yabbadoo4

iTrader: (8)

morning gents, ive got a chance of a jdm 2002 bug sti. just wondering what sort of power these can take and wether they do indeed have any forged internals or pistons as ive read conflicting posts on the subject? what sort of power can they run safely and what turbo/mods would be needed to run 360 bhp or so? ive read they can run 400bhp but im not going that far lol. they seem to be regarded as a good base for further mods? its been mapped at some point as the owner has paperwork stating 300 bhp. would i be right in thinking that would be on ecutek? also would i need to pay a licence fee on top of mapping costs if i want to remap later on? ive done a search on here but didnt get all the answers im looking for so anyone with experience of the jdm bug please enlighten me with your knowledge!

jura11

iTrader: (7)

Hi there

JDM STI are far superior to the UK STI,better heads and better engine for start,brakes are usually OE 4pots if its 16" version,suspension is still OK and with little tweaks car will be great on day to day driving

I would say safe bhp on this engine can be somewhere in region 400-450bhp,above that is possible but on how long etc,people run them at higher bhp without the issue

With simple remap and decat exhaust you should be able to make 330-350bhp,JDM STI usually have been equipped VF30

Its great car for base mods and I would take this car

New age can be mapped like via EcuTek or Open source,both will give you same or similar results,just Open Source is cheaper than EcuTek


Jura

mantazini

iTrader: (25)

You're probably referring a spec c type ra version , as normal jdm V7 sti's came with brembos.... unless you meant them as 4 pot Brembo calipers Wagon V7 sti's came with 4 pot subaru stamped calipers..

jura11

iTrader: (7)

I've seen few JDM STI which has come with OE Subaru 4pots,not Brembo and yes Spec C Type RA 16" has come with OE 4pots

Not sure why some JDM STI has come with OE 4pots,but they're come

Jura

Midlife......

iTrader: (2)

JDM WRX's came with appalling 2 pot sliding type jobbies on the front..........wouldn'd surprise me if the early JDM STi's came with 4 pots.

Shaun

yabbadoo4

iTrader: (8)

thanks for replys guys. jura thanks as always you are most helpful with your advice. the car does have brembos, 6 speed etc all the usual sti stuff. does the jdm indeed have forged pistons or engine bits? i take it it has some to be able to take 400-450 bhp? also injectors will be 550,s im guessing? so if it is indeed running roughly 300 bhp what mods do i need to get to say 360? what sort of max power can the vf30 give? im guessing im looking at another turbo and maybe injectors as well? can the injectors be uncapped? ive heard the term but not really sure whats involved? ive heard of reflowing on the old side feed yellows etc but not sure on newer cars. thanks for any further input guys

jura11

iTrader: (7)

Hi there

Not sure about the engine if does have forged bits,but JDM engines are better than UK counterparts

JDM STI should have 550 Pink injectors,this turbo VF30 should make 330-350bhp

Above that yes you will need bigger turbo,you have few choices in turbo department, injectors should be OK for 400bhp with upped Fuel pressure,but for safe 400-450bhp I would say 650cc/740cc injectors

I would rather invest to better injectors like PE(Power Enterprise) or others,reflowing the injectors is again personal choice,JDM STI or any New age using Top feed injectors


Jura

yabbadoo4

iTrader: (8)

cheers jura, ive read posts on here saying the jdm has forged pistons. im guessing there is plenty of turbo choices? td05 18g? or sc36 or 38? would like quick spool when i do start to upgrade. will be the way it is for a while until the funds recover lol. thanks again for your input

yabbadoo4

iTrader: (8)

got an update on this car guys. went to see it and got some pics. i dont think its a jdm car after all as theres no rear wiper on the car and the fuse box cover is in english. these were the things id read to look out for as tell tale signs that its a jdm. got a look at the paperwork as well. it was bought from litchfield imports so maybe the current owner assumed it was jdm because it came from litchfield origionally? is this a uk car then i presume? what is the difference between this car and a type uk? its got paperwork for an ecutek remap to 300bhp as well as some whiteline suspension goodies.
also mot has an advisory for play in steering rack inner joint (s) would that be an expensive item to repair? anyway heres the pics maybe someone can tell from the pics what it is.

yabbadoo4

iTrader: (8)

if an sti is not a type uk does that mean its an import? confused.com

yabbadoo4

iTrader: (8)

anyone? where are the experts lol.

jayallen

iTrader: (31)

The lack of rear wiper would indicate it is a UK car and not a JDM car.

tubbytommy

iTrader: (20)

+1
another check is jdm sti have ic water spray bottle in engine bay and uk has it in the boot on drivers side.

also the indicators are on the left stalk on jdm, right stalk on uk car.

check for folding mirrors too as they are on jdm cars and not uk.


the spoiler is a cheap copy and id say 99% its a uk car.

yabbadoo4

iTrader: (8)

thanks jay, is that a hard rule in telling the difference? whats the difference between a type uk sti and this ? the vin starts with jf1gdb. after some digging in places it says jf1 is japan or do they all say that as they are made there ie uk cars vin states the same? seller says his insurance company classed it as import?

yabbadoo4

iTrader: (8)

cheers tommy, it does have folding mirrors tho?? i can check the other things later. thanks for the info lads

tubbytommy

iTrader: (20)

the boot badging is all uk too, jdm cars dont have S U B A R U on the boot and no external foglight as jdms dont have a foglight and need one to be registered here.

could have a uk cluster in though

yabbadoo4

iTrader: (8)

cheers tommy, just checked a pic i have on my fone and the light stalks are on the right side ie for switching the headlights on and indicating so must be uk car after all. whats the difference between type uk sti and this then?

tubbytommy

iTrader: (20)

few minor differences but not a lot really.
the later blob and hawks were a fair bit different, but not the bug.

yabbadoo4

iTrader: (8)

top detective work lads, thanks a lot. as said i think the seller assumed it was jdm because it was origionally bought from litchfield imports

jayallen

iTrader: (31)

Not as much as the JDM crew like to believe....Cams(higher rev limit), slight bigger inlet ports in heads, low gear ratios 1-4, different turbo and what has already been mentioned, rear wiper and folding mirrors.

yabbadoo4

iTrader: (8)

cheers jay, so the sti has forged pistons and sodium filled valves etc? think i read that somewhere. also avcs heads? sorry for being a dumb *** but im coming from a classic to this so not a lot of knowledge on these.

jayallen

iTrader: (31)

Bar the cams/ports the heads are the same as is the engine..

yabbadoo4

iTrader: (8)

nice one. vf 35 turbo on this as well i think then? what mods would get me around the 380-400 mark? theres paperwork indicating a 300bhp ecutech remap. im guessing this would just be a fuel pump and decat? its running a miltek exhaust as well.

jayallen

iTrader: (31)

Yes VF35, the JDM has a VF30.....To get somewhere near 400, decat/sports cat, FMIC, turbo, fuel pump, IK, maybe headers depending on budget.

yabbadoo4

iTrader: (8)

ok jay thanks for all your answers bud very helpful. dont think id want to go fmic. i thought the sti tmic would take that power but i guess not. plenty to think about then mod wise! cheers again.

jayallen

iTrader: (31)

The stock intercooler has seen over that power but IMO, for what the fmic costs and how easy it is to fit I'd future proof by fitting one because once the number chasing starts its hard to stop

yabbadoo4

iTrader: (8)

lol dont i know it! my wagon is on 315 and its not enough hence the purchase of this car. will be a slower process on this so will enjoy it as is for a while. cheers.

jura11

iTrader: (7)

Hi there

From pictures looking like is it UK STI,but without the removing turbo,you will don'y now for sure if its UK or JDM

As above JDM STI has have VF30 turbo and UK STI has been equipped by VF35
Agreed JDM STI has have wilder cams and heads are usually Big port heads,which are regarded as best heads

For 380-400bhp i would go with 20G,HRC 300LPH fuel pump,yours stock injectors should be OK with higher fuel pressure at 400bhp,if not 650cc injectors and aftermarket FPR I would add too,TMIC should be OK,but as above I would go with FMIC and possibly with headers too


Jura

Oranges

Apologies for thread hijack, anyone know where the winglets/ front wing reflector things are from?

yabbadoo4

iTrader: (8)

thanks as always for your input jura. how would the 20g spool? i hate lag lol. would a 18g spool up any quicker? the numbers arent quite so important just that im coming from a lighter classic and they say in a newer car you need to run 350 or so to get the same sort of feel? i have a set of api ported headers in the shed which i never got round to fitting for the wagon (my96) would they fit a my02 bug? they would help with spool. i was at ra motorsport to get my wagon mapped from andy f and one of the sidc guys bought a vf35 for his gb270 and had it fitted and it made 360 bhp! of course the gb270 is a 2.5 but the turbo went well. thanks for your input.