Carb problem

Post by **jaymo** » 03 Feb 2007, 22:58

Hi guys.

I have a 1989 T25 with a MK3 Golf GTI engine fitted, but the engine has been tilted over approx 40 degrees in order to make it fit. The problem I have, is the float in the carb doesn't operate properly because of its angled position, and ideally needs to be upright. Can anybody suggest a way around this problem without the need of fitting a different engine?

Any advice would be much appreciated.

Jaymo.

Post by **Simon Baxter** » 03 Feb 2007, 23:24

MKIII Golfs were all injection models.

The name gtI should give it away, as being INJECTION.

If it does have a carb it will be from a MKI or MKII and NOT a GTI.

If it really does have a carb then you need to make a wedge shaped spacer to put under the carb.

Post by **HarryMann** » 03 Feb 2007, 23:33

.. and that is easier said than done

depending how its bolted on.

and the angle might be more like 50 degrees, yes?

Tufnol would be a good material, LFS, Laminated Fibre Strip, sheet.
http://wiki.80-90.co.uk/index.php/General_LFS
You'd need a fairly thick block to start, and some good skills in drilling, filing and accurately flatting surfaces.

Post by **jaymo** » 04 Feb 2007, 19:59

Yeah, I guess the angle is more like 50 degrees, and I was thinking along the lines of making a wedge shape manifold to bring the carb upright, but thought I may have to get something specifically cast which I imagine would be quite costly?

I think I'll give the tufnol a go, sounds like a good solution to me, depending on how its bolted on of course, need to have a good look.

Many thanks.

Post by **jaymo** » 04 Feb 2007, 20:09

I suppose I should ask where I could find Tufnol block or LFS?

Thanks again.

Post by **HarryMann** » 04 Feb 2007, 20:51

Tufnol composites, Perry Barr, Brum

Worth a try, ask for some scraps ? Lookin their bins

Most grades will stand up to the temps and act as a good insulator between carb and manifold... if it needs carb heat, then find another way (hot air inlet for winter)

This'll take you some time to make one up well, but hey, its wintre and all you need is a shed, a vice, some hole cutters (appropriate to carb bore) some drill some araldite (or ask Tufnol, about best cold-set glue), accurate marking out, some rotary burrs, some 60 or 80 grade paper, and some skillz...

Work out the size for the two flanges, use about 1/4"~5/16" thick for them, make them up, then with 3 or 4 other smaller pieces, build up a stack.
For each wedge:

1) Make the main hole
2) Hacksaw accurately edgewise into wedges, flat off accurately on a flat plate (like the Wiki on Tools and Techniques says, but with 60 or 80 grade, finishing with 120 maybe> surfacing/finding flatness

Clamp & stick them together accurately, one at a time possibly best, could key them together with 1/16" holes and int fit fpins or 1/8"(3mm) c/sunk pop rivets maybe.

until you are about 50 degrees around, then add the other carb mating flange (which will be wider than the main blocks, for studs/bolts)

Either smooth the internal bore as you go or when its finished, with rotary burr (careful dareful) or by hand with 40/60 or 80 grade)

Should keep you out the pub for a fortnight of Sundays