1.9 DG to 2.1 DJ, what should I do???

Post by **coilspring** » 28 Mar 2008, 16:02

Ian, The water pump and all fittings are still with the 2.1 so will these just fit up to the existing DG cooling sytem pipework? Nice one....

Post by **Mocki** » 28 Mar 2008, 16:05

argh, well, thats the fun bit, coz unless the 2.1 came from a van the same age as yours, you need to either change your van to fit the engine, or change the engine to fit the van, coz 83 is a early, it has the early water sys...... i changed the engine to fit the van, coz i had the bits....... its almost deffo cheaper to change the van engine bay to fit the engine, water wise......

Post by **toomanytoys** » 28 Mar 2008, 18:31

and the later system will help to keep the no1 head cool too.. and you can keep the oil cooler/warmer

Post by **Ian Hulley** » 28 Mar 2008, 18:45

Didn't re-jet our carb, emission at pre-MOT was non-existant and there's plenty of power there

.

As Mocki say's in an ideal situation you'd swap the water system to a late set-up, Paul (Shepster) retained his early system ..... you'd have to ask him how he plumbed up the oil warmer/cooler.

While the engine's out you may like to assess the exhaust, or even take it off and replace the fasteners, if it's not been off for a while .... MUCH easier to replace those broken studs and rounded off bolts on a bench than laid on your back. Check everything you can thoroughly.

Is the donor a manual or auto ? ... If it's auto you have the pinion bearing to install, a flywheel to buy (£200 less £80 for a worn one from VW) PLUS the issue of the size of the clutch, 2.1 is 228mm like the late 1.9.

See, not totally simple

Good luck, Ian.

Post by **Mocki** » 28 Mar 2008, 21:34

no need to rejet, it works just fine......

Post by **jason k** » 29 Mar 2008, 00:33

cant see how really, bigger motor and no more fuel??
run lean and you run the risk of damage. surely its worth 80 quid on a roller to set it up properly??

Post by **Mocki** » 29 Mar 2008, 08:58

you have too much money!

Post by **Ian Hulley** » 29 Mar 2008, 10:59

jason k wrote:cant see how really, bigger motor and no more fuel??
run lean and you run the risk of damage. surely its worth 80 quid on a roller to set it up properly??

Sorry Jason, do you have a 2.1 with a DG carb ? Quite a few on here have... and seem to have done so for years.

Ian.

Post by **Microbusman** » 29 Mar 2008, 16:47

Dont do it, unless you have got your own private oil well

Post by **jason k** » 29 Mar 2008, 17:40

Ian Hulley wrote:
jason k wrote:cant see how really, bigger motor and no more fuel??
run lean and you run the risk of damage. surely its worth 80 quid on a roller to set it up properly??

Sorry Jason, do you have a 2.1 with a DG carb ? Quite a few on here have... and seem to have done so for years.

Ian.

sorry no i dont ian but i have had experience with changing carbs on different engine applications and they always need a tweak on the jets.
im not made of money but 80 quid is a lot cheaper than burnt valves or holed pistons from an excessive lean situation mocki!!!
im sure some of you have had no probs but it worries me as you say ian emmisions at mot almost non existant, you gotta be running too lean, if set right you should be producing some co. unless you have a cat.
im not trying to offend anyone here, im just offering my experience, up to you if take notice

from the wiki......
https://club8090.co.uk/wiki/Fu ... -_Pierburg

Post by **Laurie** » 29 Mar 2008, 18:06

If ever I build a 2.1 to run on carb, I either use MV pistons or reduce the compression by machining. Using LPG is a good idea, but I still advise a flash lube system, having seen a LOT of engines recess valves.
I've also seen a number of DJ engines, running high compression with horrible burns on the tops of pistons and even in the ally of the head.

If you really want to see one go, MV barrels and pistons, Scat C35 with solid lifters, twin 40 DRLA fitted on type 3 inlet manifolds.

If you worry about the cooling, using the old water system, fit an electric pump from a diesel engine and a little rad for the cooler.

Trust me, I'm and aromatherapist!

Post by **T'Onion** » 29 Mar 2008, 18:11

Trust me, I'm and aromatherapist!

Post by **shepster** » 31 Mar 2008, 11:36

Only just seen this so for what it's worth this is what i've done up to yet, bearing in mind the Engine i used was driven in the van by me and had recently been re-conned so i was pretty happy with the internals.

Early 1.9dg out and keeping the old water system, changed the oil pump, water pump, fuel pump crank oil seal and any other gaskets/seals i could get at.

Kept the 2.1 Dizzy and used my original carb as i was on LPG as well as the 1.9 pully.

I have also fitted a remote mounted oil pressure gauge in order to keep a close eye on things and also because the early vans have only One sensor.

As of yet things are going pretty well with both oil pressure and Engine temp being as they should (although i realise we are still in March and things will be different in the height of Summer) but the difference in power is really quite vast especially pulling up hills.

I am currently looking at a way to plumb in the oil cooler ready for summer and if i manage it i will let you know.

By the way i kept the old style exhaust system too which seems to work well.

Post by **coilspring** » 01 Apr 2008, 12:04

Righto, thanks for the info guys. Not quite as straightforward as I'd first thought but i do like a challenge! I'll let you know how I get on, might MOT it first with the DG engine but not sure yet. Putting roof on new garage this weekend so as soon as thats done it's dance of the engines time....

Post by **toomanytoys** » 02 Apr 2008, 17:07

Same carb bigger engine.. if anything they prob run a little rich... as the bigger depression (vacuum) in the manifold will suck more fuel out.. CO should be readjusted.. and adjustment only effects idle..

Make sure the carb has been rebiult before going on the rolling road and let us know the results...

Club 80-90 Forums

1.9 DG to 2.1 DJ, what should I do???

Re: 1.9 DG to 2.1 DJ, what should I do???