[DeTomaso] EFI for 351 clevland

[Will Kooiman]

I put Webers on my car earlier this year.

I switched to 42mm chokes (stock is 37mm).  Other than that, they're the way
they came.  I have some jets, but I haven't had a chance to try them yet.

My gas mileage dropped from about 19 mpg to about 15 mpg.  Right now they're
making 0 mpg.  They don't work so well on 7 cylinders.

They poofed black smoke if you pulled the throttle open real fast, so I'm
sure they're quite a bit too rich.

I didn't have any weird flat spots, but that's probably what you'd expect
with it too fat.

The linkage is a pain to get worked out.  The same would be true with EFI.
The linkage that Mike Trusty is providing is perfect.  You can see it on
Kirby or Mad Dawg's website.  The linkage you get from the Weber vendors is
tinker toys.

I'll get it back together later this year.  When I do, I'll do a write-up on
my Weber tuning experiences.  I plan on putting it on a dyno with Webers and
later with a Holley.  Target date is late Nov.

Will.

-----Original Message-----
From: detomaso-bounces at realbig.com [mailto:detomaso-bounces at realbig.com] On
Behalf Of JDeRyke at aol.com
Sent: Monday, September 29, 2008 2:32 PM
To: larry at ohiotimecorp.com; detomaso at realbig.com
Subject: Re: [DeTomaso] EFI for 351 clevland

Like Larry, I've adapted Webers to various cars. The simplest took me 6 
months to sort out reasonably well. I sold that set and was never able to
duplicate 
them again for my own use, in spite of copious notes and lots of spare
parts.
Non-facetious Rule of Thumb 1: its easy to add Weber carbs (at great
expense) 
to any engine. Then without tuning, what you get is either extra power and 
half the fuel mileage you had before, or great mileage and less power than
your 
OEM carb(s) gave you. Pro Weber tuners make pretty good bucks sorting out 
these complicated devices. Some tuners are better than others and you find
this 
out also at great expense. 
Second rule: there are five fuel jets, two air bleeds and a fuel metering 
(emulsion) tube, per barrel, all replaceable. All interact with and affect
each 
other. There is often only one combination that works properly. A typical
V-8 
has four double-barrel carbs. The cheapest replaceable part is around $5.
You 
do the math.
Third Rule: it is really easy to get lost in the possiblities while tuning 
Webers, and each mistake costs you.   That's why there are quite a few
untuned 
or poorly tuned Weber-equipped cars around- most driven slowly or seldom.
Oh, 
and once tuned, minor altitude or weather changes or in some cases, a cloud 
passing overhead is enough to foul up the good running. You learn to carry a
kit 
of tools and jets with you. 
Aftermarket EFI is pretty much the same, except that altitude doesn't affect

it and your hands don't stink of gasoline after a tuning session. But 
carpal-tunnel syndrome or a ticket for text-messaging while tuning/driving
is a 
possibility. Both really require several dyno runs to properly finish-tune.
With 
either conversion, you (or your engine) will not likely live long enough to
see 
any net fuel savings. But they do look nice and for some owners, that's
enough. 
Good luck- J DeRyke


**************
Looking for simple solutions to your 
real-life financial challenges?  Check out WalletPop for the latest news and

information, tips and calculators.
      
(http://www.walletpop.com/?NCID=emlcntuswall00000001)
_______________________________________________

Detomaso Forum Managed by POCA

Archive Search Engine Now Available at http://www.realbig.com/detomaso/

DeTomaso mailing list
DeTomaso at list.realbig.com
http://list.realbig.com/mailman/listinfo/detomaso