A piggyback ecu will override the factory ecu. it will also provide the fuel cut function too.
I dont think those bosch BOVs can hold much more than 1 bar boost. zac ----- Original Message ----- From: <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Thursday, May 02, 2002 8:35 AM Subject: Re: DIY Fuel Cut Defender > The factory ECU's are better than the aftermarket ones. > You have lots of factory tested, high resolution maps,limp home mode, compensation for sensor fail etc, etc.. And they are free (or not much extra) with the half-cut. > The only thing they lack is those high boost maps and the ability to run bigger injectors. > > I thought a unichip or other piggyback ECU with FCD could be used for the high boost areas. > > But if it is going to cost more than $500 + the frigging around, I agree you are better buying an aftermarket ECU for >$1K > > Do the Porsche BOV's hold more than 20psi without leaking? > Do you know how much they cost? > > Nick > > > > From: Tony Bryant <[EMAIL PROTECTED]> > > Subject: Re: DIY Fuel Cut Defender > > Date: 01/05/2002 17:59:52 > > To: [EMAIL PROTECTED] > > > > > > > Questions.... > > > How do you compensate the A/F ratio 'properly' for the extra boost with the > > > FCD? Do factory FCD's compensate for this lean-out at high boost. > > > A rising rate pressure regulator seems a bit dodgy(?) > > > Will a 'piggy-back' uni-chip fit the bill? how much do these cost? What > > > about re-programming if you upgrade after the initial installation? > > > > I'd rather not stuff about with the factory ECU, if the factory ECU won't > > do the job. Go buy a Haltech or Wolf or whatever and do it properly. Anything > > else is a hack job. > > > > e.g. A FCD won't retard timing to suit the extra boost. > > > > > > > > I am also looking into the bosch (Porsche, audi) BOV. how much do they > > > cost? Do they perform as well as the polished doof-doof ones? > > > > I know a bunch of knowledgable Supra people who all run them. They're cheap, > > reliable and they work well - and If you're a grown up you'll appreciate the > > (relative) silence. > > > > > > This message was sent through MyMail http://www.mymail.com.au > > > --membersozdat------------------------------------------------------- OZDAT Mailing List Please Note:- Send (un)subscribe requests to [EMAIL PROTECTED] Send submissions to [EMAIL PROTECTED] No unauthorised redistribution of this email http://www.ozdat.com/ozdatonline/index.htm http://www.ozdat.com/ozdatonline/listindex.html http://www.mail-archive.com/[email protected]/ ---------------------------------------------------------------------
