1971 MGB GT - Added wadding - see page 39

[High Jetter]

53 minutes ago, vtec-e said:

Gunsons still make a Colortune

That's just reminded me, someone on the forum was going to send one to me ages ago - which I'd be happy to lend or pass on to @Peter C if required. Can't remember who it was though

[Dj_efk]

It sounds to me like you could do with balancing the carbs - a length of hose you can hold at at the mouth of each one with the other end stuck in your ear is all you need for this. A colour tune is  otherwise only useful if you have two - one for each pair of cylinders.

[High Jetter]

2 hours ago, Dj_efk said:

It sounds to me like you could do with balancing the carbs - a length of hose you can hold at at the mouth of each one with the other end stuck in your ear is all you need for this. A colour tune is  otherwise only useful if you have two - one for each pair of cylinders.

Colour tune is at the plug, not the carb. Yes, hose was the old trick.

[Peter C]

This wild MPG business has been bothering me ever since I did my man maths on Sunday afternoon. 

I took the MGB to another local Esso this evening.

Last time my fuel gauge was showing just over half (on Sunday, before my road trip), I managed to squeeze about 25 litres (4.5 gallons) into the tank.

I started to fill the tank today, to the point where fuel starting dribbling over the rear bumper and onto the ground.

And only 14.3 litres (just over 3 gallons) went in.

With the ignition switched on, the fuel gauge confirmed that the tank was full.

@Mr Pastry @LightBulbFun You were both absolutely right, the fuel gauge was telling porkies! 

So, if I clocked up approx 100 miles and used approx 3 gallons of fuel, that means that the MGB averaged approx 33MPG. Not 18! 

That's a very impressive figure, although it requires further verification as the exact amount of miles that I clocked up and the amount of fuel that I used is unknown. 

I have taken a mileage reading and will brim the tank again in approx 100 miles. Let's see what happens.

From the petrol station I went home via one junction of the M40. The engine ran fine but I have a feeling that it has less oomph at lower engine speeds. I might tweak the carb mixtures back up a little tomorrow.

I'm definitely winning.

More soon.

 

[chadders]

8 minutes ago, Peter C said:

This wild MPG business has been bothering me ever since I did my man maths on Sunday afternoon. 

I took the MGB to another local Esso this evening.

Last time my fuel gauge was showing just over half (on Sunday, before my road trip), I managed to squeeze about 25 litres (4.5 gallons) into the tank.

I started to fill the tank today, to the point where fuel starting dribbling over the rear bumper and onto the ground.

And only 14.3 litres (just over 3 gallons) went in.

With the ignition switched on, the fuel gauge confirmed that the tank was full.

@Mr Pastry @LightBulbFun You were both absolutely right, the fuel gauge was telling porkies! 

So, if I clocked up approx 100 miles and used approx 3 gallons of fuel, that means that the MGB averaged approx 33MPG. Not 18! 

That's a very impressive figure, although it requires further verification as the exact amount of miles that I clocked up and the amount of fuel that I used is unknown. 

I have taken a mileage reading and will brim the tank again in approx 100 miles. Let's see what happens.

From the petrol station I went home via one junction of the M40. The engine ran fine but I have a feeling that it has less oomph at lower engine speeds. I might tweak the carb mixtures back up a little tomorrow.

I'm definitely winning.

More soon.

 

25 litres is not 4.5 gallons, there are just over 4.5 litres to the gallon.

[Jazoli]

3 minutes ago, chadders said:

25 litres is not 4.5 gallons, there are just over 4.5 litres to the gallon.

Yup multiply the litres by 0.22, 5.5 Gallons

 

 

[Peter C]

Yeah, sorry, I meant 5.5 gallons. 100 miles divided by 5.5 gallons equals 18MPG, as reported on Sunday.

[Noel Tidybeard]

how far are you from Beko? he's got one of those suction gauges for balancing carbs that he uses on the vacuums

[Peter C]

5 minutes ago, Noel Tidybeard said:

how far are you from Beko? he's got one of those suction gauges for balancing carbs that he uses on the vacuums

@beko1987 How far am I from you?

[Dj_efk]

@Peter C you can buy a carb balancing tool cheaply enough - you need one if you’re keeping the MG

[Mr Pastry]

If that 33mpg is genuine and it performs well, there isn't much wrong with it.  Leave it well alone, and enjoy it.

[jim89]

2 hours ago, Peter C said:

Yeah, sorry, I meant 5.5 gallons. 100 miles divided by 5.5 gallons equals 18MPG, as reported on Sunday.

Yebbut your rebrimming sums are correct no? 100 miles, 14.29litres/3.2 gallons...  ~31.5mpg...?

[Christine]

 /\ whs ...The pump says 25 quid   , not 25 litres 

[jim89]

12 minutes ago, Christine said:

 /\ whs ...The pump says 25 quid   , not 25 litres 

To be fair @Peter C did have a schoolboy moment earlier confabulating his 25 litres w 4.5 gallons, but his sums on the refill look good to me (even if the figures are a tad unrefined as yet)👍🏻

[beko1987]

11 hours ago, Peter C said:

@beko1987 How far am I from you?

I'm in Thame. If I'm at the office it's even closer as that's in Marlow.

I do have a water lift gague, although no fittings or adapters (even I don't use it totally correctly tbh)

[Peter C]

At the Flower Farm soiree, @vtec-e had a good listen to the MGB's new sound system and enquired whether I put any wadding into the 6x9 speaker boxes. I hadn't. 

I had an opportunity to correct that today.

I removed the speakers from the boxes, to reveal nothing but two voids.

Rather than buying proper speaker wadding, I popped up into my roof void and nabbed a length of quilt insulation.

Which I stashed into the two speaker boxes.

I re-fitted the speakers, disconnected the other two amplifiers and had a listen to how the 6x9s perform now. It might be my imagination but the sound is significantly softer than before. Win.

Nice, no cost mod.

Thank you @vtec-e

[Christine]

Did you play Itchycoo Park  afterwards ?  

[Peter C]

11 minutes ago, Christine said:

Did you play Itchycoo Park  afterwards ?  

I’ve got that MP3 on my iPhone!