Hi,

Going to get a tek 3 on my uk 00 soon,it has freeflow filter,decat down and mania back box,run it on optimax mostly,have a boost gauge and KL fitted as well, what i would like to know is should i put a set of ngk 7's in,add a decat centre and start chucking ob in ready for the remap in a months time,will i get more from the car and map with these things done or will i be wasting my time?

I have given the car a full major service ready for remap but was'nt sure on plugs so re gapped the old ones for now.

What power gain should i get and what boost will it run?

Cheers Paul

 

If you run it on 'Optimax mostly' surely throwing a load of octane booster in her prior to mapping is only going to end up with your car being mapped for a fuel you don't always/often/ever use.

You will get more from removing the centre cat - how much though I have no idea.

My MY00 was mapped with the OE plugs in but I have now changed to 7s.

With a full de-cat, green panel, samcos and a John Banks TEK 2.5 I saw figures of approx 260 - 270 bhp/lb ft at Power Engineering.

I also have a Dawes MBC set to 1.25 bar.

 

Hi,
What i meant was but did'nt put was to use optimax and OB all the time from remap on.

Does it give you a new car feeling or were you already running more boost.

Cheers for reply

 

Seems a bit daft to me to get a car mapped on Optimax and OB. Use OB by all means but I'd have it mapped on just Optimax. That way you have a bit of safety margin if you get a duff tank of fuel or if you can't find a Shell garage and have to use SUL or maybe even NUL (obviously with a big dose of OB).

Always been a bit of a concern of mine regarding re-maps, I would like to get mine done as some point soon, but I have sometimes found myself in the wilds of Scotland or similar running low on fuel and no SUL for hundreds of miles around. I guess a car mapped for Optimax would be just about okay on NUL with a good spalsh of OB, obviously a close eye would be kept on the KnockLink.

 

Agree with Graz.

Can't really comment on the 'new car' feeling as mine was running at 245 bhp prior to the map. The torque did make a considerable leap forward though.

It is definitely going to be worth your while though - I can’t imagine you'll be disappointed with the gains.

 

I would add the decat centre section and forget about the OB.

 

Agree with the above

Get it mapped in the state you are going to run it in so if you don't want to be spending extra on OB all the time leave it out when getting it mapped.

 

best make sure that you have had a fair few tank fulls of your chosen fuel before remap as well.
just in case there is redsidual OB or other fuel in the tank.
you want to make sure that (for example) you only have pure optimax in your tank.

 

i've got a TEK2 and it was done using ngk 6's, was told there's no real need to go to the extra expense of the 7's. comes down to personal choice i suppose, not to sure of the benifits TBH.

as said, get it mapped for optimax and forget the OB. i was told if i get caught out between shell garages, put in a little of the highest RON rated fuel available and drive as much off boost as possible untill you get to the good stuff again.

as for the centre cat, you'll be best off asking the mappers advice as to the gains. MOT emissions will fail on full decat but with the centre cat it'll sail thru. if you can't be arsed to change it each year it may be better for you to leave it in place?

my uk 99 with TEK2, full decat and green panel filter got 270bhp/265lb.ft torque at PE. mapped to 17 PSI. well worth doing

 

Present your car for mapping in good working order and have it in the condition you intend to run it on the road, day to day. So get any mods that you intend in the next 12 mths done before you go for mapping.
Run the fuel you intend to run from now on and have it in the car as of now, just like Peanuts says. If you are going to run NF you will get a performance benefit as you can run more advance but it means you have to use NF from now on unless you are caught out and remain off boost.
Turn up for mapping with plenty fuel on board and enjoy.

 

Thanks for all the input and advice guys,apprieciate it.

I am going to decat the centre and put ob in as i only use it as a toy and do less than 2k a year in it so filling up with ob from now on is no prob and if i will get more from remap its a bonus and as harvey says i will drive off boost if not available for any reason,you dont have to floor it all the time with max boost.

I was wondering about the plugs as the 6's i re gapped were quite worn with only 14k on them,Certainly would'nt do over 40 as manual suggests,so thought the 7's would handle more boost and heat better.

What OB has a proven benefit?

Cheers Paul

 

NF is regarded as the best available without brewing your own.
be very sure about the OB with remap.
It may seem tempting to try to get every last ounce of power available, thats true.
But you need to look at remapping as a reduction in your safety zone, albeit a safe one.
When an Impreza leaves the factory it has to meet certain regulations, as well as be reliable enough for Subaru/IM to be able to offer a full 3 year warrenty.
So they have huge tolerances and a massive margin for safety, they want to make sure that as few a number of cars require warrenty work as possible.
And who wouldnt in their shoes?

What you do with remapping is effectively trim that margin down to be able to run that bit harder/faster/stronger.
More boost, more ignition advance, leaner fuelling where possible.

Leaving yourself a little extra margin over the map (i.e. Octane Booster) means you have something to fall back on should you get a bad shot of fuel one day or something.
remember also that because your mileage is so small that a tank will last you quite a while so you will be stuck with running off boost until you can get a good dose in.
its not just staying off boost at cruise either, what about m'way 5th gear cruising and you have to accelerate for some reason? You will see on your knock sensor how the car reacts to that.
Having the extra RON available in a bottle in the boot is a great relief.

Its not too much about cost (although it is a consideration to many), its more about leaving yourself a lilttle bit extra, should the need arise.

of course its your choice and all that above could be pish.

 

I know what your saying mate,

i drive like a granny most of the time and want the extra to be there when it's needed and have never seen more than 2 green on the KL even with Just UL in,Will speak with mapper about OB to see how much more i will get with it in.

Cheers Mate