It's a tough choice given the cost difference, I'm going for absolute minimum lag and i'm not sure just how good the Daws is.

Car spec is. MY99 WRX uk model

VF 35 turbo
APS top mount
HKS induction kit
Full De-cat from new up-pipe back
HKS SSQV
Other required basics of course

I intend to get it re-mapped and run around 18psi boost possibly with water spray.

Everything is ready my last part now is the boost controller good advice would be welcome. I plan to order today so help please.

Oh and you bunch of b******* i was happy with my DV and indution kit before i found scoobynet!

 

For spool, I suspect you will find no better than the Dawes, but it's not very controllable - too on/off for my liking. Depends on your driving style.
The AVC-R is going to be the best of any other system IMHO, although the spool may well be later - marginally - and it's a complete $%&%^£"^%$ to set up, I suspect long-term you'd be a lot happier with it! The marginal compromise on spool will IMHO be outweighed by the better boost control it will give.
I'd go for the AVC-R, but you may want to try a Dawes first as it is cheap and the Apexi unit isn't!

 

Cheers, What exactly is involved in setting up the AVC-R. I take it that it gets difficult after the mechanicals are done(of wiring it up)?

Can you also use a high/low boost without messing up mapping? I'm afraid my knowlege of ecu tuning is very limited.

 

Could´nt you go for a combo of the two, set the Dawes to low boost and use it for fast spool up and then let the AVR-C take over from there? I don´t think that you will find any faster spool-up than the Dawes.

 

I did hear that it was possibe with good results, however for 'only' 320-340bhp and 18psi i doubt it would make that much difference

 

I don't think you'd really need the Dawes for fiddling with the boost - any improvement would likely be minimal.
Yup, you can choose high or low boost from in the car. There's a 'scramble' mode that allows higher boost than normal for a set period of time as well. The unit is 'self learning' once vaguely the right numbers have been fed in, but this isn't as accurate/repeatable as manually doing it the whole way. Then there's each gear to cater for as well, for their different characteristics...
This is when things begin to get complicated

 

If by MY99 WRX UK model you mean AE800 or AE801 ECU, then there is a flash ROM for AE801 which can be applied to any MY99/00 UK turbo when it is being mapped. This takes "acceleration" (so highest in lower gears) and uses it instead of the defunct IAT comp to tweak up the maximum duty cycle. In English that means full boost in almost every gear with a 3 port solenoid. I tended not to use it that much except on my own car because of the risk to the gearbox (and I broke a gearbox using it with a TD05 at 1.5 bar in 3rd gear within a few days). It was also called "clutch killer" for a good reason.

 

The Apexi AVC-R is capable of excellent boost control in EVERY gear !
It's just a matter of correct set up.
The Dawes does give excellent spool up although the AVC-R can match it no problem.
Where the AVC-R scores is that it will hold boost better as the RPM increases, the Dawes can reduce boost as rpm increases due to the effects of exhaust pressure on the wastegate.

The AVC-R can also run 2 independant maps (yours/wifes ) and it can have a tailored curve to suit your spec ie more midrange pull or more top end. You can bring the boost in progressively or with a bang

Andy

[Edited by Andy.F - 10/13/2003 11:36:15 PM]

 

ok...can anybody be so kind and post some numbers for setting up avc-r for us newbees...like for example what should be targeted boost values by gears and for at least one gear...my goal is to rise boost (my98) from 0,9 to 1,2 with avc-r and since car runs with td04 i think top (above 6k rpm) strenght is limited so midrange is main target and faster spool..so please,numbers where do you start (2k rpm?) and how do you progress trough revs would be very nice...thanks upfront

 

OK, AVC-R is on the way. Are you busy this month john as i'm just about ready for re-mapping. If i remember rightly i dont need a fuel cut defender if you do the mapping?

 

Does the AVC-R only adjust the boost? Having it all electronic it seems too easy to lean it out as fuelling is not being altered, hence the popularity of ECUTEK re-maps.

Damian.

 

Yup, it's just a boost controller.
To a point, the standard ECU will cope with fuelling - it just needs to be kept a good eye on, and ensure using quality fuel to ensure any potential problem with the raised boost is minimised (really quite important with the tiddly TD04 & TMIC!)

 

CeeDee

I would not attempt to set your AVC-R up via email/bbs. There are so many variables from one car to the next that it would be almost impossible to do without either major risk or a very conservative programme.
Even 2 cars same model, same year are likely to need different set ups.
Just ask the guys that do the scooby ECU mail order, 2 identical cars can give completely different results.

regards

Andy

 

2 Andy : ofcourse i didn't meant exact copy will work...but some general points would be a good start...as i live in country that doesnt have 4wd capable dyno any info/numbers would be a good start point...as i wrote before...i don't need some silly boost but only 1,2b and i'm interested in seeing other peoples nubers how did they achive their boost goals..as for scoobyecu...i did have one and i would buy one in a sec if it was available for my98...
On the other side...friend of mine drive bugeye which boosts 2,25b with dealer guarantee on stock internals so 1,2b with AFR on spot shouldnt be impossible to achive for a day-to-day car..