Hi Bob,I am looking for people's opinions and experience with the Holley Sniper EFI.
I NEED both pros and cons.
I also NEED to know about performance between 1000 - 2000 rpm.
It would go on a 331 Ford.
I've seen some vid's on replacing the linkage between the primary and secondary to prevent darting of the line (only like a $20 part) Is that something you deem necessary?
No, steady state from 1800 RPM all the way up is fine, smooth and even.Thanks Brien.
So steady acceleration all the way from idle to 3000 or 4000 rpm?
What about cruising steady at 2000 rpm. Still lopey?
Sniper EFI throttle body height is right inline with most any carb out there, holley or edelbrock, so if the air cleaner works with one of them, it'll work with the sniper.Just curious...how is the hood clearance with the Holley EFI (assuming 302 based engine)? Can you fit the large oval cobra air filter?
From my experience with the Pro-Flo I, the timing curves are very advanced, more suitable for a low compression, stock cam engine. At idle, it would blower roll and the IAC and timing would go wild, causing more roll, especially with high compression and lots of throttle response. Steading the low rpm spark advance cured it. I fixed the advance @ idle through 2000 rpm @ 18" to 25 degrees or so. That will stop the hunting/ blower roll. You may have to adjust some of the other low rpm, part throttle timing settings also. Watch the monitor as someone else drives until you get a smooth advance curve with no dips and spikes. I have not seen the parms available on the pro-flo II so your results may vary. I also set initial timing to 8 rather than 10 to be more 93 no lead friendly, so I would not have to reduce all of the advance settings and to keep from replacing starter Bendix gears all the time. My converted HEI distributor was another problem. I replaced it with a Mallory plug-and-play for the Pro-Flo I. Good luck. When it is well-tuned, it will run perfectly, just like you expect it to. I had too much camshaft duration, too much compression, and too big intake port volume, but it ran perfectly. Your wife could drive it in a parade without issue, just don't smack the throttle, things happen fast when you do that.Edelbrock Pro-Flo II