RAD951

Is it a good idea to heat wrap the turbo, downpipe, and crossover pipe with header wrap? Will the heat hurt my original unrebuilt k26 turbo?

smokey

You may get a little more power, but it's not worth it. We fabricated a heat shield for my K28-8, but it affected the oil pressure on the track. If the turbo cannot get any cooling air, the oil temperature can increase significantly. Others may have had more positive experiences, but I'd say leave well enough alone.

StanUK951

What if you just heat-wrap the exhaust manifold (I think you guys call it the header)? This might also have safety benefits - I've already had a leaky cam cover...

David Floyd

On my new engine, I have wrapped the headers, crossover pipe, downpipe and the hot side of the TO4E Garrett.

I am also installing a big Mocal oil cooler to help with oil temps.

I hope Tim calls me soon and say's "engine is ready to ship" I sure miss driving my car, blew it up in January.

If you are using the stock turbo and cooling system IMHO just leave it as is till you make some upgrades.

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kelsean

oops

David Floyd

Wow 3 Tennessee guy's on the same post, Cool

Dave951M

I wrapped my headers after having to remove the factory heatshielding to get at a couple of big cracks. The wrap I prefer is the DEI fabric wrap, Summit or Jegs carries it. One other area you should seriously consider wrapping is where the exhaust pipes are routed near the driver's side cv joint. I saw it in an Excellence article about suspension mods and it makes a lot of sense. It couldn't hurt to wrap the crossover and downpipe. I don't think I would wrap any of the turbo itself, reason is when shut off, it will retain heat and maybe cook the oil and shorten turbo life.

Dave

RAD951

Yup I thinks thats what I am going to do. Just heat wrap the down pipe and crossover pipe. I am leaving the turbo like it is. Thanks for your suggestions.
Hey David, is there any local club to do autoX, like N.A.S.A, P.C.A., or S.C.C.A. ? I used to autox in knoxville. But now I am at Columbia,Tn.

David Floyd

RAD951,

There were NASA events at the New Nashville Speedway last year, but I can't seem to find any info this year. I think the Nasville area SCCA does AutoX.

I have been to DE's at the Talledega GP track and Road Atlanta.

There is a new Skip Barber track opening in the near future in Birmingham, PCA will run DE's, I have heard this track is first class.

RAD951

Are there any upcoming events? And, do you know how soon the skip barber track will open? Birmingham is really close by, I hope it opens soon. Thanks for the info

David Floyd

Check out the SCCA website under the Tennessee region there is a list of events 2 this month.

Not sure on Skip Barber, I heard it was planned to open this summer, but some delays have pushed that back.

There was a DE at Road Atlanta this past weekend, next one in August and November, Talledega GP in September and Memphis in November.

Edman951

It think heater rap trap's moisture and rots out normal steal headers,but since are headers are s/s then it's not as bad. But IMO ceramic coating is the way to go if you want to trap heat. In my old vw golf vr6 i coated my exhaust manifolds and the surface header temp dropped 250F+ and 100F drop in radiated heat at idle at running temp.It has been determined that engine efficiency improves by 1% for every 10° degree drop in under-hood temperature.So if i lost 10% in radiated heat, in "theory" i gained 10% horsepower.
<a href="http://www.performancecoatings.com/benefitdata.htm" target="_blank">For more facts click here</a>
I plan to do my 951 header,crossover pipe, wastegate and downpipe next winter. I'm doing it more to reduce under hood temps and if it speeds up exhaust gas that a bonus.

Edman951

I'm also doing test's with my car using heat shields to reduce under hood temps, i made a heatshield for the header and i want to make one for the intake manifold to help reduce the heat soak from the turbo to the intake manifold.
Does anybody out there use heat shields to reduce under hood temp?
Here's a picture of my first one i maid over the header,since i've only had my car 6 week's now i have not changed my fuel line's for s/s line's and since so many guys have had fire's from dried up fuel line's i maid it to reduce heat going to the fuel line's.
Is this a good idea? Any suggestions?

Jax951

Edman951:

Those pics are really small, so I can hardly see them, but I think a heat shield over the exhaust manifold is a great idea. However, the problems with fuel lines are not caused by them getting hot, but by them cracking with age, leaking and dripping down onto the exhaust manifold.

After I pulled off one of my fuel lines while pulling my injectors, I found that it was cracked REALLY bad. I pulled the other 2 lines and didn't drive the car again until I had replaced all three with braided fuel lines. Don't put it off - change them as soon as you can.

MJ

David Floyd

Edman951 is right, ceramic coating is ultimately
the best way to go, some are better than others about staying on, so do some homework ( I have heard great things about Swain coatings )