They're On!

[MrG 3]

now I'm getting adventurous in my DIY?

 

I've serviced and fitted a pair of 45 weber's on my 1.9. Certainly a trial and error due to the alternator bracket needing 'adjustments' but now they're fitted and I have no water leaks it runs! And I have to learn how to start the thing though from cold.

 

However it revs well and certainly has a bark about it, and the next thing is get them set up correctly on a RR, but it idles low. Is this something to adjust myself or should I just get it to this guy in Royston and let him sort it all out?

 

How long should I effectively 'nurse' them when starting/idleing or is it a case of just having a go and see how they behave? Do these set ups become sensitive to poor plugs/cap and rotor arm as I'm going to change these as a matter of course.

 

I've done a search but most stuff is on the Mi so appreciate the replies.

 

Thanks

 

Andy.

[ashley peddle 3]

nice one fella!!!!

 

they take a while to get used to... just give it a press or 2 of the accelerator before turning the key (but no more or youll flood it) then turn the key and one more press as it fires up

 

must have sounded awesome in your car port!

[MrG 3]

cheers Ash, it did you were right although I finished at around 9.00 so didn't want to be unsociable!

 

I think I flooded it first time around as it popped and banged a bit but revved a few times and it was nice and crisp, just need to sort the idle etc out, will try and use your guy in Royston in the next week or so.

[Baz 421]

Awesome! Take a bit of getting used to to start, and need nursing for 30secs or so if no chokes. Can't wait to get my 1600 on them aswell!

 

Royston? That Baldwin? Could see how busy Tom is down the road in Birchanger Andy, TCSPerformance. He's played with carbs for years and has all the bits in stock if anything's needed.

Edited August 6, 2008 by Baz

[Atari Boy 11]

How easy were they to fit Andy?

[mfield 20]

Setting the idle is pretty easy if you've managed to install the carbs.

 

You need to wind all the idle mixture screws down untill (very) lightly nipped up, then unwind them all 2 and a half turns. Near to the mixture screws you should see a brass blanking plug, when you refurbished the carbs you might have noticed that under the blanking plug is a series of small holes 3 maybe 4 ?

If you remove two of the blanking plugs, one on either carb. Now adjust the throttle stop untill you can see the main throttle butterfly covering one of the holes i mentioned earlier under the blanking plug. Adjust it untill you're happy that you can repeat the same posistion on the other carb. Now adjust the balance screw in the middle of the carbs untill both butterflys are posistioned the same.

You'll need to unwind the throttle stop now or you'll have a very high idle

 

It should start up fine and run pretty smooth, to get the idle mixture closer turn the screws out a quarter of a turn along all four taking note of the idle speed, keep adjust a quarter of a turn untill the idle reaches a peak speed then starts to decrease, when this happens just wind the screws in half a turn, you'll need to reset the throttle stop and away you go.

 

I used to always set my timing at 10 degrees TDC for carbs.

 

All that should see you ok untill you can get to a rolling road

[ashley peddle 3]

as above - mark kindly set mine up for me and it got me to the rr... i have to say it was quite good fun before they were set up - it popped/banged and produced quite impressive flames out the exhaust

[MrG 3]

Thanks Guys, Mark thats invaluable so will have a go over the weekend.

 

Jonny, they weren't hard to install, the biggest headache I had was the alternator bracket fouled the inlet manifold, therefore I spent more time grinding and altering that to accomodate the inlet than I did installing the carbs.

 

And also removing the ECU due to the tightness of the area where thats fitted.

 

I had a few leaks when first starting up, and as that was mainly petrol I needed to sort those, and I had a coolant leak but that was due to the inlet manifold not fitting flush at the time of fitting, but apart from that they were fairly easy.

[pike_1.9cti 0]

Setting the idle is pretty easy if you've managed to install the carbs.

 

You need to wind all the idle mixture screws down untill (very) lightly nipped up, then unwind them all 2 and a half turns. Near to the mixture screws you should see a brass blanking plug, when you refurbished the carbs you might have noticed that under the blanking plug is a series of small holes 3 maybe 4 ?

If you remove two of the blanking plugs, one on either carb. Now adjust the throttle stop untill you can see the main throttle butterfly covering one of the holes i mentioned earlier under the blanking plug. Adjust it untill you're happy that you can repeat the same posistion on the other carb. Now adjust the balance screw in the middle of the carbs untill both butterflys are posistioned the same.

You'll need to unwind the throttle stop now or you'll have a very high idle

 

It should start up fine and run pretty smooth, to get the idle mixture closer turn the screws out a quarter of a turn along all four taking note of the idle speed, keep adjust a quarter of a turn untill the idle reaches a peak speed then starts to decrease, when this happens just wind the screws in half a turn, you'll need to reset the throttle stop and away you go.

 

I used to always set my timing at 10 degrees TDC for carbs.

 

All that should see you ok untill you can get to a rolling road

 

Is this the most effective way (without a carb sync) to balance carbs?

 

also with the idle mixture screws. should they all be the exact amount of turns out even after a RR?

[mfield 20]

Is this the most effective way (without a carb sync) to balance carbs?

 

also with the idle mixture screws. should they all be the exact amount of turns out even after a RR?

 

It's the most effective way I've found, you can use a bit of pipe from your ear to the trumpet and listen to the intake sound, but I'm pretty def and rely on my other senses e.g. sight

 

The holes I mentioned earlier are the progression holes, I couldn't remember the name before.

 

I'd prefer to use a syncrometer and would recomend getting one, I found my carbs went out of balance every couple of months a little bit. I always thought thats why people have to keep getting them setup again ?

 

I have no idea about the idle mixture screws after a RR session, Tbh i doubt it makes much difference because once the Throttle butterfly is opened the fueling is down to the main jets. If it passes an mot and is smooth and steady I wouldn't worry

[MrG 3]

OK further to this, I have a problem, the reason I think it won't idle is, I still have a leak from the inlet manifold, its still not quite flush with the head due to the alternator bracket fouling (only bu a bit though), so an appointment is to be made with Mr Grinder again tonight to tackle this.

Is there any pictures of an 'adjusted' bracket at all or is it a case of doing what I'm doing and removing bits, refitting, and grinding back till its a close fit?

 

Pain but I'm glad I found out now rather than half way round Cadwell Park.

[ashley peddle 3]

its trial and error mate - there is no skill to it what so ever! just remeber to cover up the ports if your doing it with the bracket still on the car...

 

are you using rtv on the inlet manifold or just a gasket?

[MrG 3]

I plug the ports so they're safe. I have a std gasket and I have some rtv if needed.

[ashley peddle 3]

personally id just use rtv mate - never got on with the gaskets!

[MrG 3]

well it'll seal any imperfections I suppose. I'll give it a go over the weekend thanks.

[MrG 3]

ok they're back on and so far no leaks, the leak it did have was so small it barely registered, still I ground more off the bracket and the fit was better this time around.

 

Anyhow filters now on, they sit close to the slam panel so that'll be off mid week for some attention. Sounds well lush though, revs well, but will give Marks set up a go maybe monday, messing with oil and petrol has given me a headache so I've called it a day.

 

Baz, I may well do that if this chap is busy, as I'd like to have it running for Cadwell Park end of this month if I can.