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Questions tagged [performance]

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0
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1answer
21 views

Issues after installing performance headers in civic ek

I own civic ek sedan with D16Y4 engine with auto transmission. I have installed performance headers 4-2-1 after installation I faced an issue during low rpm (during heavy traffic), engine started to ...
1
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0answers
31 views

Poor performance

I have a 2005 chevy avalanche 5.3L 4wheel drive. The vehicle starts and runs good and you wouldn't think anything was wrong with it while driving. That is until you step on it. If I were to spin my ...
0
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2answers
55 views

Is there a difference between unleaded and premium unleaded fuel?

As far as I'm aware the octane rating is the important thing so in th uk, using super unleaded(97) or v power(99 i beleive) gives the superior performance. I have seen 'unleaded' which says its 95 ...
2
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1answer
60 views

Does having no oil/thinner oil make an engine feel more revvy/lively?

I saw a comment which said if you run with no oil this would make a car sound and feel more revy and lively etc(though it wouldn't last very long). Is this true? Personally when I've been low on oil ...
1
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0answers
34 views

High Idle in Tata Manza, occasionaly

I have noticed that the diesel car idles high (1400-1600 RMP) in Idle. This is occasional and some times the engine check light comes on and goes off. scanned the system, but was not able to find ...
1
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2answers
66 views

Honda Dio performance reduced after 9000km

I see a drastic performance reduction on my 2017 Honda Dio gearless scooter which has just completed 9000km. I just went back to the service center and the guy there, after riding my scooter said the ...
2
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2answers
704 views

Performance Modifications for the EJ253 - Throttle Body Spacer?

I've got a 2007 Subaru Forester school-bus, with a EJ253 N/A mated to a 4EAT A/T. So I've done some mild Googling, and came across This Great Post. Deep in there is this gem: THROTTLE BODY ...
2
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0answers
65 views

2011 Chevy Impala was inactive with dead battery for 3 months! I have tons of problems now! Help!

In late December 2017, I discovered my 2011 Impala wouldn’t start. My boyfriend and I jumped it with our other vehicle and it worked. We disconnected the cables and left it running for a while. We ...
1
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1answer
230 views

High or low octane and mileage? [duplicate]

I understand that you want to use the octane that your car calls for. Higher octane cost more at the pump. Ethanol aside, are there instances in climate or the terrain where a shift in octane level ...
1
vote
1answer
216 views

Sienna lurching, loss of power

OK drove my previously functioning 2000 Sienna, it was driving fine/like normal for a minute, then it started "lurching" when I hit the gas. Felt like it was losing power or starved or something, it ...
0
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2answers
515 views

Increase bike speed with acceleration

I enjoy bike riding very much and thats the only medium I use to commute. I have a 200cc bike and it is pretty decent in performance and speed. Now here is what happened. Recently I watched a video ...
3
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4answers
150 views

Does cooler air improve turbo performance?

When modifying NA cars I've always been advised to try and protect the intake from heat soak from the engine bay because the engine performs better with cooler air. This makes sense. I now have a ...
3
votes
2answers
152 views

760li M performance G12 overheating brakes issue

We recently got BMW 760li M performance G12. It has the M blue brakes system, see image below. When driving in extreme mode (it is for officials, almost always in rush mode) the brakes do not ...
0
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0answers
35 views

Polishing internals?

How should I polish the internals of an engine to create a smooth and carbon free surface? I am just wanting to polish the internals with little to negligible amounts of metal being removed. I was ...
3
votes
2answers
92 views

Is it more efficient to drive with the windows down or the AC on?

When driving, is it more efficient (in terms of gas consumed) to use the air conditioner, or to drive with all of the windows down? While the air conditioner reduces efficiency through drag on the ...
0
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0answers
56 views

why is my engine spudering on my 2010 ford focus

I had an oil leak that was going into my spark plug chambers and I had that fixed I thought that that might fix the spudering issues but it didn't and it is still spudering
1
vote
1answer
115 views

Honda civic 1997

PLEASE HELP!! I have a honda civic 1997 and I've just started these classes a couple towns away so I have a 45 minute drive 5 days a week for 3 weeks. I have been forgetting to put oil in it. My car ...
0
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4answers
525 views

Why do most performance cars have longitudinal engines?

Why do most performance cars have a longitudinal-mounted engine? By performance cars I mean sports cars that typically develop at least 400hp and are usually coupes two seaters.
1
vote
1answer
275 views

Why has my 02 Forester lost power?

Engine has new head gasket-water pump-timing belt-new radiator. Now I have no power going up hills. Transmission does not shift in sync. Cruise control shuts off going up hills. Check engine light ...
3
votes
1answer
102 views

Captiva problem

My Captiva Diesel 2007 has a problem going on a distant journey. During short or town drives, it is fine. When it turns to be a long journey, the car turns off after a while. My mechanic tried a ...
9
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3answers
2k views

3 rings vs 4 rings pistons: which design is better?

The engine I'm rebuilding (Skoda Estelle/120, 70's, RWD, rear mounted engine) was manufactured with two different pistons, depending the fabrication years: one piston kind has 4 rings and a cut from ...
6
votes
1answer
176 views

Same engine but different intake manifold design: which one should I use?

The engine I'm rebuilding (Skoda Estelle '72, RWD, rear mounted engine) is the same from previous models, with slight different changes. One of the things they modified was the intake manifold which, ...
5
votes
2answers
1k views

Manifold vacuum vs performance

I've been reading around looking for data on how to interpret manifold vacuum. Why? Well, my original thought was that 0.0hg meant that there was no restriction in the intake system and would mean you'...
3
votes
1answer
686 views

Any means to add more batteries to an electric car?

A lot of the electric cars available today (except Teslas) have too small ranges. Inspecting them I see a lot of trunk that I might want to relinquish in exchange for extra range. However I don't see ...
4
votes
2answers
5k views

Will eliminating factory catalytic converter have effect on emission testing?

I'm not exactly a car guy or know much about cars, but I would love to get some performance headers installed. The problem is that the headers that I found for my car state the following "Eliminates ...
2
votes
0answers
102 views

1992 Ford F-250 4x4 5.8l 408ci stroker tuning questions

I have a 1992 Ford F-250 4x4 w/a 5.8l blocked 408ci stroker attached to a ZF 5 speed tranny running 3.55 gears. On the engine sits a set of 64cc chambered, 190cc intake runner, 70cc exhaust runner, 2....
3
votes
2answers
1k views

What is the difference between Stage 1 & Stage 2 Performance chips for an '89 S10 Blazer?

I have an '89 S10 Blazer with a 4.3 L V6 TBI engine. The motor is all stock and I was thinking of putting in a performance chip in it to get some power out of the V6. I came across the terms stage 1 ...
1
vote
1answer
63 views

What are performance requirements for heavy (commercial) trucks? [closed]

As far as I understand it, DoT regulates heavy trucks on U.S. roads. But I've searched and inquired and I can't find any specific performance requirements that a truck must satisfy to be road legal. ...
0
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0answers
107 views

Honda CRF250X - engine fuel consumption

Does anyone have a power performance and fuel consumption chart for a Honda CRF250X or CRF250R engine?
4
votes
1answer
733 views

Performance Issue - 2009 Infinity FX50

Please, I need help. My care is shaking and this code is appear in comp test p0021 int/v tim cont-b2 1t Please ..i clean the intake valve control timing on both side then after that this code ...
-1
votes
1answer
2k views

Water like drop coming out of the exhaust of the car stops? [duplicate]

Earlier, water like drops come out of the exhaust of my car. I searched web, and it shows that its a good sign. But for last few months after a regular maintenance cycle (Oil, Oil Filter, Air Filter, ...
4
votes
3answers
1k views

Engine gradually loses power while driving highway speeds

When driving my 2006 Ford Fiesta continuously for 6 to 7 hours, maintaining an average speed of 100-120km/h, i can feel the engine gradually gives less power, and it shuts down after. There is no ...
3
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1answer
977 views

Resonance Chambers on Four Stroke

I've seen some full exhaust system which came with a resonance chamber on header pipe for four-stroke motorcycles, this header is shorter than the original one As you can see the original one has a ...
4
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2answers
2k views

How to increase the lifespan of a diesel turbo?

Replacing a diesel engine's turbo costs a lot of money. How should a diesel car's owner drive, park and take care to insure that he/she gets the maximum km/miles out of his/her car's turbo?
2
votes
1answer
130 views

Best quicker faster acceleration NGK spark plugs

What kind of NGK spark plug can I use on my 1990 Toyota Conquest 2E for quicker start and for faster acceleration?
5
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2answers
619 views

can an autogas/lpg system damage the 6.2l v8 corvette engine?

for example, we have recently bought a 2008 chevrolet corvette from the turkish customs, and we converted our corvette to autogas / liquefied petroleum gas in a turkish conversion shop, with liquefied ...
6
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2answers
11k views

Likely cause of poor performance at low RPM but normal at higher RPM?

For a fuel injected, in-line three cylinder 1.0 litre gasoline engine (specifically X10XE I3 found in Opel Corsa B), what is the most statistically likely cause of the following problem, and what ...
3
votes
2answers
120 views

Most effective weight reduction in modern cars?

This question forked from another question about budget performance upgrades from another user. Weight reduction came up, and rather than hijack that discussion, I thought I'd start a new one here. ...
3
votes
0answers
90 views

How to adjust power for 1st & 2nd gear in classic 350?

i am facing loss of power with 1st & 2nd gear while accelerating after changing gears. As soon as RPM goes high the power becomes stable. I want to know that which type of setting should be done ...
5
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2answers
85 views

Why isn't the Pikes Peak Hill Climb used as a benchmark for automotive companies?

I know this is in exactly a technical question but the outcome of automotive companies actually doing this would bring technical benefits that I don't think we're currently doing towards right now so ...
10
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2answers
751 views

40MPG at 100MPH?

Around 1987-1988 I had a Ford Fiesta/Festiva. I was in the Army and regularly made weekend trips, driving from southern California to Central Washington a trip of about 1200 miles. I would leave in ...
11
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4answers
11k views

What is gained with “performance” spark plug wires?

When heading to the store to pick up a new set of spark plug wires, I found three products at this particular shop: Product #1: Price: Cheap Boots: EPDM Core: Suppression Insulation: EPDM Max Temp: ...
6
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3answers
932 views

Please help with my Intake for Opel Corsa 2014

I have an Opel Corsa D 1.4 turbo. I have bought a Conic Air Filter, but I need to know what I can do to make a better installation. I don't think that I have a good one, because is too close to the ...
4
votes
1answer
121 views

Remapping a used engine

I appreciate that a performance increasing remap is likely to increase the rate of wear and tear on certain components inside an engine bay. Is remapping an engine that already has 50k miles on the ...
9
votes
3answers
24k views

What is the benefit of Forged Internals in an engine? Pistons, etc

I've heard of these for years and not fully understood the benefits, can someone elaborate? Frequently the vehicles with forged internals have serious boost pressures, but I've also heard of naturally ...
2
votes
2answers
508 views

Torque reduces gradually after certain RPM

I just know the plain definition of the Torque. Torque: Definied as the force applied to the object to rotate on its axis The torque will be increased only upto a certain RPM and it will gradually ...
3
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5answers
2k views

Increase my cars BHP?

I have a corsa, it's very slow and sluggish. It's my first car and feel like it could do with something to give it a kick. Here's my specs any reccomendations what I can do with it?
5
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2answers
4k views

What are the consequences of using an expired tire?

Based on this answer I know that the consequences are less security and low performance. But I would like to know if there is anything else and also explain those two issues and why do they happen ...
35
votes
5answers
44k views

What are the benefits of a lightweight flywheel and why aren't they lightweight already?

This previous question explains what a flywheel does and why it is needed. That explanation means that the flywheel needs a certain amount of mass to do its job. However, an "upgrade" for many cars (...
6
votes
1answer
783 views

Why do modern vehicles omit a temperature gauge?

I'm more specifically interested in performance vehicles. My current car has gauges for coolant temperature, oil temperature and oil pressure. The coolant temperature gauge is there so you can tell ...