165 replies to this topic

[al_reidy]

Hello Mr Turbo....

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[StewartB]

Don't suppose that was the turbo for sale on the micra club was it? I was tempted!!

[al_reidy]

no - eBay job.

also got an almera fuel rail + injectors for it.

i hope it fits the engine bay!

[smudger068]

I suspect you will be going over the gearbox with this one?

[slack]

Great but It's reliable a k11 micra with turbo for daily drive?

[l_jonez]

The cg13 can handle boost fairly well, once properly set up then it should be as reliable as a stock engine.

[al_reidy]

i need to be able to get more traction, currently without the turbo it does like to spin the little 10x5" rims.

I'm thinking of some medium compound yoko semi slicks.

once that is sorted then i can imagine it being capable of a daily drive, perhaps it would be wise however to fit a roll cage and mahoosive breaks.

i would like to have a stab at the trini-mini micra servo conversion if my fabrication brain can figure it out.

[ibrooks]

Can your existing brakes lock the wheels? If the answer is yes then fitting "better" brakes is just a waste of effort as you will not be able to slow the car any faster than you can at the moment.

[smudger068]

Can your existing brakes lock the wheels? If the answer is yes then fitting "better" brakes is just a waste of effort as you will not be able to slow the car any faster than you can at the moment.

 

I believe this no to be strictly true! 

 

I proved this after installing 300 mm brakes to my fiesta 1.6 Tdci. Especially at high speed the vehicles braking system gives more confidence that it is going to stop. Just because a vehicle can lock its brakes doesn't mean more stopping power would be beneficial. 

 

I dont know what brakes this chap has but lets say they are standard, they will be best suited for something that is say 60-70 hp let alone that he has a micra engine say 80-100hp spec dependant, then he wants to strap a well controlled turbo to it, so 120-150+ spec dependant.

 

Upgrade your brakes!  

 

Lee 

[smudger068]

 

Can your existing brakes lock the wheels? If the answer is yes then fitting "better" brakes is just a waste of effort as you will not be able to slow the car any faster than you can at the moment.

 

I believe this no to be strictly true! 

 

I proved this after installing 300 mm brakes to my fiesta 1.6 Tdci. Especially at high speed the vehicles braking system gives more confidence that it is going to stop. Just because a vehicle can lock its brakes doesn't mean more stopping power would be beneficial. 

 

I dont know what brakes this chap has but lets say they are standard, they will be best suited for something that is say 60-70 hp let alone that he has a micra engine say 80-100hp spec dependant, then he wants to strap a well controlled turbo to it, so 120-150+ spec dependant.

 

Plus he is already talking of changing the tyres

 

Upgrade your brakes!  

 

And yes a cage i would too

 

Lee 

Edited by smudger068, 13 January 2015 - 01:20 PM.

[al_reidy]

I currently run the biggest breaks I could to fit under my wheels of choice.
7.9 " mini sport 4 pot alloy non-vented.
I should have gone vented but it would foul on the rim without massive spacers.

[smudger068]

I currently run the biggest breaks I could to fit under my wheels of choice.
7.9 " mini sport 4 pot alloy non-vented.
I should have gone vented but it would foul on the rim without massive spacers.

 

Sounds like you only have a pad choice to determine the best for you 

[ibrooks]

 

 

Can your existing brakes lock the wheels? If the answer is yes then fitting "better" brakes is just a waste of effort as you will not be able to slow the car any faster than you can at the moment.

 

I believe this no to be strictly true! 

 

I proved this after installing 300 mm brakes to my fiesta 1.6 Tdci. Especially at high speed the vehicles braking system gives more confidence that it is going to stop. Just because a vehicle can lock its brakes doesn't mean more stopping power would be beneficial. 

 

I dont know what brakes this chap has but lets say they are standard, they will be best suited for something that is say 60-70 hp let alone that he has a micra engine say 80-100hp spec dependant, then he wants to strap a well controlled turbo to it, so 120-150+ spec dependant.

 

Plus he is already talking of changing the tyres

 

Upgrade your brakes!  

 

And yes a cage i would too

 

Lee 

 

 

So your "feeling" more confident is "proof" - if that's good enough for you then spend your money wherever you like.

 

For those with a more scientific approach (any real engineers or scientists reading please forgive the terminology - I'm simplifying for common language). Any retarding force applied by the brakes must be transmitted to the ground by the tyres. Once they have lost grip and started sliding then they are not doing this. The max "braking" you can possibly achieve in any given situation is therefore the point just before the wheels lock. If a 7.9" disc and your current master cylinder and calipers can supply that force without undue pressure being required from your foot then that's as good as it's going to get.

 

Bigger discs may allow you to reach that force without so much effort from you on the pedal but beware. Making it too easy to lock the wheels will tend towards making you lose control when you need it most. No matter how great we all think we are at driving the unexpected happens and when it does instinct takes over - unless you have serious training behind the wheel that instinct is 99% of the time to stamp on that centre pedal as hard as you can and it's very hard to over-ride that (even if you can it takes time which you usually don't have in those situations). If you've gone for mega-soopa-doopa brakes that'll lock the wheels when you sneeze on the brake pedal then that's what will happen and largely from that point on you are a passenger.

 

A servo can be the same as the above - it may help you use the brakes you've got to their maximum potential or it can go too far and in reality make you less safe.

 

Vented discs may help as they allow the brakes to be used more often at their max before heat buildup becomes a problem.

 

I ran my Clubby with over 100bhp on tap on Cooper S 7.5" discs and the standard master with no servo and never felt lacking in braking.

 

Iain

[smudger068]

I really dont want to start a debate on this chaps thread

 

But. 

 

Its a fair point in what you are saying and yes i agree.

As for the feeling of being more confident i mean that when i hit the brakes at 110-120mph by the time i got down to 40 or so mph the peddle hadn't gone soft! The reason i say more confident is because i haven't actually measured it. 

To be honest i think we are expressing different things here. 

I don't believe that just because you can lock your brakes that should be a measure of whether you should upgrade the brakes or not. 

As in upgrade i mean, it can be calipers, discs or even pad compound. 

And yes i agree there, there does become a point to were you go for twin pots to four pots, to some extreme KAD 6 pots but my point is as i have said before just because you can lock the brakes shouldn't be a measure to whether you need to upgrade the brakes. 

 

Lee 

Edited by smudger068, 14 January 2015 - 03:21 PM.

[ibrooks]

OK - I'll concede that I was making assumptions too and yes an upgrade doesn't just mean going for the biggest discs and most pistons you can. I was led into that by Al saying he may fit "mahoosive" brakes and your mention of 300mm discs on your car.

 

It does bear thinking about though for anyone reading and thinking that increasing the power of their engine means they must go out and fit bigger brakes - it's often simply not necessary. Think about and understand what you actually need from your brakes before just going out and changing them.

 

Iain