Badger · Dec 20, 2011

Having a moment, bear with me.

Other than the making up of the manifold, what's stopping putting a second turbo on a 200tdi?

I'm not looking for speed, performance etc, just interested in why it couldn't be done...if it couldn't be done.

The engines are built like tanks anyway, given how mine has been for the past year or so, it should technically have told me to fook orf and stop working some time ago, but it still plodded on. With the new lump in there it is much smoother and has a little more power, but it's a landy so i'm not interested in doing 100mph.

I like a challenge though, something different.

Manifold remoulded ( somehow )
Split oil feed to both turbos, returns the same
Intercooler...larger?
Intake manifold adjusted for twin intakes.

Soo am i bonkers for the idea?

Station House · Dec 20, 2011

Don't know Paul, but if the engine struggles with the existing turbo boosted much above 1.2 bar, wouldn't two turbos kill it?

As i say don't know and wouldn't want to **** on your parade - just my first thoguht 1 bottle of wine into the evening

andlover · Dec 20, 2011

why do have to make intakemanifold with two intakes? i fink if you make it this way: 1 turbo blows in other turbo and make a wonderfull low torgue?

wiltshire landyman · Dec 20, 2011

i think youve had an episode or did matron forget your medicene

focus your time/attention on summit else,if it was needed or proved invaluable an was a straight forward mod and wouldnt fcuk anything else up do you not think it would have been done by now?

youve already said you dont want to improve speed/performance so why else would you need an extra turbo?

Karlos28 · Dec 20, 2011

you can do anything with the right amount of money..!

andlover · Dec 20, 2011

my friend has twinturbo vw mk4 4.motion and vw passat 4 motion...it goes like hell. but he has remapping shop and all the tools etc.

if you just do a hybrid turbo? with one? that kind turbo witch "wakes" very early? lot of boost with low rews? my disco is so dead with low revs vs. 19j series 3 with intercooler that i have made up.

wiltshire landyman · Dec 20, 2011

andlover said:
my friend has twinturbo vw mk4 4.motion and vw passat 4 motion...it goes like hell. but he has remapping shop and all the tools etc.

if you just do a hybrid turbo? with one? that kind turbo witch "wakes" very early? lot of boost with low rews? my disco is so dead with low revs vs. 19j series 3 with intercooler that i have made up.

bit different to a 200 tdi brick on wheels then

Karlos28 · Dec 20, 2011

a guy i know is just finishing a twin turbo lexus v8 vauxhall viva!

andlover · Dec 20, 2011

:biggrin1: brick on wheels

Shifty1962 · Dec 20, 2011

You wont have enough exhaust flow to spin two standard turbos properly. Most twin turbo installs are on V engines or they use a large and small turbo on the same manifold to limit turbo lag. But if you fancy having a go why not.

discomikey · Dec 20, 2011

parallel or in line?
both would work. paralells probably easier to make up, but i reckon you would need at least 3" bore exhaust and a decent cooler. the good news is that neither turbo would need to overcook itself.

plus you get the added benefit of that extra boost guage. (possibly 3 if you have turbo pressures and manifold pressure) mmmmmmm :5bhurray::5bhurray:

and as a great man once said (mark evans) guages must always come in odd numbers

rappy1 · Dec 21, 2011

i wouldn't fart about with twin turbos. Most people try going the other way and converting vehicles to single turbo. If i was you i would just buy a better turbo. Some fancy ones out there. Even the transit has variable vanes on it turbo now

Badger · Dec 21, 2011

I was thinking parallel, 1 working of pots 1 & 4 and 1 working off pots 2 & 3, however would that cause upset in the running? I can't see how as your still gaining the boost, instead of one working off the whole exhaust stroke, you have 2 working off each pair of pistons on their exhaust stroke, you'd then have to split the intake to each set of pistons as well to gain a balance.

It's just an idea, as i have no idea how to remake the manifolds ( intake easier ), but i have a few manifolds kicking around so might just get the grinder out next week....

Badger · Dec 21, 2011

andlover said:
why do have to make intakemanifold with two intakes? i fink if you make it this way: 1 turbo blows in other turbo and make a wonderfull low torgue?

So would that give more torque over the rev range, ie the main turbo kicks earlier as it's being ' boosted ' by the other?

wiltshire landyman said:
i think youve had an episode or did matron forget your medicene

focus your time/attention on summit else,if it was needed or proved invaluable an was a straight forward mod and wouldnt fcuk anything else up do you not think it would have been done by now?

youve already said you dont want to improve speed/performance so why else would you need an extra turbo?

It's just an idea, never seen it done, so why not be the first?

Shifty1962 said:
You wont have enough exhaust flow to spin two standard turbos properly. Most twin turbo installs are on V engines or they use a large and small turbo on the same manifold to limit turbo lag. But if you fancy having a go why not.

Smaller turbos would be better then, i need to look into size relationships to engine size etc.

discomikey said:
parallel or in line?
both would work. paralells probably easier to make up, but i reckon you would need at least 3" bore exhaust and a decent cooler. the good news is that neither turbo would need to overcook itself.

plus you get the added benefit of that extra boost guage. (possibly 3 if you have turbo pressures and manifold pressure) mmmmmmm :5bhurray::5bhurray:

and as a great man once said (mark evans) guages must always come in odd numbers

Parallel would be better, in line will give me more torque over the range though?

Badger · Dec 21, 2011

Defender Biturbo Diesel

Already been done, so it's possible

tacr2man · Dec 21, 2011

Might be better with turbo/supercharger ?

discomikey · Dec 21, 2011

i suppose you could make it up so that the big turbo exhausts into the little one, but you would need to make sure that the little turbo has the wastegate set up right, i.e. fully open when big turbo is boosting, otherwise youll restrict the flow and it wont be any better than one turbo.

just imagine watching the 3 guages though...

low revs, one guage shoots up to 18psi, then as revs increase, it slowly drops whilst the other guage climbs to 18, and the inlet manifold boost pressure would more or less constantly stay at 18psi.

Badger · Dec 21, 2011

Could you not have the little one fully open all the time?

discomikey · Dec 21, 2011

open ewastegate open = turbo bypassed exhaust side, so no you wouldnt want it.
depending on the exhaust setup, you might get away with not fully opening the wastegate, so long as the exhaust from the smaller one wont restrict the larger one.

4x4tom · Dec 21, 2011

Id say you were better off putting your efforts into a vnt turbo setup...

Well-Known Member

Well-Known Member

New Member

I’m back

Well-Known Member

New Member

I’m back

Well-Known Member

New Member

Well-Known Member

New Member

Active Member

Well-Known Member

Well-Known Member

Well-Known Member

Well-Known Member

Attachments

New Member

Well-Known Member

New Member

Active Member

Similar threads