how to get the turbo to spool quicker?

[mattm]

So im on KO3, remap, forge 007p and FMIC. Great power (all be it ko3!!) but it spools up way too slow for my liking (around 3-3200 rpm). My mrs. MK5 GTI spools up at 1000rpm for god sake!

Any ideas? cheers lads

 

[Prawn]

a ko3 spooling up at 3000rpm is not good at all....

a standard ko3 should start spooling up at around 1800-2000rpm. My ko3S can make a good 14psi of boost by 2400rpm.

Is your FMIC stuipdly big? if it's got a HUGE volume then that's going to slow down the spooling big time.

What downpipe are you running? I found fitting a milltek 2.5'' downpipe and sports cat to my ko3S made a HUGE difference. the spool up is almost instant now, foot down and it boosts straight away, no waiting for it to climb.

 

[mattm]

hmmmm interesting. The fmic isnt too big, but i understand there may be lag due to more piping etc. Before it was pretty much the same, around 3000rpm.

When I meant spool, it probably does start at 2000 but I can only feel the boost around 3000rpm if you know what i mean.

Standard downpipe mate, just cat-back exhaust.

 

[Prawn]

Interesting. My ko3s starts pulling hard at about 2500rpm, making 290lbft at 3500rpm, so that's the real shove.

Have you had the car on the rolling road? if so, post up a pic of the torque curve. As torque and boost are so proportional in turbo cars, you can often see what's happening from looking at the graph.

Heres mine:

 

[mattm]

cheers

i need to get it on the RR and see. i think the fmic will be lagging it. definatly need a ko3s too.

 

[Caesium]

Get a fuel injector into the turbine housing, that'll make it spool a bit quicker.
Maybe also check the wastegate operation.

 

[Prawn]

ko3S is a great mod.

Get the boost nice and high, and you get a seriously large wedge of torque!

290lbft is a good figure even for a ko4 car, and in the fwd A3 it does pull very well

 

[Mr.Blonde]

How do you check the wastegate operation then??.

 

[Prawn]

bypass the N75 valve and join the two hoses, so you have a direct line from the charge pipe to the actuator.

Hook up a boost guage and go for a drive, then see what boost the actuator opens at....

stock on a ko3/ko3S is around 6 psi