New to Fast b2b with alky

[chasmat2316]

I've had alky for awhile but new to tuning with FAST ,AFR is all over the place, should I turn off the correction ?

 

[Reggie West]

Read this thread. I asked the same question

http://www.turbobuick.com/forums/alcohol-nitrous-propane-tech/224696-f-number-drop-alky.html

 

[Razor]

Is air fuel ratio all over the place without alky?

Set the boost to like 15 PSI.. get it to not make corrections.. then switch on the alky.. and start tuning it where there is no correction.

If your trying to figure out the car at 25 PSI without having 15 PSI sorted out first... then you will have trouble.

 

[chasmat2316]

Is air fuel ratio all over the place without alky?

Set the boost to like 15 PSI.. get it to not make corrections.. then switch on the alky.. and start tuning it where there is no correction.

If your trying to figure out the car at 25 PSI without having 15 PSI sorted out first... then you will have trouble.

The a/f without alky is good, tuned fat around 11.5 without much correction. I've read to shoot for mid to high 10's with alky, but do I turn the fuel correction off on the FAST - NOT Allow the box to have control of adding fuel? thanx Charlie

 

[Razor]

The a/f without alky is good, tuned fat around 11.5 without much correction. I've read to shoot for mid to high 10's with alky, but do I turn the fuel correction off on the FAST - NOT Allow the box to have control of adding fuel? thanx Charlie

Charlie,
11.5 is no where near fat... especially on a Buick. Most of the engine tuners I know off typically will tune a Buick at 10.8-11.0 on Race Gas. 11.5 is what most Supercharged cars get tuned too.. and thats not fat by any means.

So once you have your baseline tuned at 11.5, then change your target to 10.6. Take out 15% out of the VE table at the 15 PSI mark. Leave your correction on at +25,-5 and proceed to tune it. And make sure you stay in gear long enough to not allow other corrections like accell enrichment, coolant, etc.. from playing a role.

Dial it in.. so it does no correction at 10.6 at 15 PSI. Then based on what you see on your VE tables, you can interpolate what the numbers will be above it in the VE. Example you have 55-60 VE at 15 PSI boost. At 20 PSI you'll be at 58-63. At 25 PSI you'll be at 63-68. These are all examples.

So do you turn the correction off.. No. You need to move the target that tells it where you want to go.. and fix the VE table.

Piece of cake :biggrin:

 

[chasmat2316]

Charlie,
11.5 is no where near fat... especially on a Buick. Most of the engine tuners I know off typically will tune a Buick at 10.8-11.0 on Race Gas. 11.5 is what most Supercharged cars get tuned too.. and thats not fat by any means.

So once you have your baseline tuned at 11.5, then change your target to 10.6. Take out 15% out of the VE table at the 15 PSI mark. Leave your correction on at +25,-5 and proceed to tune it. And make sure you stay in gear long enough to not allow other corrections like accell enrichment, coolant, etc.. from playing a role.

Dial it in.. so it does no correction at 10.6 at 15 PSI. Then based on what you see on your VE tables, you can interpolate what the numbers will be above it in the VE. Example you have 55-60 VE at 15 PSI boost. At 20 PSI you'll be at 58-63. At 25 PSI you'll be at 63-68. These are all examples.

So do you turn the correction off.. No. You need to move the target that tells it where you want to go.. and fix the VE table.

Piece of cake :biggrin:

Hi Razor what I meant to say was I'm on the fat side of 11.5 -my A/F is realy 11.3 on gas only. So I should target 10.6 with no correction with out Alky? then pull 15% out of VE, then turn on Alky leaving the Fast able to correct.? I'm glad to have my questions answered by the King of Alky- Thanx for all the info! Charlie

 

[Razor]

Hi Razor what I meant to say was I'm on the fat side of 11.5 -my A/F is realy 11.3 on gas only. So I should target 10.6 with no correction with out Alky? then pull 15% out of VE, then turn on Alky leaving the Fast able to correct.? I'm glad to have my questions answered by the King of Alky- Thanx for all the info! Charlie

No. You target 10.6 no correction WITH alky.

To do so, you will need to pull fuel from your VE tables. The FAST will tell you if its rich or lean.. then you need to add/subtract fuel until you hit your target.

You may need to pull 15%.. maybe 20%.. depending how much alcohol is being injected. The more alcohol you shoot in.. the more fuel you'll be pulling. As long as there is no knock.. your alky amount is correct.