Holley HP EFI conversion

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01-05-2021, 11:23 AM

#161

sutphen 30

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Quote:

Originally Posted by ICDEDPPL

Crank trigger seemed like a paint in the a$$ to move pullies and install on my set up, more expensive too.
Dual sync way easier.
Unless you`re going over 7,000 rpm dual sync will work just fine.

did you cut the snout of harmonic balancer down?thats how I did it then its an easy install

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kvogt (01-05-2021), Panther (01-05-2021)

01-05-2021, 12:02 PM

#162

ICDEDPPL

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I didn`t like that option, still more expensive and unnecessary imop.

01-05-2021, 04:00 PM

#163

Panther

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Quote:

Originally Posted by b18cls1

ive been running the hp with a dual sync dist and daytona sensors cdi box for a while now theres documentation out there for it, dosent matter if its a dominator a hp or terminator its all the same setup.

What you're writing is exactly what I'm talking about and they don't have documentation on it. There's no documentation out there on firing a single ignition coil NOT using a CD box and controlling the timing through the ECU.

What you're doing is running a single coil but the CD-1 is firing your ignition using the points output. The HP and Dominator cannot fire a stand-alone coil unless you use a CD ignition OR you have to run a Sniper ignition module.

01-05-2021, 04:02 PM

#164

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Geronimo36

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Quote:

Originally Posted by b18cls1

what crank trigger you run that clears the lower alt mount?

been thinking of swapping over to a crank trigger from my distributors

36-1 crank trigger

01-05-2021, 04:09 PM

#165

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Geronimo36

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Quote:

Originally Posted by Rookie

Sweet setup!
I jumped the shark a month ago and bought dual sync and coil near plug setups. It wasn't the least expensive way to go, but I believe it was the right way to go.

Thanks! Carbureted it made 960hp and with this stetup it made 975hp out of the gate. I ran a smaller upper pulley to get the boost up and it made just under 1000 hp at 6psi. With a bigger blower it could have done a lot more.

01-05-2021, 06:08 PM

#166

sutphen 30

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Quote:

Originally Posted by Panther

just turn up that correction factor,,easy 1k hp.

01-05-2021, 06:57 PM

#167

Rookie

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Quote:

Originally Posted by ICDEDPPL

You don`t need an additional box to run coils.
HP and Dual sync is all thats needed.(and a couple subharnesses)

Quote:

Originally Posted by Panther

.
DId you figure this out how to fire a single coil without the box? This is the answer to the question I had a few pages ago.
.

Quote:

Originally Posted by Rookie

I'm going to need some advice on coils and ignition boxes. (do I still need a box if I use the HP computer?)

Quote:

Originally Posted by ICDEDPPL

You don`t need an additional box to run coils.
HP and Dual sync is all thats needed.(and a couple subharnesses)

Quote:

Originally Posted by Rookie

Even if I am not running coil over? Just single coil using the distributor to supply spark.

01-05-2021, 07:20 PM

#168

b18cls1

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Quote:

Originally Posted by Panther

I’m sure you figured it out but it’s just a simple Bosch inductive igniter.

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01-06-2021, 08:08 AM

#169

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Geronimo36

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Quote:

Originally Posted by b18cls1

I’m sure you figured it out but it’s just a simple Bosch inductive igniter.

That's correct, there isn't documentation out there from Holley on it. They just assume that you're going to either use a CD Box, GM distributor or coil on plug. They have documentation for the Sniper system for a single coil with no box but not the HP or Dominator. I figured it out on my own a few weeks ago.

https://www.holley.com/products/fuel.../parts/556-150