[GOAT8U2]

I'm frustrated with my Holley dual sync, I'm jumping to 12-1, even Holley tech can't find anything.

Please tell me there's a way to do this?

Thanks

[R 70 Judge]

Yeah there’s a way to go 12X… I just did it

You need this 12X SBC kit and one of the brackets I had made.

https://www.holley.com/products/parts/556-171


If you happen to have a spare MSD Pontiac specific crank trigger, you can use just the mounting bracket with the 12X kit I posted above. Holley/MSD will not sell the bracket separately.

https://www.holley.com/products/igni...its/parts/8650

[R 70 Judge]

I reached out to Funkhouser’s to have more brackets made. No ETA yet. Pricing depends on how fancy I want to get… steel vs aluminum… painted, powder coated or anodized

[GOAT8U2]

Nice, thanks for the quick reply.

How quickly can they make 1?
I'd need it fast and do you have an option B if they can't?
I know plenty of peeps that can get that made for you, and me of course so I'll willing to pull the strings.

My engine was on the chasis dyno having dual sync timing issues so I'm now in limbo.

Thanks

[R 70 Judge]

Originally Posted by GOAT8U2

Nice, thanks for the quick reply.

How quickly can they make 1?
I'd need it fast and do you have an option B if they can't?
I know plenty of peeps that can get that made for you, and me of course so I'll willing to pull the strings.

My engine was on the chasis dyno having dual sync timing issues so I'm now in limbo.

Thanks

Realistically, probably 2-3 weeks. It depends how busy he is.

Plan B for you would be to order both, the Holley crank trigger I posted, and the MSD Pontiac crank trigger and take the Pontiac specific mounting bracket from the MSD to your friend to duplicate. Then return the MSD kit and install the Holley with the new fabricated bracket.

[R 70 Judge]

Crap I just remembered… what harmonic balancer are you running? I’m running an ATI 917730 which has a chebby 3 bolt pattern. The Holley does appear to have multiple mounting hole options (possibly it will fit a 4 bolt Pontiac balancer?). I figured I should mention it.

[GOAT8U2]

Thanks for the tips...

Holley owns MSD, wth, they can easily offer the 12-1 kit for us if you literally need that exact bracket.

I run a fluidampr for the 400, possible bolt on with the available hole options? I'll find out I guess. Hahaha

What did you do for distributor?
You run dual sync, disable crank feature and use as cam sync and oil pump etc?

Thanks, your help and my going in 2nd, we'll be the 2 guineas that will later help the rest make the jump easier.

Buy Holley
Buy MSD
Copy bracket for hall effect sensor
Help them see there's a market so they can use their own MSD bracket in a Holley 12-1 for Pontiacs.

[R 70 Judge]

Yes, Holley has all the parts to do it but they won’t. I spent quite a while trying to talk them into selling the Pontiac MSD bracket separately but they said they couldn’t. In the end I borrowed a MSD bracket from a friend and used it as a template.

The first thing you would need to figure out is if your fluidampr is a 3 bolt or 4 bolt. Mine works because it’s 3 bolt chebby style. After a brief search it looks like the 4 bolt spacing on the fluidampr is more narrow/tighter than stock Pontiac spacing. The Holley 12-1X instructions say it works with a 3 bolt. Looking at the picture it appears the tighter 4 bolt pattern may be an option. I’m just speculating though
https://documents.holley.com/frm36691.pdf

If the 12-1X wheel won’t work with your balancer you could always use the Pontiac MSD crank trigger kit for the signal.
https://youtu.be/2u5B8BaRRXY?si=uEoquPAsm0caNRJU

I use a dual sync distributor (with the short blank cover) for the cam signal. I’m running a Holley coil near plug setup so mine is a little more complicated. The dual sync was struggling a bit with my setup.

Food for thought… my first 12-1X kit came with a MSD Hall effect sensor. It had an intermittent miss. I swapped it for a known good Holley Hall effect sensor and it ran perfect. I sent back the MSD sensor and they replaced it with a Holley sensor (which is on my car now).

Also, there was an update to the dual sync. The modules were going bad. My first dual sync arrived with a dead module. Holley replaced it after an arguing about it. Don’t quote me on this but I think the module was updated in May 2022. Anything prior has the old module. Some work great, some crap out.

[GOAT8U2]

I'm gonna look into all this, really appreciate the fast replies.

My dual sync was from late 2022 on the box. I'll eventually need to figure out how to go just cam sync using this with the crank and Holley Hp.

Oh Ya....
I'll buy your bracket anyways in case all my stuff falls off, let me know what your people need for a price, steel and black etc. Or whatever is fastest.

What did you do for your pulleys after install, spacers?
I'm stock crank pulley, smaller water pump and alternator.

Thanks

[GOAT8U2]

https://www.summitracing.com/parts/f...1/make/pontiac

The fliudampr might work since the Holley 12-1 has a lot of holes in the wheel. I'll report back for sure since this is going to get more and more popular every year for us.

I'll find out in Dec how this works out and this bracket issue thing, I'm up for all 3 options......
Use MSD, buy yours, get 1 made.

I think Holley knows if they offer the Ponti with MSD bracket then they killed off the 4-1 for MSD.

[HWYSTR455]

Pretty sure the Dual Sync modules have a rash of versions, the only version 1 and version 2 of the Dual Sync is the 2nd had powder coated reluctor and other items to help control rust. And they did a mod on the caps to help moisture to escape.

This last Dual Sync I bought appears to be holding up, and not have any issues. But, I may have just got lucky. I actually bought 2 so I have a spare.

I also bought a 24x setup from a board member who makes a kit, the wheel is attached to the back of the balancer, so no pulley spacing required. Unfortunately, machining is required to manufacture the wheel setup, it is fixed to a balancer that is part of the kit, increasing cost (it is a popular SFI unit tho). The pickup has a bracket that fits in place of the fuel pump. Sure you could fab something.

Next time I get a chance I will install the balancer, and when the Dual Sync craps out, will switch to the 24x. I will use the Dual Sync for cam sensor until it craps out, then I will just use a Pro Billet.

Dual Syncs require fine tuning of inductive delay setting, and it's kind of a pain. But once you find the magic number for the setting, you know you can use it from then out.



.

[GOAT8U2]

I wasn't happy with the timing creep on the dual sync, not something worth moving forwards with if this crank trigger was possible, looks like, thanks to R70 Judge there's a path and from there then there's other options to make this happen...

Holley told the engine shop how to do a cam sync only Dual Sync so that'll be a plug and play for clean wiring. I'll see if it's possible to offer this connector after the fact.

I have the 3D Scan. CAD and CNC all in one doing the bracket for the Holley 12-1, BBC kit with a possible line up on the Flyidampr will be known soon.

I'll report back on all this, maybe we'll have a bolt on path to doing this even if Holley doesn't want to offer their kit and kill off the MSD 4-1 crank trigger Ponti offering.

[HWYSTR455]

Timing creep = Inductive Delay

You may have to do it with a crank trigger too. You have to check once it's running.

All you need to do for the crank trigger is un-pin the pins for the dual sync connector and plug in the crank trigger.



.

[R 70 Judge]

Originally Posted by GOAT8U2

I wasn't happy with the timing creep on the dual sync, not something worth moving forwards with if this crank trigger was possible, looks like, thanks to R70 Judge there's a path and from there then there's other options to make this happen...

Holley told the engine shop how to do a cam sync only Dual Sync so that'll be a plug and play for clean wiring. I'll see if it's possible to offer this connector after the fact.

I have the 3D Scan. CAD and CNC all in one doing the bracket for the Holley 12-1, BBC kit with a possible line up on the Flyidampr will be known soon.

I'll report back on all this, maybe we'll have a bolt on path to doing this even if Holley doesn't want to offer their kit and kill off the MSD 4-1 crank trigger Ponti offering.

Just to reiterate, I used the 7” SBC kit for my ATI balancer. You mentioned BBC and I just want to make sure you are looking at the right kit. I don’t know how big (diameter) your Fluidmpr is, but I wanted to mention it again so you don’t get the wrong parts.

Mine is Holley Part #556-171

[GOAT8U2]

Thanks HWY, I'll pass on the picture of the wiring. I'm going for a plug and play connector for the crank to Holley HP.

James, did you need to mess with the inductive delay after your Hall sensor install?

Damn, I've been saying BBC but luckily have your links for the SBC 556-171 Holley kit. Thanks for staying on this and reminding me.

[HWYSTR455]

It's a metripack connector, cake to remove/install pins:

https://www.youtube.com/watch?v=xNKdFBEtQ8Y

In the long run, you're going to need to know how to do this, or you will be paying labor rates that nearly challenge politician salaries for stuff you can easily do.

Here's the link to the HP/Dominator main wiring harness:

https://documents.holley.com/techlib...10555rev16.pdf

Just tryin to help a guy out.

.

[R 70 Judge]

Originally Posted by GOAT8U2

Thanks HWY, I'll pass on the picture of the wiring. I'm going for a plug and play connector for the crank to Holley HP.

James, did you need to mess with the inductive delay after your Hall sensor install?

Damn, I've been saying BBC but luckily have your links for the SBC 556-171 Holley kit. Thanks for staying on this and reminding me.

They did mess with the inductive delay when they got it up and running. It was still a bit erratic. I personally think it was due to the coils I'm using. I've read that they can be a bit finicky.

The Holley BBC 12-1 wheel is 8" OD and the SBC wheel is 7" OD. My ATI balancer (Part#917730) is 7.074" OD. I do not know the OD of your Fluidampr. As long as it is less that 7" you should be good.

https://www.atiracing.com/products/d...dampontiac.htm

[GOAT8U2]

https://fluidampr.com/pontiac-oldsmobile/

Looks like Pontiac Flyidampr is 6 5/8 so the SBC 7" Holley 12-1 wheel like you have might work.

It said bolt holes on the Fluidampr are 3.30.

Darn, I was hoping that maybe it didn't need inductive delay tweaks after it was lined up etc. Hopefully it's way more precise so this will be easy and rock solid.

[R 70 Judge]

Originally Posted by GOAT8U2

https://fluidampr.com/pontiac-oldsmobile/

Looks like Pontiac Flyidampr is 6 5/8 so the SBC 7" Holley 12-1 wheel like you have might work.

It said bolt holes on the Fluidampr are 3.30.

Darn, I was hoping that maybe it didn't need inductive delay tweaks after it was lined up etc. Hopefully it's way more precise so this will be easy and rock solid.

Sorry, I misread what you posted. I was referring to when we were initially trying to use the dual-sync. Once we went to the 12-1 wheel everything worked perfectly. According to my file my inductive delay is set at 100. I just realized that I don’t have both sensors set for digital rising/falling. I think they are supposed to be the same but idk how big of a difference it really makes.

[GOAT8U2]

I'm sure I know this answer but...

You timing checked the base rpm and 3000rpm after the 12-1 install and saw it dead on with those usec 100 settings?

Things are looking good, I'll probably have the spacers for the pulleys available too since it appears as if the Holley wheel pushed out the crank pulley. This means at least 3 spacers will be needed (no AC for me)