 D-jet tune, What is optimum a/f reading for cruising? |
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| DRPHIL914 |
 Feb 23 2017, 11:51 AM
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#1
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Dr. Phil  Group: Members Posts: 5,769 Joined: 9-December 09 From: Bluffton, SC Member No.: 11,106 Region Association: South East States 
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I am turning my MPS in right now when I'm cruising I'm around 15 on the AF meter around 2500 RPM when I accelerate the drive drops to about 12.8 my question is some say 14.7 is the stoichiometric or prime level but with air cooled motors I've heard others say I don't see that discussed in the PB Anders information
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| Mark Henry |
Feb 23 2017, 12:10 PM
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#2
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
QUOTE(Philip W. @ Feb 23 2017, 12:51 PM)  ...when I'm cruising I'm around 15 on the AF meter around 2500 RPM when I accelerate.... (IMG:style_emoticons/default/blink.gif) This is about the fastest way to fuck your engine. Sorry if that is blunt but NEVER EVER LUG AN AIRCOOLED ENGINE!!! Always cruise at or above 3000 rpm, fan speed is the main way this engine cools. |
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| DRPHIL914 |
Feb 23 2017, 12:52 PM
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#3
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Dr. Phil Group: Members Posts: 5,769 Joined: 9-December 09 From: Bluffton, SC Member No.: 11,106 Region Association: South East States
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QUOTE(Mark Henry @ Feb 23 2017, 01:10 PM) QUOTE(Philip W. @ Feb 23 2017, 12:51 PM) ...when I'm cruising I'm around 15 on the AF meter around 2500 RPM when I accelerate.... (IMG:style_emoticons/default/blink.gif) This is about the fastest way to fuck your engine. Sorry if that is blunt but NEVER EVER LUG AN AIRCOOLED ENGINE!!! Always cruise at or above 3000 rpm, fan speed is the main way this engine cools. no apology necessary. thanks for the link, - and yes I usually am at about 3200rpm in 4th gear cruising around here , or my 5th on the interstate at about 75 is 3000rpm(5th gear was changed for lower rpm at 75-80 highway driving, - I was just using the 2500-2750 as an example because at that moment that is what my a/f meter was reading at that rpm while posting(yes I was posting this while driving- I had help) |
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| Mark Henry |
Feb 23 2017, 12:59 PM
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#4
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
QUOTE(Philip W. @ Feb 23 2017, 01:52 PM) QUOTE(Mark Henry @ Feb 23 2017, 01:10 PM) QUOTE(Philip W. @ Feb 23 2017, 12:51 PM) ...when I'm cruising I'm around 15 on the AF meter around 2500 RPM when I accelerate.... (IMG:style_emoticons/default/blink.gif) This is about the fastest way to fuck your engine. Sorry if that is blunt but NEVER EVER LUG AN AIRCOOLED ENGINE!!! Always cruise at or above 3000 rpm, fan speed is the main way this engine cools. no apology necessary. thanks for the link, - and yes I usually am at about 3200rpm in 4th gear cruising around here , or my 5th on the interstate at about 75 is 3000rpm(5th gear was changed for lower rpm at 75-80 highway driving, - I was just using the 2500-2750 as an example because at that moment that is what my a/f meter was reading at that rpm while posting(yes I was posting this while driving- I had help) Follow that link, AFR down low as in 1st gear taking off should still be 12-13.5 :1, but lugging below 3000 will give you a high AFR. Really look at the AFR accelerating up to and over 3000 in this case. I know peeps forget or higher rpm sucks in stop and go, but try to remember to gear down. |
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Posts in this topic
Philip W. D-jet tune Feb 23 2017, 11:51 AM
Mark Henry This was just hashed over a couple weeks ago.... s... Feb 23 2017, 12:01 PM
N_Jay
This was just hashed over a couple weeks ago.... ... Feb 23 2017, 12:34 PM Philip W. ok read back thru the other thread and this confir... Feb 23 2017, 01:41 PM Philip W.
ok read back thru the other thread and this confi... Feb 23 2017, 04:39 PM |
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