[Diy_efi] New project

[Eck, Joel (Houston)]

you're building a harmonic, so to speak.

-----Original Message-----
From: Derek [mailto:derek_obanion at yahoo.com]
Sent: Friday, November 22, 2002 1:52 AM
To: diy_efi at diy-efi.org
Subject: Re: [Diy_efi] New project


> BMW claims they can achieve greater than 100% VE on their M3 class
> engines for a sizable upper part of their rev range - amazing what
> intake tuning can achieve !

I am noticed something like this on my car (94 Turbo Supra). The intake =
manifold
has been modified. Opened up, internal idle motor and EGT passages =
ground off,
new top welded on increasing plenum volume by about 10-20%, and fully =
extrude
honed. I seem to get this weird spike in VE at around 2800-3000RPM. To =
get a
consistent air fuel ratio in that area, I have to add 5-8% more fuel in, =
then
take it back by 3250RPM from what a normal smooth VE curve vs RPM would =
look
like. Weird.


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