5 replies to this topic

[JRHille]

Anyone have any information about the adjustable fuel pressure in the 1.6? I have the regulator and it will be on the dyno in a few weeks..Anything I should look out for/ numbers I should shoot for?

Thanks,
Justin

[john mueller]

Justin;
I'm in the same boat bro... I installed a mechanical pressure gauge, the Innovate AF gauge is going in this week to set a baseline for the 5X Racing AFPR... Then off to the dyno I guess.

Anyone have target pressure and AF Ratio for a 1.6l??

[JRHille]

OH! also, would it be in my best interest to purchase an AF gauge??..I know it would be safer but I think I read something about the 1.6 changing the mixture as the car gets hotter later in the races?

[john mueller]

OH! also, would it be in my best interest to purchase an AF gauge??..I know it would be safer but I think I read something about the 1.6 changing the mixture as the car gets hotter later in the races?

Absolutely !!! Well, you need a way to monitor AF ratio but it does not have to be a gauge. If you have a Data Aq (w/ logger) it may have a way to save & display AF.

[5X Racing]

Get an AF gauge! One that you can monitor real time in the car is best, the innovate LC-1 and DB gauge combo we sell works great, and as an added bonus, I believe you can integrate it with a data system too.

As for baselines, the factory pressure on a 1.6 should range around 35 I believe, so start at what your pressure was to begin with and work your way up if on the dyno. I have heard 38 works well. The point is to push as much fuel as possible without going too rich on the afr gauge.

Air/fuel ratio is going to depend on whether you want more torque or horsepower, and balancing it with the best dyno results. For example, a high speed track that doesnt require much down low grunt, running in the 13:1 - 13:5 range might work good. For tracks that require some down low torque, mid-range, or to pull out of a 2nd gear hairpin, you might find running in the high 12:1 range would be better, like 12.5:1 and up.

Also, I have heard that using the stock setting on the air flow meter is a good baseline setting. I just reinstalled my stock, non adjusted spare air flow meter for our race this weekend to experiment with this theory.

Hope this helps, especially those that bought our regulator set-up! As always, we always technically support our products, so feel free to email me if you want to speak on the phone or have more detailed questions. And, these are personal findings and advice that should not be taken as gospel without proving them on your own. Having an AF gauge, fuel pressure gauge, and preferrbly dyno time is always the best way to do this.

[JRHille]

Get an AF gauge! One that you can monitor real time in the car is best, the innovate LC-1 and DB gauge combo we sell works great, and as an added bonus, I believe you can integrate it with a data system too.

As for baselines, the factory pressure on a 1.6 should range around 35 I believe, so start at what your pressure was to begin with and work your way up if on the dyno. I have heard 38 works well. The point is to push as much fuel as possible without going too rich on the afr gauge.

Air/fuel ratio is going to depend on whether you want more torque or horsepower, and balancing it with the best dyno results. For example, a high speed track that doesnt require much down low grunt, running in the 13:1 - 13:5 range might work good. For tracks that require some down low torque, mid-range, or to pull out of a 2nd gear hairpin, you might find running in the high 12:1 range would be better, like 12.5:1 and up.

Also, I have heard that using the stock setting on the air flow meter is a good baseline setting. I just reinstalled my stock, non adjusted spare air flow meter for our race this weekend to experiment with this theory.

Hope this helps, especially those that bought our regulator set-up! As always, we always technically support our products, so feel free to email me if you want to speak on the phone or have more detailed questions. And, these are personal findings and advice that should not be taken as gospel without proving them on your own. Having an AF gauge, fuel pressure gauge, and preferrbly dyno time is always the best way to do this.

Thank you thank you! I have an AIM mxl2 dash so I think I could find a sensor for it to monitor air fuel!