Tt E60 M5

[Stix Zadinia]

wow, are they HRE wheels still in one peice?

[The Pupat]

not if you have the small turbo's going as per normal (cept with a 1way bypass valve) and the big turbo can just come on whenever it feels like it.

Not sure why the 5miles of pipe matters? the lag is (relatively) gone, and in my example cost is not an issue

If cost weren't an issue why not mount the big one in the engine bay off a nice short manifold and have it feed a 12-71

[lotec]

If cost weren't an issue why not mount the big one in the engine bay off a nice short manifold and have it feed a 12-71

cuz the guy in my example wants to do it this way

i'm not saying it would be the easiest option, but mechaincally speaking, it would work right?

[The Pupat]

cuz the guy in my example wants to do it this way

i'm not saying it would be the easiest option, but mechaincally speaking, it would work right?

Carbies work.... doesn't make them good

[floody]

Turbos look like crusty old T3s or something?

[lotec]

Carbies work.... doesn't make them good

what i'm asking is, how could this not be good?

i'm sure there are better things out there, but is there a reason why this wouldn't lay down some serious serious horsies (engine/fuel..etc permitting) without crazy lag?

[CussCuss]

i have no doubt it would be laggier but how much laggier is the question.

If you size down on the turbos slightly then you should be able to compensate for that lag.

How fast does exhaust gas flow, etc....

[GHaST]

Dont have to...the whole reason you shorten the inlet tract as much as possible is to get better response.

If this was so awesome then race cars would run 20 metres of pipe all over the car just to make the inlet tract as long as possible...rather than doing the opposite.

If you dont understand this then there probably isnt much chance of anyone explaining it to you.

I understand this totally.
however the cost is probably at least 1/2 of a normal conversion - but without comparison, we can all just say "yeah that sux, and wont be as good". would that money be better spent, on say 30" chromies

pop the bonnet with a rear mount, and its like "what turbo officer"

[someone]

Ditch the rear mounted turbos and the shiny wheels and it would suffice for a tow car........

[govich]

however the cost is probably at least 1/2 of a normal conversion

Why? They have to custom make 5+ metres of piping per turbo, including lots of nice bends which fast flowing air loves negotiating, get oil/water lines to the turbos (separate reservoirs/pumps? $$) etc. Am i missing something?

[fly510]

I saw a VX SS at the summernats with this setup with the mandatory meatheads crawling all over it in the traders pavilion. I just kept asking myself why and couldn't come up with one good reason as surely theres enough room in the engine bay for one if not two turbos.

Too be honest its like something an american would do.

[koppers]

That's some real quality pipework.

[GHaST]

Why? They have to custom make 5+ metres of piping per turbo, including lots of nice bends which fast flowing air loves negotiating, get oil/water lines to the turbos (separate reservoirs/pumps? $$) etc. Am i missing something?

Got a point there. it may be cheaper to do this piping (as apposed to manifold) - but there is a lot of it to make up for it.

[Babalouie]

i have no doubt it would be laggier but how much laggier is the question.

If you size down on the turbos slightly then you should be able to compensate for that lag.

How fast does exhaust gas flow, etc....

That show on Foxtel, Two Guys Garage, did an install of one of those under-boot turbos on an F-Body Camaro. It was a bloody quick install, basically you drop the muffler, then the turbo and associated plumbing just bolts on in its place, using the stock hangers and all.

Power went from 260 to 390hp at the wheels (on a Yank dyno, mind) and they went to some pains to point out that full boost came on by 2000rpm and lag wasn't an issue.

[govich]

they went to some pains to point out that full boost came on by 2000rpm and lag wasn't an issue.

I'd love to see what they come up with if asked to do a comparison of response with the same engine/car and the turbo in the engine bay. It's like running a rear mounted T25 fed by an LS2 and prancing around boasting full boost at 1500rpm, in an attempt to prove that there is no noticeable lag introduced by adding 5x the amount of piping and bends.