HOlley Hp Efi and Boost with Stock Coils... Problems?
HOlley Hp Efi and Boost with Stock Coils... Problems? Copied from another thread so as to not fill the OPs thread with stuff.
Can we talk about this and maybe get a little more in detail please?
I seriously ordered an HP efi this morning, and would like some feedback, ive not heard of this issue at all before it was brought up.
Also, Not sure if it matters, im using truck coils...
EDIT: Do the Ford guys have COP?
Can we talk about this and maybe get a little more in detail please?
I seriously ordered an HP efi this morning, and would like some feedback, ive not heard of this issue at all before it was brought up.
Also, Not sure if it matters, im using truck coils...
EDIT: Do the Ford guys have COP?
Last edited by JAX04; Feb 27, 2012 at 02:48 PM.
I got the Holley unit and I was specifically told not to even bother with the coils and just order the coils that Holley offers. They told me that if I use anything other than the coils they sell. That I have an extremely high chance of frying the Holley Unit. I was told that the HP/Dominator do not have high output coil voltage.
Hopefully this make sense for some one. I read it on another forum.
"DIS/COP does not use CD Igntion (MSD/Mallory etc) due to the increased saturation time the coils have to charge and provide high spark output. Holley and BS3 both utilize low current coil drivers designed for "smart 4 wire coils" like GM LSx or Holley's DIS wastespark coils. Think of these coils as being wired like a relay with high current feed/low current trigger. Ford coils are high current driven and will require an auxiillery high current driver which Holley has in the works for next year. Back to back dyno testing has shown identical horsepower in LSx and Wastespark coil configuration at moderate boost levels (14-18psi)"
Hopefully this make sense for some one. I read it on another forum.
"DIS/COP does not use CD Igntion (MSD/Mallory etc) due to the increased saturation time the coils have to charge and provide high spark output. Holley and BS3 both utilize low current coil drivers designed for "smart 4 wire coils" like GM LSx or Holley's DIS wastespark coils. Think of these coils as being wired like a relay with high current feed/low current trigger. Ford coils are high current driven and will require an auxiillery high current driver which Holley has in the works for next year. Back to back dyno testing has shown identical horsepower in LSx and Wastespark coil configuration at moderate boost levels (14-18psi)"
I got the Holley unit and I was specifically told not to even bother with the coils and just order the coils that Holley offers. They told me that if I use anything other than the coils they sell. That I have an extremely high chance of frying the Holley Unit. I was told that the HP/Dominator do not have high output coil voltage.
Hopefully this make sense for some one. I read it on another forum.
"DIS/COP does not use CD Igntion (MSD/Mallory etc) due to the increased saturation time the coils have to charge and provide high spark output. Holley and BS3 both utilize low current coil drivers designed for "smart 4 wire coils" like GM LSx or Holley's DIS wastespark coils. Think of these coils as being wired like a relay with high current feed/low current trigger. Ford coils are high current driven and will require an auxiillery high current driver which Holley has in the works for next year. Back to back dyno testing has shown identical horsepower in LSx and Wastespark coil configuration at moderate boost levels (14-18psi)"
Hopefully this make sense for some one. I read it on another forum.
"DIS/COP does not use CD Igntion (MSD/Mallory etc) due to the increased saturation time the coils have to charge and provide high spark output. Holley and BS3 both utilize low current coil drivers designed for "smart 4 wire coils" like GM LSx or Holley's DIS wastespark coils. Think of these coils as being wired like a relay with high current feed/low current trigger. Ford coils are high current driven and will require an auxiillery high current driver which Holley has in the works for next year. Back to back dyno testing has shown identical horsepower in LSx and Wastespark coil configuration at moderate boost levels (14-18psi)"
Will Do Josh
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As of this moment, the Holley EFI in a boosted application must run the Holley coils. They have new ECU hardware that should resolve this problem but they are waiting on the firmware to drive it. Once they have both ready, they will be shipping 3 ECU's to us to try on our 3 turbo fbodies with the stock coils. We have a couple of high 8 sec cars and a 7.7 car to run them thru the paces. Once we see them working correctly, we'll let everyone know.
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Here's the latest news straight from the Holley EFI engineers: The earlier HP/Dominator EFI units ran into a resistance issue with boosted applications exceeding 8psi. This has been addressed by running their coils. However, they have since updated the hardware and the new units (produced in 2012) SHOULD no longer have this issue and should be able to run stock coils with big boost.
This is why I waited to purchase a 2012 production unit. I plan on running 30psi with the stock coils....guess I'm one of the test rats.
This is why I waited to purchase a 2012 production unit. I plan on running 30psi with the stock coils....guess I'm one of the test rats.
To add to this...
Ed (formerly of VA Speed) told me it would be April (at the earliest) that Holley would have this issue fixed.
Also, to run the Holley coils means you have to run their 60-2 trigger wheel I believe. And I'm told this wheel sux ***** at rpm.
Ed (formerly of VA Speed) told me it would be April (at the earliest) that Holley would have this issue fixed.
Also, to run the Holley coils means you have to run their 60-2 trigger wheel I believe. And I'm told this wheel sux ***** at rpm.
I don't know if thats 100% true. I was told just to get the coils and I would be fine. And that is directly from them.
Here's the latest news straight from the Holley EFI engineers: The earlier HP/Dominator EFI units ran into a resistance issue with boosted applications exceeding 8psi. This has been addressed by running their coils. However, they have since updated the hardware and the new units (produced in 2012) SHOULD no longer have this issue and should be able to run stock coils with big boost.
This is why I waited to purchase a 2012 production unit. I plan on running 30psi with the stock coils....guess I'm one of the test rats.
This is why I waited to purchase a 2012 production unit. I plan on running 30psi with the stock coils....guess I'm one of the test rats.
By the time i got off the phone with them i knew nothing more then going into the conversation with, except that the boost control should be out in a couple months and they are still waiting on the beta circuit boards to start testing the voltage back feeding problems with the smart coils.
Don't forget the 58 tooth GM trigger wheel is a 60-2 wheel.