1500cc Singleport pushing a 1303 AT Box

DubBGood2Me · Feb 11, 2016

I was going to put my spare 1303 S box up for sale as I've got a filthy diesel and 5 speed box to put in the crewie. But I aint going to get this done for the show season so was planning on using the existing 1500 singleport and bus box. Then I thought about using the 1303 box.

The question is will a 1500 singleport have enough oomph to push the taller gearing?

megaaircooledvw · Feb 11, 2016

Yes it will.

*Sam* · Feb 11, 2016

You might find it gets a bit warm on the motorway.

Tofufi · Feb 12, 2016

I'd reckon it'd be a bit slow on the hills.

I've got a 5 speed with a similar top gear ratio to an AT box, and with a twin-carb 1600 it only just has enough oomph on the motorway. And I've got a 4th gear similar to the standard bay 'box to go back to, which the Beetle box doesn't...

Alex VW Heritage · Feb 12, 2016

You will struggle with Hill's and also in the gap between 3rd and 4th,

You will be ragging 3rd gear and pull into 4th and it will be labouring.

I would not recommend it, your putting the box and engine under excessive load.

Trikky2 · Feb 12, 2016

What wheels and tyres will you be using on the rear wheels?

megaaircooledvw · Feb 12, 2016

Trikky2 said:
What wheels and tyres will you be using on the rear wheels?

Spot on that is the key.

DubBGood2Me · Feb 12, 2016

Trikky2 said:
What wheels and tyres will you be using on the rear wheels?

I'll be running 15" teledials but the rears need new tyres so can change them to suit needs.

Trikky2 · Feb 12, 2016

If you use one of the many online tyre size calculators you may be able to mitigate the over gearing of a beetle box on a 1600 engined t2. (By using smaller wheel/tyre combination).

Alternatively you will need a more powerful engine or be prepared to spend a lot of time in third gear I think.

1500cc Singleport pushing a 1303 AT Box

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