Bill_VA
05-05-2022, 08:27 PM
After 16 years, I had enough of carburetors. I started with an Edelbrock (total crap), replaced it with a Demon (would stall under hard braking, and finally a Quick Fuel (cold and hot natured and would leak fuel into the intake after engine was off.
I did some homework and got some good advice from Scott Evans at www.efisystempro.com, and decided on the Holley Terminator X Stealth 4150. I wanted to have the ECU control the spark too, so I also went with a Sniper HyperSpark distributor. I had a mechanical fuel pump, so I had to also replace all the fuel plumbing.
166279166280
One other major task was replacing the headers. I had FFR 4 into 4 headers that fed my relatively new Gas-N stainless steel side pipes. There is absolutely no room for an O2 sensor in the side pipes. I ordered a set of Gas-N stainless headers with the pivot collector with an O2 bung. Note: the band clamp on the pivot collector will not be enough to hold the side pipes in place, so you'll have to have them tack welded to keep everything in place after you get it all lined up.
166284
Since my water temp port on the intake was already occupied by my existing sensor for the fan and temp gauge, I had to drill and tap the intake near the thermostat housing for a new sensor for the fan and gauge, freeing up the existing port for the new EFI temp sensor.
166285
I also did a LOT of integrating/rewiring/customizing of the provided Holley harnesses (two for the EFI and one for the spark box. With space being so limited under our hoods and the harnesses being designed to accommodate even the largest of Detroit iron, I took all the looms apart, removed stuff I didn’t need, shortened/lengthened several wires to make it perfect for my car.
166281166283166286
I mistakenly mounted the spark box right next to the ECU (supposed to be a no-no for electro magnetic and radio frequency interference), so I made an aluminum shield and mounted it around the CD box and the solution turned out perfectly. The data logs show no interference at all.
166282
Scott at www.efisystempro.com (https://www.efisystempro.com) is so the man! He fielded a ton of emails and provided quality feedback and advice. I’m so glad I went through EFI System Pro instead of ordering from Amazon or Summit Racing. Scott also has reviewed my datalogs and provided global setup files that have made a huge change to the way my car runs.
By the seat of my pants, this EFI system is making a substantial amount of additional power. My power band has definitely changed/improved. The ability to push my start button and have the engine actually start, no matter how hot or cold the engine might be is priceless (I wish, it was closer to $4200).
Here’s what I used:
TERMINATOR X STEALTH 4150, SHINY 550-1001
SNIPER EFI STEALTH 4150 BRAIDED FUEL CROSSOVER KIT 534-236
SNIPER 340 LPH FUEL PUMP MODULE 12-345
SNIPER EFI HYPERSPARK IGNITION COIL 556-152
SNIPER EFI HYPERSPARK DISTRIBUTOR 565-302
SNIPER EFI HYPERSPARK CD IGNITION BOX 556-151
Terminator to HyperSpark Distributor Adptr Harness 558-323
I did some homework and got some good advice from Scott Evans at www.efisystempro.com, and decided on the Holley Terminator X Stealth 4150. I wanted to have the ECU control the spark too, so I also went with a Sniper HyperSpark distributor. I had a mechanical fuel pump, so I had to also replace all the fuel plumbing.
166279166280
One other major task was replacing the headers. I had FFR 4 into 4 headers that fed my relatively new Gas-N stainless steel side pipes. There is absolutely no room for an O2 sensor in the side pipes. I ordered a set of Gas-N stainless headers with the pivot collector with an O2 bung. Note: the band clamp on the pivot collector will not be enough to hold the side pipes in place, so you'll have to have them tack welded to keep everything in place after you get it all lined up.
166284
Since my water temp port on the intake was already occupied by my existing sensor for the fan and temp gauge, I had to drill and tap the intake near the thermostat housing for a new sensor for the fan and gauge, freeing up the existing port for the new EFI temp sensor.
166285
I also did a LOT of integrating/rewiring/customizing of the provided Holley harnesses (two for the EFI and one for the spark box. With space being so limited under our hoods and the harnesses being designed to accommodate even the largest of Detroit iron, I took all the looms apart, removed stuff I didn’t need, shortened/lengthened several wires to make it perfect for my car.
166281166283166286
I mistakenly mounted the spark box right next to the ECU (supposed to be a no-no for electro magnetic and radio frequency interference), so I made an aluminum shield and mounted it around the CD box and the solution turned out perfectly. The data logs show no interference at all.
166282
Scott at www.efisystempro.com (https://www.efisystempro.com) is so the man! He fielded a ton of emails and provided quality feedback and advice. I’m so glad I went through EFI System Pro instead of ordering from Amazon or Summit Racing. Scott also has reviewed my datalogs and provided global setup files that have made a huge change to the way my car runs.
By the seat of my pants, this EFI system is making a substantial amount of additional power. My power band has definitely changed/improved. The ability to push my start button and have the engine actually start, no matter how hot or cold the engine might be is priceless (I wish, it was closer to $4200).
Here’s what I used:
TERMINATOR X STEALTH 4150, SHINY 550-1001
SNIPER EFI STEALTH 4150 BRAIDED FUEL CROSSOVER KIT 534-236
SNIPER 340 LPH FUEL PUMP MODULE 12-345
SNIPER EFI HYPERSPARK IGNITION COIL 556-152
SNIPER EFI HYPERSPARK DISTRIBUTOR 565-302
SNIPER EFI HYPERSPARK CD IGNITION BOX 556-151
Terminator to HyperSpark Distributor Adptr Harness 558-323