would have a low mileage, triple black, LT4, convertible, instead of our low mileage, '87 CTT. He really wanted the Callaway TT. I do like it a lot - but, gotta tell you, it worries the dickens out of me if/when it needs repairs.

 

I would like to see a pic of under the hood, and maybe a shot of the intercoolers and plumming, you could send it to LAZ894@aol.com Thanks for the help :yesnod: