[Diy_efi] was - Air fuel meters - now turbos and such

[Gianmarco Rizzo BE/EAS]

Hi

well i have seen some exceptions. a friend of mine has modified a delta evo1 with a pretty good exhaust manifold, a proper exhaist system and some other minor mods and there is positive boost starting from 1800rpm, max boost arrives at 2800 and doesnt buckle until max rpm at 6500

however, the boost pressure is electronically managed, and reaches the max in terms of pressure between 2800 and 4500 rpm, then slowly decreases to protect the engine.



> -----Original Message-----
> From: diy_efi-bounces at diy-efi.org [mailto:diy_efi-bounces at diy-efi.org]
> Sent: Freitag, 15. April 2005 04:03
> To: diy_efi at diy-efi.org
> Subject: Re: [Diy_efi] Air fuel meters
> 
> 
> >From my little experience, without some sort of boost 
> pressure relief, 
> turbos can be sized for power from X RPM to 2X RPM. That is, 
> if it starts at 
> 2300, it's done at 4600 and if it starts at 3500, it's good 
> to 7000 RPM. Of 
> course, everyone will have an exception.  TomS one exception 
> is the dual 
> in-line turbo setups.
> ----- Original Message ----- 
> From: "Gianmarco Rizzo (BE/EAS)" <gianmarco.rizzo at ericsson.com>
> To: <diy_efi at diy-efi.org>
> Sent: Thursday, April 14, 2005 3:10 PM
> Subject: RE: [Diy_efi] Air fuel meters
> 
> 
> > yes i agree
> >
> > i owned a 91 delta integrale evo, with a large T3 turbo 
> (large for a 
> > 2litre engine). there was no boost under 3500rpm but the TC 
> was good for 
> > up to 300 bhp. power rush was amazing, but guidability 
> heavily affected. 
> > really required skill to go fast on corners.
> >
> > on the 94 model they reverted to using a smaller TC (no 
> need to build the 
> > car with such large TC because of the homologation 
> requirement to race the 
> > car in WRC), positive boost arrives ar 2300 rpm, and car is 
> much more 
> > guidable on the twisted stuff. however the TC runs out of 
> puff at around 
> > 250bhp.
> >
> > still, i prefer a more guidable car than a moster with a 
> very narrow 
> > powerband.
> >
> > 
> 
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