Norfolkluegojnr
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| posted on 26/1/11 at 01:59 PM |
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megajolt and webers (TPS or MAP?)
Hi guys,
bit of advice if I may.
Just collecting all the bits for my Zetec conversion (from CVH) and i'm about to order the Megajolt to power the ignition.
On my dads car we are running fireblade carbs and 2D ignition. I'm keen to run 3D, and was wondering what was easier with twin 45 webers - MAP
or TPS?
The manifold is a Dunnell 901 if that makes a difference. I assume i'll need some parts/sensors but have no idea where to start!
Thanks
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ken555
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| posted on 26/1/11 at 02:37 PM |
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MAP all the way.
It is typically considered more accurate, as it measures the engines "breathing". Unless its a wild cam.
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carlknight1982
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| posted on 26/1/11 at 02:38 PM |
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Tps is easiest, you can get a kit from northampton motorsport for about 80 quid I'm about to order one Friday myself
Logic will get you from a A to B
Imagination will take you everywhere.
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Norfolkluegojnr
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| posted on 26/1/11 at 02:43 PM |
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Ok, so how do you measure MAP? and what do i need to enable me to 'plug in' to the MJ?
Sorry for laymans terms!
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mcerd1
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| posted on 26/1/11 at 02:45 PM |
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TPS for multi carb'd setups - its just easier
there is a reson why most of the carb'd bikes run TPS's - and if its good enough for an R1 / ZX9R then its good enough for your engine
TPS - all you need for is to attach it to the TPS to the end of the spindle on the carbs then run the 3 wires to the MJ
(I beleve some folk were using TPS's from a mondeo to keep costs down)
loads of folk have done it before - run a search on this site for weber and TPS (I just read something about emerald selling spindle adapters that
suit webers....)
MAP - you need a Vac. line from each branch of your manifold - then you need to join these together in a chamber big enough to 'iron out'
the lumpy vac. signal you can get from the individual ones then connect a vac. line from this to the actual MAP sensor (inside the MAP version of MJ
in most cases)
some folk just connect one vac. line to the MJ, but MJ want to see a nice 'smooth' signal like you'd get from a single carb - but
one cyl can give you a lumpy signal as its only sucking when that cyl's inlet valve is open.... (this can upset MJ)
this is the same reason why all the modified dizzy's for multi carb'd setups have the vac. advance removed (i.e. they use a 2D setup
because of the issues with the Vac. signal)
of course you can buy either version of MJ now and just run it in 2D mode untill you get round to sorting out the extra sensor for 3D later
[Edited on 26/1/2011 by mcerd1]
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HowardB
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| posted on 26/1/11 at 02:59 PM |
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I am also looking for a little help., I have a 2000zetec, standard as out of the donor except it has megasquirt.
First off can anyone recommend someone that can help me set the megasquirt, rolling road or tuning thing, not sure of the best way.
Location is Leicester, and somewhere local would be good.
thanks,...
Howard
Howard
Fisher Fury was 2000 Zetec - now a 1600 (it Lives again and goes zoom)
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MikeRJ
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| posted on 26/1/11 at 03:02 PM |
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I'd go for TPS in this case. It might not be quite as good as MAP, but it will still give you ignition control immeasurably more accurate than
a distributor and getting a good MAP signal from one choke per cylinder is a PITA.
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Norfolkluegojnr
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| posted on 26/1/11 at 03:07 PM |
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Right, MAP sounds too complicated for my tiny brain, so TPS it is.
Can anyone offer some advice on setup? Found this: WEBER DCOE THROTTLE POSITION SENSOR KIT NEW on eBay (end time 07-Feb-11
17:08:23 GMT) any good?
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mcerd1
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| posted on 26/1/11 at 03:13 PM |
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quote:
Originally posted by Norfolkluegojnr
Can anyone offer some advice on setup? Found this: WEBER DCOE THROTTLE POSITION SENSOR KIT NEW any good?
how much 
there is no way I'd pay that much
I'd look for a nice cheap one - this sort of one should do the job: eBay Item
then you just need to make up a little bracket and spindle adapter for it
at this point I'd give you a link - but unfortunatly the site I knew that had some good pics of a DIY version is no more 
(unless anyone knows what happened to it: http://www.cate1.co.uk/megajolt/ )
[Edited on 26/1/2011 by mcerd1]
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Norfolkluegojnr
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| posted on 26/1/11 at 03:42 PM |
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I did think it seemed pricey for a sensor
So are all TPS sensors essentially the same? Anything i need to look out for?
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paulf
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| posted on 26/1/11 at 03:59 PM |
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Some fords with single point injection had a sensor identical to the one that some company's sell for add on use.I think the fiestas and ford
KAs had them as well as some escorts, you just need to make a bracket to bolt it to the end of the carb and make a spindle extension with a flat on
it.Most TPS will work and I have used both the ford type and Bosch as fitted to Vauxhalls Peugeot etc.
Paul
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mcerd1
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| posted on 26/1/11 at 04:05 PM |
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MJ can work with most TPS's as far as I know, have read at the megajolt manual / website - it tells you how to calibrate the TPS
(I assume almost all of them will turn through ~90 deg. )
as for which one is the easiest to fit - I'd have a look / search to see what exactly other folk have done
(at this point I'm not much help as my ZX9R carbs have a TPS as standard)
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r1_pete
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| posted on 26/1/11 at 04:24 PM |
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I made my own bracket and 'special' nut / shaft extension to drive it, it was wasy enough, have some hex brass left if you want an
extension turning up let me know. I'm sure I've posted pics of it on here, but can't find anything in my archive....
The kits are about £65 from webcon, even at that I told them they could use it as a suppository!!
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r1_pete
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| posted on 26/1/11 at 04:25 PM |
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Here it is http://www.locostbuilders.co.uk/viewthread.php?tid=147439
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Norfolkluegojnr
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| posted on 26/1/11 at 04:41 PM |
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Thanks Pete. I'll pick up a sensor and let you know how I get on, may have to tap you up for the spindle.
Thanks for you help guys!
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austin man
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| posted on 26/1/11 at 06:54 PM |
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I manafctured a bracket and fitted a standard ford zetec TPS to the spindle shaft at a cos of £00 as it came with the donor not sure whether it can be
seen in my archive pictures of the webbers on a manifold
Life is like a bowl of fruit, funny how all the weird looking ones are left alone
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ed1801
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| posted on 26/1/11 at 07:12 PM |
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You can still get to most of the cate1 site on the 'way back machine' type your link in here:
http://www.archive.org/web/web.php
It's a very useful site!
quote:
Originally posted by mcerd1
quote:
Originally posted by Norfolkluegojnr
at this point I'd give you a link - but unfortunatly the site I knew that had some good pics of a DIY version is no more
(unless anyone knows what happened to it: http://www.cate1.co.uk/megajolt/ )
[Edited on 26/1/2011 by mcerd1]
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mcerd1
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| posted on 26/1/11 at 07:24 PM |
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quote:
Originally posted by ed1801
You can still get to most of the cate1 site on the 'way back machine' type your link in here:
http://www.archive.org/web/web.php
It's a very useful site!
top man
most of the thumbnail pics are still here at least - enough to give you the idea if nothing else
http://web.archive.org/web/20070912132155/http://www.cate1.co.uk/megajolt/installation.php
looks like you can still download his maps too
[Edited on 26/1/2011 by mcerd1]
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Norfolkluegojnr
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| posted on 26/1/11 at 09:12 PM |
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thanks guys, all really usefull stuff.
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