Dmacnz

Seen some really impressive dyno graphs of big turbos, is their any "secrets" to increasing the spool up in the tune?

Thanks
Dan

gazney101

iTrader: (5)

Avcs and a correctly matched up pipe help out a lot apparently

NotFromSomerset

Antilag map?

Dmacnz

I found some info saying that subaru's maps have a lot of timing low down to keep emissions and turbo not spooled up for fuel efficiency. Dunno if its rubbish or not.
But logic is saying retarding a bit of timing at spool up should put more heat/energy into the turbo to help spool?

I am currently running around 27-30 degrees at spool up...seems like too much!?
making 1.5 bar at 4500rpm on a Ej20K with a billet td05-20G

Can anyone shed any light?!

john banks

Retarded timing can increase spool but give a loss of torque. Depends on the installation. Every time I fitted a new turbo I could tell even before the map was tweaked whether it was a spooler or not, mapping is icing on the cake. Dyno spool is not often real world relevant, various tricks to make it look good/bad.

Linksfahrer

Make sure your Waste gate does not open prematurely. When I fitted a new turbo the acutator on it was opening already at 0.25 bar , It cost me top end max boost and low rpm spool up character.

The answer for me was to change the WG actuator to one that started to open at a higher pressure.

Also don't use FMIC or larger TMIC until you need one for the other mods , as the extra volume of the intercooler and its feed pipes still have to be compressed , hence more lag.

ditchmyster

iTrader: (7)

Smaller hybrid billet turbo FTW.

Infected by sti

iTrader: (6)

EFA