Hi guys,
I remember seeing a while back a really useful & pretty long thread regarding tuning a classic, but can't seem to find it anywhere!
Thought it may have been sticky'd, but it doesn't seem like thats the case. I was hoping to find that as i've used the search & can't find answers to a few questions i have!
Anyone have a link to any good reference points for tuning a pre facelift classics?
Thanks everyone,
James

 

This gives a good idea of the various "stages", before delving into researching specific products/prices, etc.:-

MY93-96 Tuning Guide

BTW, the Subaru turbocharger scene has come on a bit since that guide was written, so some of those turbos mentioned can be substituted for arguably newer/better designs. Any specific modding questions, just ask...

 

Ok mate, that looks helpful, thanks
I'm not new to tuning stuff, but new to impreza's! (More used to Skylines, 200's & Evo's!)
Theres just a few things i'm looking at, the turbo will come later as i'm not sure which turbo would be best for my needs at the moment...!
Thanks again mate,
James

 

Actually i do have a question! Where would i get a resonator delete pipe?? Could make something, but a purpose made one would probably be neater!

 

There are a couple ready made ones:-

1) The silver all metal A'PEXi one. But it comes as a full kit with the Power Intake cone filter, etc.
Unless you can find a second hand one for sale by itself...

2) There's aslo MRT's (Aussie company) black metal one.

3) Also, K&N do an induction kit, comprising cone filter and plastic/rubber res. del. pipe.


If you buy the full kits, just fit the res. del. pipe, and NOT the cone filter (sell it on) - i.e. keep the OEM airbox/panel filter (and obviously MAF). Car runs much better with OEM induction (up to c.350bhp).

 

That'll be something to look at, as it currently has what i believe to be a rather sorry looking K&N..!
I'll go check out the MRT ones
Cheers

 

MRT one is bloody expensive though - around £130 IIRC. Maybe more!!!

Prob. cheaper overall to buy the A'PEXi Power Intake kit (c.£90 IIRC), and get a bit of money back on the sale of the cone filter

 

That makes sense then! Is there any reason not to use the cone filter? As i don't actually have the standard air box!
& i understand i'll want 440cc injectors? Would these just be the standard MY96-00 classic ones?
Cheers,
James

 

98-00 is phase 2.
you would need phase 1.5.

 

Nice one, thanks. What are the phase 2 injectors? Are they still 440cc, just wont fit my '96? I believe mine are 370's?
So a phase 1.5 must be 96-98 & 440cc's?
Thanks everyone
James

 

yes they are called phase 2 and are yellow 440cc,they were fitted to 98-00 cars,you can fit ph2 injectors to your car but it means buying a adapter from carl davey which is £35 i think.
on a v4 sti they will be phase 1.5.

 

Nice one
I've seen lots of 440's on here & ebay, but wasn't sure if they were correct. I don't suppose the phase 1.5's are a different colour? Would make identifying them a bit easier!
When i get the 440's, and a resonator delete pipe, i think i'll need a fuel lab regulator & i'll be ready to get an ESL & hopefully some extra power!

 

As 99gw says:-

MY97/98 phase 1.5's = straight swap
M99/00 phase 2's = will fit with <£40 Carl Davey adaptor kit

Re. cone filter - will be fine when you get it remapped, as its different flow characteristics is accounted for for the MAF scaling and the fuelling requirements.

 

The 1.5s are of a slightly different design to the 2's. The 1.5's have a longer pintle (the nose where the fuel spray out from. Plus the O-rings are different. They're both yellow though.

1.5's


2's

 

when joz sells me his injectors you can have my 440s,they are ph 1.5.
i also have a set of ph2 440s if you wanted them but you will need to buy the adaptor.

 

Well i'd rather get the direct fit ones, there seems to be no advantage in getting ones that need an adaptor to fit
I'll get a wanted thread up for some phase 1.5 injectors.
I'll tell you what i'm looking at with the car,
Full 3' turbo back system
Walbro
TD05 (standard)
Apexi induction/resonator delete
440's
Fuel Lab regulator
ESL & mapping
That should see me to around the 300bhp mark shouldn't it?

ESL & mappin

 

440s good for around 325-340bhp on average.

Great mods/brands you listed.

But the tiny TMIC will prob limit to about 280bhp.

Your TD05H 16g is good for c.330-350......

 

Apexi hardpipe doesn't fit with standard airbox I saw a really nice one on someones car the other day which was a straight pipe, was unbranded so I assume it was home made. Easily done by someone with basic pipe and weld skills

You don't need 440 injectors really but it's a good idea. Your biggest problem is that poor excuse for an intercooler

As a quick and dirty list...

Decat
Filter
Injectors
Fuel pump
ARC Intercooler
Service with the very best liquids and lubes
Turbo blanket is also a very sound idea given the I/C
ECU remap, ESL or Apexi with boost controller

 

I'd prefer the 1.5's if possible? I'm in no real rush, the car is hardly used right now
Although if the adaptor is only 35quid i could buy that, it wouldnt be a problem!!

 

PH2 injectors are much better due to the more refined spray pattern

 

I meant to put intercooler on that list actually, was just going to go for an FMIC as the car will be used for track/sprint use & thought it may be best to go for that.

 

Ok, how much for the phase 2 jobbies?

 

I would go straght to 550s, as your 16g (assumng a saloon?) is capable of 330-350 (so long as you fit that FMIC) - and it's borderline if the 440s will do the upper figure. At the very least, they'll be near 100% IDC - not ideal

 

Are 500's aftermarket or fitted to a standard impreza on a particular year?
My TD05 could manage up to 350bhp? That surprises me, i thought i may be pushing it with my aim of 300ish

 

I paid £45 delivered

 

Is it a saloon? Or Wagon STi? If either, it'll have a 16g, yes.

350 is prob the exception, rather than the rule. But they can, and do make that.

But if you 'accept', say, 330, then you can't get dissapointed lol

 

TD05 won't do a true 350 no I think Bob5 managed 340 with 10% NF IIRC be happy with 320 with maxed IDC 440's, maxed Maf and a 5 speed that won't implode with a month

FMIC is a must for events but this takes away your airbox more power and you need to budget for a six speed and much more besides ...brakes chassis etc

 

Yeah, i've looked into chassis/brake upgrades, & ideally i'll go for a 6spd.
I'd be happy with 320 in a stripped & caged classic, i think that should go pretty well!!
Is it a good idea to max the injectors though?
Been told a MAF from a phase 2 is worthwhile too?

 

Silent Running (remembr him?) got 350. So have others, I believe.

But as I said, 350 is the exception, rather than a rule. And I don't mean on 440s; 550s or better (+ FMIC).

And I agree, that if OP accepts the 320-330 bracket, then he shouldn't get 'disappointed'.

 

Oh & its a saloon 2000 turbo