ernieman

hi folks i have a 1995 wrx i have had it for one year
i have found the ecu and i think its all stock
how can i make the turbo come in faster.

thanks for your help

T5OLF

iTrader: (4)

Port the headers out and change the uppipe and decat the exhaust system. You can't do to much without needing remap really.

ernieman

hi i am a new to all this what does port the headers mean

thanks

T5OLF

iTrader: (4)

The headers or for a better word exhaust manifolds don't always match the heads and you end up with a lip that slows down the exhaust gases. The manifolds need removing and porting out with a grinder or you can buy them already done if it's not something you can do. They will need heat wrapping as well.

soot line:


After porting:


If your handy with the spanners then you can do it yourself. Do a search on here there is plenty of info.

Marx Mcrae

iTrader: (4)

Basically if you want to reduce spool up time you need to get the exhaust gases flowing better through the exhaust and headers. The faster the flow, the faster the turbo will spool up.
The easiest ways to do this is to de cat the exhaust (remove the catalytic converters), both the down pipe and the centre section. This will get the gases exiting the turbo quicker.
If you want to go a step further you can port your headers and up pipe as meantioned by T5OLF. Basically what your trying to do here is to reduce the friction in the headers that will slow the gases down as they enter the turbo.
You can either buy some headers and an up pipe that have already been ported, I bought some off here for £200, or you can do it yourself if your competent with a grinder.
Once your headers have been ported then the flow will have been speeded up when entering the turbo, therefore making the turbo spool up quicker.
Obviously once you have done these mods it is always a good idea to get the ecu remapped to make the most of what you've done

ernieman

thanks for all the info i will do all the work myself no probs
can i up grade from a z4 ecu

cheers

myblackwrx

iTrader: (1)

Check your pm or you have to replace the entire ecu

Varboy

If you confident and or brave, you could always have a go porting and polishing the hot side of the turbo. Lots of great threads on porting turbos on NASIOC.com.

You have to dismantle the turbo, so I wouldn't personally try it but as I say, if your confident then the rewards can be fairly substantial in that you will measureably reduce spool point and lag.

ernieman

hi thanks again i am a machnic 25 years but not on subaru's
this is the first think i will do the turbo to i done the headers today
good job but the turbo sounds like a good thing

thanks for your help

dan83590

What is the difference now you have done the headers?

Marx Mcrae

iTrader: (4)

Damn you dont mess about.

ernieman

hi all it used to be when i was changing from first into second
there was a bit of lag its gone no probs thanks for that part plus the spool up from start is far quicker.
i have the turbo nearly out so this should be fun. i will keep you posted.

thanks
cheers

ernieman

hi all done the turbo today well i took it to bits on monday
got the pump reconed grinded and polished everthing
just put it all together today
i am very glad i did there is a td05h turbo in it
i have just started it tonight and let it warm up
i will take it out tomorrow and keep you posted.

should be amazing.

ernieman

hi i let it warm up to the running temp
it sounds very very good engine at idle
sounds amazing
took it out for a blast i had to take is slow
for a while it was very hard cause i
put new pads and dics all round so
there where no brake realy
but then i put the pedal down to the floor
so much power just to do the headers
and the hot part of the turbo
like a new car no lag at all its like sitting on a honda cr 500
scrambler

thanks again for all you help
made a really good job

thanks

Marx Mcrae

iTrader: (4)

Was it a difficult job porting the hot plate?
If so how much to do mine

ernieman

hi m8 i done all the work myself it has made an amazing job
but if you leave it in you really dont no what they do
i would say its up my bhp by 30 its a real good job
if i was doing in my garage i would charge 50 pound
thats because we are on scooby net
its a lot of work but some differance

Wurzel

iTrader: (1)

You can also lighten the crank pulley so that the engine doesn't have to work so hard to spin up, the stock pulley weighs a massive 2.5 kg, change it to a Perrin one of 500g and you will notice a big difference straight away.

ernieman

thanks i am changing all the pulleys to light weight

thanks agan for all your help it have
gave me about 50 or 60 bhp more
very fast spool up that fast that it
is starting to scare me
i put new disks on all round
and just burnt the front ones out
again last night.

thanks thanks

scoobynet rocks