View Full Version : Engine Quiz

06-25-2017, 07:59 AM

I got 32 out of 35


06-25-2017, 01:04 PM
34 out of 35

06-25-2017, 01:13 PM
33 out of 35 here. I missed on firing order of a four cylinder engine and the purpose of cyliner honing.

t walgamuth
06-25-2017, 01:30 PM
I missed their answer on poppet valves vs sliding valves....wtf knows of an engine with sliding valves? And since when would they be cheaper? Sleeve valves, right?

06-25-2017, 02:43 PM
33 out of 35 here. I missed on firing order of a four cylinder engine and the purpose of cyliner honing.

hey those are the only two I messed up on too!...there are many answers that are debatable. for example, how can a torque wrench measure the pressure on a bolt when bolts typically work under tension...and don't Wankels typically lack pistons AND valves, and changing the length of and exhaust pipe can 'tune' and exhaust system just as much as a header....and, and, and. just saying is all. cheers, junior

06-25-2017, 10:18 PM
Greg, there were a couple (such as those you mention) that I approached as though I were taking a test at the DMV...the least incorrect was my choice. Torque was the correct choice only because in theory, there is an abstractly direct relationship if there weren't any friction to deal with.

I mis-interpreted the cross hatching since I really visualized lubrication as flow of oil through passages and rotating bearings, overlooking the idea that a cylinder wall is a bearing surface as well...and if you don't lubrcrate it adequately, well, we all know that result.

I have only had one 4 cylinder engine that spent much time working on and even that one's order I had bollixed up in my mind...wouldn't have mattered as it was still not the most common.

t walgamuth
06-26-2017, 06:35 AM
There is more than one firing order for a four cylinder engine.

Blue 15G
06-26-2017, 10:18 AM
30 out of 35.

06-26-2017, 11:35 AM
32 out of 35.
Gus Wilson's test is much more interesting (at least, to me):http://gus-stories.org/images/FinalFinal.pdf

07-11-2017, 09:08 AM
Messed up on diesels, honing, and something else I forget. 31/35

07-25-2017, 12:11 PM
I quit half way through. That thing is so slow, that if you happen to have the cursor at the wrong place (say, from a previous answer) and it decides to wake up, it'll give you the wrong answer. The only questionj I actually missed was the 4 cylinder firing order. I'd be surprised if anyone other than serious "Banger" owners would know (or care about) that.