TacoBill

Wrapping looks good Tom!

Almost too nice to to put under the car!

89Trooper

Thanks! It turned out better than I expected.

I bet J.R. and the rest at Granatelli can wrap them quick - what you see there took me 3 hours.

turbo05gt

You can tell you took your time well worth it

jayguy

I've seen wire (safetywire I think) used on wrap before, it's smaller and hides better, but I don't think there's any problem with hose clamps either. And like you said, they'll be coated and won't be that noticable anyway.

Great job, nice looking cat , and I can't wait to see the finished product.

turbo05gt

He could always paint them black too

89Trooper

Thanks guys!

The silicone coating is black, so it will all blend together.

I'm going to spray some spare pieces of wrap tonight to see how the coating looks. I'm thinking about NOT coating them now since they look so good, but I probably will.

Granatelli

YES - The wrap traps heat in the pipe and drops underhood temps - period. Moister is a non issue

Granatelli

You can also use saftey wire. A thin piano string type cable they is hardly visable

89Trooper

Here's a test piece that I coated. I think it looks really good, so I'm going to coat the rest of the exhaust pipes the same way.

Attachment 35289 The hose clamps are well hidden... do you approve, Phil?

I can still loosen and rotate the hose clamps if needed to hide the screw part.

I also installed the blow-off valve on the intake tube that runs between the turbo and the intercooler:

Attachment 35290 An O-ring is installed, and then the valve is held in place with a C-clamp.

The vacuum line runs up and tees into the fuel pressure regulator's vacuum line. I will also tee the boost/vacuum gauge off this line to get an accurate reading to the gauge.

I'm still not 100% sure what the difference is between the blow-off valve and the wastegate.

I know the blow-off valve is vacuum controlled and the wastegate is controlled by the exhaust - but I really don't know their exact functions.

turbo05gt

The waste gate controls your boost level by "venting" once you reach your spring level and your BOV expels excess boost once you let off the throttle so you avoid compressor surge.

89Trooper

So the BOV opens at full vacuum (off the gas) to expel excess boost coming back from the throttle body, and closes as vacuum decreases (on the gas more and more) to send all the boost to the throttle body?

And the waste gate has a spring set to open when a pre-determined psi is reached?

turbo05gt

Yep, and the BOV is either open or closed

turbo05gt

you're going to love the BOV sound and find yourself going into boost all the time just to hear it!!

89Trooper

That makes sense... it's like a switch (and not variable).

That's another thing I wondered about - what makes the "turbo" sound. So it's the BOV and not the wastegate?

I always thought it was the wastegate!

kh765

Yup, definitely the BOV. Learned all about turbos with my love for Supras.

Granatelli

The spring in the waistgate fight the exhuast pressure. The exhuast back pressure reaches the limit of the spring in the waistegate it pushes open. What this does is relieve the amount of Exhuast pressure that can spin the exhaust turbine. The exh turbine is connected to the air inlet side of the turbo (also called the cold side) the the exhaust spins the exh turbine blade, on the same shaft as the air intake turbine blade it sucks air into the turbo and compresses it into the engine. The waistegate is the balance between intake pressure and exh pressure.

The BOV - or blow off valve is exactly what has been stated. I pressure relief to expell excess air pressure build up when the t-body slams shut and the turbo has no place to push the sir it was just producing. You will find our kit does not make a ton of turbo noise as we size the BOV to move a ton of air on decell.

turbo05gt

What wastegate and BOV do you use in your kit?

89Trooper

I hope it makes at least some noise!

89Trooper

wastegate = Tial

blow off valve = HKS

turbo05gt

nice, quality stuff