Hello everyone, I’ve recently started working on the car again and I was just curious on if anyone else here has done an EFI conversion with ACES Killshot and if so where did you mount their computer and/or PDM module? How have you liked it so far? Got it on one of their sales so hoping it was worth it. Reviews seem average but that’s expected for a newer EFI when compared to Holley or the others.

Thanks in advance

 

If you remove all the HVAC or change over to Vintage Air it adds a lot of room in the engine bay where the evaporator box used to be. On the other Corvette forum there’s a user named Autowiz that does a lot of aftermarket EFI installs and custom wiring. He builds an electrical center in this spot which looks very clean in my opinion.



There’s still a little room in this area even with the evaporator box. Some people find room in the nose of the car or behind the dash to mount the ECM.

I don’t have experience with ACES, but I probably will in the future with their LS kits.

 

I have the Aces Jackpot in my 82. Harness is long enough to mount the ECU in the glovebox. All wires are labeled well, basically 4 main power connections to get it up and running. enter the engine specs in to the handheld and it fires right up.

 

That looks like a good spot my only worry would be the heat from the side pipes potentially.

Lookin good! I may go with the glove box option, currently there’s my MSD Digital 6AL box in it but that should be able to be removed without th the aces kit since it can control timing and rev limiter correct?

 

I have an MSD ignition system and I now have a Holley Stealth Sniper installed on my 427. One universal thing you have to really plan for is getting the wiring run without picking up any electrical noise. I am not sure what the Aces system uses but the Holley systems were sensitive enough for EMI to be an issue that needed attention while installing the wiring. I twisted the pairs of wires as I was taught to reduce the noise being picked up.

Installing the Holley EFI system was easy and the wiring was installed separate from the car's main harness. I installed a Marine/Boat Circuit breaker to act as a fuse nearest the battery and then ran the power wires for the EFI system right to the circuit breaker itself. This way if there is any electrical noise coming through the harness it will get quieted by the battery acting as a buffer. The power wires need to be routed so they don't get anywhere near the spark plug wires or any other engine wiring. The sensor wires also need to be routed carefully to prevent them from picking up any noise. I have seen more noise issues on cars with metal bodies and hoods.

I am using my MSD 6AL box with my Holley EFI system. For the distributor needs to be "locked out" so the centrifugal/mechanical advance is disabled. I also removed the vacuum advance and the MSD Billet distributor works just fine.

I purchased my system from a Holley Distributor who provides 24 months of POST-SALE support as I was afraid I might have needed some help. They also sold me a Holley OEM Fuel tank module that has the fuel pump, pressure regulator and float level on one part which slides into the existing fuel tank. This supplies 58 psi continuously to my system and made the fuel system install a breeze.

The best advice I have received was to install and get the fuel injection parts working before connecting the timing controls up. This makes the installation easier if you keep them apart when installing it, otherwise there is confusion of which system did what causing errors.

 

I have one but it's not in the car yet...I'm installing a 406 with it and will be running the timing controlling with a tanks chambered tank and in tank pump. There is not as much knowlegde out there on these so lots of mixed reviews from a not of folks who did cheap poor installs or believe these are self tuning (they are not, just like the other brands) There are 2 Facebook groups for the aces stuff with tuners available.

 

I am currently installing Killshot on my '64 C2 replacing the old Holley Commander 950. I recommend any new install of any manufacturer that you hold off the timing control until you get the fuel only running and dialed in. The first problem I had was that the throttle body flange hung out over the intake mounting surface by about a 1/64". You can see the throttle body flange cutout in the third photo. I got a QJet to square bore adapter and that made the mounting surface big enough for the throttle body. The throttle body fuel fittings were locktited in. I wanted to have the fuel inlet an the same side as the original carb inlet. I got the fuel fittings out without heating and not stripping. I still had to use a 9/16-18 bottom tap to clean the locktite out of the threads. DON'T get any trash inside the throttle body! I took the loom off of the harness to route the wires to suite my chassis. I am going to mount the ECU on the right front inner fender where the original voltage regulator mounted. I switched the alternator and regulator to drivers side for AC install. The original air cleaner base hit the front outside corners of the throttle body. It took a one inch spacer to make it fit. The air cleaner top now just touches the underside of the hood. That is not a problem for me because i never latch my hood. JP

 

Thank you fellas for the responses! Looking like I’m probably gonna go with the glove box mount. Have any of you guys used the PDM - power distribution module they sell? I also got that on the whim I could use it to clean up a lot of the wiring plus it was all on sale lol.

 

The PDM just came out after I bought my unit last fall so it wasnt an option when I bought mine... The aces also dropped in price about $300 after I bought my killshot.

 

you building a 400 sb?

 

The self-tuning feature is alive and well on my Holley EFI system controller. The controller does modify the fuel tables and such while driving. Roadkill Garage had an episode where they watched it working, making changes on the fly. Like other systems the Holley does have you enter some basic information about your engine setup before making the default tables for operation.

I used the EFI Software to get the system set up for my engine before it had to finish it off in self learning mode. I have a dedicated laptop being used to monitor the EFI system and data log for me. This allows me to make changes on the fly if I need to. I received 24 months of some of the very best tech support after buying the system. The technician has a vast knowledge of EFI systems design and troubleshooting. Anything I could ask was answered right away by phone call or text to me within hours. With this kind of support, I felt confident that I would get the system working properly. Now I want to build a Multi Port EFI system using the Terminator or Dominator controller....

It is interesting the Aces has come out with their own Power Distribution Module, Holley has one as well now and it is supposed to be very helpful in cleaning up the wiring. It is more expensive than the Aces PDM and is now being sold as a good option for many building their first EFI system. Holley calls their unit a Sniper 2 EFI-PDM but they are now suggesting it for the Sniper original series as well as the second generation systems.

 

406 yes. Its already mostly assembled and sitting behind the car next to the 2004r over trans thats also going in the car this spring I bought a rebuilt roller cam long block and swapped my own pistons, cam and heads.

 

Thats not really self tuning though it just adjusts AFR based on basic fuel tables. Holley still recommends actual tuning for best performance as does all the systems I looked into. It sounds like you already did additional tuning beyond what it does itself.
For some the self made adjustments make it "good enough" for others not so much as theres backfiring on decel or other issues. Many folks who buy these things cant even use a laptop and expect to bolt this on and go. Truth is many wont be happy if they try that and thats why EFI has such mixed reviews. I saw both the roadkill, engine masters and roadworthy rescue installs of the sniper 2 as they have been promoted sponsors of all 3 shows. The sniper 2 has much better reviews than the original version.

 

I had a 406 built many years ago. Had a Richmond 5 speed behind it. it was a fun car! Where did you get the 200R4 from?

 

Nice car.
Sorry for the extremely late reply but I just seen this when researching the new aces killshot 2 and killshot fusion systems. (I will likely be using one of these vs the killshot I already purchased due to the fact that both of these newer systems work with drop base air cleaners like my cowl induction setup. both look almost the same but the new fusion which is only $600 has th ECM mounted on the throttlebody like the sniper which im not sure I want to mess with. the killshot 2 comes with a newer generation touchscreen which has a better windshield mounting system.

I got the 406 from a friend who pulled it from a 74 chevelle and had it rebuilt (I had to tear it down and build it with higher compression pistons, a bigger cam and different heads.) the 2004r came out of a monte SS before a friend rebuilt it at his shop for me. Life got in the way and its all still not in the car.