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Wales
by Joske Vermeule, September 1
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Jun 14th, 2026
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Joined: Dec 2011
Posts: 1,943
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: Dec 2011
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I have been looking at OMEX for some time. I have also researched MegaSquirt (even bought an ECU) as well as using motorcycle throttle bodies etc. etc. But, so far, have not been able to make a decision about increased performance. Also I am in a quandary about Original vs Throttle body.
My feeling is that the Ford ECU is primarily emission and MPG oriented while the OMEX is performance oriented. MegaSquirt will run the Fuel Injection system but "How Well?"
Button
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Joined: Dec 2011
Posts: 1,943
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: Dec 2011
Posts: 1,943 |
I have been looking at OMEX for some time. I have also researched MegaSquirt (even bought an ECU) as well as using motorcycle throttle bodies etc. etc. But, so far, have not been able to make a decision about increased performance. Also I am in a quandary about Original vs Throttle body.
My feeling is that the Ford ECU is primarily emission and MPG oriented while the OMEX is performance oriented. MegaSquirt will run the Fuel Injection system but "How Well?" Coupled with My Throttle Body quandary is "Variable Valve Timing" for us Ordinary Back Road Drivers.
Button
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Joined: Dec 2011
Posts: 1,943
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
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http://www.turbosport.co.uk/showthread.php?t=354531Interesting information about ZETEC BHP/Torque in Fuel Injection engines as well as Weber DCOE's. Looks like the Webers have the "Edge". But suspect driveability of the Webers are not as good.
Button
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Joined: May 2015
Posts: 614 Likes: 22
Talk Morgan Regular
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Talk Morgan Regular
Joined: May 2015
Posts: 614 Likes: 22 |
Button,
My experience of fitting EFI to a Lotus Twink is this.
Power (BHP) gained (or lost) by fitting TB's vs Webers is zero.
Torque (FT/LB) gained from the ECU mapped ignition vs worn dizzy is lots.
Torque (FT/LB) gained from the ECU mapped ignition vs good dizzy is some.
Driveability gained from fitting EFI is lots.
MPG gained is about 4 mpg.
I would also add that any of the ECU's that give you the features that you want will perform well. The key is the person who does the mapping.
The best ECU poorly mapped will be crap and the worst ECU well mapped will be good.
Cheers
John
PS would love to fit TB's to my +4 when funds allow.
Last edited by John07; 08/01/17 09:14 PM.
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Joined: Dec 2011
Posts: 1,943
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: Dec 2011
Posts: 1,943 |
Button,
My experience of fitting EFI to a Lotus Twink is this.
Power (BHP) gained (or lost) by fitting TB's vs Webers is zero.
Torque (FT/LB) gained from the ECU mapped ignition vs worn dizzy is lots.
Torque (FT/LB) gained from the ECU mapped ignition vs good dizzy is some.
Driveability gained from fitting EFI is lots.
MPG gained is about 4 mpg.
I would also add that any of the ECU's that give you the features that you want will perform well. The key is the person who does the mapping.
The best ECU poorly mapped will be crap and the worst ECU well mapped will be good.
Cheers
John
PS would love to fit TB's to my +4 when funds allow. Thanks! Which +4 do You have? If it is a Zetec or Duratec, why do You think a TB would improve the performance?
Button
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Joined: May 2015
Posts: 614 Likes: 22
Talk Morgan Regular
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Talk Morgan Regular
Joined: May 2015
Posts: 614 Likes: 22 |
Button,
I have a Duratec.
"why do You think a TB would improve the performance?"
Not quite sure what you mean by that. I was considering fitting the same kit as the OP fitted. That is 1 choke per cylinder vs Fords 1 choke for 4 cyls. It should give another 35 BHP (approx), but at higher RPM.
Yes I could fit a pair of Webers but I think using an ECU to control the engine is a good idea. To me the pros far out weigh the cons. Plus I have the emission laws to think of.
Cheers
John
Last edited by John07; 09/01/17 09:45 AM.
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Joined: Dec 2011
Posts: 1,943
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: Dec 2011
Posts: 1,943 |
Button,
I have a Duratec.
"why do You think a TB would improve the performance?"
Not quite sure what you mean by that. I was considering fitting the same kit as the OP fitted. That is 1 choke per cylinder vs Fords 1 choke for 4 cyls. It should give another 35 BHP (approx), but at higher RPM.
Yes I could fit a pair of Webers but I think using an ECU to control the engine is a good idea. To me the pros far out weigh the cons. Plus I have the emission laws to think of.
Cheers
John The information I am getting (mainly from My friends in Seattle and not near as knowledgeable as the UK) is that there is NO increase in Torque/BHP (not so sure at a higher RPM), better engine response, but poorer driveability. 35 HP is certainly significant. I realize that You can not use the Weber DCOE in the UK due to emissions. But I can. I am using some sort of "Home Grown" computer to operate the ignition. But it only uses RPM to advance/retard the timing (about like a Dizzy without vacuum advance/retard). I did follow 2 TR powered +4's and struggled to keep up with them. Makes Me wonder!
Button
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Joined: Dec 2011
Posts: 1,943
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: Dec 2011
Posts: 1,943 |
Button,
I have a Duratec.
"why do You think a TB would improve the performance?"
Not quite sure what you mean by that. I was considering fitting the same kit as the OP fitted. That is 1 choke per cylinder vs Fords 1 choke for 4 cyls. It should give another 35 BHP (approx), but at higher RPM.
Yes I could fit a pair of Webers but I think using an ECU to control the engine is a good idea. To me the pros far out weigh the cons. Plus I have the emission laws to think of.
Cheers
John The information I am getting (mainly from My friends in Seattle and not near as knowledgeable as the UK) is that there is NO increase in Torque/BHP (not so sure at a higher RPM), better engine response, but poorer driveability. 35 HP is certainly significant. I realize that You can not use the Weber DCOE in the UK due to emissions. But I can. I am using some sort of "Home Grown" computer to operate the ignition. But it only uses RPM to advance/retard the timing (about like a Dizzy without vacuum advance/retard). I did follow 2 TR powered +4's and struggled to keep up with them. Makes Me wonder! The Key seems to be "choke". I think I should be on a "Kit Car Forum" rather than "Talk Morgan". If any body has a good UK KC Forum please advise.
Button
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Joined: May 2015
Posts: 614 Likes: 22
Talk Morgan Regular
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Talk Morgan Regular
Joined: May 2015
Posts: 614 Likes: 22 |
Button, My claims for my Lotus are just the results as I find them. As for your comment of "poorer driveablity" all I can say is that there must have been something wrong. The better driveability is one of the best things of the conversion. Also, to be fair it may depend on what carbs you have changed from. SU's in particular are good on the driveability front, but EFI should still be better. The extra power from a 2l Duratec with TB's is only what Omex claim for their standard engine with TB's. http://omextechnology.co.uk/Omex%20Duratec%20Engine%20v4_0.pdfIf, on your home made ignition you are not using the engine load as an input then you are missing a trick. With this you can run a lot more advance while cruising and still keep the engine from pinking while under heavy load. If building a new engine it will enable you to run a higher compression ratio. A couple more links that may be interesting: http://www.sbdev.co.uk/Parts%201_6L%20Catalogue.htmhttp://www.emeraldm3d.com/articles/cat/knowledge-zone/Cheers John
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Joined: Dec 2011
Posts: 1,943
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: Dec 2011
Posts: 1,943 |
Button, My claims for my Lotus are just the results as I find them. As for your comment of "poorer driveablity" all I can say is that there must have been something wrong. The better driveability is one of the best things of the conversion. Also, to be fair it may depend on what carbs you have changed from. SU's in particular are good on the driveability front, but EFI should still be better. The extra power from a 2l Duratec with TB's is only what Omex claim for their standard engine with TB's. http://omextechnology.co.uk/Omex%20Duratec%20Engine%20v4_0.pdfIf, on your home made ignition you are not using the engine load as an input then you are missing a trick. With this you can run a lot more advance while cruising and still keep the engine from pinking while under heavy load. If building a new engine it will enable you to run a higher compression ratio. A couple more links that may be interesting: http://www.sbdev.co.uk/Parts%201_6L%20Catalogue.htmhttp://www.emeraldm3d.com/articles/cat/knowledge-zone/Cheers John Thanks John; Maybe You will pull Me into the 21st Century. Lots of good information. This should keep Me busy for a bit.
Button
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