ECU tuning: was; The whole 1.8T puny injector debacle

[amalventano1@comcast.net (Allyn)]

yea, rising rate fpr is a good move on turbo cars. it takes manifold pressure changes out of the
equation, making map tuning *much* easier. twins most likely gettin em.
Al

----- Original Message ----- 
From: "Dan Bubb" <jdbubb@ix.netcom.com>
To: "Josh Able" <mkii@nycap.rr.com>
Cc: <scirocco-l@scirocco.org>
Sent: Saturday, June 15, 2002 6:45 PM
Subject: ECU tuning: was; The whole 1.8T puny injector debacle


> > The fact it blows allot of smoke is due in part to the 4bar, and that as
> > soon as I go WOT the gas pours in, but doesn't burn off till the turbo
> gets
> > spooled up.
> 
> If your engine management responds to manifold absolute pressure or mass air
> flow and not JUST throttle position (and really it has to since it's a
> turbo!) then there is no reason for a lot of black smoke. Your ECU only
> looks at MAP or MAF and RPM with corrections from other sensors. (such as
> TPS, air temp, coolant temp) So, there's nothing telling the ECU to dump gas
> in cause there's a bigassed turbo ready to come online. If the pressure or
> air flow isn't there the ECU responds to that. As soon as the pressure
> builds the ECU responds to that.
> 
> So, not wanting to be a dick and make you feel picked on; I'll guess your
> tuner just wanted to make sure you were way rich to guard against
> detonation.
> 
> But, probably the real reason is your tuner found it easier to just throw
> alot of fuel at the situation instead of tuning it right.
> 
> Also, one other comment. In my dealings with ATP, one of the vaunted 1.8T
> tuners, I've found they don't know shit about their products. They're
> offering a product at a nice price, but I'd be willing to bet their depth of
> internal combustion engine knowledge could be easily surpassed by several
> members on this list. It would be a cold day in hell before I'd buy a turbo
> system and chip from them for my A4.
> Not saying your chip is ATP. Just saying there are a lot of tuners that are
> just assembling piece parts without a real engineering knowledge of what
> they are doing.
> 
> As far as your injectors; are you sure your not running a rising rate FPR?
> There is a guy on Vortex, speed51133 or whatever, that at one time was up to
> 115 psi fuel pressure to use STOCK injectors with ~10 psi boost on a 2.0 8V.
> 190cc injectors and 190 whp!
> 
> 
> 
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