using AFPR W/turbo

[starfish]

OK so I'm just about ready to put my turbo on my car,but can I use the cheapo AFPR that they gave me with the turbo kit?I only need it for about 3 weeks.Im ordering a Blox 12:1FMU.I need to drive my car back and forth to work every day.Will the AFPR be ok to drive with for awile?Wastegate has 7psi spring.Just got my S-afc but its not hooked up yet.Will I run to lean or rich,I dont want to destroy my motor!

 

[Locke]

If you're going to install the turbo with-out proper fuel management, you should remove the spring from your wastegate. The AFPR will NOT provide enough fuel during boost, you may not make it to your job if you boosted around with it.

No boost until you get the 12:1 FMU (or better) installed.

edit: SAFC won't be of much help to you when you're boosted.

 

[starfish]

so will I need the S-AFC to ajust my a/f mix once I get the FMU ,or is the S-AFC only for N/A cars?The shop that was gonna dyno the car for me said they couldn't tune my car unless I had the S-AFC.If S-AFC wont work what will I need Without spending to much more money?Already spent a fortune.

 

[Locke]

You'll be using nothing at all to tune for boost. The 12:1 is un-tunable, and provides the needed fuel for boost. It has been proven to work for up to ~8psi when used in conjunction with a 255HP fuel pump. I wouldn't go further than 8psi.

Tuneable methods are incompatible with the 12:1. MegaSquirt and PortFueler are tuneable, but would require a 1:1 rather than a 12:1.

 

[starfish]

So right now I have the turbo setup,intercooler,255 hp walbro,getting the12:1FMU,Map bypass valve(blox),I should be Ok without S-AFC.I just bought the dam thing.Will it help any to use it.My wife is gonna kill me!

I just bought the apexi S-AFC for $200.If I cant use It I really need to know so I can send it back to the guy or just sell it to someone who can use it.

 

[Locke]

You can use it for tuning in vacuum if you have a wideband. You may be able to squeeze another MPG or two out of the car with it. It is most useful to us for correcting idle problems when using larger cams.

You could hang on to it for when you decide to get larger cams, or sell it. It still has it's uses.

 

[starfish]

By wideband you mean o2 sensors?I have stock o2 sensors with a/f mixture gauge.If it will help Ill sacrafice the new A/F gauge and buy Wide band gauge w/Wideband sensors

I spent alot of money on shit I dont need now because I listen to guys who dont really know what the hell there doin.Instead of being under the hood my turbo is in the trunk right now because I dont want to take any chances on ruining the motor.I want to make sure I have all the right stuff 1st!Id really appreciate your help.

 

[Locke]

Yes, wideband 02 sensor. It will supplement (not replace) your factory narrowband sensors. The A/F gauge for your factory sensors isn't very accurate, or helpful. I suppose it's better than nothing, but most guys just consider it a light-show of no real value.

You don't need a wideband to use the 12:1. You'll be alright without it, but if you intend on doing anything with the SAFC you'll need the wideband to accurately measure the results of your fiddling. Having the wideband is also helpful for diagnosis of issues.

It's better to be safe than to be sorry. Boosting a 420a isn't quite like boosting a Honda, and is nothing like boosted 4g63's. We have fewer and different options. It's best to get advise from people specifically knowledgeable about the 420a, when possible.

 

[starfish]

so if I get a wide band o2 sensor wil it work with my analog gauge or do I still need digital.if I can do that willmy S-AFC hook up to that setup?

Now I have the top and the bottom sensor,when you say supplement do you mean I only need one wideband sensor (in the front or the back)?this is all very confusing for somebody new with computer contrlled cars.My 1st dodge was a 1969 charger/383

 

[rstare]

You have two O2 sensors. The first, and closest to the exhaust manifold, is used to measure the A/F ratio, and communicate that to the ECU. The second, which is after the catalytic converter, is basically used to see if the catalytic converter is working.
So, you only need one wideband sensor. It's a more accurate version of the first O2 sensor and it's made for your viewing.

Honestly, you don't need a SAFC or a wideband if you're using a 12:1 FMU and only running 8psi.