For the test runs, we used 87-octane pump gas, the fuel, timing, and transmission maps that were preinstalled on the Keisler A41 transmission, and the MSD MEFI4 engine controller.
In the May '08 issue, we dropped a GM LS1 into a '64 El Camino and left you hanging because we didn't have the parts to finish the job. Since that time, we've received exhaust, a radiator, and all the little parts and pieces to get the car on the road. In March, we drove the Elco to Ramona, California, near San Diego on the Car Craft Anti Tour, getting nearly 20 mpg on the way with zero overheating and zero drama. In fact, the car is so reliable, it might be bordering on boring. It's a good problem to have.
The Keisler A41 is similar to a 4L60E GM overdrive. Since we were using the stock LS1, we used the Stage 1 model with a 1,600-2,000-rpm lockup converter that is rated for no more than 450 lb-ft. The A41 is 30 percent overdriven, putting us at about 2,000 rpm at 70 mph.
The following details cover the rest of the installation and the scary computer stuff that really wasn't scary at all. We ended up using the base maps provided by the manufacturers and included some info on how to tweak them if you want to bark the tires and waste some fuel. It reminded us just how easy it is to build a Chevy.
There are only two connectors that will be plugged into the transmission: the 2-pin vehicle speed sensor (VSS) on the tailshaft and the 13-pin connector on the main body. Both connect to the transmission control unit (TCU) we mounted under the dash. We also connected the 12-volt key-on ignition source, the ground wire, and the brake switch connector to tell the converter to unlock when the brakes are applied. That's all there is to it.
There should be a Mexican restaurant called The El Camino, if there isn't one already we're just sayin'.
PARTS LIST DESCRIPTION PN PRICE Aeromotive Q/C to -8 adapter 15118 $36.95 Aeromotive -8 male adapter 15607 12.75 Afco LS1 radiator 80252NLSZ 634.95 Auto Meter vintage tach 2897 159.95 B&{{{M}}} transmission cooler 70297 219.95 Flowmaster exhaust kit 17120 472.99 Fram oil filter PH3505 6.23 K&N air filter RP-4970 106.95 Lokar oil dipstick 5008 49.95 Lokar LS1 throttle cable 1000LS1 68.69 Lokar throttle pedal 6129 129.95 Lokar brake pedal pad 6135 53.39 Milodon low-profile {{{LS}}} pan 30915 389.95 MSD LS starter 5096 {{{240}}}.00 S&P headers N/A 577.95 Stant radiator cap 10329 5.38 {{{Summit}}} fuel filter 230118 79.95