i have a component that has a duplex 2205 pin sliding axially in a pair of bushes. it is unlubricated out in the field and runs a fair bit of clearance to keep build up from happening. what is a good bushing material to stop galling and corrosion and help it run freely without lubricant?
what is the function of the oil pump internal relief valve when there is a separate relief valve (circled)after the pump connected to the main gallery? is it just added redundancy?
TIA
What limits the minimum piston to head clearance you can run on an typical gasoline engine. lets limit to iron block, steel rod, alloy piston, alloy head.
my understanding is the following (in no particular order)
- clearances between main bearing/BE bearing and pin (~ 0.1 mm combined)
- piston...
Hi can anyone help me find some S-N curves for cast aluminium alloys.
Something with good strength and fatigue performance, i don't have specific alloy in mind.
i have the Fatigue Data Book - light structural alloys but there isn't much data on castings
i have an inline 6 vibration damper from bmw engine s52. stamped on it is 390-430hz. what order and rpm would this be tuned to? 3rd would mean 7800-8600rpm by my calculations but the engine never sees that rpm. so would it be the 6th and thus 3900-4300rpm?
What are peoples thoughts on suitable piston ring materials for high performance NA engines that live mainly on the street but still get driven "properly" from time to time?
There seems to be a push for thinner steel top rings with various face coating/treatments (e.g nitriding ) are they...
Hi i'm adding a different gasket design using sheet nitrile 3.2 mm thick 60 shore harness. How much compression would be a good ballpark to use to seal up a valve cover? i'm thinking of using a 2.5 mm spacer to limit compression to 0.7 mm to avoid over deforming it as its not as rigid as some...
what sort of hardness should i be targeting for an automotive idler shaft? its the idler for the timing belt. i'm interested in the hardness of the face for the oil lip seal and journal for the bearings? the material is EN26 with harness 32HRC is this ok for the seal face and for a typical...
is there any real tangible benefit from increasing fuel rail pressure from say 3b to 4b in a naturally aspirated engine with injector close to head spraying on the back of the valve?
People say there is better atomisation but has anyone seen real gains in fuel economy, better BSFC, more...
what are some very commonly stocked carbon structural hot rolled sheet/strip steel in sizes less than 3/16" thickness. grade can be 30,36 50 or anywhere in between but not above or below.
must be readily available as we are having problems find stuff like 11,12 and 14 gauge, 1/8" etc in these...
does reducing the reciprocating mass lower the inertia of the crankshaft system (i.e. crankshaft, flywheel, pulleys, piston, rods, pins etc etc)? or does the fact the piston both accelerates and decelerates negate this over a single full rotation?
the rod obviously does more than complicated...
i want to get a small shaft for a piece of equipment shot peened for better fatigue resistance. is it beneficial to grind to a very fine almost polished surface finish before shot peening? o
I'm planning on making a engine induction system airbox from glass weave and want to know what resin to use for it for it to be able to withstand the heat from under the bonnet. it is on the cold side of the engine so is away from the exhaust. i do plan on painting the outside with heat...
Hi, does anyone know what the typical uniaxial mechanical properties of these Metric grade bolts are.
I am aware of the proof/yield stress and UTS but NOT the elongation values which is what i am really after?
i want to know how much strain do the bolts undergoe before actual fracture? For...
Are there any rules of thumb simple calculations for ballparking the secondary/collector size for 6-2 header?
For example if the primaries are 1.5" and 3 the primary pipes merge into a single pipe what should the secondary size typically be?
I have an inline 6 engine currently with a single plane intake manifold where the 6 runners are fed from a common plenum.
I have heard that dual plane manifolds make more lowend power and single plane manifolds make more topend. Why is this?
I have heard that a 6 cylinder with two plenums is...
