Is everyone familiar with this picture?

[Rustam]

http://mysite.verizon.net/vzerdcib/sitebuildercontent/sitebuilderpictures/alpina_glow.jpg

[Paul in NZ]

Yes,I have seen it before.

[Nick.Hay]

B10 engine??

[Alexlind123]

First time for me.

[Gayle]

http://mysite.verizon.net/vzerdcib/sitebuildercontent/sitebuilderpictures/alpina_glow.jpg

The clueless need explanation. Why does it look like its glowing? Is the fact that it appears to be glowing related to it being alpina? Sorry to be so stupid, but I need someone to tell me the point of what I am looking at.

[Anthony (M5 in Calgary)]

The clueless need explanation. Why does it look like its glowing? Is the fact that it appears to be glowing related to it being alpina? Sorry to be so stupid, but I need someone to tell me the point of what I am looking at.


Alpina B10 Bi-turbo engine on a test stand running its heart out. Heat from the work raises the temperature of the entire exhaust and turbo housings to glow red. Talk about a stress test...

[Jay 535i]

It's glowing because it's turbocharged ... very. Compressing all that air creates a lot of heat.

I haven't seen this pic, but I've seen similar ones from Saab's early turbo development thirty years ago.

[Paul in NZ]

if you ran any engine at full throttle for a time the exhaust headers/manifold would be red hot,the exhast gas temps are like 600c

[Anthony (M5 in Calgary)]

if you ran any engine at full throttle for a time the exhaust headers/manifold would be red hot,the exhast gas temps are like 600c


Indeed, see link for S38 headers aglow:

http://www.bmwe34m5.com/registry/E34registry.html

[genphreak]

Alpina B10 Bi-turbo engine on a test stand running its heart out. Heat from the work raises the temperature of the entire exhaust and turbo housings to glow red. Talk about a stress test...It sounds like Whit has plans for something like that atm. With 6500rpm one can get 500hp. As the BMW racing team did back in the 80s, by heading for 7500rpm or they claimed 950hp with those old KKK27 turbos and Kugelfishcer injection.

Rice or no rice, the e34 would need some serious wings- and would see upwards of 300km/h... :D now that would be unbelievable... and worth putting up against a modern M5 ;)

[Nick.Hay]

If that was IN the car... Imagine how hard you would have be fanging to get that sort of temperature

[Jon K]

just to clarify - the manifold is not necessarily glowing... those turbos only put out about 7 or 10 psi... nothing crazy - they are more than likely using a thermal camera that highlights the heat.

[winfred]

uhhhh...you've never seen a glowing manifold! don't you have a turbo? **** my 89 760 volvo turbo would glow just from the interstate at the bottle neck before going into the turbo, after a good flog the whole turbine housing would glow, seen a late model amg benz motor on a dyno glowing the pipes back a good 10 feet


just to clarify - the manifold is not necessarily glowing... those turbos only put out about 7 or 10 psi... nothing crazy - they are more than likely using a thermal camera that highlights the heat.

[winfred]

1000-1375 degrees is the range from blood to cherry red, not a big deal on a gas motor

[Jon K]

winfred - i wasnt sure if they were actually glowing or if they used a thermal imaging camera.

[Bill R.]

to really retard the timing to prevent detonation, then its lighting on the way out... Thats how exhaust valves go bye bye



winfred - i wasnt sure if they were actually glowing or if they used a thermal imaging camera.

[Gayle]

winfred - i wasnt sure if they were actually glowing or if they used a thermal imaging camera.


I wondered that too and that was one of the reasons I requested an explanation of what I was seeing.

[Rustam]

I was reminded by the subject of high temperature and glowing exhaust - McLaren F1 uses gold to shield the heat from that bmw v12:

http://upload.wikimedia.org/wikipedia/commons/thumb/5/5d/1996_McLaren_F1_engine.jpg/800px-1996_McLaren_F1_engine.jpg

[BigKriss]

maybe there is no air flow to cool down the mainfold and exhaust.


If that was IN the car... Imagine how hard you would have be fanging to get that sort of temperature

[Rustam]

maybe there is no air flow to cool down the mainfold and exhaust.

its very likely that the engine is run at max rpm - they do that deliberately to break parts, so that they can be taken outand analyzed to design better ones...