 | Home > Maintenance & Modifications > Twin Turbo |
 
|
|
|
| Grenadier Member Since: 23 Jul 2014 Location: The foot of Mont Blanc... Posts: 5839   
|
A question to those in the know (Pete at BAS etc).
Just wandered past an Audi SQ5, sounds lovely and goes like stink. Noticed the bi-turbo badge on the wing and remembred I'd seen a bi-turbo Opel Vivaro just the day before. Quite different vehicles, so as I ate my cheese and ham panini, I wondered if you can (technically) twin/bi-turbo anything? I appreciate there might be a cost/practicality/benefit implication, but I further wondered if the 2.4 could be bi-turboed? If so, what would be the extra BHP versus the cost, assuming that a classic Stage 2 upgrade had already been undertaken (re-map, hoses, intercooler, new VGT and other appropriate mods)? Just wondering, any thoughts?....  Monsieur Le Grenadier
I've not been everywhere, but it's on my list..... 2011 Puma 110DC - Corris Grey |
||
4th Sep 2017 12:02pm |
|
| miker Member Since: 13 Sep 2015 Location: Surrey Posts: 1764  
|
I believe it's mostly done for efficiency reasons. Smaller turbo to deal with the low down grunt, and fill in the power gap until the larger turbo, designs for high rpm power, becomes efficient
|
||
|
4th Sep 2017 12:18pm |
|
| rallysteve Member Since: 10 Feb 2014 Location: Cumbria Posts: 2237 
|
often twin turbos are used on multi-cylinder engines for ease of packaging (e.g. one turbo per banks to avoid the manifolds having to join before the turbo.
More recently, petrol engines in particular, have used twin turbos to reduce the turbo lag effects. A smaller turbo spools quicker for low rpm with a larger turbo to take over at higher revs. This is what is used with quite a few of the BMW 6cyl engines. This is what the idea is with the new Vauxhall BiTurbo CDTi engines. I dont think that the twin turbo idea is particually well suited to larger, long stroke diesels which are generally less free revving than a smaller petrol engine anyway. The simplicity of a VGT would be better suited to this type of engine. Steve 02' 110 TD5 Double Cab Rebuild Thread |
||
|
4th Sep 2017 12:24pm |
|
| bankz5152 Member Since: 02 Feb 2017 Location: South London/North Kent Posts: 2185 
|
There are a few twin turbo TD5s about, I believe Naf on here is doing one. TD5Inside have done a couple too
|
||
|
4th Sep 2017 1:34pm |
|
| zsd-puma Member Since: 09 Aug 2016 Location: Kent Posts: 2720 
|
It depends how the twin turbos are installed.
I think there are two ways of having twin turbos, either one after the other as others have described above, so you have a smaller one then a larger one. But i think you can also have identical turbos side by side, with the exhaust manifold split in a similar manner to an inlet manifold with twin carbs. This method would probably be easier to implement, it means you could have two smaller turbos doing two exhaust ports each, the two smaller turbos would spool up quicker than one large one but provide the same over all boost. I think i read the Veyron or something has one turbo per cylinder. Whether it's worth bothering is another issue, i mean with a remap, intercooler and variable turbo i think you can get over 200bhp out of a Puma or TD5. More than that it's easier to just swap the engine for something bigger, but how much power do you need in a Defender? |
||
|
4th Sep 2017 2:07pm |
|
| Kit Member Since: 12 Feb 2016 Location: Shropshire Posts: 1110 
|
It would be amazing if the veyron did have 1 per cylinder (its a W18 - 18 cylinders)
It's "just" got 4 on its 8.0 engine  1993 200 Tdi 90 CSW
1956 Series 1 Hard-top 1958 Series 1 Soft-top |
||
|
4th Sep 2017 4:03pm |
|
| bpman Member Since: 21 May 2008 Location: Oslo Posts: 8069 
|
hey Kit it's actually a W16 ...
A W16 engine is a sixteen cylinder piston internal combustion engine in a four-bank W configuration. All W16 engines consist of two 'offset double-row' banks of eight cylinders, coupled to a single crankshaft. ... This W16 was later used in the Audi Rosemeyer concept car, and is also used in the Bugatti Veyron. https://www.topgear.com/car-news/chris-har...ypercar#14 |
||
|
4th Sep 2017 4:22pm |
|
| Kit Member Since: 12 Feb 2016 Location: Shropshire Posts: 1110
|
The EB 18.4 Veyron is a W18?
To be honest I typed that quickly on my phone, it was supposed to read: It would be amazing if the veyron did have 1 per cylinder (its original W18 - 18 cylinders) It's "just" got 4 on its 8.0 engine now 1993 200 Tdi 90 CSW
1956 Series 1 Hard-top 1958 Series 1 Soft-top |
||
|
4th Sep 2017 5:31pm |
|
| Pickles Member Since: 26 May 2013 Location: Melbourne Posts: 3786  
|
Anyone can whack a "twin turbo" on any engine they like,...it's easy?
BUT, the difficult thing is, to get such a set up to work, on a vehicle for which it was not designed,....that is if you take the set up from another vehicle, a wreck etc. Even more difficult would be buying twin turbos and trying to "set them up" on your engine,...the electronics, computer tie ups, manifolding, exhaust etc would be a nightmare.....impossible for most people, I'd say. Simply, IMHO, not worth the effort. Pickles. |
||
|
4th Sep 2017 10:25pm |
|
| LR90XS2011 Member Since: 05 Apr 2011 Location: bickenhill Posts: 3645 
|
BMW 123d is twin turbo a few people on here have owned them BP man springs to mind. 206 bhp from a 2 litre in standard form and tune-able to over 300. has a small turbo for low revs and a big one for high revs DEFENDER 90 TDCI XS,
I hope everyone is well and your land rovers make you happy |
||
|
5th Sep 2017 6:15am |
|
| Rosco Member Since: 03 Dec 2010 Location: Burntwood Posts: 1834 
|
The Mercedes C250d is the same as well. Had one for a while and for "only" a 2 litre diesel it went like the proverbial.
My other interest is 80's/90's Fords, especially the Sierra XR models, and back in the day there were quiet a few companies offering "bolt on" turbo kits to fit to the 2.8/2.9 cologne V6. Turbo Technics was probably one of the most successful, especially with the twin turbo kit for the later 2.9's (turbo for each bank). One of the club members has one, and he's had some big numbers on the dyno over the years (500bhp I think at one point) but in reality there's very little left from what Ford built it as. And he also confessed the more he chased the figure, the less drivable the car became. Anything is possible, but what it costs, and how driver/task friendly it is after are another question. 2007 - Stornoway Grey 90 XS SW - Gone 2002 - Black Discovery II - Gone 2014 - Montalcino Red 110 XS SW |
||
|
5th Sep 2017 7:30am |
|
| Pickles Member Since: 26 May 2013 Location: Melbourne Posts: 3786
|
And I also should have said, Try & get a twin turbo set up first of all to work, and secondly, to give any worthwhile results on a 2.4, & I'd be VERY surprised indeed. An engine transplant would be a better way, or of course leaving the 2.4 in, go & speak to Pete Bell for a worthwhile tune etc. Pickles. |
||
|
5th Sep 2017 7:49am |
|
| L110CDL Member Since: 31 Oct 2015 Location: Devon Posts: 10801 
|
Rosco, you would of liked my MK2 P100 pick up, it had a V6 2.8 with a turbo pushing 224 BHP everything else on it was standard, awesome machine
Can agree with the Twin turbo's as our Vauxhall Signum V6 2.8 twin turbo pushed out 250 BHP and had no turbo lag what so ever, very nice  1996 Golf Blue 300Tdi 110 Pick up.
Keeper. Clayton. |
||
|
6th Sep 2017 9:44pm |
|
| Rosco Member Since: 03 Dec 2010 Location: Burntwood Posts: 1834
|
Clayton, P100 was a great pick up in its day and I've seen some great (and equally some hideous) customised ones.
Sharing common parts with the Sierra no doubt helped 2007 - Stornoway Grey 90 XS SW - Gone
2002 - Black Discovery II - Gone 2014 - Montalcino Red 110 XS SW |
||
|
7th Sep 2017 7:42am |
|
|
|
| All times are GMT |
< Previous Topic | Next Topic > |
Posting Rules
|
Site Copyright © 2006-2025 Futuranet Ltd & Martin Lewis
