Holley Sniper

[David C]

Very pleased to hear all is still well. I have been keeping an eye on the internet for tales of woe about the updated Sniper and have seen few if any.
My installation of overdrive gearbox on the 410 has dragged on for various reasons but I hope to have it back on the road in the next week or so. If all goes well then Sniper and Hyperspark will be next.

[Green411]

I forgot to say in the last post that the fuel pump is a bit noisy, too. I used a Holley 12-131 returnless drop-in fuel module, which has a 255 lph in-tank pump. I added a Hydra-Mat, too, in lieu of a reservoir/swirlpot. All seems to work very well.

[David C]

Do you think it would be a good plan to put some neoprene or similar under the fuel tank and also between the straps and the tank?
Perhaps a bit of Dynamat on top of the tank to damp any ringing.

[Green411]

Hmmm......I must say I hadn't considered anything between straps and tank, or below tank, but I have put as much sound deadening as will fit between the tank front and seat back, and above tank.

[David C]

Next time you have access I suggest you place a hand on the top of the tank with the pump running. If you notice any lowering of noise level then one or two pieces of Dynamat or similar about 6" squareish may well help. If you can feel the pump vibration then decoupling the tank from the bodywork with something resilient is worth a go.

[Green411]

Sorry David C, for some reason (ineptitude?) have only just seen this.
Sounds like sound advice.

[David C]

I'm pleased to report that my 410 is now sporting a Sniper 2 fuel injection unit with hyperspark distributor. First impressions very good other than fairly loud injector tick. A returnless pump went in the tank without too much trouble. I re-jigged the wiring loom to tidy it up and moved the pump relay to the fuse board. The throttle linkage required a fair bit of measuring and a bit of fabrication but otherwise it was surprisingly straightforward.