Holley Sniper

[Green411]

So far as I can make out,
37*c = 400 ohms
40*c = 370 ohms
50*c = 250 ohms
60*c = 165
70*c = 121
75*c = 100
77*c = 91
80*c = 87
But these were done with hot air gun or hot water so not necessarily that accurate!

[Green411]

Well the job's finished.
After connecting 6 wires, connecting the hand-held terminal provided, entering the basic engine data, you key-off to save the data and create the base map for starting. Then key on, check the fuel pump runs and primes the system, and start. It cranked for 5 seconds or so....... then it fired cleanly. And with not one iota of drama it immediately settled into a steady fast idle…..Whew…………….
All I’ve got to do now is hope it was worth it.
THe Sniper self-learns the fuelling as you drive (timing is still from the distributor) so I'll report back once I've driven it a bit.
There'll be an article about it in a future Bodacious, I hope.
Thanks for your interest. And patience!

[AndrewA]

The self learning sounds fun...do you teach it what foot to the floor means first or save that part of its education until later?

[David C]

Encouraging progress! Do you have plans to add the Hyperspark distributor so that the Sniper can control ignition timing?

[David C]

Back to other ways of improving fuel consumption - A bit of research suggests that the 383 is internally balanced so it should be fairly straightforward to adapt to a 46RH transmission with an adapter plate and spacer for the flex plate. PATC amongst others have them readily available, but at about $800.

[Green411]

Well..........

Haven't driven on the roads yet as there's not been enough rain in my area (west of Cambridge) to wash all the winter salt off the roads. So I've fired 'er up a few times and run up to temperature, mainly because it felt good and I'm still getting used to my lovely old 411 actually starting when asked to, instead of doing the automotive equivalent of saying 'Shan't' and stanping it's pretty little foot....

I noticed that tuel gauge wouldn't register so I took the sender out to check the float for a puncture and test the resistence as the float arm moved. All was ok, although there's no reading at the very bottom of the float arm's travel. In the end all I had to do was clean the sender's earth terminal and off on it's travels went the gauge needle, into the heady reaches of roughly half full.

The old 383 was happily idling away after 3rd start when it just coughed and cut out...aah....

Fuel pump wouldn't run with ignition on but ran normally when earthed. Pink ignition wire and red & black main battery connections all had power. Main Sniper fuse was intact. The HHT couldn't find the ECU when connected so the conclusion was (ie my Responsible Automotive Adult Julian said that) the ECU was dead.
I rang Holley Tech and they gave me some tests to do, all of which I'd just done under Julian's eagle eye. So Holley Tech agreed with Julian that as it was all connected correctly, power was available, then the ECU had failed. As it was less than 90 days since purchase it was down to the vendor (Summit) to replace it.
I've emailed Summit and they asked for quotes to send the unit back, which I've provided, and they're thinking about whether they want it back or not.

Anyway, at least my Anglo-saxon copulative vocabulary has had some excercise even if my 411 hasn't...
Will update further when something happens.

[AndrewA]

Thanks for the update - sorry to hear you've product issues.
Giving stuff back to the States is a real pain when it doesn't work or is not as described - hope it's sorted soon.
Great that when it was working it was idling happily.....looking forward to the next instalment.