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| 914Mels |
Jul 4 2011, 02:07 PM
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#1
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Member ![]() ![]() Group: Members Posts: 357 Joined: 20-June 11 From: Santee Member No.: 13,221 Region Association: Southern California |
(IMG:style_emoticons/default/sawzall-smiley.gif) I'm looking to fine tune the injection on my '70 914 and am considering a LM-1 meter to take out the guess work. Has anyone done much work with one of these? Or suggest a different model meter?
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| Bleyseng |
Jul 7 2011, 11:25 AM
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#2
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Aircooled Baby! ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 13,037 Joined: 27-December 02 From: Seattle, Washington (for now) Member No.: 24 Region Association: Pacific Northwest |
Factory Djet is close enough for a hydro cam 914..as the cam timing is mucked up by the ramps compared to a solid lifter cam which has better cam timing.
use the LM1 to set the "partload" to 13.5/14 to 1 AFR at 2500rpms driving at a steady speed up a long slight uphill road in 3rd gear. Check it at freeway speeds to get it to hang around 13.5/14 driving in 5th gear at speed up slight slopes as if you are coasting (off throttle) its no good. You want a steady throttle at a steady speed with slight load. Then check the Wide open throttle settings- those should be in third gear at 10-15mph punch it and see. It should start at 11/11.5 to 1 to start and all the way up to 5000 rpms slowly lean out to 13.5 to 1. This is adjusted with the large machined plug witch you have to remove undamaged to get to the inner screws to adjust the part load. Finally, check the idle as it should be to 13.5 to 1..... First off, make sure the engine is in top tune, valves adjusted, no vacuum leaks and Fuel pressure adjusted to 29lbs. |
| 914_teener |
Jul 7 2011, 03:56 PM
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#3
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914 Guru ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 5,270 Joined: 31-August 08 From: So. Cal Member No.: 9,489 Region Association: Southern California |
Factory Djet is close enough for a hydro cam 914..as the cam timing is mucked up by the ramps compared to a solid lifter cam which has better cam timing. use the LM1 to set the "partload" to 13.5/14 to 1 AFR at 2500rpms driving at a steady speed up a long slight uphill road in 3rd gear. Check it at freeway speeds to get it to hang around 13.5/14 driving in 5th gear at speed up slight slopes as if you are coasting (off throttle) its no good. You want a steady throttle at a steady speed with slight load. Then check the Wide open throttle settings- those should be in third gear at 10-15mph punch it and see. It should start at 11/11.5 to 1 to start and all the way up to 5000 rpms slowly lean out to 13.5 to 1. This is adjusted with the large machined plug witch you have to remove undamaged to get to the inner screws to adjust the part load. Finally, check the idle as it should be to 13.5 to 1..... First off, make sure the engine is in top tune, valves adjusted, no vacuum leaks and Fuel pressure adjusted to 29lbs. Very cool! Thanks for that Geoff |
| 914Mels |
Jul 7 2011, 07:14 PM
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#4
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Member ![]() ![]() Group: Members Posts: 357 Joined: 20-June 11 From: Santee Member No.: 13,221 Region Association: Southern California |
Factory Djet is close enough for a hydro cam 914..as the cam timing is mucked up by the ramps compared to a solid lifter cam which has better cam timing. use the LM1 to set the "partload" to 13.5/14 to 1 AFR at 2500rpms driving at a steady speed up a long slight uphill road in 3rd gear. Check it at freeway speeds to get it to hang around 13.5/14 driving in 5th gear at speed up slight slopes as if you are coasting (off throttle) its no good. You want a steady throttle at a steady speed with slight load. Then check the Wide open throttle settings- those should be in third gear at 10-15mph punch it and see. It should start at 11/11.5 to 1 to start and all the way up to 5000 rpms slowly lean out to 13.5 to 1. This is adjusted with the large machined plug witch you have to remove undamaged to get to the inner screws to adjust the part load. Finally, check the idle as it should be to 13.5 to 1..... First off, make sure the engine is in top tune, valves adjusted, no vacuum leaks and Fuel pressure adjusted to 29lbs. Very cool! Thanks for that Geoff Looks like it's time to buy a meter. |
914Mels air fuel ratio meters Jul 4 2011, 02:07 PM
kg6dxn The LM-1 is a good unit. AEM and Autometer make th... Jul 4 2011, 03:57 PM
914Mels
The LM-1 is a good unit. AEM and Autometer make t... Jul 4 2011, 04:56 PM
Dave_Darling Heh, the system doesn't even rely on fuel maps... Jul 4 2011, 04:23 PM
Strudelwagon
Heh, the system doesn't even rely on fuel map... Jul 4 2011, 05:56 PM
brant I've used an LM-1 to adjust MPS units to fit t... Jul 4 2011, 05:45 PM
914Mels
I've used an LM-1 to adjust MPS units to fit ... Jul 4 2011, 06:00 PM
914_teener
I've used an LM-1 to adjust MPS units to fit... Jul 5 2011, 11:03 AM
914Mels
[quote name='914Mels' post='1504455' date='Jul 4 ... Jul 5 2011, 11:38 AM
brant its been done a lot
but the wideband will tell you... Jul 4 2011, 06:00 PM
914Mels
its been done a lot
but the wideband will tell yo... Jul 4 2011, 06:36 PM
ConeDodger Remember to sample under load. Neutral revving num... Jul 4 2011, 08:40 PM
sean_v8_914 LM1 can be found at a discount since they came out... Jul 5 2011, 11:22 AM
Maltese Falcon Mike, I'm using the unit from Nordskog Instrum... Jul 5 2011, 09:38 PM
brant nordskog makes some good stuff
and their customer-... Jul 5 2011, 10:59 PM
914Mels I like your dash install, I'm not sure I want ... Jul 6 2011, 05:44 PM
kg6dxn
I like your dash install, I'm not sure I want... Jul 6 2011, 07:42 PM
914_teener
I like your dash install, I'm not sure I wan... Jul 6 2011, 11:17 PM
Mark Henry Just an FYI this is the JAW wideband, it's a D... Jul 7 2011, 09:21 AM
914Mels Sounds like you've done this once or twice. Jul 7 2011, 11:31 AM
brant It may not be where the factory set the MPS.. for... Jul 7 2011, 12:55 PM
Bleyseng
It may not be where the factory set the MPS.. fo... Jul 7 2011, 07:58 PM![]() ![]() |
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