We get a bunch of calls and emails every week about what is needed to make these swaps run and what works and does not work. Since there is already a ton of false info out on the internet about these swaps, I'll try to clear up the Myths and Factoids out there.
My answers are based on the over 1500 LTx Swapped vehicles we've supported since 2016. Below is original content. Nothing is a repeated myth from the internet or a magazine article. We've applied and tested each answer given below and in our FAQ videos so we know it works.
One Example is the 34 Ford on our home page. It was swapped with a L83/6L80E nearly 3 years ago and has logged nearly 30,000 miles on it since the swap was completed. Not only is it our customer's daily driver, it's been driven from Florida to California and Tennessee so the swap is proven. It went through the mountains, through 120 degree heat in the desert and has been in freezing temps without a hiccup. Note: This vehicle uses a Walbro 255 LPH fuel pump with a C6 Corvette Fuel Filter Regulator Combo just like an LS Swap. Don't be fooled into thinking the L83 needs 75 PSI. This one was dyno tuned by Jeremy Formato at Fasterproms and is running perfectly with just 58 PSI for 3 years (over 29,000 miles driven) without a hint of fuel starvation at this pressure.
This list is not all encompassing but as the questions come up I'll post them and the answers based on what we know works. - Ken
Gen 5 LT1 with T56 Manual (Modified from a C7 Corvette Donor)
WE ARE LIMITING THE NUMBER OF GEN 5 HARNESSES IN OUR WORKFLOW. PLEASE EMAIL US FOR AURTHORIZATION PRIOR TO SHIPPING ANY GEN 5 HARNESS FOR MODIFICATION.
Gen 5 LT1 Startup Video (at 15 seconds)
Gen 5 LT Swap Questions Answered (and Myths Busted)
After building over two thousand Gen 5 harnesses since 2016 we've learned the hard way what a few of the failure modes on the other end can be. If you want this to be a good experience for you and/or your crew please understand the following details:
Plain English Disclaimer: Over the years we've presented a ton of information here on this website, in videos, verbally over the phone, in printed instructions and supplements. We've done our best to test and verify each suggestion made and at the time any information is conveyed it is believed to be accurate. However GM makes calibration changes to each of their Electronic Modules internal software and hardware systems on an irregular basis. We will do our best to update and modify the information we convey here on this website in a timely manner once a new challenge is discovered. In the end, it's up to you the customer to check back here for updates to suggestions and installation techniques and make the appropriate modifications to your installation approach if needed.
PLEASE READ THESE BULLET POINTS CAREFULLY AND EMAIL US FOR PRIOR AUTHORIZATION BEFORE SHIPPING ANY GEN 5 HARNESS AS WE DO NOT SUPPORT ALL OF THE POSSIBLE GEN 5 CONFIGURATIONS:
LT1, L86, L83 and LV3 existing Donor Harness modification is available. Gen 5 LT Standalone Harness conversion pricing is $567.00 (L83, L86, LV3) or $645.00 (LT1 Camaro or Corvette) and includes a Delphi fuse/relay block with dust cover and fuse legend. The correct Pedal Connector and an OBD Port are always included. Your Donor Harness is Cleaned and Degreased and GM spec Tape is added where/as needed. We offer a Fan Relay Block (+$45) for powering 1 or 2 Fans. You will need to purchase a thermoswitch and adapter separately.
Typical turn around time is currently 2 weeks.
We've compiled questions received since we started building Gen 5 harnesses in 2016 and have set up the Q&A section below and over 40 videos on the Gen 5 FAQ tab above for answers to hundreds of the questions you may have.