Top mount single turbo?

JustWright n54

New Member
Oct 27, 2017
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2008 bmw 335i
Okay I’m in the market my turbos are leaking oil and i dont know if I want a top mount single.. or if I want to stage 2 turbos. But if I decide to go either route I’d like to know which ones are the best quality for the amount of money spent.. tbh I’m not tryna for like 8k at doc racing lol but I’d be perfectly content with like under 4-5k
 

335i_lou

Specialist
Nov 13, 2016
83
31
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Raleigh, NC
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E90 335i, FBO, inlets, outlets
Bottom mount is the route I plan to take. Most people utilize precision turbos. But I’ve also seen BW EFR/SX-e, Garret and others.. really it’s up to you and your budget. There are some really great write ups on this forum. Look around and you’ll find budgets and builds of all kinds! :blush:
 

BOosted 335i

Sergeant
Jun 1, 2017
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E90 BMW 335i
I run a VM(ACF)top mount 6062 GEN2 twin scroll kit.Is reasonably priced and a great kit.Not much loss on bottom end.Just do your homework and see whats good for you and your budget.good luck.
 

doublespaces

General of the Army
Oct 18, 2016
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2009 E93 335i
I've really been on a short runner log manifold bottom mount craze lately. If I did it again, I'd do a bottom mount log manifold with a twin scroll turbo and water lines. People do not need 800whp+ for daily driving or even most racing and anyone exceeding that threshold is making a purpose built car in my opinion. 3.0L engines just don't retain the daily driving aspect when making big power. You can argue that upgraded twins can meet these needs but I'd like to see more third party reports of 800+ before I agree with that.

The other thing I've been high on is a true big twin option, like the VTT Stage 3 or the CPE Atmosphere kit, but both of those are out of your price range.
 

JustWright n54

New Member
Oct 27, 2017
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I kind of want to go top mount something about opening your hood and seeing that monster really hits me
 

335i_lou

Specialist
Nov 13, 2016
83
31
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Raleigh, NC
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E90 335i, FBO, inlets, outlets
I run a VM(ACF)top mount 6062 GEN2 twin scroll kit.Is reasonably priced and a great kit.Not much loss on bottom end.Just do your homework and see whats good for you and your budget.good luck.
How do you like your 6062? I was think about this or a 6262.
 

08_335i

Sergeant
Nov 3, 2016
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2008 ST 335i
How do you like your 6062? I was think about this or a 6262.
If you're like 90% of the people who do a single turbo and plan to actually drive the car, or don't have e85 access, or don't plan on taking the car to 700+whp, the 5862 gen2 and 6062 gen 2 turbos are amazing turbos, and can easilly hit 625whp-700whp if pushed.
 
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doublespaces

General of the Army
Oct 18, 2016
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If you're like 90% of the people who do a single turbo and plan to actually drive the car, or don't have e85 access, or don't plan on taking the car to 700+whp, the 5862 gen2 and 6062 gen 2 turbos are amazing turbos, and can easilly hit 625whp-700whp if pushed.

I am a pretty big advocate of the smaller turbo club. I have a 6266, and honestly I don't think I'd ever need more than 750 unless I had a spare block being built on an engine stand and a new transmission to swap in. Thats why the EFR 8374 has had my attention.
 

335i_lou

Specialist
Nov 13, 2016
83
31
0
Raleigh, NC
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E90 335i, FBO, inlets, outlets
If you're like 90% of the people who do a single turbo and plan to actually drive the car, or don't have e85 access, or don't plan on taking the car to 700+whp, the 5862 gen2 and 6062 gen 2 turbos are amazing turbos, and can easilly hit 625whp-700whp if pushed.
Yeah I think the 6062 is rated for like 750? But I don’t plan to do more than 650-700. Goal would be to have a pretty good reacting/spooling single turbo that can put out decent numbers. I think the 6062 is the route that I’m going to do. Thanks for the response!
 

Tippin

Specialist
Jan 31, 2017
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If i had to do it all over again with my girls doc race kit i would have stayed 6062 or smaller. Unless you plan on building the motor and trans if you have an auto
 
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JustWright n54

New Member
Oct 27, 2017
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So I really wanted top mount at this point I just want to make a statement and really drive the car what are your guys thoughts? I can get the money that not an issue but I don’t want to dump a shit ton into it. Either way my turbos are leaking so either way I’m buying something but what do you guys think in size? 6062?
 

335i_lou

Specialist
Nov 13, 2016
83
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Raleigh, NC
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E90 335i, FBO, inlets, outlets
What are your goals? Do you want to build a motor and transmission? There are some great top mount kits, it just depends on what you’re looking to do.
 

08_335i

Sergeant
Nov 3, 2016
372
217
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2008 ST 335i
My gen 1 5862 (slower spooling then the newer gen 2's) hits full boost at about 3400-3600 rpms at 5300 ft elevation (If you haven't driven a big turbo car at sea level, then high elevation, you have no clue the difference it makes in spool). I drive around on 91 octane at about 500rwhp (very conservative on 91). my E40 map probably makes closer to 575ish-600 depending where I'm at.
 

08_335i

Sergeant
Nov 3, 2016
372
217
0
28
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2008 ST 335i
I am a pretty big advocate of the smaller turbo club. I have a 6266, and honestly I don't think I'd ever need more than 750 unless I had a spare block being built on an engine stand and a new transmission to swap in. Thats why the EFR 8374 has had my attention.
the Gen 2 6062 has my eye for this winter. If I can lock in some solid E access, or affordable race gas, I'll probably do it.
 

335i_lou

Specialist
Nov 13, 2016
83
31
0
Raleigh, NC
Ride
E90 335i, FBO, inlets, outlets
If i had to do it all over again with my girls doc race kit i would have stayed 6062 or smaller. Unless you plan on building the motor and trans if you have an auto
What boost levels were you at and when did you hit full boost?
 

Tippin

Specialist
Jan 31, 2017
89
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New turbo borgwarner s257sxe or as most call it a journal bearing 7670
20171031_160037.jpg
 
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