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No BAC and Stock coils on Elite 1500?(first haltech)

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Old 03-17-18, 08:42 PM
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No BAC and Stock coils on Elite 1500?(first haltech)

I have a S4 TIINA (stock motor). I recently purchased the Haltech elite 1500 with the premium harness from Banzai and have a couple questions. The previous owner deleted the BAC, would it be worth it to buy a BAC for the Haltech? The car idled fine on the stock computer just a little high. Also is the Elite 1500 capable of using the stock coils?
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Old 03-18-18, 08:41 PM
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Hey mate.

The Bac can be helpful. Really comes down to where you are located (if you have extremes in weather) Where I am its warm most of the year so it's not as critical, as you noticed it might just idle a bit high. But would be easy and chep to have it reinstalled if your all 100% stock.

It will have no issue running the stock coils.
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Old 03-19-18, 08:58 AM
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look on banzai's site you need to modify the trailing coil to be used for that application by turning it into a direct fire setup. You will need 2 trailing coils to do so.
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Old 03-19-18, 05:08 PM
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Ok thanks guys. Ill search the for sale threads for a used BAC. I have a bunch of stock coils from the motors I’ve collected over the years. Glad to finally find a use for them. Again thanks and hopefully I can start the car soon.
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Old 03-26-18, 07:12 AM
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I'm on a FD but have found the idle control valve to be extremely helpful. I found I was able to achieve a lower, more stable and consistant idle (1600 on a semi peripheral vs 2000 without). It also starts easier and can be tuned for drivability on the roads so that the valve controls the idle instead of the engine just going where it wants based on road conditions with one preset mechanical flowpoint.

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Old 03-26-18, 09:19 PM
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Originally Posted by Skeese View Post
I'm on a FD but have found the idle control valve to be extremely helpful. I found I was able to achieve a lower, more stable and consistant idle (1600 on a semi peripheral vs 2000 without). It also starts easier and can be tuned for drivability on the roads so that the valve controls the idle instead of the engine just going where it wants based on road conditions with one preset mechanical flowpoint.

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Ok I will definitely keep searching for a reasonably priced BAC. eBay has them priced as if they are made of gold.
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Old 03-27-18, 12:56 AM
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I think I still have one on my intake manifold w/ clipped harness plug. Shoot me a little bit of CESH + cover shipping and it's yours. Just checked the garage, it's out at the shop. The little IACV stepper motor one, right?

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Old 03-27-18, 11:34 AM
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Originally Posted by SirLaughsALot View Post
I think I still have one on my intake manifold w/ clipped harness plug. Shoot me a little bit of CESH + cover shipping and it's yours. Just checked the garage, it's out at the shop. The little IACV stepper motor one, right?

Yes it goes on the backside of the upper intake manifold. Close to the boost sensor. If youíve got it Iíll take it.
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Old 03-27-18, 11:41 AM
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Old 03-27-18, 01:15 PM
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Mikey, definitely have one at the shop. I can ship it to you next week.
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Old 04-04-18, 07:45 PM
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BAC Shipped! Keep us all in the loop as to how the tuning goes.
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Old 06-13-18, 03:03 PM
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Originally Posted by SirLaughsALot View Post
BAC Shipped! Keep us all in the loop as to how the tuning goes.
I have everything ready to go and no spark! Maybe I didnít follow Banzai trailing coil mod although I tripled checked it. So Iíve decided to just go ahead and stop ******* around and buy the AEM smart coils. Does anyone know of a kit that comes with everthing included? Iíve seen picutures online of a nice bracket replacing the AC and Power steering.
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Old 06-13-18, 03:45 PM
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Originally Posted by mikey1992 View Post


I have everything ready to go and no spark! Maybe I didnít follow Banzai trailing coil mod although I tripled checked it. So Iíve decided to just go ahead and stop ******* around and buy the AEM smart coils. Does anyone know of a kit that comes with everthing included? Iíve seen picutures online of a nice bracket replacing the AC and Power steering.
Sakebomb garage sells a complete.

SBG RX7 FD IGN-1A KIT

Post a copy of your current tune file in here and I'll gladly take a look and make sure you got everything set up right regardless of whether you keep the stockers or go the IGN-1A route. You'll want to make the software change to direct fire with the coils unplugged, so as not to fry one with what was assigned in the base map as the BAC output. You'll also need to repin the BAC wire at the ecu to another output and reassign that function in the ECU. Its all pretty easy and in my opinion a great upgrade.

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Old 06-13-18, 04:57 PM
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Originally Posted by Skeese View Post
Sakebomb garage sells a complete.

SBG RX7 FD IGN-1A KIT

Post a copy of your current tune file in here and I'll gladly take a look and make sure you got everything set up right regardless of whether you keep the stockers or go the IGN-1A route. You'll want to make the software change to direct fire with the coils unplugged, so as not to fry one with what was assigned in the base map as the BAC output. You'll also need to repin the BAC wire at the ecu to another output and reassign that function in the ECU. Its all pretty easy and in my opinion a great upgrade.

Skeese
I based the tune off the Haltech base map for S7/8 with a single turbo. I left the BAC disconnected for now since I dont have the plumbing connected. I did not unplug the coils at the time of changing the setting to direct fire so I fucked up. Thanks for the second pair of more experienced eyes, really appreciate it.
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Old 06-13-18, 07:49 PM
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Originally Posted by mikey1992 View Post
I based the tune off the Haltech base map for S7/8 with a single turbo. I left the BAC disconnected for now since I dont have the plumbing connected. I did not unplug the coils at the time of changing the setting to direct fire so I fucked up. Thanks for the second pair of more experienced eyes, really appreciate it.
You may have fried the coil, I'm not sure. Will check the file and get back with you. I'm not as familiar with the FC outputs as I am the FD, so I cant say for sure until I look

no worries, I fried an aem coil over it

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Old 06-13-18, 11:36 PM
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I ordered the coils already and hoping that’s the last issue. I’m using haltech water and air temp sensors, low impedance injectors, stock FC CAS, and S4 tps. I haven’t wired in the boost solenoid, BAC, or launch control switch since I just wanna get the car started for now. I’ll get back to you when I install the coils but that may take awhile.
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Old 06-14-18, 01:30 AM
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Glad the BAC made it alright. Keep us in the loop, Mikey!
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