This also happened to me once on the street but I never found the problem, I thought it was something under the dash.
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Can I assume these cable melting events happen primarily near the exhaust parts, or are they more randomly distributed? Looks like I get to add more thermo sleeve to my shopping list, bonus for more under-hood bling.
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On my friend's car, the cable did not melt, but it did bind up pretty well. We dissected the failed cable and determined that the outer housing had warped enough to bind the inner cable in the region closest to the turbo housing/exhaust manifold. Insulating the throttle cable from heat coming off those units would be a good start on a solution.
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Interesting post on the MotoIQ blog about Sierra Sierra having turbo stud failures.
http://www.motoiq.com/magazine_artic...fr-turbos.aspx |
Originally Posted by emilio700
(Post 642364)
Interesting post on the MotoIQ blog about Sierra Sierra having turbo stud failures.
http://www.motoiq.com/magazine_artic...fr-turbos.aspx |
Those T04 housings are made of pot metal. It's no wonder they're pitching turbine wheels.
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Its too bad that Sierra Sierra is a budget team and can't afford V-bands.
edit: I'm getting a real kick out of $sierra $ierra dealing problems that peasants on this board solved a long time ago. We really are great. The 3rd paragraph reads like my life with the old set-up. Look at this safety wire job http://photos.motoiq.com/MotoIQ/Colu...20_8xoh3-M.jpg Notice which side of the top bolt the wire lies. |
Originally Posted by bbundy
(Post 640315)
That is what I thought too. But I could run down a long hill in high rpm vaccume for a long time and not see any oil smoke. Floor it from a steady cruise on flat ground and leave a smoke screen after it came up to full boost.
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Originally Posted by JasonC SBB
(Post 642546)
Whoa. Is this with an FM stroked/bored/honed and assembled block?
Bob |
Originally Posted by hustler
(Post 642446)
Its too bad that Sierra Sierra is a budget team and can't afford V-bands.
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Originally Posted by bbundy
(Post 642550)
Yep. And Vent to atmosphere on the valve cover and oil pan doesn’t change it I don’t get excessive blow by in the vent system anyway. Motor still shows good compression. Install stock internaled motor keep everything else the same including boost level and problem goes away. Just had to back the fuel down a bit it and it makes slightly less power and torque.
Bob |
Originally Posted by Trackwhore
(Post 642552)
That's because the'd rather run a twin-scroll exhaust housing and manifold.
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Originally Posted by JKav
(Post 642567)
In my mind, the only thing that explains this is ring flutter. Have you or FM checked with the piston manufacturer on what you're experiencing?
Bob |
Originally Posted by hustler
(Post 642611)
...and look how well that's working out for them.
Twin-scroll has obvious benefits in this application. |
Originally Posted by Trackwhore
(Post 642744)
...and look how well it worked out for you. It got you to a better solution. I'm surprised you are making comments about the evolutionary process of building a reliable race car. ;)
Twin-scroll has obvious benefits in this application. |
Originally Posted by curly
(Post 639205)
I would be flabbergasted if more than 4 cars on this site could survive 7 track days in 14 days…
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The link from the Sierra Sierra blog deserves to go in here:
http://www.cogneusa.com/img/prodotti/steel6a_eng.gif http://www.cogneusa.com/img/prodotti/steel6a_eng.gif |
Originally Posted by sjmarcy
(Post 642763)
Pretty common sentiment. Bring spares, tools, cash, and friends if you boost a lot.
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Originally Posted by bbundy
(Post 642621)
The new pistons I got are compleatly different design and also have longer skirts. We will see. I got two more weekends then things start coming apart again.
Bob |
Originally Posted by JasonC SBB
(Post 643154)
With whose pistons did you rebuild it? Does it do away with the gas port thingy that may have contributed to your problem?
edit: I'll add that they are not compatable with the stock oil squirters. Bob |
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