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Old 02-18-2019, 11:54 AM   #26
Fred Gwynne
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Quick cam question for your folks. Unless I'm mistaken I believe a cam with a higher lift allows more air to flow in. To me that means that more fuel has to go in as well. The MAF somehow sends in the proper amount of fuel based on the air. Is that correct? If so then will LH 2.2 system work with a Enem V15 cam? Or will it be running lean? From what I know the LH 2.2 system is not tunable.

P.S: Is the MAF part of the LH 2.2 system?

Thanks!
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Old 02-18-2019, 03:33 PM   #27
shoestring
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The fuel injector is before the valve, so any air that flows past the valve has already had it's shot of fuel. At wide open throttle, the MAF sends a signal to the LH box to send the DESIGNED amount of fuel based on air mass. It is almost certainly not optimal for maximum power production.

I believe LH2.2 is as tunable as LH2.4, though I have no experience with it.

Yes, the MAF is part of the LH2.2 system.
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Old 02-18-2019, 03:38 PM   #28
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To a certain degree the system will still compensate for the greater airflow. It's not like you are adding a monster cam. That is a street performance cam. It's a mild cam. I have run my enem V15 for about five years before I got a ezk chip. That more aggressive timing really woke the engine up. But you'll be fine and yes the maf sensor is part of the LH2.2 fuel system.

My suggestion would be to update to LH2.4 at some point to take advantage of the ezk ignition and fuel tuning if you want it. The stock injectors are fine for this cam. But it did like more optimal ignition timing.
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Old 02-18-2019, 04:15 PM   #29
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Thank you both very much. I asked because I would like to have one workable mod at a time rather than one mod which requires another which requires another deal.

A LH 2.4 conversion sounds great to me! Maybe that will happen much later on this year by a pro. I've got very little mechanical skills.

Edit: If anyone knows about LH 2.2 tuning then please let me know. Thanks!

Last edited by Fred Gwynne; 02-18-2019 at 04:52 PM..
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Old 02-18-2019, 07:35 PM   #30
Marvelous3
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Quote:
Originally Posted by shoestring View Post
The fuel injector is before the valve, so any air that flows past the valve has already had it's shot of fuel. At wide open throttle, the MAF sends a signal to the LH box to send the DESIGNED amount of fuel based on air mass. It is almost certainly not optimal for maximum power production.

I believe LH2.2 is as tunable as LH2.4, though I have no experience with it.

Yes, the MAF is part of the LH2.2 system.
I was always under the impression that at wot lh went into open loop and it would fire the injectors to the max.
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Old 02-19-2019, 07:09 AM   #31
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Quote:
Originally Posted by Marvelous3 View Post
I was always under the impression that at wot lh went into open loop and it would fire the injectors to the max.
You can use slightly larger injector, Ford brown top injectors are what I used (pm me if you're interested in buying my used ones) with 2.2 but you have to adjust the maf for it to idle and cruise properly. You'll also need a wide band O2 sensor, it will make it much easier to adjust the maf.
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Old 02-19-2019, 08:56 AM   #32
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Quote:
Originally Posted by Marvelous3 View Post
I was always under the impression that at wot lh went into open loop and it would fire the injectors to the max.
Nope. At WOT (and proper coolant temperature) it references an injector pulse table and sends a corresponding signal. It's nowhere near 100% duty cycle.
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