Hey guys,
My racing season has begun, so I've been gone. Now, I have a few minutes and I have a question. I have finally got it on the street and got it up to 25 mph, res area, and I am trying to get it to 13 to 1 to 14 to 1 AFR. At higher loads like 40 to 100 loads, where should the AFR be? I find it at 11 to 1 AFR and I'm sure that's wrong and I am sure that 14 to 1 is just as wrong. At 25 mph the driver steps on the brakes and gives it the gas I need to achieve the load that I am working on. Now, I need to get it out of the res and get 35, 40, 45 and so on in all the loads. So, there has to be a rule of thumb on the loads or loads per rpm that would be a good safe place to start with. I haven't even got into the turbo part of it yet nor do I want to until I feel a little better about the tuneup. I don't have an EGT gauge on it like I do on the fuel cars, so I have to depend on the LM-2 gauge, I do plan to get one. What do you think?
What is a good AFR number at higher loads and RPM'S?
Moderator: LT401Vette
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Re: What is a good AFR number at higher loads and RPM'S?
Hard to go wrong with 12.8:1 on a NA engine for power.
Find the Manuals up top under Quick links: Manuals.
Cheers Luke
Cheers Luke
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Re: What is a good AFR number at higher loads and RPM'S?
i was lead to believe 12.5 was where peak power was? could well be wrong
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Re: What is a good AFR number at higher loads and RPM'S?
At that point we are splitting hairs without enough information. AFR gauges vary somewhat from one gauge to the next. You should always test with a dyno or by playing with acceleration rates seeing what YOUR motor wants with YOUR AFR gauge. With a perfect accuracy gauge, the answer will come up somewhere near 12.9 AFR on a NA motor with reasonable timing.
Have fun tuning
Andy
Have fun tuning
Andy
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- Experienced MS/Extra'er
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Re: What is a good AFR number at higher loads and RPM'S?
thats a very good point!whittlebeast wrote:At that point we are splitting hairs without enough information. AFR gauges vary somewhat from one gauge to the next. You should always test with a dyno or by playing with acceleration rates seeing what YOUR motor wants with YOUR AFR gauge. With a perfect accuracy gauge, the answer will come up somewhere near 12.9 AFR on a NA motor with reasonable timing.
Have fun tuning
Andy
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- Super MS/Extra'er
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- Joined: Fri May 07, 2004 3:33 am
- Location: Australia
Re: What is a good AFR number at higher loads and RPM'S?
Agreed that's why mine loves 13:1, on my gauge, on my engine.
Find the Manuals up top under Quick links: Manuals.
Cheers Luke
Cheers Luke