Passed on the mirrors and indicators.

Failed on the brake ballance again.

Last time Got it right on the ballance, but failed on the roll pins.

Got the roll pins in, and now the back brakes have bedded in rather too nicely, they have doubled in their braking efficiency since the last test, so we are back to the front / back ratio again.

At least I have 240 miles on the clock and all should be bedded in now.

So I need to move the ballance bar again or fit a restrictor in the back line.

Can someone confirm that to increase the front braking pressure you screw the bar over to that side, ie move the pivot ball towards the Mastercylinder that you want more braking effect on.

Whats more it rained on the way home. didnt get too wet, but was a bit cold and painful on the face.

Have new re-test booked for thursday.

Not knowing your brake setup, but I would wind your bias all the way to the fronts.
Your rears will still work.
Try to drive it again as see what happens.
If the rears still lock first, then you should go the restrictor route.

Can't remember which way to wind the bar, but you will be able to see which master cylinder moves first.

[Edited on 16/5/2006 by nitram38]

I also have a Viento, I have adjusted the brakes so that the front grab quite soon as you press the pedal, wind pivot point towards the master cylinder that you want to act first. On a loose surface the front lock way before the back and i can lock the front on the road with a good press but cant lock the back .

With on a loose surface the rear actually pushes the front with both front wheels locked, that 200lbs of torque for you, lets see a BEC do that.

Good luck for the next time, your must surley pass this time .

quote:

---

Originally posted by nitram38
If the rears still lock first, then you should go the restrictor route.

---

quote:

---

Originally posted by Liam

quote:

---

Originally posted by nitram38
If the rears still lock first, then you should go the restrictor route.

---

If you can't get the balance right with the bias bar, your master cylinder sizes are wrong. Shouldn't need a restrictor aswell.

Liam

---

Stick a fiat uno valve in the back line, it will give you all the fine adjustment you need.

Right.. Just got in from the garage.

It appears that I had the lock nuts too tight against the clevis joint bit. This prevented the correct movement of the bar, thus changing the bias.
I have loosed it off a tiny bit, and will check tomorrow after having read the info from Snoopy (Thanks snoop!!)

I was just a little over adjusted on the nuts. Can lock the front wheels every time now. Been testing in the street.. Bet the neighbours are tut tutting behind the net curtains

Have also had BIG problems starting when hot. a search on the internet dug up info on weber carbs on RV8's percolating the fuel when hot and not running. This seemed to be the answer, so I got a nice edelbrock Heat resistant spacer, and fitted it. However the problem has got worse on todays run and had severall stalls at critical moments going to chelmsford. I'm grateful to my 18 year old son, who bump started me 6 or 7 times today, even on the A120, and at lights in the town.

Having fitted the spacer on the carb, I thought it could be something else.
I thought it may be coil related, ie not getting enough volts when cranking. Although it started well when cold.

So I put my test meter on the coil, and all the volts were there at the appropiate times. This is a Straight 12v non ballast sports coil. No change.
So I got a spare plug and checked the spark. Well what a WOOSY spark I can create more electricity rubbing my T shirt in the dark

I have temporarily lashed up a ballasted coil I had spare in the garage, and it now starts every time even when hot.

So tomorrow I have just got to change the coil over and fit the resistor.
Looks like the coil is breaking down when hot.
The spark is much better, but still not brilliant, so I will be thinking of a MSD to liven things up a bit. Thats once I have the SVA sorted.

Lastly, I am most grateful for all the help and support you chaps have given me, especially whilst doing the SVA thing.

Hopefull the next visit will be the last

Can you post some pictures of your brake bias setup please...

Also please tell me what sizes of master cylinder you are running and - when sitting in the drivers seat, which is on the left and which is on the right.

Thanks.

Sounds like you have nearly sussed it all out.

Interestingly i had similar hot problem. I thought fuel vaporisation too. It got steadily worse till it conked out for good. It turned out to be the ignition amp and coil. Changed both and so far (140 miles) it has been fine.

quote:

---

Originally posted by saigonij
Can you post some pictures of your brake bias setup please...

Also please tell me what sizes of master cylinder you are running and - when sitting in the drivers seat, which is on the left and which is on the right.

Thanks.

---

I had exactly the same issue...

1st test OK, but not pinned
2nd test pinned, but failed on rear bias.
3rd test Pass!

They must have something against Vientos.

All I did was wind the bearing over to the front cylinder and re-pin it. All sorted.

Good luck for the next time.