Something I stumbled on while googling around; A ver compact twin turbo LNF set-up:

 

Somebody left their allen wrenches on top of it lol.. so, what other info do you have? Or, just felt like sharing a pic of a stock engine?

 

^ stock? did you even look at that pic?

Op gotta come with more info a link sumptin

 

No idea on the power that makes or if it even runs, but it is an LNF engine fitted with a modified Saab bi-turbo set-up:

 

Twin Turbo on a 4 cylinder car is like putting a rocket pack on an ant, it's a cool idea until everything it was supposed to do went wrong...

 

Some weird Swedish science lab: Division of Vehicular Systems, Lab

It says there max power was decreased due to turbo size (it probably spools on idle...), but thought it was a compact layout and maybe it inspires someone over here. (Or use some of those saab parts)

 

Yea lol I see all stock parts, open your eyes my son hahaha. Modified saab b - turbo system is essentially stock.. pretty cool but not necessary. If it were a big 4 cylinder maybe, like the 2.6 in my conquest.... meh. Irdc, it's bed time.

 

That doesn't sound all that practical.

 

I can see your point in here:

 

Thought you meant stock cobalt pic

I don't understand how they ran a sequential setup and made less than 260@ the crank

 

Just read the quote it'll sink in. If you do not have the displacement twin turbo's is pointless. If you have a solid single bank exhaust it behooves you greatly to keep to just one tract. By having two you pull away from power to put it somewhere else. This is not legitimately feesible even with like a carbon fiber wiring system I don't think you'd get far.

 

If I had a rwd car I wouldnt mind a bi turbo set up, I don't like waiting till 5k rpms. But in a fwd car with tons of traction issues already a 3k rpm full spool would be horrible.

 

This is a Twin Turbo set up from a Saab 1.9 diesel. I looked in to it at one point but the header flow was very restrictively low and BW engineer I talked to was concerned about handling the exhaust temps from a turbo gas motor.

And getting the plumbing right would be a nighmare.

--Christian

 

This is always why I thought twin turbos on inline 4's were weird. It seemed like a hassle with one exhaust bank. The potential benefits don't seem to outweigh the complication of doing this. I wondered if it was even possible to get consistent spools with two equally sized turbos, and if you wanted the "one small one big" concept it seems like once the small hits max and starts waste gating it would be a huge waste to the larger turbo.

I dont know if any of that is true its just what I thought what might happen.

On a exhaust bank note, everytime I see 4 exhaust tips for an inline 4 I get annoyed lol. Or any inline anything for that matter, or any single turbo car, etc. All I see is "wasted weight and money"

 

Lipstick/sky888 seams to think a 2.0 is enough displacement To make 800hp on a compound setup even though he is using much larger turbos and I dont think its exactly running yet plus If I remember right his exhaust mani is a lot different than this one, having said all that this goes way over my head cool to see sumtin new tho

 

pretty cool idea but needs a bigger turbo lol. a buddy of mine is doing a compound turbo setup on his speed6 forget the sizes he is going with but its gonna put some good power down for sure.

 

What if you made 2 completely separate exhaust manifolds? Two exhaust ports would feed each of the smaller turbos. This would eliminate the turbos fighting each other. Then on the charge side, there will be a y-pipe merging the charged air. Then, it's off to the inner cooler, then into the intake. Wouldn't the 2 smaller turbos almost eliminate turbo lag? On the exhaust side, the pipes would also be merged via y-pipe and then off to the muffler.

 

Isn't there a guy doing a lnf Compound turbo solstice

 

Yes

 

well then who cares about ops post . lol jk

 

Hes doing a serial compound setup. so all 4 exhaust ports feed a smaller turbo (k04 size) then the exhaust gas feeds to a big turbo. As the small turbo spools the exhaust gas back pressure increases to spool the large turbo.


That saab setup looks like 4 ports of exhaust feed to both turbos equally which in a sense takes away from the spooling power. If you made one those turbos a big one. I guarantee it would barely spool if at all.

 

I am telling you this is a rocket pack on an ant, you'd be far better off putting a larger Whipple type supercharger, or the Turbo kits. At no point does the plumbing, tuning, extreme heat, and unholy mechainical failure risk due to so many added key essential parts make this effort worth pushing for more than to be a project demo.

There may be people doing it, and good on them, but practicality is very low, especially when this car can't launch hard it nearly defeats the idea. Remember we have 50% boost in 1st stock, why in the world do we need a twin setup to do what a ECU retune will do, or if your really trying to just smoke the tires go to a NHRA meet and get in the burnout contest and go for broke.

 

Is the guy that has been "working" on putting a big whipple on an lsj for a couple years now really talking about practicality? ??
No its not practicle neither is the whipple idea but both are out of the box and cool to see stuff being tried on a platform that gets sooo little r&d love from the aftermarket

 

Looks like they need to hire a better welder.

 

Lol didn't even notice that. That is a mess.