Borg Warner ko4 vs FrankenTurbo F21?

Yes pretty much unsure wether its K04 turbine housing though.

As per my message BBT is a better option and is UK based.
 
No, the 418T is a S3-K04 hybrid.

You want the K250/280/300 range for K03 fitment on the A4.

Frankenturbo and BBT are both K04 based hybrids with varying specifications. I think the F21 has a 50/42 turbine and a custom compressor wheel thats a little smaller than the wheel used in the K280 (which uses a 56/42 wheel from the 8LS3)

The K280 is basically a 8LS3 K04 turbo which has been modified with a K03 turbine housing to fit straight onto the A4.
 
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Actually, scratch that, the F21 uses a compressor thats more like the K300 compressor. Its a custom billet ETT wheel thats about the same size as the 2280 wheel used in the K300, but the F21 has a smaller turbine.

Which means the F21 probably sits somewhere between the K300 and K280.
 
What are the power ratings for the 250/280/300? Also do people use one of the cast manifolds which crack with these along with uprated maf and injectors?
 
Brad: yeh that doesnt look like a billet wheel, and the dimensions suggest its smaller than the K280, as the tips of the ETT are 55mm, the wheel itself is probably 52. I guess its just a custom casting rather than billet.

The photo on the frankenturbo website appears to show a 56mm wheel without the ETT, but that may just be camera trickery:

http://www.frankenturbo.com/new/webimages/large/F21_exducer.jpg

If its 56mm including the ETT then its smaller than the K280.

Soupie: The numbering is roughly the power output you can expect, with all the suitable supporting mods in place.

The K300 on the A3 has gone over 330hp IIRC, but the A4 housings are more restrictive so its likely you wont get as much.

And yes, you will need some sort of upgraded exhaust manifold to get near the top end of those figures.
 
Interesting. Their website does not have that many details. These seem like a decent upgrade if you have blown your turbo and do not fancy the TFSI or full BT setup.

300bhp would be nice.
 
Id love a BBT, just can't get hold or make an order :/
 
EvilSnow said:
How's yours holding up Bradders?
Click to expand...

Its only running 8-9 psi at the minute, and the manifold is cracked slightly again in the usual place i think (between runners 2-3) hence why im going a the BT route.

Im waying up ext wastegate route but its just the manifold thats costly and puts me off as there only seems to be the full race job then theres others from the likes of Germany but are for transverse engine cars that could probably work but theres the issue of turbo hitting the head/valve cover.
 
My K300 has a stock manifold which was ported by Badger5. Not ideal, and wont flow as much to get the headline figures of the upgraded units, but they're reliable and dont fall apart.
 
I did not realise you had a K300, how does it feel compared to a normal remap? What injectors etc you running? An aftermarket manifold would be good but they seem to all be chocolate.

My 034 one cracked eventually.
 
Its not mapped yet, so its not really representative of how it should be. Certainly goes alright on actuator pressure (~11psi). Plan to get the map sorted out this spring when the weather improves!
 
Cool, I would not mind haveing a look at the car once its all sorted if that is OK. I am in Edinburgh so could meet near the bridge somewhere.

Who will you use for the map? If they are far away will you run the car down or post the ECU?
 
Are there any bits from S4 we can use for ME7 conversion or is it passat only?
 
Yeah S4 you can use the pedal box from the S4 iirc or i think you just use the pedal as its mounted different not to sure. I started a thread not long back thinks mark posted some stuff in there (bit of a list) so to speak. Il tag you in it now.
 
Thanks. I will give it a read.
 
My view is thus:

Either buy a small/mid sized hybrid that will probably top out in the 270 region on the standard manifold, or if you want more, buy a K04-064 and fit that.

Theres no point IMO fitting a TTE280 or K300 etc on the standard manifold, as you end up with the laggier drive of a bigger turbo without the power to show for it. Theres also no point fitting a aftermarket manifold to a daily driver as they just dont last and you cant be doing with that hassle. Choosing a smaller turbo means you get better spool and less lag while still making the power the stock manifold will manage.
 
Cool Docurley. Never realised the 190 bhp A4s had a thicker manifolds until now.

I had a read on the bbt k280 and k300 turbos. On the U.S. sites people seem to prefer the 2280 comp housing used on the Porsche GT2 and Focus ST as they said the RS6 2275 housing was 'old tech'. Not sure whether this is correct however.

The TTE using the 2283 from the 8P S3s maybe is a bit large.

I think I would go for the K300 that you have Aragorn as its seems decent value. I didn't read up much on the frankenturbo as the website puts me off with all the cheesy "are you ready" etc. plus it comes with lots of extra kit.

See the 3" maf that people use I think from the vr6 is it the one with the sensor bolts in line with the flow or across the housing. Is the TT 225 or S4 maf an option too?
 
audi upgrades
I read about a guy who looked at Frank's turbo charts and proved they were faked and there turbos were junk.
 
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Soupie69uk said:
On the U.S. sites people seem to prefer the 2280 comp housing used on the Porsche GT2 and Focus ST as they said the RS6 2275 housing was 'old tech'. Not sure whether this is correct however.

The TTE using the 2283 from the 8P S3s maybe is a bit large.
Click to expand...

Your confused in refrance to the quotes on housings when in fact you seem to be talking about compressor wheels.

The 2283 compressor is we feel not too large over 2280 that we do use on other stages. In fact its same geometry as 2280 and same exducer size but has 1.4mm bigger inducer Dia. The 2283 compressor flow map is based from 2280 and is not messured. So really is not so far apart or BorgWarner would have messured. Main differances is 2283 is billet where as 2280 is cast. 2283 and flows more due to bigger inlet.
 
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