[Diy_efi] sequential injection timing

[bill.shurvinton at nokia.com]

Sorry for delay. Been trying (and failing) to get the answers you need.

http://hometown.aol.com/dvandrews/kengine.htm is the best single site =
for showing some of the ins and outs of how daft people will go for an =
extra 10HP. Dave is considered to be one of the best head porters in the =
UK, at least for 4-pot engines. One of the highest HP K series out there =
is one of his and has only blown up twice IIRC. (aside: said owner of =
said 250BHP monster now limits to 8300RPM on the track to preserve his =
engine as he cannot afford to destroy it. IMHO this constitutes losing =
the plot)

Dyno runs on these cars are almost exlusively done by Dave Walker at =
Emerald. He uses a Sun rolling road and does full coast down =
compensation to come up with the quoted power figures. He tends to view =
injector timing as an emissions issue and nothing to do with power if =
you read his books and articles. He is also willing to try most things =
to see if they help.=20

Bill

-----Original Message-----
From: ext Mark Claywell [mailto:clay0052 at umn.edu]
Sent: 31 July 2002 01:08
To: diy_efi at diy-efi.org; diy_efi at diy-efi.org
Subject: Re: [Diy_efi] sequential injection timing


On 30 Jul 2002, William Shurvinton wrote:
> Does a 1.8l NA engine producing 230+BHP at 9000 RPM count?

I suppose. What is the port configuration like? How are the injectors
mounted? What pressure are they running? Might be that no matter what, =
it
might never care much what injector timing it has.=20

If it is batch fired, ya, EOI is going to matter a whole lot less, as =
you
are not injecting all at once.=20

However, I would like to ask a few questions first, if I may. Is this =
being
tuned on a steady state dyno or on a roller dyno? Have you tried =
multiple
pressures? How much time did you spend investigating EOI timings for
sequential injection?=20

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