Different animal, Tony. Webers and similar fixed choke carbs work differently
than CD carbs like Strombergs and SUs.
Keith Frank is the Weber jet developer Sarto is referring to, and in my
conversations with him over the years he has indicated that he is not a ZS
expert. Are you having problems with your carbs?
Greg Tatarian
Elan S4
Sent via BlackBerry by AT&T
-----Original Message-----
From: Tony Korman <tonykorman@sbcglobal.net>
Date: Mon, 22 Feb 2010 19:41:05
To: North Bay British Car Club<nobbc@autox.team.net>
Subject: Re: [Nobbc] Lotus owners with webers
Can whoever did it do Strombergs
Sent from my iPhone
On Feb 21, 2010, at 12:53 AM, Sarto Rocheleau <sarto477@yahoo.com>
wrote:
> Hello All---
> I want to make an announcement that as of today, I now have
> perfectly tuned
> 151 webers. No bucking, no flat spots, smooth at idle to wide open.
> It pulls,
> in all gears, like it had 15 more HP. and when it hit 4,500 rpm it
> had a surge
> of new power. Hard to believe, an old friend, Keith Franck, after
> years of
> research, has re-engineered the E-tubes and hypojets to perfection.
> What he
> has done to webers is quite scientific and over my head so I copied
> a post
> below of some of the details from Keith's site.
> Sarto
>
>> Re: Sarto's Tuneup
>> He already had my experimental e-tubes that were 8.35mm in diameter
>> so the
> impedance is okay. Next we found the front carb had the fuel level
> set too
> high by 1mm so we lowered it back down to 25mm. The first set of
> hypojets to
> get installed were .020" ones and when the rpms was elevated using
> the idle
> speed screw it got hung at about 2000rpms and it was spitting,
> that's a dead
> giveaway clue it's too lean! The stock idlejets were 45 something so
> next we
> stuck in .026" hypojets. That did the trick, it immediately revved
> up and down
> like a sewing machine. Went for a test drive and it runs absolutely
> flawlessly. The only issue to resolve is whether or not it needs
> apertures in
> the first progressive holes because it did exhibit symptoms of
> having a lazy
> idle. Sarto installed a set of temporary apertures and just drove
> off to test
> if those will in fact make the slight lazy idle symptom go away.
> Depending on
> how that goes will determine if we need to glue in
> the permanent apertures or not.
>> -Keith Franck
>>
> He did not need the apertures after all, reducing the idle speed a
> tad is all
> it took to stop the lazy idle symptom. Gave him some of the 1mm and
> 2mm
> spacers to elevate the e-tubes to test later on. He left to go over
> to Mike
> Ostrov's to have Mike see the results firsthand. It runs like sewing
> machine
> is the best way I can describe it but also hauls ass when you want
> too.
>
> We did the tuning without using an AFM. Only tuned it at this
> juncture to get
> the tractability perfect. I might be able to improve the fuel
> mileage a bit
> more but he needs to drive it to determine what it's getting now.
> -Keith
> One thing that is becoming obvious to me is the 151 carb responds to
> my
> jetting in a spectacular fashion. The improvement is pronounced
> enough that
> I'm seriously considering shelving my original 18s and go buy some
> new 151s
> with three progressive holes. I have no idea why this is the case
> but it's for
> real.
> -Keith Franck
> Mike Ostrov drove my Elan and confirmed that it runs like no other
> Elan with
> webers.
> A new day for webers
> Sarto
> _________________
> lotus elan 1966 S3 FHC
> 36/5785
> LHD
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