Josh Able: puny fuel injectors

[amalventano1@comcast.net (Allyn)]

josh, dont get steamed about those questions scottie is askin ya, we're actually lookin our for ya,
because honeslty, eurospeed should have put bigger injectors in there. i think they are cutting a
dangerous corner with your ride (and money). you have near-0 margin to leanness when running wide
open. the slighest injector clog/fuel pressure dip/etc will quickly lead to blowing holes in
pistons/ring lands. using bigger injectors doesnt make it run rich, since the map (if properly
programmed) would just keep the injector open for a shorter duration.

also, look at this chart (half way down the page), granted its DSM specific, it will give you an
idea of what those guys do for injectors:
http://www.roadraceengineering.com/eclfuel.htm
also keep in mind that stock dsm inejctors are in the high 300cc range. the factory fits those cars
with near 400cc injectors and they are only rated for 200 hp.

Al

Allyn Malventano, ETC(SS), USN
87 Rieger GTO Scirocco 16v (daily driver, 180k, rocco #6)
86 Kamei Twin 16V Turbo Scirocco GTX ('it has begun', rocco #7)
86.5 Occo 16v Trailer (dotting 'i's across the country, rocco #8)
87 Jetta 8v Wolfsburg 2dr (daily driver, 260k, 0 rattles, original clutch, driveshafts, wheels :)

----- Original Message -----
From: "Scott F. Williams" <sfwilliams@comcast.net>
To: "Josh Able" <mkii@nycap.rr.com>; <scirocco-l@scirocco.org>
Sent: Tuesday, June 11, 2002 4:10 PM
Subject: RE: Josh Able: puny fuel injectors


> > its about 75% which is ok.
>
> Actually, your engine builder, Eurospeed Ltd., told me that you're well
> beyond .75. Something upwards of .9 is more like it per their estimation.
> They were confident that this is safe, but I adamently disagree with the
> method. Those things are a) going to fail, and b) can not be controlled
> reliably. Thus, your fuel delivery is likely to be inconsistent while it is
> working at all. All this spells trouble.
>
> > Anyways, if I went with bigger injectors the car would run even
> > richer, and I would have to get my chip redone.
>
> By no means will the car run any richer if the chip is programmed correctly.
> Why did they take the shortcut that they did with those little injectors,
> anyway? If they were going to remap your ECU to handle the 310cc that you've
> got, couldn't they just as easily have programmed for a more appropriate
> size? Or... (shudder) has your ECU been left stock? Yikes.
>
> I am so totally intrigued by this set up. The word "why" keeps coming to
> mind again and again. :^)
> --
> Scott F. Williams
> NJ Scirocco nut
> '99 Subaru Impreza 2.5 RS
> Mazda 323 GTX turbo "assaulted" vehicle
> Golf GTI 16v "rollycar"
> ClubVAC: "Roads found. Drivers wanted."
>
>
>
> _______________________________________________
> Scirocco-l mailing list
> Scirocco-l@scirocco.org
> http://neubayern.net/mailman/listinfo/scirocco-l