My Merkur used a resistor wire on the ground side to reduce the delivery rate of the supply pump. I want to use a high pressure pump as a supply pump on my swirl pot system (because I have one).
I have an ignition ballast resistor to use, it is a beefy heat sinked unit. Should I wire it on the ground side, or the 12v side of the pump, or does it matter?
fuel pump resistor
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Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0).
If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days
The full forum rules are here: Forum Rules, be sure to read them all regularly.
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flylear45
- MegaSquirt Newbie
- Posts: 6
- Joined: Wed May 12, 2004 3:20 am
- Location: http://home.roadrunner.com/~jimmble
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fuel pump resistor
Jim Franks
MS'd 2 Merkur's, custom flathead Ford motorcycle, a BMW with 2.3 turbo, TR7 2.3 turbo.
Latest mission: 5.0 VGT turbo 1988 TC with 4r70w. Yeah
Too many projects, too little time...
MS'd 2 Merkur's, custom flathead Ford motorcycle, a BMW with 2.3 turbo, TR7 2.3 turbo.
Latest mission: 5.0 VGT turbo 1988 TC with 4r70w. Yeah
Too many projects, too little time...
It shouldnt matter which side the resistor is on. If it was on the ground side and it overheated and shorted to the chassis at least it would still run (at full power). If that happened on the + side it would be a bit more messy.
Are you sure the pump you are using is rated to run at the voltage that would result with a resistor? Or are you trying to run the factory pump? You should also do the math and make sure the ballast resistor has a high enough continuous current rating to run a fuel pump, some of those things draw quite a bit of power.
What did you use for a swirl pot?
Are you sure the pump you are using is rated to run at the voltage that would result with a resistor? Or are you trying to run the factory pump? You should also do the math and make sure the ballast resistor has a high enough continuous current rating to run a fuel pump, some of those things draw quite a bit of power.
What did you use for a swirl pot?
73 Cadillac Eldorado convert Fairly stock 8.5:1 500cuin/8.2L
MSIIV3,2.88,relay board, LC-1,Older Holley 670cfm 2bbl TBI w/85lbhr injectors.
MSIIV3,2.88,relay board, LC-1,Older Holley 670cfm 2bbl TBI w/85lbhr injectors.
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flylear45
- MegaSquirt Newbie
- Posts: 6
- Joined: Wed May 12, 2004 3:20 am
- Location: http://home.roadrunner.com/~jimmble
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Thanks for the reply. I found a resistance value for the old resistance wire, and I'm going to source up a length of suitable resistance wire to duplicate it on my new install. The ballast resistor was too much. In the meantime, I'm going to run it full bore. I just want to cut down the heat and pressure a tad.
I used a GE whole house water filter as a surge tank. I got the idea from a Mustang guy. Details are on my webpages.
Jim
I used a GE whole house water filter as a surge tank. I got the idea from a Mustang guy. Details are on my webpages.
Jim
Jim Franks
MS'd 2 Merkur's, custom flathead Ford motorcycle, a BMW with 2.3 turbo, TR7 2.3 turbo.
Latest mission: 5.0 VGT turbo 1988 TC with 4r70w. Yeah
Too many projects, too little time...
MS'd 2 Merkur's, custom flathead Ford motorcycle, a BMW with 2.3 turbo, TR7 2.3 turbo.
Latest mission: 5.0 VGT turbo 1988 TC with 4r70w. Yeah
Too many projects, too little time...