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fredmeister fredmeister is offline
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Join Date: Oct 2002
Location: Baltimore, MD, USA
Posts: 2,232
turbo hiting engine sheet metal

Just finished installing the GSF headers and K27S turbo on my 79 930.
I was wondering if the other members have seen their turbo upgrades hitting the engine sheet metal where it runs over the top of the exhaust housing. I put a layer of heat wrap/header wrap to act as an insulator between the hot turbine side of the turbo and the sheet metal, but I still don;t like the fact that there is no air gap between the parts.
I am worried that this will put too much heat into the metal shielding and eventually transfer all this hit back into the engine. I already started to notice the rubber engine seal starting to bubble.
I cannot rememebr if the original OEM turbo 3LDZ had an air gap between the sheet metal or not before I removed everything.

Anyone run into this issue?
Any suggestions on fixing it, as I do not prefer to start hammering clearance bulges into the engine sheet metal as it is nice, new, and fits perfect to the engine as is.
I took some measurements of the engine tin with a surface pyrometer at idle in this area and saw temps around 370-400 degrees and wonder if this will damage the distributor and other items that are so close in this area of the engine.

1979 930 Turbo....3.4L, 7.5to1 comp, SC cams, B&B intercooler, Snow Perf water/meth injection, Rarlyl8 headers, Garret GTX turbo, 36mm ported intakes, Innovate Auxbox/LM-1, custom Manually Adjustable wastegate housing (0.8-1.1bar),--running 0.7bar max
---"When you're racing it's life! Anything else either before or after, is just waiting"
Old 10-08-2007, 12:35 PM
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