Supercharged Tranny?

[snakemaster]

Sorry i forgot to put a , in between a better van ,the LDV van can cruse at 90 in8) in ^ there

[100ps_drw_hicube]

ye im with you on that a ldv can cruise at 90 90kmh

[AndyG]

Those L*vs don't weigh anything and 90 on their speedo is about 65 on mine

[Weegee]

pmsl , anyway - back on topic

selling the supercharger is a no goer, as i got such a bargain with it, it would kill me to sell it. I really want to put it on the tranny.

A couple of points,

The air flow rate, and pressure is much less of a problem than with a turbo, because the supercharger is totally linear throughout its range, and i can specify exactly how much boost i want by adjusting the pulley size.

I cant stand LDV vans also, as someones signature says, The Tranny is the van that you ALWAYS promised yourself

What differences are there to the fuelling of the turbo 2.5 as oppossed to the no turbo, as i belive in this may be the key. As there is no instantanious boost with the s/c i dont need to worry about the additional stresses, as the power is very smoothly applied, so it shouldnt need any headwork done, and it will also run lower boost than a turbo.

I think what i am asking is>>>>>

As the boost is totally linear, and rises in perfect harmony with revs, and the fuel does also, thanks to the design of the fuel pump. Can i stuff in a bit more air, and just turn the fuel up a bit? Nice and simple and not to complicated. Im not fussed about mountings ect, as i can manufacture bits like that without too much hassle, and i can get longer fan belts ect without any problems.

Thanks for your input so far guys, its great to meet like minded folks.

Oh - on a side note, the axel, im dont really understand how the final drive ratio affects performance, and how it related to tyre size ect. In one of the earlier posts in this thread, there is a specific axel mentioned, what makes this axel better than any other axel? Im not questioning the wisdom of the poster, just more curious about how the bits interrelate with one another. If anyone knows of a site which explains final drive ratios ect, a link would be appreciated.

Many Thanks

WeeGee

[100ps_drw_hicube]

you mentioned you have a 5.14 ratio diff at the mo well thats slightly better for acceleration but not as a good for top end speed as the 4.63

[AndyG]

Let's make the rear axle issue as simple as possible

Stay in first gear and pull away-you have good acceleration pulls with no effort and the steepest hill won't faze you But look at your maximum speed not very high

Now select second gear and pull away Much more difficult but once going not bad at all with a much higher speed

And as you know yourself when fully loaded and going up hill you need to change down

So clearly you mustn't overdo the rear axle ratio otherwise you'll end up burning your clutch out trying to pull away on a hill with a fully laden vehicle

I know what you would like and we're all the same
A much more powerful engine and a couple of extra gears on the gearbox
Maybe you should be looking at the Transit 135T350 with it's 6 speed gearbox and good payload, not to mention that it s rear wheel drive

PS. Ive just read you want to fit tints The laws have recently changed so you may want to look for the thread on this subject as well

[Weegee]

this van i have is rear wheel drive is it not

Perhaps if i explain a bit more about how i use my van it will help.

I dont drive my van on a daily basis, although i am in it every day. When i start a shift, i drive from my house in south wales to wherever i am working at that time, which in the case of early next year will be aberdeen area. Once i am on site, the van rarely moves at all - mabey a 5 minute jolt down to the petrol station to get petrol for my generator, and that only happens mabey once a week. after a few weeks, i then head home again for a few days, (during which i drive my mondeo- unless were going shopping), and then its back in the van and back onto a site.

So in broad terms, i believe that a higher top speed would be of more use to me, as what i need is to get to and from my sites as quickly as possible. I understand that you either have one or the other.

Although i carry a large amount of weight as water, batteries ect, i do think that i possibley carry a lot less than a lot of transit owners, as apart from the living stuff i dont have anything between the rear of the drivers seat and 70cm away from the back door, this is all open space and nothing ever goes there. I dont have fitted units or wardrobes or anything like that to add to the weight.

Hence i dont reacon that i will need loads of low down power to get rolling, and im on motorway 95% of the time im out on the road.

Can you suggest a different axel, or is the one suggested above the best candidate for a vehicle used as this.

Thanks

Weegee

[AndyG]

Yep Your van is rear wheel drive
And the suggested axle would be your best bet
You will also have to recalibrate your speedo in the way of changing the speedometer drive at the gearbox end

Also bear in mind that the turbo Transit has a "low blow" turbo, that's why we don't have any surges of power (we wish )

[Weegee]

I shall drop in an electronic speedo, as i will probably find that easier, I have LOTS of spare time, so i make electronic speedo's for the mondeos, im sure it cant be all that different behind there, compared to say a diesel mondeo.

Sorry to be a pest, but :

fuel pressure up + more compressed air = vroom vroom

or bang, bang

[100ps_drw_hicube]

Also bear in mind that the turbo Transit has a "low blow" turbo, that's why we don't have any surges of power (we wish )

so what would anyone say on fitting a high blow turbo maybe this is where extra power lies

[AndyG]

Vroom Vroom mate
But don't overdo it, or it could

But you'll soon know when you drive it If it 's going too well, you'll have to back off a bit

Some people will thrash it to death within a few minutes It really depends on the operator most of the time

Looking at your van, it seems as though you already have an electronic speedo Unfortunately some have been succsessful and others not at converting to the mondeo style rev cuonter version So good luck with that
Be aware that Transits did officially have the rev counter option but few wanted to pay the £50 to have it "It's only a van" comes to mind

[rover]

I think you would get away with your supercahrger, just not at full tilt!, the pump you have will allow for slightly more fuellig by the pump tweak that has been covered in other threads, so if you go for the larger pulley giving less pressure than a small one you should get away with it.

The only thing you have to watch out for is at M.O.T time when your emmisions may be out of range.

Rover.

[AndyG]

Also bear in mind that the turbo Transit has a "low blow" turbo, that's why we don't have any surges of power (we wish )

so what would anyone say on fitting a high blow turbo maybe this is where extra power lies

Oi Less of that from you You'll need to stock some engines in your shed

Your Lucas could be hunting because someone has already been fiddling with your turbo

Remember someone on here fitted an intercooler on their turbo and upset their Lucas the same way (hunting)

[100ps_drw_hicube]

mate my lucass has been hunting since i had the van but since adjusting the wastegate it doesnt hunt as much

[Weegee]

I was thinking more electronic/electronic speedo and revs, rather than electromechanical. I love my gadgets me







Imagine all of them together. The white plastic moulding is where im stuck at the moment, i have the easy cure plastic, but i need to make up a mould first, and i havnt been able to get to the machine shop for a while.

In the meantime i will probably just tart up the dial a bit, the same as my car - this one is matrix code running down the dial.