Glad to hear your experience with Webers turned out well. I spent a
weekend
at the Monterey Pre-Historics helping a friend tune a pair of 45 DCOE
side
draft carbs. We got it to run, but they were not is good shape and he
ended
up replacing them with new units. I understand that is quite
difficult now.
Wendell
On Feb 20, 2010, at 10:53 PM, Sarto Rocheleau 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
> _______________________________________________
> Nobbc mailing list
> Nobbc@autox.team.net
> http://autox.team.net/mailman/listinfo/nobbc
_______________________________________________
Nobbc mailing list
Nobbc@autox.team.net
http://autox.team.net/mailman/listinfo/nobbc
|