thepest
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| posted on 4/5/08 at 07:09 PM |
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X-flows dizzy
I have a 1300 x-flow with a set of weber 40's. What kind of dizzy is normally used with this setup? the one I have I had to use an angled cap to
clear the carbs, and anytime I need to remove the dizzy I need to remove the intake manifold. Is this normal for 1300's or is there another type
of dizzy on the market for such use?
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stevebubs
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| posted on 4/5/08 at 07:22 PM |
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angled cap is the norm
If it drives you up the wall that much, go megajolt or some other ecu - however, you'll need to find somewhere to mount up the VR sensor and the
coilpack, so not trivial...
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thepest
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| posted on 4/5/08 at 07:24 PM |
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Thanks, is there a megajolt/squirt thread I can read? I have been wanting to experiment with something similar for a while and I wouldnt know where to
start
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stevebubs
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| posted on 4/5/08 at 07:39 PM |
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http://www.dwjenkins.plus.com/dizzy-plug.htm shows how to make the plug...I'm sure David
Jenkins will be along to explain his install shortly....
[Edited on 4/5/08 by stevebubs]
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thepest
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| posted on 4/5/08 at 07:41 PM |
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thanks,got anything for the Megajolt/squirt too?
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paulf
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| posted on 4/5/08 at 07:44 PM |
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I converted my crossflow to Megajolt , theres some photos in my archive.It is worth doing as it also gives shift lights and rev limiter and improves
drivability.
The web site is here http://www.autosportlabs.net/index.php?title=MegaJolt_Lite_Jr._Users_Welcome
Paul.
[Edited on 4/5/08 by paulf]
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David Jenkins
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| posted on 4/5/08 at 07:56 PM |
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quote:
Originally posted by stevebubs
http://www.dwjenkins.plus.com/dizzy-plug.htm shows how to make the plug...I'm sure David
Jenkins will be along to explain his install shortly....
Megajolt seems a bit daunting at first, but really it's very simple. The heart of the system is Ford's own EDIS ignition system, as found
in all sorts of small Fords from around 1970s on. These can be found in scrap yards, or bought on-line from places like ebay. Along with this
you'll the special coil and VR sensor - also from the same car as the EDIS, if you're lucky.
The VR sensor is mounted at the front of the engine, pointing at a special trigger wheel mounted on the crank pulley. With the EDIS unit, coil and
sensor fitted you can now start the car - but it will be in limp-home mode as the advance is fixed at 10 degrees BTDC.
Here's where the MJ unit comes in - it takes a signal from the EDIS, waits a while and sends a signal back along a different wire, altering when
the ignition fires. It decides when to trigger the EDIS from the speed of the engine and from either the throttle position or the inlet manifold
vacuum, which tells it the engine load. You can draw up a map to decide what advance to give at a certain engine speed and load. You can get more
info from the MJ website, at Autosport Labs.
The big benefits are rock-steady ignition, a big fat spark at all revs, and the ability to tune the map to suit your own engine. Oh - and a great big
gap where the dizzy used to be!
Throttle bodies and megasquirt would be better - but sorting out fuelling maps, ignition maps and all that stuff is pretty daunting - MJ is far
simpler! If you want to know what MS is all about, go and look at their website and read their disclaimer ("This is an experimental system and
we take no responsibility..." blah blah).
[Edited on 4/5/08 by David Jenkins]
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thepest
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| posted on 4/5/08 at 07:58 PM |
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Thanks, looks like I am ordering me one then  Can you tell me what are the advantages of having TPS over MAP if any?
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David Jenkins
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| posted on 4/5/08 at 08:00 PM |
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If you've got twin webber carbs then TPS will be far simpler - trying to get a proper vacuum signal from multiple carbs can be done, but
it's not easy. MAP is theoretically superior, but TPS is pretty much close enough for us mortals.
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yamapinto
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| posted on 4/5/08 at 08:04 PM |
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megajolt
there are no advantages in running tps over map map is exactly what the engine is doing tps is what it wants to do if your keeping the carbs stick
with map
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UncleFista
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| posted on 4/5/08 at 08:09 PM |
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quote:
Originally posted by yamapinto
there are no advantages in running tps over map map is exactly what the engine is doing tps is what it wants to do if your keeping the carbs stick
with map
Unless of course you're running dual carbs/bike carbs etc. and find it difficult/impossible to get a steady MAP reading 
Tony Bond / UncleFista
Love is like a snowmobile, speeding across the frozen tundra.
Which suddenly flips, pinning you underneath.
At night the ice-weasels come...
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David Jenkins
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| posted on 4/5/08 at 08:10 PM |
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Fine - but try getting a good and accurate vacuum signal from 4 inlet manifold tubes, without pulsing and without screwing up the mixture in each
tube. As I said - it can be done, but it's fiddly and will need a lot of experiment.
On the other hand, the TPS pot is just fixed to the end of the carb spindle...
(Ha! Tony beat me to it... )
[Edited on 4/5/08 by David Jenkins]
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thepest
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| posted on 4/5/08 at 08:11 PM |
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So should I need to make up my own bracket on my weber carbs? and what kind of TPS should I use?
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David Jenkins
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| posted on 4/5/08 at 08:23 PM |
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I can't help with the bracket, but the MJ unit can calibrate itself with just about any standard TPS pot.
I'm sure someone will come along with ideas for fixing the pot to the carbs.
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02GF74
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| posted on 4/5/08 at 08:32 PM |
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quote:
Originally posted by stevebubs
angled cap is the norm
I'm gonna have to disagree.
I havr both Bosh (orange cap) and Motocraft (Ford) distributor and the Bosch one is taller. The Bosch is the only one for whcih the angled cap is
available - I haven't seen one of these caps but I have douobts as to whether this will fit on a 1300.
There are at least two different inlet manifolds - see Burton Power - the 1300 is angled more to allow greater clearance.
Even with one of those fitted, it is a struggle getting the motorcraf dizzy in - I have small rubber caps that allow the leads to hug the dizzy
more.
megjolt does away with of all this.
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UncleFista
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| posted on 4/5/08 at 08:35 PM |
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quote:
Originally posted by thepest
So should I need to make up my own bracket on my weber carbs? and what kind of TPS should I use?
We used a standard Mondeo one, photos HERE
Tony Bond / UncleFista
Love is like a snowmobile, speeding across the frozen tundra.
Which suddenly flips, pinning you underneath.
At night the ice-weasels come...
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paulf
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| posted on 4/5/08 at 08:39 PM |
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There is a weber type TPS fitted to some fords with single point injection, ie some escorts and fiestas.I have seen these used on webers with a simple
bracket to support it and a disk fitted to the end of the carb spindle, i have also used Bosch sensors as used on peugots , vauxhalls etc and almost
any sensor with a resistance of 5kohms upwards will work if it can be mounted.
I actually used a MAP sensor succesfully on mine with throttle bodys as at present i am using a megajolt for ignition and controling the injection
with a seperate ECU.
Paul.
quote:
Originally posted by thepest
So should I need to make up my own bracket on my weber carbs? and what kind of TPS should I use?
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stevebubs
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| posted on 4/5/08 at 10:03 PM |
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quote:
Originally posted by 02GF74
quote:
Originally posted by stevebubs
angled cap is the norm
I'm gonna have to disagree.
I havr both Bosh (orange cap) and Motocraft (Ford) distributor and the Bosch one is taller. The Bosch is the only one for whcih the angled cap is
available - I haven't seen one of these caps but I have douobts as to whether this will fit on a 1300.
There are at least two different inlet manifolds - see Burton Power - the 1300 is angled more to allow greater clearance.
Even with one of those fitted, it is a struggle getting the motorcraf dizzy in - I have small rubber caps that allow the leads to hug the dizzy
more.
Beg to differ... it's tight but it will fit!! 
Link to picture of my Fury with a 1300 + twin 40s + side entry
dizzy
You're certainly right about the differences in manifolds, though - the manifold for a 1300 on twin 40s is longer and raises the carbs up higher
than the manifold for a 1600 engine...
quote:
megjolt does away with of all this.
Certainly does...so long as you can get a crank trigger fabbed up....
[Edited on 4/5/08 by stevebubs]
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stevebubs
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| posted on 4/5/08 at 10:15 PM |
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quote:
Originally posted by paulf
There is a weber type TPS fitted to some fords with single point injection, ie some escorts and fiestas.I have seen these used on webers with a simple
bracket to support it and a disk fitted to the end of the carb spindle, i have also used Bosch sensors as used on peugots , vauxhalls etc and almost
any sensor with a resistance of 5kohms upwards will work if it can be mounted.
I actually used a MAP sensor succesfully on mine with throttle bodys as at present i am using a megajolt for ignition and controling the injection
with a seperate ECU.
Paul.
quote:
Originally posted by thepest
So should I need to make up my own bracket on my weber carbs? and what kind of TPS should I use?
Dellortos not webers but you can clearly see the TPS in this
photo
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thepest
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| posted on 5/5/08 at 07:53 AM |
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Thanks everyone, I have enough info to get started. I will post again as I progress.... Cheers
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