hot air turbo seal.

[1dollardog]

One of my stock hot air turbos is seeping some oil. (I noticed it was a little oily when I installed it so I don't think this project has done it in). Nothing major but I blew off a hose and noticed it was pretty oily inside. That is probably why it slid off. No smoke from the exhaust. I know these have the carbon seal but can they be rebuilt with a different seal that wouldn't seap into this blow through set up?

 

[charlief1]

If it's a HA engine and you use anything other than a carbon seal it will allow oil to be sucked past the seal under vacuum conditions like letting off the throttle.

 

[1dollardog]

If it's a HA engine and you use anything other than a carbon seal it will allow oil to be sucked past the seal under vacuum conditions like letting off the throttle.

Haha. Hot air engine yes but not in the conventional configuration. It is a SFI blow through set up. Being its a blow through, I think I could use any turbo but can a non carbon seal be used in out turbos?
Thanks,
Steve

 

[charlief1]

Ya lost me there. Got a pic for reference Steve?

 

[1dollardog]

Ya lost me there. Got a pic for reference Steve?

No problem. Scan through this for my set up. It is new and I'm working things out as I go since this hasn't been done on a hot air before. Also, mods are in my sig. http://www.turbobuick.com/forums/hot-air-non-intercooled-tech/338744-project-mock-up.html
Steve.

 

[charlief1]

It's basically the same as the 86-87 set up then. You can use a dynamic seal without any issues.

 

[1dollardog]

It's basically the same as the 86-87 set up then. You can use a dynamic seal without any issues.

Yes, same basic concept as in the turbo(s) are blowing through a single throttle body. Thanks.

 

[Wahoo]

So is the carbon seal needed because the hot air turbo goes right to the intake manifold and since there is no pipes in between the vacuum created by the engine sucks the oil past the seal?

So if you take a intercooled turbo and clock it, pipe it to an intercooler and pipe it back to the hot air intake, would this solve that issue?

Or is it because the turbo isn't before the throttle body?

Which can be solved with an 86/87 intake and also piping an intercooler while you're in there?

 

[RUDE DOG]

It's needed when the TB is before the Turbo i beleive. here's a pic


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[bison]

The turbo can be converted to dynamic thrust eliminating the carbon seal if you can source a backplate since the compressor is not exposed to engine vacuum. If you are using an 86-89 turbo I can supply a billet backplate to convert to easily dynamic thrust.

 

[Wahoo]

The turbo can be converted to dynamic thrust eliminating the carbon seal if you can source a backplate since the compressor is not exposed to engine vacuum. If you are using an 86-89 turbo I can supply a billet backplate to convert to easily dynamic thrust.

I'm just trying to figure out a way to make it less expensive to use an other than stock turbo. I've been searching for a used hot air turbo which is few and far between currently. Gbodyparts does make hot air turbos still, they convert them still but no one has sent in a core so thats why they're not listed. They said any hot air turbo conversion is $850 and they need the core.

So since unfortunately I'm on a budget I feel maybe its cheaper to change the intake to 86/87 so the throttle body is after the turbo and then I can buy used 86/87 turbos and run them? I don't need to make it intercooled if I don't want to but it would be silly to loop the exhaust around to the front and not go through an intercooler once I have to do custom piping anyways.

But if one wanted to be a true hot air still they could, and then they can pick any turbo as long as it will fit under the hood... I'm I understanding this correctly, any conflicts with my thoughts?

Thanks

 

[bison]

There's nothing budget about high performance. When looking beyond stock it requires a lot of special parts and work. You can get a nice updated 84-85 or 86-87 stock turbo for $500 or less exchange if both wheels are usable in your core. Converting an 84-85 turbo to dynamic thrust isn't a very cost effective to produce and the market is virtually non existent since most of the 84-85 cars are suck through applications and and require carbon seals. Most that convert to blow through are looking for power and aren't going to be starting with a tiny turbo like the stock 84-85. The diffuser is tiny and won't accommodate any large compressors without choke flowing them.

 

[Wahoo]

That's what I'm saying, if I installed an 86/87 intake setup on the car, it would allow me to use turbos that don't have a carbon seal right?

Which 90% of the used turbos in the parts sections are for the intercooled cars. So as long as I picked one thats not too large to fit in the hot air location but clock it and pipe it to the throttle body on the 86/87 intake. It will work with no problems?

I mean just now in the parts section there is a turbo thats capable of 10second times listed for like $480, which seems to be cheaper than what I can try to modify my stock hot air turbo into / buy one thats already modified.

If I sent my turbo to you bison what can you do to it for $500 and how fast will the turbo be capable of running with the perfect supporting mods?

Sry for the loaded question lol

Basically comes down to if I sent my stock hot air turbo to you bison, what can you do to it for $500 in order to make the most power for my car? What will the turbo be capable of with the ideal setup, like what would it run in the 1/4?

 

[bison]

On a blow through you could use any turbo. Dynamic or carbon seal. I can't really do anything with it. You're better off starting with an 86-87 unit if you are going blow through. The compressor will support quite a bit more mass flow than the 84-85. It will also spool faster.

 

[Wahoo]

That's awesome! Ok so what I believe I learned here is, if I change to an 86/87 intake setup, which flows better already than the hot air intake. It also allows me to now use any turbo that is capable of fitting in the hot air location, only problem is clockin the turbo and running the custom piping to the throttle body.

So I think performance wise its a cheaper solution then trying to buy/find a modified hot air turbo say like a TA-49... Unless I'm lucky and a USED (aftermarket/modified for more performance) hot air turbo shows up for sale one of these days.

Because to modify my stock hot air turbo for more performance looks to be around $800.

 

[RUDE DOG]

Its still gonna be over $500 to get an ic car intake and turbocharger,not yo mention gaskets and labor. one way or another it costs to go fast.

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[Wahoo]

Yeah I know, but if I never find a used hot air turbo then I have this option which is nice to know.

I just want the best bang for the buck performance wise, I will be using E-85. I still have lots to do though, but I wanted to know about my options for turbos.