Engine braking..

[Dan 4RR]

Hi. Which engine design would give better engine braking ability over others. For example would an inline four have better engine braking abilities over a V twin. Are 2 strokes better than 4 strokes at engine braking, etc and why???
Cheers.
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[Sephiroth]

4 stroke V twin although I think a single is better?

[iooi]

[cokker]

2 Strokes don't really engine brake, the engine just gets faster the more you change down lol.

Id say big single and V-twins are the best, something to do with compression i think
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[stinkwheel]

You shouldn't really engine brake for any length of time on most 2-strokes. Closed throttle = insufficient oil. The throttle controls the oil pump so when it's closed you're giving it oil for tickover but the engine's doing 6k revs. If you must (like on a steep hill) then it's best to blip the throttle occasionally.

Big singles have a huge amount of engine braking, you can lock up the rear if you downshift too quickly but it's more down to compression. A high compression, low revving engine will tend to have more engine braking effect than a lower compression, high revving engine.

Also the bigger the engine, the more effect. Try snapping the throttle shut on a 1340cc Harley and see how far you get.
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[magpiemale]

have done that on a z750 and it has a harsh one if slow rideing good when comming to a slow on the motorway

[Method]

IL4 4t's have next to none.
2 Strokes have none.
4t Parallel twins have some, barely noticeable.
4t V-Twins have quite a bit, very noticeable.
4t Singles have collosal amounts.
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[SoulRider]

Have to admit my engine braking on my sv650s means i hardly have to ever use the brakes unless needed to stop fast. i usually just tap the brake to make the light come on.

V-Twins FTW
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[Deckx]

[bish777]

[Kickstart]

[Marci]

Throttle cable meters the aperture effectively whilst revs control impeller speed and thus flow rate? That right? ie - all the throttle does is reduce the restriction on the flow the more you open it but faster the engine's going faster the flowrate no matter what the restriction... which should also produce the necessary variances in delivery - as the restriction opens head pressure decreases but flowrate increases... that sound about right Keith? (just guessing)
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[Jack_Cheese]

[Kickstart]

[dabigginger]

[Kickstart]

Hi

Not sure it alone is going to have any great effect on the total engine braking. Some effect from how heavy the lumps of metal are it is slinging round inside in total. More effect on how it feels / how long it takes feeling to return to your fingers when you have slowed down.

Get rid of the compression and you could turn the crank by hand.

All the best

Keith
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[MarJay]

[bish777]

Dump the FI for a big flatslide carb, that'd be more fun.
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[Jack_Cheese]

[lumphammer]