[DeTomaso] Great new brakes, but stalling when braking

Tomas Gunnarsson guson at home.se
Sun May 27 09:16:34 EDT 2012


Another problem is that when subject to tilt (which is the same as
braking/accelerating) fuel will flow through the main circuit and dump in
the carb throats at the venturi. No slosh tube will counter that.

Tomas

-----Original Message-----
From: detomaso-bounces at realbig.com
[mailto:detomaso-bounces at realbig.com]On Behalf Of bill gaino
Sent: den 27 maj 2012 15:02
To: Mikael; detomaso at realbig.com
Subject: Re: [DeTomaso] Great new brakes, but stalling when braking


Mikael, have you tried a "slosh tube"?  Cut a piece of fuel line and stick
it on each vent tube.  Some carbs have longer vent tubes, always keep an eye
out for them and aquire when you find them.This will form an arch over the
carb. Now cut a hole in the top of the tube to let air in. The idea is that
the fuel will slosh to the front bowl rather than dump into the carb opening
and flood. We used this simple setup drag racing.  Try that.  Bill 1362

-----Original Message-----
>From: Mikael <mikael_hass at mail.tele.dk>
>Sent: May 27, 2012 5:03 AM
>To: detomaso at realbig.com
>Subject: [DeTomaso] Great new brakes, but stalling when braking
>
>First, let me explain why I know I have this problem. I've installed Dennis
>Quella Willwood brakes this winter, and they definitely work. So I've
>probably made more hard stops than ever. Great brakes.
>
>But the engine stalls when under hard and long braking. I've read the
forums
>about this, and suggestions include:
>Too lean, richen idle
>Front float too low, raise
>Rear float too high, lower
>Ignition too retarded, advance
>Brake booster vacuum leak
>Other vacuum leaks
>
>I've tried most of the above with no luck. It should be said that with my
>cam profile from hell, it only sees 10 inches of vacuum at a nice steady
>four corner idle around 900 rpm.
>
>In the end I tested something a bit scary, going very fast in reverse and
>hard braking. And then it doesn't stall! That to me says that this is
indeed
>a fuel gravity issue, but I have no idea how to fix it. Somebody wrote
about
>jet extension (since those idiots at Holley put the jets on a wall instead
>of on the floor like a Rochester or Summit carb), but others were against
it
>because then I might get fuel starvation when accelerating hard, a much
>bigger problem.
>
>Any ideas?
>
>Mikael
>
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