Engine Porn

[LateFan]

^^ yes!

[varg]

Old school cool

Flathead with a Graham supercharger


Miller 91, which I may have posted before.

[LateFan]

Millers are crazy cool.

On that Flathead, what is the rubber line in the center of the pic going into the cyl head? Is there a water jacket around the intake?

And what is driving the supercharger?

[varg]

Millers are crazy cool.

On that Flathead, what is the rubber line in the center of the pic going into the cyl head? Is there a water jacket around the intake?

And what is driving the supercharger?

Charge cooling, it must have been a very inefficient compressor for coolant temperature to be lower than charge temperature at such low boost levels (the hoses on the heads are coolant outlet, not inlet!). It's belt driven through a 90 degree gearbox. I just realized that that picture was mislabled and it's a McCulloch, not a Graham supercharger. Here's a good picture of one:



And if you have a look at the compressor wheel you'll see why it was so inefficient. Very primitive, as you'd expect from a pre-war supercharger. https://bangshift.com/bangshift1320/...-supercharger/

[LateFan]

Matra V12

https://www.youtube.com/watch?time_continue=1&v=lxVUrb8NyWQ

These old F1 cars ...look at that thing - he has a bit of plastic or aluminum around his upper body, but he's just sitting in a shallow tub with no protection. The roll hoop doesn't even reach to the top of his helmet.

https://www.youtube.com/watch?v=xZwlI6U3pLg

https://www.youtube.com/watch?v=x9-e3EeCCww

[KrautnotRice]

Incredible. You really didn't wanna crash in those.
Brass balls.

[TobyB]

These old F1 cars ...look at that thing

The CanAm F5000's were at the vintage races a few years back, here-
4 huge tires, a bit of conduit, and a 5 liter v8 in behind you.

It scared me just watching the engine twist the 'frame' at idle.

t

[lukeADE335i]

OLD F1 CARS - Incredible. You really didn't wanna crash in those.
Brass balls.

Indeed - the bare V12 sounds amazing. Max Vestappen probably wouldn't be alive by now if he were racing in that era with the season he's having thus far!

[Preyupy]

The coolant running through the supercharger housing was not for "cooling" it was to keep the supercharger from icing up. In a draw through application where there is fuel in the supercharger the temperature drop is so high that it will actually freeze up (even worse in cold, damp weather). If the fuel condenses inside the supercharger it will puddle and if there is a back fire it will blow the supercharger off the engine. Early European SC cars had blow off valves in the intake track just for this reason, it was not for limiting boost it was to keep from blowing the thing UP.

[LateFan]

^^ That's crazy talk!....and really interesting - thanks!

[LateFan]

On the Matra F1, can someone explain the three sets of 2-into-1 headers on each side? Is that a scavenging thing? Similar idea to a 180º header on a V8?

[LateFan]

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[LateFan]

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