21 replies to this topic

[MRA]

Errr isn't something missing

[Pending]

Errr isn't something missing

you mean this

[MRA]

Thats the bit ..... what size engine is that ?

[crock]

Split Webers are a good fit for Mini's because you can actually fit them with a rational intake manifold, no bulkhead modifications, and reasonable air filters. Set up with appropriate choke sizes they will give better throttle response than any SU at the expense of fuel economy. I set up three split Weber combos in Minis during my rolling road days. They work really well though dialing in the proper choke size is expensive if you have to pay for every size you try. Fortunately for my customers I only charged for the ones they drove away with. In my humble opinion Webers deal with long duration cams better than SU's though I will bow to any British rolling road operator who becomes an expert at SU's and says they work better. In America most people who go for hopping up an A series put on a Weber straight away as we Yanks don't really understand SU's. The split Weber combo can be set up for any 1275+ engine (I have never even seen a 1000cc Mini). My experience shows that if you have a 266 cam or less, then the SU gives the same top end performance , the same low end, and about 20% better fuel economy. Cams from 266-286 are a grey area. I can get better performance from split Webers but in Britain you certainly have people better at SU's than myself. Once you get to 286+ cams there is no question in my mind, Webers rule because they can give you more low end response and more top end power. The Webers give you better low end response the old fashioned way - they spit petrol at it, literally. I don't know about fitting 40 DCOE's in the split configuration because i never tried it. It could work well with street cams because one of the 45 DCOE cars I tuned made best power with a 32mm choke so that is in the standard 40 DCOE range. The split Weber manifold's are made with 45 mm sizes in mind so I don't know the 45 vs 40 DCOE influence with the manifold.

In short, I think a split Weber installation is a good set up for 1275+ engines and I am surprised it is not more popular. The problem with a single Weber in a Mini is you just can't find a place to put if you want to run a rational intake manifold and an air cleaner..

[MRA]

By definition a tuned engine is exactly that !

It means all the parts used are matched for their abilities and are designed to work together, A tuned 850 with a Weber will according to Dilligaf be better than an SU ? The poor thing will never get going and by the time it does it will be at the redline.

What I said was that you have to pick the carb to suit the camshaft, if you have a 320 degree camshaft, its obviously not for Granny to go to church on Sunday, therefore a Weber would be a good choice, however if you want to build a fast 1380 witha 276 then an HIF44 is a better choice because this engine setup is more suited to fast but everyday use.

One will be a screaming race engine the other a road driveable road rocket.

[MRA]

Thats right move the goal posts to make what your saying relevant............useful as always.......You probably don't know this but the sevens when they where 850's used half a 45........
And your wrong about the cam as well, you've obviously not had a weber or you'd know they pull up the torque of the engine.......It's all down to the clever design of the auxiliary venturi and it's effect on the main jet. But there I go teaching you again..........

Im going to answer this one in the same manner that you do.... (sorry to everyone else)

Why are you talking about goal posts ? to my knowledge they have never been a standard item on a mini ever !

Don't tar me with your own brush, I was building 848cc racers when you where still in your nappy !

I have definately owned more Webers than you will ever own, and most models too including IDA, DCOE etc and you will never get a DCOE to outperform an SU from tick over and still get the most power from the top end, its all to do with this clever thing called physics !

You a teacher don't make me laugh, you couldn't even teach my granny to suck eggs.............................................. and she's been dead 30 years

So please stop spouting total rubbish and start by talking sense, you are beginning to bore people now !!!

[MRA]

Thats right move the goal posts to make what your saying relevant............useful as always.......You probably don't know this but the sevens when they where 850's used half a 45........
And your wrong about the cam as well, you've obviously not had a weber or you'd know they pull up the torque of the engine.......It's all down to the clever design of the auxiliary venturi and it's effect on the main jet. But there I go teaching you again..........

Im going to answer this one in the same manner that you do.... (sorry to everyone else)

Why are you talking about goal posts ? to my knowledge they have never been a standard item on a mini ever !

Don't tar me with your own brush, I was building 848cc racers when you where still in your nappy !

I have definately owned more Webers than you will ever own, and most models too including IDA, DCOE etc and you will never get a DCOE to outperform an SU from tick over and still get the most power from the top end, its all to do with this clever thing called physics !

You a teacher don't make me laugh, you couldn't even teach my granny to suck eggs.............................................. and she's been dead 30 years

So please stop spouting total rubbish and start by talking sense, you are beginning to bore people now !!!

LMAO Your about 10 years younger than me martin, at least......you obviously don't remember. In my loft 4 x 28x36 DCD's, 1 Pair of 42DCNF's, 2 x 45DCOE's, 1x 38 DGAS, 1 x 40 IDF.

Fitted my first 45 back in '84 and have run most of these carbs on A Series engines since..........

Maybe you should fit one of your 45's on a standard engine and see what it does to the bottom end torque.......

Is there any need to mention my granny, you never knew her and that is just been ridiculous........

Talking rubbish thats a good one, coming from you, as can be blatantly seen from your above comments...........

Start reading posts Dilligaf, nothing was said about your granny, asafew people on here will know I have been building mini engines and supplying parts and services for over 30 years,that takes me to 1983 at the absolute minimum, I find it facinating that you so easily think that you are above everyone else including David Vizard and the amount of dyno tests that David has done...

People turn to page 85 of DV's yellow bible, note Figure 7.4 backs up what I have said above, also notice that it doesn't say written by Dilligaf.

Edited by mra-minis.co.uk, 10 March 2013 - 11:05 PM.