[DeTomaso] Re : [De Tomaso] Summit carb
richard bosch
theemonkey at yahoo.com
Wed Aug 7 20:10:18 EDT 2013
Mike,thank you for following up on the carb.I will post this to the forum as the more information the better.
Thanks,Richard
________________________________
From: Mike Gilmore <mgilmore11 at mchsi.com>
To: richard bosch <theemonkey at yahoo.com>
Sent: Monday, August 5, 2013 3:46 PM
Subject: Re: [DeTomaso] Re : [De Tomaso] Summit carb
Hi Again, Richard. I talked with one of my carburetor guru buddies today,
he thinks Holley has revised the fuel passages, for the “Summit” named carbs.
Probably a call to the Holley tech support line , could confirm this , and if
so, exactly what they did to revamp the 4010/4011 series carbs. You can repost
this the to net, if you want to. Thanks! mike gilmore, 1984, GT-5.
From: richard bosch
Sent: Monday, August 05, 2013 4:46 PM
To: Mike Gilmore ; detomaso mail list
Subject: Re: [DeTomaso] Re : [De Tomaso] Summit
carb
Good information to know.Going lean when you really need it at the
higher rpm's is bad!I did not have that as problem with the Summit carb i had,
as the 302 was just a stock 5.0L HO roller motor out of a lincoln at the
time.With the supercharger on there now,lean is where parts go Kablooey.Now i
have a special modified(power valve referenced to the intake) Holley for use on
roots type blowers and it is actually running on the rich side.Waiting for my
new headers with O2 sensors to dial it in.
I
will post this to the forum so others can see as it may prevent a lean engine
problem from happening.
Thanks,Richard
________________________________
From: Mike
Gilmore <mgilmore11 at mchsi.com>
To: richard bosch
<theemonkey at yahoo.com>
Sent: Sunday, August 4, 2013 3:03
PM
Subject: Re: [DeTomaso] Re :
[De Tomaso] Summit carb
Hi Richard! The original Holley design of the
4011 series carbs, was a good
unit for everyday driving, but they were short
on delivery on the big end,
for all out performance. Remember reading in Hot
Rod magazine, after they
had been in production for several years, Holley
annouced they were going to
revise the fuel passages in the carbs, for
better top end use, but, shortly
after that, they discontinued the entire
series, it included 600, 650, 750,
and 800 cfm carbs. I do NOT know if
Summit had those intended revisions
done, orjust had Holley start
remaking the carburetors, with their name on
them. If you want to repost
this to the net, that would be fine. Best
regards, mike gilmore, 1984 GT-5.
-----Original Message-----
From: richard bosch
Sent: Sunday, August 04,
2013 10:52 AM
To: detomaso mail list
Subject: [DeTomaso] Re : [De Tomaso]
Summit carb
Mikael,
I had the Summit carb on my mustang before i
put the supercharger on it and
it was as you said an excellent
carb.
I did have a heat soak problem with it after the car had been
parked for 30
minutes or so after driving it.I cured it by using a phenolic
spacer.So the
aluminum carbs still have the same problems with heat as
normal Holleys.At
least for me it did.
For what its worth the Summit
carb is actually a Holley design from the late
1980's.I think if i recall
correctly they were the 4010 and 4011
series.Unfortunately they had very
poor sales so they stopped selling them.I
am happy that summit sells them as
they are a good carb.Lighter than regular
Holley's as
well!
Richard
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