This is a better representation of how someone would apply the throttle.

 

Nobody ever tried this? I can''t believe that, full boost @2k rpm together with a big turbo

 

William who is going to be selling these kits now?

 

This type of somewhat old school twin-charger system is more or less out of date now. First it is pretty complicated to get it to work optimally, but more importantly there are better choices. Another old school alternative are sequential dissimilar turbos, these were used by Mercedes back in the day and were a basic twin turbo setup, but with a larger 2nd turbo for more high end power.

Now you can get variable geometry turbos as are used in the new 997 turbos which can give you essentially the equivalent of a small turbo at full boost that dynamically grows to a large turbo at full boost as your rpms increase.

 

Probably better to ask Mark - I think it will be the shop he works with.

 

When the time comes I am sure the word will get out quickly.

 

Hmmm, I wonder if I should get my oil jet bolts done before this one?


Since I plan to instal an EMU this summer and use it to perhaps tune this eventually, what would the tuning FI for dummies be? I am guessing one sets the unit up adding fuel and pulling timing to be safe to start with and go the other direction? (subtracting fuel until one gets to correct afr, and adding timing to somewhere short of knock) No?

 

Make sure you do this on a loaded dyno


Set a very safe timing map.


Set A/F appropriately


Adjust timing map (use of either a knock mic or a OBD scan tool that is able to read real time ignition timing is needed)
Watching the actual timing form the scan tool you can see the stock computer start to pull timing when it starts to hear knock. Knowing that piece of data you know your current EMU timing is right on the knock threshold for those given inlet temps and A/F.
Adjust the timing map appropriately. Usually a point or two.

Re adjust the A/F (if necessary) they tend to change when one messes with timing.



Rinse and repeat

 

Any updates?

 

Pretty sure Mark is all installed and just about tuned. He should be able to provide info on the time-line.

I am planning to install a higher boost pulley as soon as I find time to re-tune.