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will an upgrade to an sti tmic be overkill for my setup-04wrx
Hi all, Im just after a few of your guys opinions and experiences with this. I have an 04 uk wrx blob, i have got a hybrid billet td04 with larger compressor wheel to go on rated at about 320 bhp. along with some nice supporting mods ive got ready i am hoping to see a good 310-320. so atm i have the standard top mount running the upgrraded silicone y pipe. if i keep this i will be getting a turbo blanket, dei heat reflective tape on the cooler end tanks,sides and piping and doing the throttle body coolant bypass mod try try and slow down any heat soak. the car will only be used for road driving really. So ive been looking into the sti newage topmount but needs the undertray and scoop to make the most of it. I just want to know really if anyone out there runs decent power through the stock wrx tmic, wether it will be restricting a road setup shooting for 320bhp, or wether the sti tmic will defo be needed. What are you guys opinions on the stock 04 blob wrx tmic for max power etc. When you start adding up costs for the cooler, tray and scoop it gets expensive so i only want to pay it out if its needed. many thanks in advance
I think the standard works up to about 350 bhp. However from what I understand you'll need to upgrade the injectors and fuel pump before that.
What mods have you got to your exhaust?
If you're concerned about heat another mod to look at would a header tank spacer kit. It's not going to solve all the under body temp issues but for less then £20 and 5 minutes to fit it's worthwhile.
However, I'd would advise some caution, you're getting close to the max power a wrx will cope with...
But if you do go down that route I've got an freshly acid dipped sti top mount, plus a de-cat up pipe and turbo blanket on the for sale section if you want to make me an offer...
hi thanks for the reply. im aware of the risks, ive always been pretty lucy with running high power through cars, i am quite mechanically sympathetic as well i suppose. ive ran 350 through a classic t2000 and 400 through an evo 5 both standard engines without problems for years. if the engine or box goes it goes it just means its time to upgrade then.
but anyway, the rest of the mods will be as follows...
walbro 225 pump
pink sti injectors
cossy panel filter
intercooler y pipe
silicone reinforced turbo inlet hose
prodrive sport cat with open neck entry and 2nd cat delete dei heat wrapped
the hybrid td04 that ive already mentioned
harvey trick up pipe dei heat wrapped
rest of exhaust 2.5 straight through to ninja back box
the header tank spacer kit, yes that is also something i am going to do as like you say for the price it cant hurt!
im toying with the idea of not bothering with the sti intercooler upgrade cos i could get the stock headers ported by as performance who do the harvey up pipes. maybe this will get me more porformace gains for my money rather then an intercooler if thats not needed.
last thing i want though is on mapping day is him saying... the setups got loads more to give but the intercooler wont let me push past 300bhp... if you get my drift.
Or maybe wait another month or so and get the cooler as well. lol.
But if you do go down that route I've got an freshly acid dipped sti top mount, plus a de-cat up pipe and turbo blanket on the for sale section if you want to make me an offer...
Hi yes i have actually seen it advertised. has it since been tested since the dipping process to ensure it its leak free? p.m. me if you prefer. thanks
first time ive heard of a header tank spacer kit, whats the crack?
Dont get too excited. It's basically a couple of bits of heat resistant nylon bar that separates the header tank from the drivers side of the inlet manifold. I've heard it can reduce the temperature of the inlet by about 20 degrees. Cheap and quick to fit though. http://www.ebay.co.uk/itm/222167299850
Here is one fitted to my wrx
Last edited by Cambs_Stuart; 25 July 2016 at 02:06 PM.
I am looking to reduce under bonnet temps as much as possible, it this a mod for both wrx and sti ?
basically just stops/slows down the heat transfer from the hot header tank into the inlet, the same way thermal spacers between the inlet and heads work. helps keep the inlet cooler thus keeps inlet temps down also.
think AS performance also sell the kits to do this as well, and yes for wrx and sti.
It shouldn't be a restriction at your power levels.
However, there are pros and cons with fitting an STi unit. Obviously reduced temps from bigger core - which may be helpful with your hybrid if you are running increased boost. Downside is of course that it will increase spool, as there is a bigger volume to fill.
So if your WRX item is sufficient to not effect performance, then by fitting an STi item, all you are doing is increasing spool. Which would somewhat defeat the point of the hybrid TD04.
I would say it's an optional mod; there are more important, better bang for buck parts to fit first. Maybe buy one and see if your mapper wil map with the WRX and then the STi fitted, to see the difference? You can always get your money back from selling it on again. Or just ask your mapper if they have a preference.
Last edited by TECHNOPUG; 26 July 2016 at 01:39 PM.
It shouldn't be a restriction at your power levels.
However, there are pros and cons with fitting an STi unit. Obviously reduced temps from bigger core - which may be helpful with your hybrid if you are running increased boost. Downside is of course that it will reduce spool, as there is a bigger volume to fill.
So if your WRX item is sufficient to not effect performance, then by fitting an STi item, all you are doing is increasing spool. Which would somewhat defeat the point of the hybrid TD04.
I would say it's an optional mod; there are more important, better bang for buck parts to fit first. Maybe buy one and see if your mapper wil map with the WRX and then the STi fitted, to see the difference? You can always get your money back from selling it on again. Or just ask your mapper if they have a preference.
thanks bud. think im going to just get a set of stock headers ported and be done with it. got pretty much everything i need then really hoping for some quick spool and low down grunt on the setup but still pulling well to 6k
i bought the unit used and i waited pretty much 4 months to find one for sale. its only done 15k as well. its got the larger billet compressor wheel, with machined comp housing to suit (i think the wheels a 19t, its rated at 320 anyway) upgraded 360 degree bearing set, and the comp housings ported and polished. i think the exhaust wheel and exhaust side housing is still stock though.
I have a spare TD04 that I intend to hybrid at some point (as well as rebuild). Will go with a 19t compressor and the housing but probably also try a modded exhaust wheel.
Be interesting therefore to see what figures you get.
25 July 2016, 10:07 AM
will an upgrade to an sti tmic be overkill for my setup-04wrx
