Search Results
| Search type | Search syntax |
|---|---|
| Tags | [tag] |
| Exact | "words here" |
| Author |
user:1234 user:me (yours) |
| Score |
score:3 (3+) score:0 (none) |
| Answers |
answers:3 (3+) answers:0 (none) isaccepted:yes hasaccepted:no inquestion:1234 |
| Views | views:250 |
| Code | code:"if (foo != bar)" |
| Sections |
title:apples body:"apples oranges" |
| URL | url:"*.example.com" |
| Saves | in:saves |
| Status |
closed:yes duplicate:no migrated:no wiki:no |
| Types |
is:question is:answer |
| Exclude |
-[tag] -apples |
| For more details on advanced search visit our help page | |
Results tagged with engine-theory
Search options not deleted
user 22919
Use this tag when asking questions about the theory of engines. Do NOT use for practical problems, only theoretical questions
4
votes
How can a car be tuned for low/mid/high end torque?
The only thing you can tune while keeping an engine mechanically 'identical' as you word it, is playing with ignition timing and AFR. If you have variable valve timing and you know what you're doing, …
- 2,954
4
votes
How is Intake Manifold flow measured?
With modern engines, it is measured with a MAF meter, a device that meaures air flow by using a hot platina wire or film that cools down when air flows past it. The temperature is an indication of the …
- 2,954
10
votes
What is crankshaft grinding and why is it done?
A crankshaft wears with use. After a lot of miles, the play between shaft and bearing becomes too much. The more play, the lower the oil pressure, the worse the lubrication. And then it wears out even …
- 2,954
6
votes
2
answers
3k
views
Can a permanently stoich or lean running engine ruin a catalytic converter?
It's known a cat can be burned by an engine running too rich for too long, but i wonder what the effects are of constantly running lean. Will the cat just be uneffective because of the lack of CO, or …
- 2,954
5
votes
4
answers
600
views
Why isn't injection managed to use the entire intake stroke?
As far as i know, electronic fuel injectors only know two discrete states, on or off. Under light load (ie. low rpm and throttle) the injector doesn't have to deliver much fuel. So naturally the injec …
- 2,954
1
vote
Relationship between torque, power, specific fuel consumption, and AFR
The graph tells you how it is, i'll tell you why it is so.
The reason why a leaner AFR (than stoich) is more efficient, is that it burns hotter.(but slower) It is so in every combustion. Compare it …
- 2,954
7
votes
2
answers
787
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. …
- 2,954
2
votes
1
answer
1k
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 lambd …
- 2,954