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Fuel Injection how do you like it

It sucks donkey balls! My dad has it on his 505, friggin thing pings anytime you get on it. Can’t adjust much, his timing is at 5 on idle. Nothing I do will fix it. Now if you just want it to run, it may work for ya, this is mine/dads experience.
 
So then we are down to 2 of them the sniper with a slight mod to the manifold will work and fitech how is the msd
 
It will. Just notch the divider wall.
After doing a little research that manifold is notched already just like the RPM manifold.I did call Holley I hope their tech line is not like the guy I spoke to today I presented the question of the intake issue he could not answer and was not familiar with the product I was using that being said all he had to say was it caused turbulence on a dual plane
 
Since it does have a notch, then it’ll run just fine.
 
I've had the Holley Sniper on the 440 in my Satellite for about a 18 months now. Just added their Hyperspark distributor for timing control about a month ago. It ran good without the timing control, better throttle response than I could ever get out of the carb that was on it before, now that I've added the timing control it idles and runs smoother than ever. No hesitation or jerking trying to idle along at 5 mph in first gear. Super easy to adjust your timing settings right from the drivers seat.
I haven't had any issues at all with it other than a couple of minor tuning adjustments that I had wrong, it's run great for me. I've put about 2000 miles on it since installing the sniper and a few hundred in the last few weeks with the timing control. Very happy with it.
 
I have looked at some 3x2 TBI and DPI EFI systems, for my 440 6bbl and my wife's 421 Tripower GTO.
I had just sent my 3 good (not perfect) running Holley 2bbl carbs to Promax for ALL of their mods: jetable metering plates in the outboard carbs, angled idle mixture screws on the throttle plate section on the rear carb, their metering block on the center carb, repair 1 of the 4 screw holes on the accelerator pump diaphragm on the center carb. Also to rebuild any or all 3 of them with the correct parts if needed. I had rebuilt the center carb with a kit I bought at O'Reilly's, and ran it for some time, but I was concerned that there may be inherent deficiencies with that. I also had them "pretune" the carbs by running them on their dyno mule, a 440 with the same cam I believe I have...Lower and upper stainless steel braided fuel lines too....
So after making that $1,400 investment in 3 carbs that were installed and running before I sent them to Promax, then I discovered the FiTech 3x2 EFI system. :rolleyes:
When I got the carbs back from Promax, it was a couple of days before Cruisin the Coast, an annual 8 day event that is a LOT of cruising around and the biggest event of my year. I had also just got the 3 Rochester 2bbl carbs back from being "restored" by a company in Florida, All American Carburetors. The problem with what they did was failing to modify the Rochesters to get the most out of the high performance parts, roller cam, etc that went into a recent rebuild of the 421. With all of the well planned, high end components that went into the 421 engine build, it should have performed better at the track, and I was still having some heat soak related issues too.
The Promax modded carbs RAN LIKE CRAP for the whole week of Cruisin the Coast, so I was pretty pissed off. It turns out that some braid clippings were in the brand new fuel lines I had installed but hadn't flushed out, because I was pressed for time and they were brand new after all.
Once I cleaned them out, and cleaned out the 3 Holley carbs, metering block, etc they ran FINE. The Rochesters still have to be sent to someone with experience and a great reputation for doing what needs to be done to make them work their best with a performance modified engine. If his modifications fail to provide the results we are looking for, THEN EFI in a 3x2 system is the next move for the 421.
That's a LONG way of saying that EFI can solve a lot of problems, with a lot less pain and guesswork.
 
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For me it's not tuning issues I have done mods with alot of help from other members the thing that I can no longer live with is percolation issues and the vapor lock I am done my wife does not want to come out any more do not know if its going to start or if the car sits for more than a day it is forever to get the fuel to the front
 
my wife does not want to come out any more do not know if its going to start
In our case, we take both the Roadrunner and GTO. If she has problems with the way her car runs, or worse, kills and won't start, well let's just say it's hard to do an initial diagnosis over the phone when she's screaming so loud I can't make out the words...
:cursin:
I spent $700 on having the 3 Rochesters restored, and they are beautiful, but I am going to have them reworked to match the build specs on the 421 and see.
It's more likely that the 421 will get EFI for her happiness and reliability than my Promax modded Holley carbs would be replaced with EFI.
 
4D105707-FDB1-46C8-BE1E-8985B21497F4.jpeg
I’ve been running up and down the Coast for three days. Starts and stops with Linda along. EFI has been a godsend. Yes, it’s sea level and in the 70’s but restarts, short trips have been so easy with the Pro Flo 4. Worth every penny. A real touring car. This pic approaching Los Osos and the PCH.
 
I can't wait to see the car in person.
It's going to be really popular at Cruisin the Coast!
 
Hello everyone I was thinking about purchasing the Sniper set up please share your stories how do you like it better then old fashioned carburetor

I've helped tune about a dozen Sniper setups now plus I run a Sniper on my own B body. I have a Holley port injection setup on my Duster and I used a Holley port injection on my big block race engine. The Sniper is a super nice system with a lot of capabilities that people don't even know about. You get data logging and the capability of laptop tuning with the Sniper. If you buy the Super Sniper you get 3 channels of additional data logging that you can use to track and solve lots of little problems. If you invest in the correct sensor you could use the Super Sniper to monitor transmission pressure, brake line pressure, crankcase pressure, power steering pressure, fuel pressure, oil pressure, etc. I've been doing that stuff with my car but I don't many other people doing it. Once I show people what the Sniper can do they are just amazed. I'll have people lean over my shoulder looking at the laptop and asking tons of questions. Fast idle, start retard, high speed retard, launch control, full ignition timing control, built in vacuum advance, etc. Most people just don't understand how much capability is inside the Sniper.
 
Sniper setups
Yeah...I've been checking in on the patent for a Holley Sniper 3x2 system that was filed a couple of years ago. They recently updated it. Unfortunately, I have no information on if it's in development or what.
I like the simplicity and price point of the FiTech 3x2 system, but I'm already $1,400 in on Promax parts and labor on my 3 Holley 2bbl carbs, so I want to go with them for now. The other concern is the 600 HP rating on the FiTech, as that would be my target HP, with torque at 650+ for a stroker build. The F&B direct port injection 3x2 system I'm sure is more flexible and capable of more power than the FiTech, but at appx $2800 PLUS about $4k for a control system on top of that makes it pricey. There is a yellow and black Roadrunner forum member who has the F&B in black that I need to follow up with, to find out what I can.
So...the Holley Sniper 3x2 system may be ideal, IF they ever make it.
 
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