Can you guys point me in the right direction. To some guys that have done or are doing fule injection on there nails. I have read some stuff about converting the carb to TBI but Im looking for a top to bottom dos and donts of converting the engine. My thanks in advance.
First step is picking an EFI controller. Second step is getting the necessary sensors for the inputs. TBI's are good because they have the fuel pressure regulator and TPS built in. Keep in mind TBI's can be fuel flow (thus HP) limited. I have one on my 428 FE T-bird though. I have an aftermarket 670cfm 2bbl Holley TBI with 85lb/hr injectors. There are adapter plates sold to bolt them to a squarebore intake. To me it's relatively straight forward. Electrical: Install appropriate sensors (coolant temp, intake air temp, tach signal, TPS, O2). Relays for the fuel pump and ECU power. Then pick your method on the fuel return side. You can sump your existing gas tank and run a return line to it. You can run a surge canister with either a float bowl attached (like off a holley) so you just feed into it and no return line to the gas tank, or run a return line from the top of the surge canister back to the gas tank (simpler IMO, no moving parts). On my T-bird I use the stock mechanical fuel pump to pump into the surge canister and then use an Autozone universal TBI pump to the TBI unit. For the tach signal, probably your easiest install would be adding a pertronix unit to the distributor cap and running either off the negative side of the coil or directly off the pertronix unit. Points tend to be electrically noisy. Best method would probably be a pertronix unit straight to the ECU and the ECU feeding an ignition box, that'd give you timing controls, but it isn't necessary to control timing. I used the DIYautotune.com's relay board and MS1 ECU. I guess the DO's and DON'T's would be, make sure your TBI is capable of supporting the HP you plan on running. Make sure you do something on the fuel side to make sure it has a constant flow of fuel even when the tank is low. I can tell you first hand that before I installed the surge tank, when I was at a 1/4 tank of fuel or less the car would hesitate/stall on turns (looses pressure). That's all I can think off off the top of my head.
your gonna have to up the pressure coming out with a efi capable fuel pump tbi are simple set up. even mpfi arent hard if you do bank to bank set ups. crank sensors and all that is when it gets complicated. but price is a different story on all efis. look to about double to triple a carbs price.
On one of my 425's, I used a Holley Pro-Jection 4, set up as a tuned port. Dave Ray did the EFI- HEI conversion to work with the system, and it works well. I made a pair of spacer plates that go between the heads and intake manifold, as Dave outlined, with the EFI nozzles placed in the valley area of the spacers. That engine runs great, gets good fuel economy. Except for the spacer plates and the fabrication of the fuel rails, and the distributor conversion, it was relatively easy to do for me, a non-professional mechanic. Regards, Milton
for your fuel tank i bought a high output sending unit that i connect my -10an lines too. it has a return and a feed, so you do not have to worry about cutting up a stock tank. i pd i think$125.00. i think someone on the board makes them. i will have to go through some paperwork. have you looked at any of the fast tbi units? real easy to setup and have a self learn tuning process.. you just drive. you do have to weld in some wideband o2 sensors but that is easy,the tbi are not hard to setup just a bunch of small stuff. i got a lift at the house if your close to mass i would help you out for a six pack. paul 66lark gs turbo
