[e.n335]

Guess, you could develop a bi-turbo upgrade for the 335i.

Master conditions:

- Garrett
- twin turbo setup
- small unit size
- 350-550hp
- ball bearing
- oil-and watercooled
- high efficency
- ceramic coated ( optional )

Which turbos would you coose ?

http://www.turbobygarrett.com/turbob...ers.html#small

[Vince@ V K Motorwerks]

I would get the GT35 turbo however, dont think they would fit in the stock location and Fuel and transmission durablity would be my first concerns

[hotrod2448]

I'd probably go with something from the Gt28 or 30 family.

Twin GT35R's would not be good if that's what you meant. I've said before that a single GT35R would probably make a realy nice daily driver though.

[e.n335]

Originally Posted by hotrod2448

I'd probably go with something from the Gt28 or 30 family.

Twin GT35R's would not be good if that's what you meant. I've said before that a single GT35R would probably make a realy nice daily driver though.

I think he ment a single GT35R.

Do you think the GT28 could be used in a twin-setup ( space ) ? And - isn't this somehow oversized ? Even a single GT30 could do a good job, IMO.

[Curt2000]

People put single GT35R's on 4 cylinder engines...If you want a single set up on an inline six you gotta get GT40 or larger. Everyone has seen the 1000HP 2JZ's with monster turbos on them and they are the same class of motor that the N54 is...Its just a matter of time!

[Sniz]

Originally Posted by Curt2000

People put single GT35R's on 4 cylinder engines...If you want a single set up on an inline six you gotta get GT40 or larger. Everyone has seen the 1000HP 2JZ's with monster turbos on them and they are the same class of motor that the N54 is...Its just a matter of time!

I think Eugene is looking for a good daily driver setup which means quick spooling. I'd love to see a new twin setup developed at a reasonable cost. I would have to think you could put new turbo's in for FAR less than BMW wants for new ones if you blow them. You would just have to go reasonable in size and hp so you dont have to re-engineer all the rest of the components to handle huge hp.

I would be perfectly happy w 400-500hp daily driver setup w ball bearing turbo's.

[e.n335]

The single turbo setup would be a cheaper and more simple system. The turbo lag should not increase compared to stock. Is this a no-go ?

[Curt2000]

http://www.e90post.com/forums/showthread.php?t=138043

Its funny but e.n335 and I both started similar threads within a short period of time.

[e.n335]

Originally Posted by Sniz

I think Eugene is looking for a good daily driver setup which means quick spooling. I'd love to see a new twin setup developed at a reasonable cost. I would have to think you could put new turbo's in for FAR less than BMW wants for new ones if you blow them. You would just have to go reasonable in size and hp so you dont have to re-engineer all the rest of the components to handle huge hp.

I would be perfectly happy w 400-500hp daily driver setup w ball bearing turbo's.

Exactly.

[Sniz]

Originally Posted by e.n335

Exactly.

now go engineer the new setup Eugene.

[ZJP]

I would be all over a GT2876R bi-setup. Fast spool, good power and somewhat still reliable.

[e.n335]

Originally Posted by Sniz

now go engineer the new setup Eugene.

I need your specific knowledge, guys. I can bring the right people together.

[Sniz]

Originally Posted by e.n335

I need your specific knowledge, guys. I can bring the right people together.

unfortunately I do not have the knowledge to help w/ this.....but I am enthusiastic about it!

[Neema]

Originally Posted by e.n335

I need your specific knowledge, guys. I can bring the right people together.

Give this man the information he needs then!



Let there be. . . TURBO UPGRADE

[Neema]

GT60

[Sniz]

Originally Posted by Boost_Nation

GT60

haha....just looking at the one too. Maybe one day if I build a '69 Camaro for drag racing only. You would certainly need some nitrous to get that thing spooled quickly.

[e.n335]

The first question is whether we could achieve comparable driving characteristics with a single turbo setup ( GT30, GT35 ) compared to the stock twin-setup. This would be a basic decision.

[Curt2000]

Realisticaly....replacing the stock turbos with small dual bb turbos will be atleast 5grand...because those things arent cheap and most likely the flanges will not line up which means you will need new DPs to correct for the new geometry...if you use garrets I'm pretty sure the flanges will not even be the same as the stock turbos which means new manifolds...if you think about it the cost will sky rocket with all the extra hardware that comes with aftermarket turbos.

I honestly believe that ported stockies with upgraded impellers will be able to support the 500HP that you seek! and for dirt cheap

[Neema]

Originally Posted by Sniz

haha....just looking at the one too. Maybe one day if I build a '69 Camaro for drag racing only. You would certainly need some nitrous to get that thing spooled quickly.

[u2b]-Jkwt79AxDQ&feature[/u2b] . . . . 2500hp

[m3mobbin]

Anything beyond a single GT35R would be completely pointless unless you are looking for huge HP numbers for a drag car or dyno queen. A GT35R will flow enough for 600 hp, and it would still be still be a relatively responsive turbo, which would work for a DD.

Originally Posted by Curt2000

People put single GT35R's on 4 cylinder engines...If you want a single set up on an inline six you gotta get GT40 or larger. Everyone has seen the 1000HP 2JZ's with monster turbos on them and they are the same class of motor that the N54 is...Its just a matter of time!

Have you ever been in a large turbo 4 banger, boost threshold is way up on the RPM's and power comes on late and hard. Extremely hard to drive and useless for a daily. A GT35R in an e36 is still not the most responsive setup and takes some getting use to compared to smaller turbos and superchargers.

[Neema]

Originally Posted by Curt2000

Realisticaly....replacing the stock turbos with small dual bb turbos will be atleast 5grand...because those things arent cheap and most likely the flanges will not line up which means you will need new DPs to correct for the new geometry...if you use garrets I'm pretty sure the flanges will not even be the same as the stock turbos which means new manifolds...if you think about it the cost will sky rocket with all the extra hardware that comes with aftermarket turbos.

I honestly believe that ported stockies with upgraded impellers will be able to support the 500HP that you seek! and for dirt cheap

hmmm, interesting. . . .

[e.n335]

Originally Posted by Curt2000

Realisticaly....replacing the stock turbos with small dual bb turbos will be atleast 5grand...because those things arent cheap and most likely the flanges will not line up which means you will need new DPs to correct for the new geometry...if you use garrets I'm pretty sure the flanges will not even be the same as the stock turbos which means new manifolds...if you think about it the cost will sky rocket with all the extra hardware that comes with aftermarket turbos.

I honestly believe that ported stockies with upgraded impellers will be able to support the 500HP that you seek! and for dirt cheap

When it would be like this I would be the first one buying the upgrade. Nothing wrong to think about an alternative, especially when no costs are involved. So, can a single turbo setup be as responsive as the stock system ?