[sp33d_f|[email protected]]

Hi, I'm the owner of a black 1996 850R wagon, and I'm thinking about putting in a second turbo, running in series with the stock one. A friend of mine pulled something similar with a Porsche, brought the compression up to some insane figures, and his car HAULS. I was leaning towards a second high-pressure Volvo one, any advice?

P.S. - The gray plastic on the trim strips has all cracked off, and it looks horrible. Is anyone else having this problem??

 

[Spearzy]

quote:

Originally posted by sp33d_f|[email protected]:
Hi, I'm the owner of a black 1996 850R wagon, and I'm thinking about putting in a second turbo, running in series with the stock one. A friend of mine pulled something similar with a Porsche, brought the compression up to some insane figures, and his car HAULS. I was leaning towards a second high-pressure Volvo one, any advice?

P.S. - The gray plastic on the trim strips has all cracked off, and it looks horrible. Is anyone else having this problem??

That sounds awesome if that can be done. I would look into getting stronger connecting rods, maybe ceramic plating and such first so the engine can handle the extra stress and internal temperatures. Probably more you would have to do to maintain reliability. My understanding of twin turbos is one turbo works harder at lower RPMs and the other kicks in with brute force at higher RPM. Turbo lag becomes a thing of the past and dyno readings blow minds. I am kind of thinking of cars like the Supra TT, 300ZX TT or the Skyline R34 GTR, but these are all inline motors with mean turbos put on too. Often resulting in 600+ hp when pushed hard. That would be the coolest Volvo ever with TT

As far as the trim problem my 850 is a '96 as well and the trim is still perfect. I regularly put on the tire black on the trim to keep it kinda wet and new looking. I find it works better than all those plastic/vinyl cleaners and is cheap and easy. My door handles are fairly sun faded and this little procedure makes them look good agian and seems to prevent further fading as far as I can tell.

 

[steve s]

agreed...internals need strengthening b4 anything over 300hp can be done..look up tme.com for some info

 

[towerymt]

The only reason to run 2 turbos on an odd number of cylinders is to have one small and one large. Is it really necessary? How much power do you want and how much do you want to spend? I think you could do better with a ball bearing turbo that will spool up faster and still provide plenty of boost.

 

[devalmyth]

hmmmm twin turbo, could you find the room or the money? i would look eles were b 4 putting a second turbo..

michael.

 

[steve s]

there are some really fast spooling turbos that will give u a broad power band and low end punch. stuff like ball bearing turbos, and titanium turbos...

 

[ChrisNylen]

Would that even be possible? Dont you need a car with 2 sets of headers? Like on a V engine?

 

[Spearzy]

quote:

Originally posted by ChrisNylen:
Would that even be possible? Dont you need a car with 2 sets of headers? Like on a V engine?

No, the cars I mentioned earlier that are twin turbo are all straight six's. Not V configuration. I'm not an expert on the subject but I can't really think of any factory twin turbo V style motors...

 

[Kai]

quote:

Originally posted by Spearzy:
No, the cars I mentioned earlier that are twin turbo are all straight six's. Not V configuration. I'm not an expert on the subject but I can't really think of any factory twin turbo V style motors...

How about 300ZX, 3000GT(Stealth), Typhoon, Cyclone, and the special F-bird. The 2.7T V6 that Audi has? The V8 twin turbo that Audi and other more exotic cars have? I think the list goes on and on...there are a lot of V configuration twin turbos out there. I'm sure many others on this board can recall more than I can.

 

[Kai]

quote:

Originally posted by Spearzy:
I'm not an expert on the subject but I can't really think of any factory twin turbo V style motors...

How about Flat 6 twin turbo?

 

[Kai]

quote:

Originally posted by Spearzy:
No, the cars I mentioned earlier that are twin turbo are all straight six's.

I thought the Fairlady always had the V config...one of the reasons some didn't like about the engine. I could be wrong...

Yeah, which Maserati had the twin turbo V8? I know Terrence's family has one.

 

[steve s]

porsche 911 turbo is flat-6 twinturbo...definitely flat-6, but likely twinturbo. i think only porsche and subaru use flat-6 or flat-4 (for the latter) engines...

 

[ChrisNylen]

I can see where you're coming from, with the flat 6, but do the flat 6's have 2 sets of headers? How would it be possible to add a 2nd turbo to an 850 if it has an odd number of cylinders and only one set of headers?

 

[Spearzy]

quote:

Originally posted by The_one_n_only:
How about 300ZX, 3000GT(Stealth), Typhoon, Cyclone, and the special F-bird. The 2.7T V6 that Audi has? The V8 twin turbo that Audi and other more exotic cars have? I think the list goes on and on...there are a lot of V configuration twin turbos out there. I'm sure many others on this board can recall more than I can.

I stand corrected!!
Glad I said I'm not an expert on the subject to reduce my jack-ass look answer

I didn't even realize the Z was a V config. design. Hmmm, some really well tuned motors there too.
Well hey, if I learned something that makes me happy.
So do you guys think the twin T idea is feasable? I would love to see a Volvo that pops a flame out the tail when de-accelerating for a corner (ok, I saw a night event BTCC event once on tv once, the image keeps coming back...). Of course the TT should throw more than enough fuel into motor to do anything... drool...

(edit) Is the new Lotus Espit V8 a TT? Never seen one in real life here (or the Skyline for that matter).

 

[Spearzy]

Why would the odd number of cylinders be a factor? The motor is still balance right? Too strange of a firing order? (1-2-4-5-3 I believe)

 

[ChrisNylen]

Well for there to be 2 turbos, you need 2 sources of exhaust, for any turbo for the turbo to spool up, it needs exhaust fumes. So I do not see how this will work if there is only one set of headers. 2 headers would be the way to do this.

 

[devalmyth]

quote:

Originally posted by ChrisNylen:
Well for there to be 2 turbos, you need 2 sources of exhaust, for any turbo for the turbo to spool up, it needs exhaust fumes. So I do not see how this will work if there is only one set of headers. 2 headers would be the way to do this.

the way you do it is have a small turbo and a larger one, the 2 turbos join togeather so the exhaust from the small turbo runs direct into the larger one. this gives a quicker spool up, with the advatage of a broader touque range.

michael.

 

[ChrisNylen]

ohhhh ok, thank for your clearing that up

 

[devalmyth]

there was a twin system turbo made were this type of configeration was done , but it provided too much boost, i5t ws a epermental type system. i had a pic but dont no what happened to i t, i will try to find it.

michael.