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Sniper Efi Distributor Help

1969 beep beep

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I need some help with my sniper system. I am currently using an msd 8545 pro billet distributor on a 400 block with stealth heads. I had to clearance the corner of the valve cover a small amount to get the msd distributor to work. I am currently not using timing control but would like to change it to timing control.

Holley recommends replacing the msd with the Hyperspark. I know I could use my old msd but would need an adjustable rotor and an old cap for phasing. Holley recommended the Hall effect sensor route.

I know the dual sync is also an option but I wouldn’t be using the cam sensor option. I think the height of the dual sync is similar to the msd 8545.

Has anyone used the Holley dual sync or Hyper spark on B block with stealth heads? Will any of these work or will I have to clearance the heads? Not sure if one will work better then the other.

Using the Holley would obviously make it easier to setup over the Msd.

Any feedback or picks would be great.

Thanks
 
I just installed the Hyperspark on a 383. Stock 906 heads though. I did not have to clearance the heads or valve covers to make it fit. The edge of the cap is very close to the valve cover but not hitting. I'll take a picture of the setup when I get back on it.
Mopar Performance Black wrinkle valve covers just to let you know the setup. Let me get the hyper spark number I used. I believe this is the one I installed. Also using the sniper to control timing. The distributor comes with a clear cap to phase the distributor. Pretty simple setup to be honest. I don't know about stealth heads. I would assume they are called stealth because they have the same look as a stock head? Anyhow the part I used is below.

https://www.summitracing.com/parts/...qGApEm0I1qh6HIFd3NZJz1g9UDuKn4LRoCIcgQAvD_BwE

Used this CDI box.
https://www.summitracing.com/parts/sne-556-151
sne-556-151_xl.jpg



And this coil.
https://www.summitracing.com/parts/sne-556-152

sne-556-152_xl.jpg

Holley Sniper 565-305BK
sne-565-305bk_xl.jpg


 
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I use the Hyperspark distributor on the 383 in my Coronet with stock heads. It fits, didn't have to grind anything. Stealth heads are a copy of the stock heads so that shouldn't be an issue. I am using stock valve covers but I did have three different sets of aftermarket ones on there previously and I didn't have to mess with any of them to get the distributor to fit.

The Hyperspark is basically an MSD distributor with slightly different parts inside. The cap even says MSD on it. If you want to control timing (you do!) don't even think twice about it.

Excuse the blue wires, had some get burned on the headers.
IMG_2330.jpg


With aftermarket valve covers.
IMG_1061.JPG
 
If the hyperspark is essentially an msd body you’ll have to grind the heads I would imagine. I have an msd ready to run on an eddy head and had to clearance the corner of the head and the valve cover..
 
If the hyperspark is essentially an msd body you’ll have to grind the heads I would imagine. I have an msd ready to run on an eddy head and had to clearance the corner of the head and the valve cover..

Again, no clearance required with either the stock or Stealth heads which are an aluminum copy of a stock head.

As you stated from first-hand experience, it's well known that the more brick-like aluminum heads such as Edelbrock, Trick Flow, Indy, etc. usually require some grinding to make an MSD/Holley distributor fit.

Seems crazy the distributor clearance issue still exists with the Edelbrocks, etc. Gotta love having to break out the grinder on brand-new castings to make them work with certain parts. :realcrazy:
 
Well that’s good news. Don’t have to clearance the heads.

Thank you guys for the info. What do guys recommend then Hyperspark or dual sync?

I read some issues with the distributor shaft not going deep enough in the distributor gear. Does anyone know if Holley corrected this?
 
Again, no clearance required with either the stock or Stealth heads which are an aluminum copy of a stock head.

As you stated from first-hand experience, it's well known that the more brick-like aluminum heads such as Edelbrock, Trick Flow, Indy, etc. usually require some grinding to make an MSD/Holley distributor fit.

Seems crazy the distributor clearance issue still exists with the Edelbrocks, etc. Gotta love having to break out the grinder on brand-new castings to make them work with certain parts. :realcrazy:

Ahhhh, wasn’t aware stealth was direct copy oem, good to know. TOTALLY agree that all the head manufacturers should be a little more on the ball with casting designs. Grinding was an eerie feeling at first, but no one sees that area when your done and the distributor is installed anyway.
 
I would say Hyperspark, no problems with mine. Even I managed to set up the Hyperspark distributor correctly and if that's the case, anyone can.

AFAIK, the Dual Sync is for sequential systems that require a cam sensor input. Also, if I'm not mistaken, to use them for TB EFI they require a crank trigger. Suppose if you go either route in the near future it might be a wise investment but I don't see any reason to use the DS if you're just using a Sniper.

What ignition system are you going to use? If you haven't chosen that yet, I'd use the Hyperspark ignition and coil. I'm not a fan of spending other people's money by suggesting more Holley stuff but it really does make life easier if you buy the whole thing since it was designed to work together. You can make other-brand stuff work but there's always a hoop or two to jump through and sometimes you get into uncharted territory when dealing with setup problems or drivability issues down the road.

Only problems I've had with my setup so far were caused by 'operator error' and not with the components themselves.
 
I am already running the digital 6al box. That should do the trick.
 
Might want to make sure that MSD box will play nice with the ECU in order to enable timing control. I could be wrong but there may be something to that idea.

Go on the Holley forums and look around to confirm these parts will work together to do what you want.
 
I like spending other peoples money. But in this case it was necessary. The owner of the car is afraid to drive it far. He thinks its going to break down on him. All this stems from the one time he and I drove about 30 miles and we stopped at a gas station and it would not fire up. 30 minutes later I jumped the ballast resistor and it fired up and drove it home. Then suddenly 2 weeks ago it just lost all fire. I tried 2 coils and another distributor. Turns out the orange box took a dump. So he decided that he didn't care how much money it took he wanted it reliable. So we went Hyper Spark.
 
I just installed the Hyperspark on a 383. Stock 906 heads though. I did not have to clearance the heads or valve covers to make it fit. The edge of the cap is very close to the valve cover but not hitting. I'll take a picture of the setup when I get back on it.
Mopar Performance Black wrinkle valve covers just to let you know the setup. Let me get the hyper spark number I used. I believe this is the one I installed. Also using the sniper to control timing. The distributor comes with a clear cap to phase the distributor. Pretty simple setup to be honest. I don't know about stealth heads. I would assume they are called stealth because they have the same look as a stock head? Anyhow the part I used is below.

https://www.summitracing.com/parts/...qGApEm0I1qh6HIFd3NZJz1g9UDuKn4LRoCIcgQAvD_BwE

Used this CDI box.
https://www.summitracing.com/parts/sne-556-151
View attachment 1151239


And this coil.
https://www.summitracing.com/parts/sne-556-152

View attachment 1151240
Holley Sniper 565-305BK
View attachment 1151241
Where did you install the 556-151?
Also where are you getting power from?
I have the 550-872 Sniper Stealth EFI with the pink wire going to the ballast(drivers side).
I have the Hyperspark 565-306 that I want to now install, but need another source for the pink switched wire.
I customized my top retainer.

IMG_1818.JPG
 
Where did you install the 556-151?
Also where are you getting power from?
I have the 550-872 Sniper Stealth EFI with the pink wire going to the ballast(drivers side).
I have the Hyperspark 565-306 that I want to now install, but need another source for the pink switched wire.
I customized my top retainer.

View attachment 1162040
I think I used the same wire I hooked the sniper pink to. I'll have to go look its been longer than an hour so I don't retain information very long lol.
 
I see the instructions for the cdi box 56-151 says: "Ballast Resistor: If your vehicle has a ballast resistor in line with the coil wiring, it is recommended to bypass it." I take it this means no wires from this system will go to the ballast resistor and the ballast resistor can be removed? Would that be correct?
 
I see the instructions for the cdi box 56-151 says: "Ballast Resistor: If your vehicle has a ballast resistor in line with the coil wiring, it is recommended to bypass it." I take it this means no wires from this system will go to the ballast resistor and the ballast resistor can be removed? Would that be correct?
Yes. Either connect the wires together, or if you want to keep the resistor for looks, you have to connect the terminals together and silicon it in. It’s basically the same as connecting the wires together, just hidden in the ballast framing.
 
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