not sure but 1.75 is plenty for me

matt-c's syvecs on his hatch didn't ,as he couldn't get cruise control without paying more for a add on and had other issues that id rather not say about on a open forum

lots of money and when its not needed :thumb:,, I waste my money on my WRC build not my road car lol

Please enlighten domino46, Ive been told all will be fine, was matt-c's the s6+?
I have in an email this ecu will work perfectly fine with cruise, I needed to go with plus for it! If I'd doesn't It will come off!
If you would rather pm please do

that seems to be very low boost to make 530?
with the syvecs if you wanted to go all out tommorow ,new injectors ,MAF delete and 2 bar boost and you could add 50bhp out of your roadcar .horses for courses

With syvecs I'm led to believe you can run both MAF and speed density. So normal driving maf boosting it automatically goes over.

Don't hold me to that but sure I've been told that

this may have been sorted since I last spoke to him as it was a while ago and they were looking into it but he def had issues that stopped me buying one

but why risk running 2 bar out of my 2.5 just for a extra 50bhp ? ,, would be easier to either mix with meth or add a water/meth injection kit

but again the question is why ?????????

I wanted 500 so why on earth would I be worried about spending all that money on a ecu thats not needed for a extra 50 bhp I don't want :cuckoo:

why bother with a maf? Not needed

Not sure what this is referring to, but never had any issues with Syvecs, cruise was never intended or attempted to be set up.

Lots of money "wasted"? That's just normal enthusiast owning a modified car and wanting the best for it isn't it :luxhello:

Syvecs will do everything the standard ecu will do, that includes cruise control.

i wouldn't be happy running 500+ and removing some of the safety features thats for sure.

It will do it, yes, as long as you have spare inputs to control it. Which i don't, as Dom said, in my particular case i would need an expander unit.

MAF gives a better drivability off boost

Are you running 500+???

ah right, as you say just get the expander unit then :)

mines totaly fine off boost and i don't have a maf on the car at all. Only time it would use the maf is at idle anyway :S

not at the min but will be as soon as i have the cash for the larger turbo, everythign else is there ready hahaha

The issues is around the ecu and what it can actually see, mainly the upper limit of boost it can see so apply saftey cut features to.

I work on bob rawle's advice my own experience and how the car drives and its fine , I regularly check everything and haven't had any problems running the power I have though the standard ecu ,bob rawle also ran the same ecu and setup on his own car as I have on mine (I copied most of his set up) so bob rawle must be doing it all wrong ,,, ill have to tell him he is getting all his hatchback customers cars wrong and making them unsafe for us to drive lol,,,funny that iv never had any problems with the current set up for the last couple of years lol

I think bobs exact words when I asked him about after market ECU's for the hatchback was , the standard ecu is more than capable for what I'm after , and he is right as iv got exactly what I want and haven't spent money I didn't need to

not having a go this is just my thoughts on the subject , each to there own , I'm out of here ;)

This is spot on, the reason I asked the question above - are you running 500+? - was if not, then how can you comment on something you have no experience of.

I know you've been running 500+ for a long time on your hatch on the std Ecuador with no problems so there's no ifs or buts, it works and works well. Like you state why bother spending x amount of ££££'s when you have what you need.

I know because I have asked alot of questions over the past 18 months. When my engine went it was replace from crank and block up to run 550. That also included everything around it including the ecu, it's capabilities and it's limits.

I do find it interesting that people are using carberry to have their car maps not realising it disables the cars immobiliser. Not that it's the case here, it's just an example of limitations of the standard ecu.

Not sure what Carberry is?!
There is certain things that can be done for syvecs to be "immobilised"
The greatest thing for me why I'm going syvecs is the safety features it has and does which is far superior to the std ecu.
Don't get me wrong as I've already said the std ecu is more than capable.

But syvecs monitors oil pressure and can drop to idle the second it sees something it doesn't like
Fuel pressure the same
Det it has enhanced knock monitoring (mapped properly it shouldn't have det, you say) it's brilliant that the quality of fuel is accurate every time or we never get a too hot or too cold day.
It's horses for courses tbh. Happy spending the little extra knowing my engine will be protected as much as I can.

what car do you own tidgy? iv been asking bob these sorts of questions for the last 10-12 years and have built loads of high spec Subarus in that time with bobs advice for what ecus to run including many aftermarket ones when needed ,, I trust what bob tells me and what I see with my own eyes over what you have been told in the last 18 months , no offence intended

Arse cock and bell end. Wrote a nice long reply and it logged me out! grrr, shall try again.

No offence taken so no worries, makes a change for decent tech debate rather than a slagging match :thumb:

It's interesting how i've been asking people the same questions and getting different responses.

The Issue i have witht he standard ecu is the limitations of the boost levels it can actualy see and how it struggles to cope with the mass of larger turbo's due to running the MAF.

My old car was a 06 Hawk runing 390/415. Spec was a Forged bottom end, single AVCS heads, usual larger injectors and fuel pump etc running an SC46+ (as it was at the time).(graph below for ref) Was held back to preserve the gearbox and only running a top mount hence on limited boost.

Attachment 26049

You can see on the boost/afr graph it struggles to cope with applying fueling as the turbo comes in,

Attachment 26050

But it also created drivability issues. The mass of the turbo was just too much so coming down to stop the idle would hunt and occasional drop so low the car stalled (this is MAF related). This was fixed by rasing the idle, but its more of a cover up than an actual solution (iirc was set to around 1100 or 1200 rpm, but were going back a few years now and i;ve slept since then lol) when you want it to run like an OEM car. You can also see on the graph that its a bit wavey (i'll come back to why this matters in a bit)

So jump forward a few years and im now driving a v5 Type R with a closed deck converted, forged 2.5, rebuilt v5 heads and all the associated trimmings (injectors, fuel pump, etc etc etc) a custom GT2871R Billet turbo pushing around 2bar on a syvecs ecu.

First off the stock ECU couldn't see that amount of boost so would be playing best guess and would have removed the fuel and boost cuts. you cn also see from the graph how much smoother the curves are. You also mentioned retaining the MAF for off boost drivability. I'm running a syvecs and there isnt even a MAF sensor in my engine bay, yet it drives tootling around like it did when it was running a 2.0 on stock ecu. Some ecu's have to retain the MAF for idle reasons, however syvecs has closed loop so it gets given the full bin treatment.The graph is also alot smoother (as per previous comment)

Attachment 26051

Also add in some of the other features, like syvecs cranks a few cycles to make sure sensors are aligned before it fires your building in the saftey.

iv not had any of these issues with either my last 380bhp hawk or my current 531bhp hatch , holds boost fine and never stalls or hunts , my hatch is set to 1.75 bar , iv spoken to bob about putting bigger turbo on and running around 600 like he was from the same set up and it wasn't a issue

here is one of my graphs but can't find others with my my fueling ones for some reason


https://cimg3.ibsrv.net/gimg/www.sco...ccaecb72d8.jpg

531 in a hatch :eek2:. Must be a monster. Alot of time and effort has been put into that :norty: