BV43A chra into BV43

adamss24

Veteran Member
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Nov 2, 2005
Location
Great Britain
TDI
audi a4 2.5 tdi 98 quatrro 6speed
Just buy a genuine used bv43a turbo, they are cheap... Yellow tag is what you want... That one you've linked in the post looks like it has a cast compressor wheel, the genuine bv43a has a 6+ 6 blade billet alloy compressor wheel...you want the whole turbo as the actuator swaps with the housings- saves messing about with adjusting actuators...
 

Mikey-s

Member
Joined
Jul 31, 2019
Location
UK
TDI
1998 A4 1.9tdi quattro
It was one of your posts that got me thinking of the BV43A chra. The BV43A has a different compressor outlet, or at least I think it does, plus I already have the BV43. I think that photo is just generic, I'm more after the part number confirmation. Thanks for your help.
 

adamss24

Veteran Member
Joined
Nov 2, 2005
Location
Great Britain
TDI
audi a4 2.5 tdi 98 quatrro 6speed
It was one of your posts that got me thinking of the BV43A chra. The BV43A has a different compressor outlet, or at least I think it does, plus I already have the BV43. I think that photo is just generic, I'm more after the part number confirmation. Thanks for your help.
Yep, just as i mentioned in that post, you take the PD turbo and swap in the whole cartridge from CR turbo into the pd housings...didnt i make that clear enough ? I would be very surprised i the Mellet Chra does have billet compressor on it, they build replacements so not necessarily buy replacement parts from Borg Warner/KKK ! From actual experience, mellet pictures on ebay are actual pics for the items they sell so returns are minimal !
 

Mikey-s

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Jul 31, 2019
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UK
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1998 A4 1.9tdi quattro
Found this pic from another Melett dealer which shows a billet impeller.
 

adamss24

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Nov 2, 2005
Location
Great Britain
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audi a4 2.5 tdi 98 quatrro 6speed
Then it looks like the right part ! I was stressing on using genuine due to the fact that you dont need to adjust the actuator with another turbo as its bolted to the chra vnt arm...
 

Mikey-s

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1998 A4 1.9tdi quattro
Turborebuild.co.uk who are a Melett dealer are fairly close to home, I'll give them a call later to confirm this has the billet wheel.
 

Mikey-s

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Location
UK
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1998 A4 1.9tdi quattro
So it's confirmed the Melett BV43A chra does have the billet wheel, see the quote from Turborebuild.co.uk. I'll get my turbo over to them to see if they can fit one and setup the stop screw and actuator.
 

adamss24

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Nov 2, 2005
Location
Great Britain
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audi a4 2.5 tdi 98 quatrro 6speed
The genuine kkk bv43a chra fits into bv43 housings without fouling on the housings- i have used quite a few along the years...
 

Mikey-s

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Jul 31, 2019
Location
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1998 A4 1.9tdi quattro
I spoke to TurboRebuilds in Blackpool, they said they were uncertain of it but would measure it all up if I took my turbo in. Then lockdown happened.
 

adamss24

Veteran Member
Joined
Nov 2, 2005
Location
Great Britain
TDI
audi a4 2.5 tdi 98 quatrro 6speed
Any updates? I have a bv43-109 turbo wondering if the cartridge swap is worth the money?
Buy the whole bv43a turbo, they are cheap 2nd hand and Swap everything From one to the other...its worth-it, the Bv43 has a cast 5+5 blade compressor wheel and the bv43a has a 6+6 blade billet compressor wheel with extended tip technology! Turbine is also a 9 blade Jobbie on the Bv43a compared with 11 blades on the Bv43 from the pd engine !
 

jimbote

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Jul 10, 2006
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spiral arm, milky way (aka central NC)
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Tacoma 4x4 converted to TDI
correct me if i'm wrong but doesn't the bv43a have the wrong flange pattern to fit afn/bhw manifold?... i have a pd170 bv43 on my tdi swapped tacoma and i've purchased the bv43a mellet chra with billet 6x6 wheel...haven't swapped it in yet but looking forward to the faster boost.
 

bbob203

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Joined
Oct 31, 2012
Location
Louisville, ky
TDI
b5.5v
Buy the whole bv43a turbo, they are cheap 2nd hand and Swap everything From one to the other...its worth-it, the Bv43 has a cast 5+5 blade compressor wheel and the bv43a has a 6+6 blade billet compressor wheel with extended tip technology! Turbine is also a 9 blade Jobbie on the Bv43a compared with 11 blades on the Bv43 from the pd engine !

I have the 5+5 turbo can I swap over the intake and exhaust housings from that unit onto the 6+6 cartridge?
 

adamss24

Veteran Member
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Nov 2, 2005
Location
Great Britain
TDI
audi a4 2.5 tdi 98 quatrro 6speed
I have the 5+5 turbo can I swap over the intake and exhaust housings from that unit onto the 6+6 cartridge?
Yes, that's one way to do it however I would buy the whole turbo as its inexpensive and you don't need to worry about adjusting the VNT mechanism/actuator. The CR cartridge fits inside the PD housings and the actuator swaps over with the chra.

Jimbote, yes CR flanges are different and slightly angled compared with the PD turbo...I would use the cr hot side from a tuning point of view as the spacing is different and lets you go with a larger exhaust pipe if you wish although the pd hot side is plug and play on the cr chra...
 
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