Barrie,
I switched from the original SU to the electronic SU offered by MOSS. My
3.5 is about as wild a 3.5 as I have seen. While I can rev to 7000, I
only do it for short bursts. (600 Holley double pumper on the Offy high
rpm intake). Maybe if you had a 4.2 and ran it on the highway at high
RPM and then punched it, you might get the starve problem, but I think
on the 3.5 even with 11.5:1 like I have, the electronic SU is fine.
I still have the stock rear gears with 205/15's on it, so I turn some
RPM's on the road. We did a run from Tulsa to Kansas City and back last
year and on the way back averaged over 90 MPH and never had a lean
problem. This is a pretty good sign of it being okay.
Richard
-----Original Message-----
From: mgb-v8-bounces+richard.morris=cox.net@autox.team.net
[mailto:mgb-v8-bounces+richard.morris=cox.net@autox.team.net] On Behalf
Of Jim Stuart
Sent: Thursday, September 25, 2008 6:30 PM
To: James Bown; Barrie Robinson; mgb-v8@autox.team.net
Subject: Re: [Mgb-v8] Fuel regulator for MGB GT V8
Barrie-
If you are using the stock MGB SU pump, it is unlikely you will develop
more
than 4 lbs of pressure, which is what the SU and later Zeinith crabs
required- maybe a touch over with a new pump.
Carter and Edelbrock 4bbl crabs, per the factory manuals, are quite
happy at
no more than 5 lbs.
I ran my Olds/Buick heads 215 10.75/1 compression for over 200,000 with
stock SU pumps and no regulator, and no problems. Later,
I found my 4.2 was starved at top end flat out with SU pump & changed to
a
Faucet.
Jim
----- Original Message -----
From: "James Bown" <jaguarsandrail@hotmail.com>
To: "Barrie Robinson" <barrie@look.ca>; <mgb-v8@autox.team.net>
Sent: Thursday, September 25, 2008 12:31 PM
Subject: Re: [Mgb-v8] Fuel regulator for MGB GT V8
> The jet/rod change is a good idea.
> I did the same to mine and the over rich condition is fixed.
> Do you need a regulator?
> Check your fuel pressure and find out.
> If it is too high then either use a regulator or fix the problem with
the
> fuel
> pump.
> I am not using a regulator because the pressure from my fuel pump is
OK.
> Regards,
> Jim Bown> Date: Thu, 25 Sep 2008 10:33:53 -0400> To:
> mgb-v8@autox.team.net>
> From: barrie@look.ca> Subject: [Mgb-v8] Fuel regulator for MGB GT V8>
> I
> have
> a Rover 3.5L engine with 10:1 compression and mild cam. It is > fed by
the
> appropriate (new) SU pump. While reading the manual (I > did what??)
on
> the
> Edelbrock 1404 carb, that is fitted, it said one > should use an
Edelbrock
> 8190 fuel regulator.> > Now, I do know my engine runs rich (very) and
on
> Mark's (D&D > Fabrications) advice, I am about to change to Prime
metering
> rod
> 1441 > size 062052, Primary jet 1421 080, (orange springs). I often
get >
> big
> smells of gas, and black smoke when I do a stationary broom > broom.
But
> the
> Eddy manual sort of suggests this could also be due > to too high a
fuel
> pressure.> > So my question is .....Is a fuel regulator a good idea,
or is
> it
> just > a refinement which would hardly make any difference? I did find
> that >
> one has to have a gauge too so the whole thing will cost about $100> >
> Regards> Barrie> > Barrie Robinson> (705) 721-9060>
> http://www.britishv8.org/MG/BarrieRobinson.htm> http://www.britcot.com
>
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