DT-SPD

iTrader: (7)

Currently making some map tweaks for a new sportscat downpipe.

Im getting 1bar boost at 3100rpm in 3rd gear, was expecting a few hundred rpm less to be honest.

Be interested to hear what others have got ( rpm for 1bar boost ) and with what spec.

Cheers
Dan

KAS35RSTI

iTrader: (73)

What mods?

DT-SPD

iTrader: (7)

H&S sportscat ( open bellmouth ), 2nd de-cat, non res centre, classic design rear box, all in 2.5"
STI panel filter

KAS35RSTI

iTrader: (73)

What are you using to monitor boost? Dont get your head messed up with all this boost business. You will stop enjoying the car less & be more involved with trying to improve the boost.

Sometimes you have to do a few runs - also depends on weather etc.

DT-SPD

iTrader: (7)

Using the map sensor value direct from the ECU via the laptop running RomRaider logger software.

Just wanted to know how different spec's ( normal cats, sports cats, decats etc. ) change the spool/boost response. I want to get my moneys worth from the sportscat downpipe but dont know what is a realistic expectation.

DT-SPD

iTrader: (7)

Come on everyone, loads of views but no one posted any data

let me know at what rpm you get 1bar boost ( go WOT in 3rd gear from 2000rpm and note the rpm that gives boost = 1bar )

chopperman

No idea mate as i dont have a guage but when having mine mapped i was told the boost drops off to about 1 bar on higher revs. Probably to stop it lifting the heads. 2.5 sti.

alcazar

iTrader: (2)

To get it to spool earlier, you need to speak to Harvey (Smith) about one of his trick up-pipes.

He will need to know what turbo, what headers and what exhaust.

DT-SPD

iTrader: (7)

Thanks for the replies, I know what hardware changes need doing for earlier spool, I just wanted to know if what I've got from my sportscat matches the norm and how much difference a decat downpipe would make.

So far I've not seen much of a difference in spool compared to a normal downpipe cat.