In the past 5 years I have learned a lot from various forums and use that information to modify my car with the intention to have a better road car with good sport performance and occasional 1/4 mile race. Here is a graphic story of my Cars evolution from stock K03 to whatever it evolved into, English is not my language so I will not put much detail in the descriptions but if someone have a question fell free to ask and I will try to share whatever experience I gained.
The cam bridge has a pressed in check valve that can get loose and block the oil pasage to the top of the head, to prevent that I fixed it with a small bolt.
I'm impressed. Also, a little curious. What kind of power do you expect to make? Is there a reason to have the larger turbo feed the smaller one? It seems like it should be the opposite, but from a packaging standpoint it makes sense.
One last question, if you don't mind. When you drilled the hole for the bolt to hold in the check valve on the cam bridge, how did you do it? Did you measure at the top with calipers and then go to the bottom with a punch? Also, were you able to just use a cordless drill or do you have a drill press that can clear into that area? What size tap / bolt did you use?
Sorry for all the questions. It really is great work.
I would like to get 500whp, the turbo arrangement is a compound setup that is quite common on diesel aplications and is getting its way into gas engines, in simple terms is like puting a turbo on a turbo engine. The main reason for me is to have as little lag as possible, it drives like a stock k04 with the extra power on top.
For the cam bridge I used calipers to meassure a punch on the outer part and a drill press, tap is m4 and I used red lock tite to hold the bolt.
Any updates on this? Im doing compounds on my b5 with a ko4-015 (38mm compressor) and an ebay t3t4 and it spools instantly. Im thinking of putting a gt35 on the back of my ko4 hybrid (42mm inlet 9 blade turbine) in my b6 but am not sure if a gt35 would be the best size.
I succesfully managed to operate the AVS on my engine, it required an ECU swap from a TT engine cide CETA. Now I need to tune it but it sims that this cpu is not very comon and Eurodyne does not orovide support for it, any one now of an alternative?
I think you need to go larger on the secondary turbo, as a rule of thumb it should be able to flow twice as much as the primary at a low pressure ratio, in terms of Hp K04=330 Gt?=660.
Another way of sizing the large turbo is to concider that a 2.0 l engine at 1 bar (15 psi) flows the same as a 4.0 l na engine, thats what the big turbo will be getting.
Nice build!
Quick question where did you put your primary O2 Sensor did you keep it around the stock location after the first turbo or does it now have to go downstream behind the second turbo?
Thanks
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Related Threads
?
?
?
?
?
Ask a question
Ask a question
VW Vortex - Volkswagen Forum
84.4M posts
1.5M members
Since 2001
A forum community dedicated to all Volkswagen owners and enthusiasts. Come join the discussion about performance, builds, modifications, classifieds, troubleshooting, maintenance, new releases, and more!