Have just seen a ad for a HKS EVC IV and say's it is the best unit on the market...

What is the best one to buy and will it be able to control over the existing Fuel Cut by the ECU??

I have also seen the AVC-R which looks good too with its digital boost gauge etc.. Says it can also scramble the boost?

Any Suggestions Appreciated

Thanks
Scott
MY94 WRX with 1.1bar standard on standard ECU

[Edited by scoootie5 - 6/5/2002 10:14:06 PM]

Look out for a second hand Link and get your car remapped would be my suggestion. Safest and best performing. Boost is only a part of the equation.

Thanks for the reply John
Was thinking of a ECU replacment a while ago. Will any body fit and configure a second hand one though??

Thanks
Scott

you can bleed the vaccum line or put in a restrictor to the MAP sensor, same as what you can do to the waste gate actuator

Try a manual boost controller, such as my GBE controller:
www.grantbaker.co.uk

All the best
Grant

I've used an EVC IV on 2 previous cars (MR2 turbo, GTO twin turbo) and both times it was exceptionally good but both those cars have much more self adjustment and I didn't go mad with the boost.

I've read a lot of posts that suggest that the Impreza doesn't take too well to them. but I can't comment on that as this is my first Impreza and it's a MY01 which is even less able to cope.

This Link thing seems to keep popping up so I would guess it's well tried and tested. Only problem is you need someone to set it up for you and if they do that badly you could end up in worse shape.

Oh the trials we go through for more power. :)

Provided that you have sufficient fuel etc then the EVCIV is a very capable at controling boost. I have run one for 18months with no problems and no overboost issues.

My one concern, and one I feel I should've been told when purchasing said equipment is that it cannot be mapped to revs and throttle position so you cannot lower boost at higher revs which for me now is a major issue.

If you're not running stupidly high boost then it is a good piece of equipment. I've run mine at 1.2bar for the 18months that I've had it with lots of track miles. However now I'm running more boost I need to back it off at higher revs as I start to get knock at 5800rpm.

Remap your existing ecu via www.ecutek.com?

Richard

I think if I had my time again, I would have gone the ECU route.

I have a UK99 with standard turbo, fmic, prodrive ecu, full de-cat and the HKS evc iv. (running 1.3 bar)

I have read so many good things about ecu re-mapping, given that the ignition, fuelling and boost can all be taylored to suit a particular engine/set up makes it more of a bargain when you consider that the cost of a valve controller is very near the cost of an ECU re-map.

Have a think about it and do your homework, regards,MD.

MD, I hung onto my Prodrive gear for longer than was sensible with what I wanted to achieve. Getting a decent turbo along with your nice intercooler and a remap would be fab?

Sorry to hear that MD. I meant flogging a dead horse. Hope you get a position soon.

JB, thanks for that, that and that.

It shouldnt be too long in my work, just got to get my cv 'round a bit and see what happens.

Cheers for now.

I found the advantage with the EVC IV was that it adjusted to hold the boost you chose so if you do need to drop off boost higher up the revs then it won't be any use.

How does the ECU mod work? Is it faking the wastegate reading or is the wastegate adjusted by the ECU? Any turbo's I've had before required either faking the reading to the ECU or changing the wastegate.

Sorehead - that's 'cos you've not been able to write to the ecu in your previous cars ;)

An ecutek ecu remap (or any programmable replacement ecu - Link, Motec, Pectel, Gems) allows full customisation of boost, fuel and ignition parameters - anything fitted prior to fool the ecu into doing something it normally wouldn't should be removed before you start...this includes all EBC's, MBC's, FCD's, etc.

Rather than fooling the ecu to do something it normally wouldn't....you just tell it to do what you want....don't even need to open the bonnet, lol!

Richard

Please please please

Don't try and cheat an ECU. It's a bad idea on any car, but a really bad one on the scoobys.

There are so many different parameters involved in a turbo charged engine, and very little room for error.

Get the fueling or ignition timing wrong at high rpm or load and your engine can destroy itself in under a min. We've seen it. We've had to rebuild them after it's all gone wrong.

If you want to modify it - get a mappable ECU, and get someone who knows what they are doing to map it for you. This last bit is very important. The most expensive ECU in the world can still destroy an engine if mapped wrong.

Obviously we would recommend that you get us to do it for you, and would be more than happy to help. But please whatever you do, don't try and cheat with bleed valves or add on boost controllers etc - it could end up costing a lot more than you think!!

TEG Sport

But a Dawes and FCD is a *very* effective modification, cheap too :) I wouldn't say don't do it, just be careful.

Same as anything really, you should understand the principles behind what you're doing before playing.

Richard

But what about us poor neglected folk across the water from you that have nowhere to go to get these things configured? :(

Is there a way of doing it remotely or talking someone through it over the phone?

What model year do you have?

I don't suppose this sudden interest in MY is a possible approaching sale here for the EcuTek JB is it :rolleyes::D

Well they say you can't do anything for me, so I see if I can ;) ? :D Gotta pay for my FMIC (sorry didn't mean to say that ;) ) somehow :rolleyes: ;) This has all turned into a modify others' cars so I can modify mine more. Should not have bothered then everyone would be slow at the track ;) and we could have all just gone to the pub and not worried :)

FMIC... I new it!

I think that you have to John :D

It's a MY01 WRX (bought it in jan this year but I think it's a MY01)

Nothing to offer you for a few months yet then.

JB, you have just worried me!

"I hung onto my Prodrive gear for longer than was sensible with what I wanted to achieve."

By that do you mean that the engine was 'in danger' or just that you were flogging a dead horse?

I would predict that after you have fitted your new turbo in whatever form you go for, that the jb mobile WILL get a front mount...there is my prediction!

I have no chance of any mods at present, I have just been made redundant :( (only with company 9mnths so no money).

Oh well, there is ALWAYS someone else worse off.

Cheers all.

Edited to say thats why Im on here much more!

[Edited by Moles Dad - 7/10/2002 12:43:39 AM]