TECH TALK - ask your technical car questions
- boganbusman
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TECH TALK - ask your technical car questions
Recently I've noticed a fair few people asking questions about cars, like how do turbos work, and stuff like that. So I thought it might be a good idea to make a thread where you can ask your questions about cars.
There are plenty of people here who know lots of stuff about cars, so ask your questions and they should get answered. Just ask anything, it doesn't matter how stupid it might seem.
Cya later.
There are plenty of people here who know lots of stuff about cars, so ask your questions and they should get answered. Just ask anything, it doesn't matter how stupid it might seem.
Cya later.
Last edited by boganbusman on 12 Jul 2007, 13:41, edited 1 time in total.
- Andre_online
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- boganbusman
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I don't have any questions about "Tech Tallk", but I'll post a link of a website which has the answers to alot of car-related questions
http://auto.howstuffworks.com/
http://auto.howstuffworks.com/
- MarlboroMan
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dear boganbusman,
i am a poor man that like to mod car, and i am looking for a Apex-i S-AFC II to fit on my charade(swap 4E-FTE). i wonder that you have any idea about it
question :
if my ECU got a fuel cut at a particular speed, does the SAFC II can bypass the fuel cut (since the SAFC got a basic fuel map function)??
thanks
i am a poor man that like to mod car, and i am looking for a Apex-i S-AFC II to fit on my charade(swap 4E-FTE). i wonder that you have any idea about it
question :
if my ECU got a fuel cut at a particular speed, does the SAFC II can bypass the fuel cut (since the SAFC got a basic fuel map function)??
thanks
- boganbusman
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If you're getting an aftermarket ECU, the fuel shouldn't cut out unless you program it to do that.MarlboroMan wrote:i am a poor man that like to mod car, and i am looking for a Apex-i S-AFC II to fit on my charade(swap 4E-FTE). i wonder that you have any idea about it
question :
if my ECU got a fuel cut at a particular speed, does the SAFC II can bypass the fuel cut (since the SAFC got a basic fuel map function)??
I don't know what exactly a SAFC-II is, so you should really talk to an expert about it (i'm no expert). Or there might be someone else around here who can help you out.
But now I've got a question for you: Why are you modding a Charade?
- EmptyWords
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- boganbusman
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'Cat' is short for catalytic converter. It's usually placed right after the headers in the exhaust system. It contains materials inside it that 'filter' most of the bad stuff out of exhaust fumes. Without one (or two) of these, you car cannot be roadworthy, because of emmision laws.
Some people leave them out because they restrict the airflow of the exhaust, thus reducing power. High-flow cats are available, but they still restrict power a fair bit.
They look like this:
Hope that helps
Some people leave them out because they restrict the airflow of the exhaust, thus reducing power. High-flow cats are available, but they still restrict power a fair bit.
They look like this:
Hope that helps
- EmptyWords
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- MarlboroMan
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well i think the Apex-i S-AFC is somewhat a small electronics "stack" up to the ECU and alter the reading value in the ECU. it is doesn't work as stand alone ECU. If convert, its around 400 aussie for a piece, V-AFC is basically the same thing, but it can define the VTEC activation rpm function (only VTEC i think, not applicable for other variable valve timming valve lifting system)
i think for this price and such a product its quite worth it.
why i am modifying a charade ?
1)because my parents gave me one.
2)i am poor
i think for this price and such a product its quite worth it.
why i am modifying a charade ?
1)because my parents gave me one.
2)i am poor
- boganbusman
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Still ,a charade doesn't really have much potential. I understand that you're poor (so am I), but you're probably better off investing your money to buy a better car.MarlboroMan wrote:why i am modifying a charade ?
1)because my parents gave me one.
2)i am poor
Anyway, I think I understand you question a bit better now. You want the SAFC thingy to prevent the ECU from cutting the fuel, correct?
I looked it up and to me it seems like a pretty fancy unit (It's got a VFD display monitor and stuff like that). From what I've read, it does seem like you can prevent the ECU from cutting fuel at a certain RPM.
Also, what sort of power gain are you expecting to get from this thing?The new Super AFC-II can save two data setting from data collected with respected to air flow adjust rate, throttle duration, engine RPM, etc
- MarlboroMan
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- boganbusman
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- boganbusman
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I've never heard of an up-pipe either. If it does exist, then it's probably just the pipe that goes from the turbo compressor to the intercooler/manifold.Sweeper wrote:Do you know what this "uppipe" is? I know what the downpipe is, but never heard of the uppipe, if it even exists.
I'm assuming that you're not talking about 21" or bigger wheels . . .^Sparco^ wrote:Is the stock rims size of a car always the better size?
Wheel size is ultimately unimportant unless we are talking about open-wheeled race cars.
Bigger or smaller wheels will not really effect handling. But, it will adjust the speed of your car. Bigger wheels will give you the same effect as taller gearing, and will also give you an incorrect speedo readout. But of course you can adjust your gear rartios and speedo to make it normal again. Smaller wheels will of course mean the opposite.
But for manufacturers, there are two main resons why the stock wheels are relatively small:
1. They are much more expensive (bigger tyres are also more expensive)
2. Most customers don't like the look of humungous wheels.
So no, manufacturers are not stupid. The only thing that really matters about wheel size is the width and offset of the wheels.
And one last thing: If you're going to fit bigger wheels to your car, remember to lower the suspension a bit, because your car will be slightly taller. And remember to adjust the speedo, and the gearing as well if you feel it's necessary.
Hope you understand that (it's sorta hard to explain)
- MarlboroMan
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but when bigger rims comes in i think you are able to fit yourself bigger tyres (width of the tyres especially), and i bet you are able to fit bigger brake calipers and disc too. i think else than good looking and what Boganbusman said, it will improve grip, since the contact surface between the tyres and road increase, and for the bigger/better of brake calipers and disc installed, stopping force.
thats what i think but i dunno whenever it is correct.
thats what i think but i dunno whenever it is correct.
It could be serveral things. A Turbo really doesn't have a "Up-Pipe". The pipes/tubes/what ever you want to call them that run out of a turbo are of the following.Sweeper wrote: Do you know what this "uppipe" is? I know what the downpipe is, but never heard of the uppipe, if it even exists.
-Intake Pipe on the Inlet side of the Turbo that has the Air Filter
-On the Exhaust side of the turbo is the o2 Housing (if turbo is equiped with one) then goes into the Downpipe.
-The J-Pipe. As some may call it is on the underside of the Turbo. This pipe goes from the Turbo and to the Intercooler.
-Another possibility what a "Up-Pipe" may be is the Upper Intercooler Piping that comes from the Trottle Body and to the Intercooler. This pipe contains the BOV that releases extra pressures the Turbo makes and releases back into the Intake Pipe of the Turbo or in some cases some people Vent their BOV's into the engine bay.
I have never heard the word Up-Pipe before. Some people call things differently than others. Hope this little info cleared some things up for you.
- boganbusman
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Yeah that's pretty right MalboroMan. Bigger wheels allow for bigger brakes, but smaller brakes are capable of being just a good as larger brakes (albeit at a higher cost).MarlboroMan wrote:but when bigger rims comes in i think you are able to fit yourself bigger tyres (width of the tyres especially), and i bet you are able to fit bigger brake calipers and disc too. i think else than good looking and what Boganbusman said, it will improve grip, since the contact surface between the tyres and road increase, and for the bigger/better of brake calipers and disc installed, stopping force.
And wheels can be wide without being tall as well.
It's all about compromise. But at the end of the day, wheel size doesn't make a big difference.
Edit 24/7/06: After learning more about suspension systems etc, I just need to correct a couple of things regarding wheel sizes.
Ideally, a car wheel should be as small and light as possible, to reduce the unsprung weight. Less unsprung weight will allow the wheel and suspension to follow the road surface with much more ease and accuracy, thus giving you better roadholding.
A smaller wheel will also allow the car to have a lower waistline along the quarter panel, as well as less rotating mass which will improve engine response.
@2gTSiAWD: Thanks for the contribution
Last edited by boganbusman on 25 Sep 2006, 09:29, edited 2 times in total.
- MarlboroMan
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dear 909,
about "blue print the block", i am not quite sure about it,
to me, "blueprint the block" most probably mean that make a plan of the engine block with new spec (such as bigger bore diameter, new material), send it to some cold forge factory to custom forge it as the plan. so the whole engine block is in 1 piece, forge items can take more punishment than regular mold ones.
about "blue print the block", i am not quite sure about it,
to me, "blueprint the block" most probably mean that make a plan of the engine block with new spec (such as bigger bore diameter, new material), send it to some cold forge factory to custom forge it as the plan. so the whole engine block is in 1 piece, forge items can take more punishment than regular mold ones.