KO4

[jtomlin]

so more power is available from this ko4-1 than the 'S'?

[DarkGti]

k04-1 is pretty much k03-s housing with the only differnce being a k04 exhuast wheel inside im led to believe.turbo bolts straight on.if you go to backdraftmotorsport.com they sell the upgrade.had a boost gauge which told me turbo boost.had a rolling road done in the middle of a hot day on a mobile dyno!!which isnt recommended anyway because they not to accurate and got back 230bhp with 300lb/ft of torque and the car which i later found out had a bolt loose on tubro to manifold which was leaking slighlty.have no proof as i sold the car but being honest as i can and just giving some knowledge from previous experience!!just tyring to help really mate

300Ibft now you are making me laugh!

[sambo]

Ivormk4turbo = 227bhp my old mk4 = 221bhp with a slight dip in curve so not running 100% spot on, both with similar mods (TBE, DV, TIP etc) so 230bhp on another set of rollers seems belivable to me.

Certainly opens up a new can of worms with the ko3s, definatly worthwhile doing the swap, can't comment on the ko4 conversion but the impression I got when looking it up is it's quite a bit more money for not a lot more performance.

Better off going whole hog BT conversion if your after the big figures IMO!

Don't forget brakes aswell! (even ko3s)

Sam  

[alexmatt]

yeah there is a bit of differnce,the argument is though 800quid or so for k04-1 and a lot of people wont pay that for a little bit etra....i did!lol but i did notice the differnce.when i got mapping checked too i was told to wait for the weather to get a bit colder etc and the boost could have been raised slightly more.i thought the car was quick personally

[DarkGti]

mine's running 237bhp 243Ibft with the agu ko3s and thats more than enough in a FWD mk4 as you wont be able to put the power down!

[alexmatt]

honest to god 300lb/ft with 1.6bar of boost.figures mean nothing though do they?mines got more bhp than yours etc.couldnt care about figures,as long as the power feels good.the car drove lovely

[alexmatt]

i agree did spin up quite a bit,was considering lsd as next mod before i sold her.

[Devilz]

so ko3s is wise upgrade then, is it straight bolt on or need extra bits as well?

Also where can I get ko3s and how much ££££?

[DarkGti]

ko3s is the best turbo upgrade for the AGU engine by far! good gains with minimum expense! the ko3s can be sourced from a number of vag vehicles! audi tt, seat leon, mk4 golf etc!

[MaXXeH]

i have got a k04-001 on my AGU  and was mapped by Rtech

Nick info
With the lower boost mapping you made 5500rpm AFR 11 the eddy brake load cell gave you 161 kw at the wheels x 1.1341 = 215.9 wheel BHP/  est 250 bhp at the fly. 
Now with the 3 psi boost change peaking to 23psi I would say your 250+ still with a safe AFR. 


The Turbo is not pushed to the limit.