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930 bumper issues

I recently have my car re-sprayed back to factory Silver. I also had Yellow Bird turbo bumpers added. I am not sure if I should add the Porsche Bumper to Body gasket:

As you can see below the gasket is not installed yet, how does it look? Should I add the gasket?





Secondly, I am running a FabSpeed Super Cup exhaust with 200 cell cat. The issue is the muffler comes super close to the bumper on the drivers side almost at the exit point. The body shop told me that there is a chance the muffler could melt the bumper.

Will lava wrap have protect the bumper from melting?

Your suggestions, comments and experiences are greatly appreciated!




Old 02-06-2014, 12:21 PM
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Isn't that rear bumper fiberglass?
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Old 02-06-2014, 01:26 PM
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Yes it is FG ... The bumpers are Getty Design sourced through TRE Motorsports

Last edited by speed964; 02-06-2014 at 01:34 PM..
Old 02-06-2014, 01:27 PM
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Fiberglass should not melt. Fiberglass cloth has a melting point is 1121˚C. Nice rear bumper, I will have to look in to one of those.
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Old 02-06-2014, 01:38 PM
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... but the paint don't like too much heat. So protection is recommended here

BTW, I like the bumper without the rubber gasket
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Old 02-06-2014, 01:48 PM
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The fiberglass cloth itself may have a high melting point but the polyester or epoxy resin that the glass is wet out with during a layup holding it all together does not.
Old 02-06-2014, 02:18 PM
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As others have said, you need to protect the rear bumper from heat or it will be quickly damaged.

I would definitely add the rubber gasket to the front if it were mine.
Old 02-06-2014, 02:28 PM
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LOVE the silver. My all-time favorite.

My vote is add the rubber strips. We just installed a NOS genuine Ruf Yellow Bird bumper on a 930, think it looks better with the black strips between fenders and bumper.

The heat won't melt the fiberglass, but very likely will warp it. Suggestions:

1. Bend a reinforcement bar to match the curvature of the rear valence, below the slits. Stainless is great, but even a piece of all-thread will work. Epoxy it in place. now this area won't warp, will hold his shape for years despite the heat.




2. Get a metal heat shield for the turbine housing. If you have a Garrett GT35R turbo, TurboKraft manufactures a stainless heat shield.
If you have a K27 or similar, get a rigid multi-layer metal heat shield, like in the photo below.
The flexible "turbo blankets" do not hold up, period. Tried all of them, all materials. Fail.



3. If heat is still an issue, ceramic coat it all with a true thermal barrier coating rated to 2,000F.




Fabricating crash bars for your 930 isn't a bad idea either, IMO.
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Old 02-06-2014, 02:36 PM
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So I am going with the Bumper to body gaskets ... I, too, agree that it makes the car look more finished. although the early to mid 70's RSR i don't believe had gaskets,but for some reason those cars looked ok without them.

I am looking for a turbo blanket for my K27... Chris do you sell those? or is it an ebay thing?
thx
Old 02-06-2014, 04:17 PM
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Chris mentioned in his post that he has tried all of the turbo blankets out there and none of them last.
Old 02-06-2014, 04:24 PM
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So ceramic coating is really the only solution than ,right? Since turbo blankets all seem to fail the test.
Old 02-08-2014, 05:01 PM
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Might ad the factory bumper heat shield.
Chris, that engine shot is pure porn, what exhaust is that one?
Old 02-08-2014, 06:52 PM
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Quote:
Originally Posted by speed964 View Post
So ceramic coating is really the only solution than ,right? Since turbo blankets all seem to fail the test.
- You could buy or make a solid-type heat shield for the turbine housing (like Chris mentioned and pictured above).
- You could apply stick-on heat shielding material to the inside of the bumper. There are many varieties of this out there - most are aluminum but there is an expensive gold variant that is supposed to be the best.
Old 02-08-2014, 07:00 PM
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"2. Get a metal heat shield for the turbine housing. If you have a Garrett GT35R turbo, TurboKraft manufactures a stainless heat shield. "

Chris, would you send me some info on the shield. e-mail is best. thanks
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Old 02-09-2014, 07:23 AM
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Turbocharger heat shield and insulation

Here's a photo of the stainless heat shield we're manufacturing for the Garrett GT30R & GT35R (mid-frame size) ball bearing turbochargers:





TurboKraft does not stock the foil heat shields, we order them in as needed:



Optimal: formed inconel heat shields. Usually $500-600 expensive.




These look great at first, but they unfortunately just don't hold up on an air-cooled 911 Turbo. We fitted this one a basic 3.4L Turbo, and when the car came in for an oil change it was shedding, leaving a little spot of fibrous insulation on the floor.

[
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Old 02-10-2014, 12:00 PM
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Quote:
Originally Posted by Tt surgeon View Post
Might ad the factory bumper heat shield.
Chris, that engine shot is pure porn, what exhaust is that one?
Thanks!

Headers = B&B, plain off-the-shelf 930 headers. They're the ones we use & sell the most, still the winner on the dyno in most cases.

Muffler = TurboKraft 3" Sport RSE (Right Side Exit) = $1050.
Optional add-ons: 2,200F ceramic coating, dual wall rolled-edge oval tips.
Like a C2T/3.6T, the wastegate exits on the left, muffler on the right -- the most free-flowing configuration possible.
Quiet enough to easily carry on a conversation inside the car without shouting to be beard, loud enough to sound like a sports car, absolutely no droning or resonance, and unmatched performance.
This little stroker 3.4L does well over 500whp on 91-octane gasoline. :-)


The bumper above it is by one of our fabricator friends who specializes in tube work, i.e. cages, harness bars, bumpers, light bars, etc. (His roll cage work is incredible!) We ceramic coated it at the same time, too.
This bar is perfect for 911s with fiberglass bumpers, providing some crash protection, plus plenty of heat shielding. As soon as we get another car in with 'glass bumpers, and can verify this clears everything nicely, we'll offer them for sale.
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Old 02-10-2014, 12:17 PM
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Quote:
Originally Posted by Ronnie's.930 View Post
- there is an expensive gold variant that is supposed to be the best.
It's been on for awhile. so far so good.
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Old 02-10-2014, 12:23 PM
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The good gold foil works really well. There's a reason it's used extensively on McLarens.
Plenty of online vendors, and you find out pretty quickly there's two price levels: cheap, and good.
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Old 02-10-2014, 02:22 PM
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