Questions tagged [engine-theory]

Use this tag when asking questions about the theory of engines. Do NOT use for practical problems, only theoretical questions

16 questions with no upvoted or accepted answers
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7
votes
2answers
209 views

How much oversize should you target when choosing a throttlebody?

This is in addition to my previous question about throttle bodies. I know it may sound a bit subjective, but I think it has a clear technical aspect, and I have done a considerable amount of homework. ...
4
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0answers
78 views

Is there any advantages of the mounting side (left or right) of the motor in a FWD vehicle?

Almost every FWD I have dealt with has the engine on the left side and the transmission on the right. Hondas with the D17 Engine has it the opposite which made me curious. Does the mounting side of ...
3
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0answers
86 views

Would a camless engine need a starter motor?

In theory, if you had a working camless engine with fully variable valves... Would it be possible to just have the engine start itself by choosing the most appropriately placed cylinder at the time ...
2
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0answers
25 views

Does an oxygen sensor's lambda value represent the same when running on LPG?

I have converted my car to LPG, and i've been tuning it today with a wideband lambda controller. It runs pretty okay, but i'm not yet satisfied. The weird thing is, it accelerated best when the ...
2
votes
0answers
29 views

How to analyse engine oil analysis results?

I got an engine oil analysis done on my 1991 CAT 3116 with 124,000k miles on it. I received a sheet of what I presume to be the result of some kind of spectrometry. As I'm not an analytical chemist, I ...
2
votes
0answers
97 views

What would happen if you tried to start an engine with the cam gears meshed

What would happen in the case that someone tried to start an engine like this: My guess would be, if the starter has enough torque to overcome the strength of the cam gear teeth, it'd wreck the cam ...
1
vote
2answers
288 views

Differences between drive by wire and drive by cable

What are the main differences, advantages, and disadvantages of using a drive-by-wire versus drive-by-cable system?
1
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0answers
24 views

Optimizing temperature and spark for horsepower

I recently completed a heads+cam project on my car to increase horsepower. I ended up falling about 50hp short of my goal, and am looking for every little knob I can turn to eek out that last little ...
1
vote
0answers
62 views

Pencil Coil Operation

Pencil coils are very small. Do they operate on the CDI Principle? I thought that CDI was not good on lean mixtures which are good for fuel economy? Do they operate on the accepted Inductive Discharge ...
0
votes
0answers
5 views

H100 Hyndai - engine proble

have a problem with my H100 hyndai 2009 model, strange noise from the engine, no power and a little clear smoke from the exhaus - and the engine is shaking. please help.
0
votes
0answers
53 views

Cleaning ground rotor magnets dust and particles after rotor assembly damage

I happen to have an FZ8 motorcycle which is famous in warmer climates like Greece for a very serious failure (along with FZ1 and R1) in the rotor assembly. In many cases the glue holding the magnets ...
0
votes
1answer
73 views

Car struggles to pull off up hill

Could anyone help with another issue/potential issue I have? When I am parked on a hill, facing upwards, I put my car into first gear and when I pull off it feels as if I am towing something heavy, ...
0
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2answers
267 views

2014 Jeep SRT 6.4L oil filter was too small - what kind of damage?

What possible damage could my engine incur from having an oil filter installed that is smaller than the suggested size? I have damage but I’m interested to hear what this forum has to say about it ...
0
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0answers
55 views

Does an engine with lower viscosity oil require less warming up?

I have always seen that an engine should be driven gently (low throttle, low revs) for about 15 minutes after starting, in order to bring the oil up to temperature and lubricate the engine properly. ...
0
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0answers
48 views

Which vehicle came with the most different engine cylinder configurations?

A question that cropped up in a discussion today... Most vehicles sold come with one or two different engine cyinder configurations, for example and inline-4 and a V8. Quite a few have three, and a ...
-2
votes
2answers
96 views

Could a wind turbine work for a car?

Could I attach a little fan to power a motorcycle alternator to be more efficient then running off the engine? Attach any where facing the wind on the vehicle to increase mileage from eliminating ...