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The K20 is a brilliant engine and one of the most well known Honda engines out there. So it makes sense to have a dedicated forum thread to this engine so we can discuss the common problems and issues. On the K20, there are a few locations that are vulnerable or problemmatic and can need...

On the D16, there are certain weak spots and problematic areas. I'll be posting up some engine issue posts, and hopefully, others can add to them and we can discuss these problems together. The D16 engines are generally dependable and solid units, as long as you adhere to the manufacturer's...

So are all your mods for performance or have you done some styling mods to your car? Which styling mods have you done or are planning to do?

Why can't you get high performance fast road or race camshafts for diesels? Do they work on diesel engines or is there no demand for them?

Just acquired a pristine Fiat 2.0 Twin cam engine from a Fiat 131. Do you have any tips for tuning the engine? It's going to be a transplant in a project I'm working on, more about that when I'm ready to spill the beans. Can they be turbocharged easily? Can fuel injection be added? What...

When they put electric motors on diesel cars to supplement the power and create a plug in hybrid version is it still possible to tune it to make it more powerful?

Does negative camber improve cornering and how much should you apply? I still can't get my head around camber, surely you want all the tyre surface equally on the ground? Then you see those stanced cars, with massive negative camber and practically rolling on the edge of the rims, do these...

Lots of people are talking about toe in and toe out. To my understanding it alters the horizontal angle of the wheels, with the front edge either pointing in our out. Does toe out always improve a cars cornering, is this a blanket tuning rule or does it depend on the car? Do RWD AWD and FWD...

I see that more manufacturers are turning out electric cars, hybrids and non combustion engine powertrains. Does this mean that car tuning is dead or is it still possible to tune and improve an EV?

What car is your favourite out of all the cars youve owned? Why? What did you like about it the most?

What are your thoughts and experiences on fast road camshafts? Are they worth it? Do they make much of a power gain? Do they kill the low down power like many other mods?

What is the difference between a carburetor and a throttle body? From what I can make out they both do the same thing?

Do manufacturers choose a firing order for a specific reason? Surely if you change the crank positions you can have any firing order you want? Why do some V8's fire alternatively and others fire twice on one bank, then once on the other and then reverse this order until all 8 cylinders are fired.

I have heard that a flat plane crank makes more power but what is it and how does it make more power?

Today i've twice had to put up with people cutting a corner across the junction I'm exiting and having to do an emergency stop. Why do people cut corners? It is so dangerous! What other things wind you up about other drivers?

What does a blow off valve do? I know they are needed in Turbo engines but I can't see why you'd want to lose boost pressure?

What is the fastest production street car in the world? Just raw top speed in MPH? Jaguar XJ220 - 217mph Bugatti Veyron 16.4 Super Sport - 254mph McLaren F1 - is it 230 or 240 mph (there seem to be both quoted as the top speed)

What is a TDi? Is this much different from a GTDi?

I know what a GTI is but what does it stand for? Is there a definition for a GTI?

What name have you given your car? Mine is called Betty! It's black and the song black betty from spider bait is one of my favourites so it made sense at the time.

Thinking of getting a Civic but there are so many engine options around. What are your thoughts on the 1.6 and 2.2 Diesel engines? What about the 1.8 VTEC petrol engines compared to the 2.0 VTEC? I really need better economy but I'm feeling a need for more power.

Will bigger capacity fuel injectors make more power in an engine? If I went from 45cc/min to 75cc/min injectors would I make more power? What else would I have to do?

When lowering a car is there a limit on how far you can go? Some cars seem to be sitting with wheels inside the arches. I can't imagine how steering is possible. Most people say around 35mm drop max, does that ring true to you guys?

What are your thoughts on larger rims? Current car is running on 16's and I've seen a nice set of 18's I've checked the clearances and pcds and all that and they will fit ok. Will I need to change my speedo? Will it ruin the handling like some people claim it will? What is it like to drive a...

There are some interesting cars around at the moment What is your current favourite? I'm quite liking the BMW i8 - it just looks so futuristic but I'm sure it will date quite quickly.

Found this handy list of fault codes for VAG group cars... 1111 Engine control module (ECM) - defective ECM 1231 Vehicle speed sensor (VSS) Wiring, speedometer, VSS 1232 Idle speed control (ISC) actuator Throttle valve tight/sticking, wiring, multi-plug incorrectly wired, ISC...

Hi all. What do you think are the best mods you can do on a car? Where would you start and would you do the mods in any particular order?

If you were looking for a car where would you look? I tend to buy cars off mates which seem to be bargains. I know some fellas that search the classified ads until something comes up to tempt them. There are a few that go round all of the dealerships as well kicking tyres. What is your method...

Have you ever lost your car for a while??-/ Perhaps it was stolen, mis placed in a car part or you couldn't remember which street you parked it in. I took 20 minutes looking for my car in a multistory carpark before I realised I was on the wrong floor! .V(.V(.V(.V(.V(

I recall my dad saying "Don't jump start a petrol car from a diesel one" which is a rule that sticks in my mind! Is this true? Why is it a problem surely they all run off the same voltage batteries.

What are your thoughts on these RAM air intakes? They are meant to scoop up more air from the front of the car, does this really work and are they worth the money?

If I put a much longer route from the air intake filter to the engine what would happen to the performance of the car? Would it give me more low end torque or better peak power?

What are your top tools to recommend to someone starting out in modding cars? Is there a little tool or gadget that you find you are always using and has saved you a lot of work? What about hiring tools, does that make better sense?

What does it mean when the brakes make a grinding noise when you apply them? It's not a squeek and they seem to be working on, there is plenty of pad wear left on them from what I can see?

As far as I can make out both do the same job but which is better as an upgrade for a NASP engine a supercharger or a turbo? (Yes I have read the articles on fitting a turbo and I know it's quite hard and costly but still want to know which is the better forced induction option.)

Does it always follow that when you lower a car it is better at cornering? How does this work, surely the car works the same at whatever height it is set to?

What are your thoughts on limited slif differentials? Do they offer more performance than standard diffs? I've also heard that some people weld up the diff completely, why would you do this, surely the wheels have to turn at different rates.

When buying a car from a dealer I was wondering if you are offered a Trade deal or a sold as seen deal do you have any comeback if the car turns out to be faulty or has a problem?

How do engine tuners increase horsepower? Are there some tried and tested methods and parts they use? What do you recommend are the top and best ways to make more Horsepower?

When you over tune an engine or run it on the track heat can be a big problem, so what are the best ways to keep an engine cool?