The new 335i on the dyno! (vid too!)

[Bimmerfanatik]

i'm on what i like to call beer number three...

lol - I need a beer.

[Brew]

As for "bi-turbo" versus "twin-turbo" I'd like to see some form of proof that bi-turbo is reserved solely for sequential setups, and twin reserved for v-based engines with seperate cylinder banks.

Bi-turbo usually refers to two equal-sized on two separate banks. Which is the what the 335i uses--cylinders 1-3 and 4-6 have separate manifolds and turbos.
Mercedes uses the "bi-turbo" designation for their FI V12 motors. Then again, Porsche uses "twin-turbo" for their flat six motors, with equal-sized turbos.

[Bimmerfanatik]

Bi-turbo usually refers to two equal-sized on two separate banks. Which is the what the 335i uses--cylinders 1-3 and 4-6 have separate manifolds and turbos.
Mercedes uses the "bi-turbo" designation for their FI V12 motors. Then again, Porsche uses "twin-turbo" for their flat six motors, with equal-sized turbos.

So Merc uses "bi-turbo" on non-sequential setups - that's what I thought :)

I'm gonna go snail power soon...mmm.

[AndrewBird]

I thought twin-turbo is where both turboes feed into the intake where as with a bi-turbo, one turbo feeds into the other turbo, which then feeds into the intake.

I've never heard of someone using two different size turbos before. Seems kind of weird. Although I have heard of superchargers that ran off of oil pressure...

[Kman]

Well, I ask because I remember when the Audi RS6 came out, it was always referred to as a "Bi-turbo V8".

oh man rs6, i drove one once, there sick, but it was only at crystal cove (solca) out and then around. but yea i belive all audi's or atleast most oh them have biturbos. dunno the diffenerence i thought they were the same

[b*saint]

The difference between twin and bi turbo is the same as the difference between mac and cheese and macaroni and cheese. Nothing.

[silversleeper]

I have a friend that recently bought a barely used 04 M3... He considered the 335i, but figured it was too tame in comparison to the M3, and the M3 has long been his dream car. He spent roughly $50k on a 04 M3 6 spd vert with <5k miles. You think the 335i brand new would've been a better buy?


I think the 335i just busted a nut all over the E46 M3. I think I soiled myself watching that dyno.

[ldsbeaker]

Very nice to say the least.... I wonder what the warranty service will be like....

[JRowe]

I would like to have seen BMW go with VVT using just one turbo to eliminate the lag rather than twin turbo. (or at least I'd like to know why they didn't). VVT= variable vane technology. Basically, the vanes in the turbo change their angle to, in effect, change the size of the turbo through the rpm range. Porsche recently went to this and turbo lag is essentially non existant.

[Jand3rson]

I thought twin-turbo is where both turboes feed into the intake where as with a bi-turbo, one turbo feeds into the other turbo, which then feeds into the intake.

This is what I understood.

I've never heard of someone using two different size turbos before. Seems kind of weird. Although I have heard of superchargers that ran off of oil pressure...

Say WHAT???

[b*saint]

[quote=Eurospeed]This is what I understood.

[quote]

No. That would be some serious turbo lag. Bi turbo and twin turbo means there is two turbos that either spool together or one small one that spools quicker while the bigger one is spooling up. Think 1jz-gte vs 2jz-gte.

[DEV0 E30]

Very nice to say the least.... I wonder what the warranty service will be like....

Service Clerk - " You turned up the boost didn't you? "
Owner - " You aren't supposed to? "

Those things are gonna be awesome, will be awhile before I drive one though I bet. I wonder what sort of power you can get from the stock turbos alone.