new Tripower install
First of all Thank You for this forum, been reading about self learning EFI for years installed a TBI from a 92 C10 SBC on my 79 J10 AMC 360 20 years ago and other than for lack of power sure ran good compared to the carb.
Current victim is a 1958 Nomad with 409 W engine factory 3-2's probillet MSD, purchased the Fitech Tripower for it and have just installed Fitech 40019 in tank fuel pump keeping returnless setup.
To installed the Fitech 2 barrel TBI units on the stock manifold going to have to use adaptor plate (Rochester 2C to Holley base) not real crazy about doing it this way but no one makes a 3-2 manifold other than OEM,.
Secondly curious about how to set up the MSD #8393 dizzy, it has an ignition module, no vacuum advance, centrical advance,think I can replace the module with 2 wire pick up and lock the advance.
Any constructive advise would be appreciated
You are on the right path for the ignition side. As for the returnless fuel system, I do not recommend on a throttle body unit. Fuel heat becomes a problem when not in a full loop. Port injection systems get away with this because the fuel rails are separate from most all other components.
Really really hate to pull the fuel tank back out , it was a hassle, dead headed with fuel pressure guage yesterday and got 60 lbs psi at the engine compartment, little confused about PWM , can I supply power to pump either way i.e. constant 12 volts or PWM ?.
Concerning ignition,after reading about all the problems with setting up timing wondering if it would be better to start out with no timing control control and let the unit self learn, getting a feel for how the Fitech/409 play play together, then start messing around with details?
Sonoraed, I am no expert but the PWM stands for pulse width modulation. From what I understand it will lower the voltage on the fuel pump as it needed. Then it will increase as you press on the gas. So if you are cruising on the highway you wont need the pump running at full load so it will lower the voltage to reduce wear on the pump. But when you stomp on the gas the it will increase the voltage to give a full load. This will only work on fuel pumps that allow for the PWM. Some pumps will not work with it as they require full 12 volts all the time. But it will be best if you have the return on the fuel line back to the tank. Then you will not build excessive amounts of build up on the pump that will increase the life of your pump also.
As far as the ignition problems I cannot tell you a lot about that topic but from my own experience. I started out with the hei distributor so I had no timing control from the fitech but I have since changed it to the 2 wire probillet distributor and it is much easier to work with once you get it dialed in. Now everything is controlled thru the hand held much easier to tune and know what is going on in the engine thru my handheld. Granted we don't have the same cars as mine is a 34 ford delivery sedan with a 383 stroker, so I don't have a lot of gauges and ways to monitor the engine as the newer cars do.
This is just my experience with what I have and maybe this will shed some light on what you may want to do.
Either ignition system the car runs and if you can get it running like you want either way will work. But as far as the fuel lines I would definitely run a return line and a pump that runs off of pwm.
Sonoraed, can you tell me what the bolt spacing is on the base of the tri-power throttle bodies? I have a vintage Offenhouser manifold for a small block Chevy that was my dads from back in the late 50s-early 60s that some day I would like to put on something and all Fitech seems to say about it is " will bolt onto most 6-pack manifolds" Which isn't really all that helpful. It would be very helpful to know the bolt spacing to see if I would have to also buy adapters.
The Tri Power TBI's were really made to fit a Mopar 340/360 6 Pac set up, the Base plate bolt pattern is Holley 2 bbl, I used three Mr Gasket MRG1947 adapters to go from Rochester 2C's to TBI, not crazy about using adapters hopefully they work. also air cleaner base plates will have to Mopar style.
Fitech support is a joke! phone lines are always busy, email's response is two days and instruction sheets are vague. I'm still trying to figure out which unit is #1 and #3, MAP sensor hits the manifold no reply to my email about that yet, what exactly is "phasing the distributor", is the throttle linkage set up to open all throttle shafts at once or are they synchronized to open progressively, do I have to use a MSD CA6 with the two wire pick up or does the Fitech module have a built in ign module?
What really bothers me is all the problems many seem to be having, good luck with your Offey manifold!
Quote from sonoraed on August 3, 2019, 4:34 pmThe Tri Power TBI's were really made to fit a Mopar 340/360 6 Pac set up, the Base plate bolt pattern is Holley 2 bbl, I used three Mr Gasket MRG1947 adapters to go from Rochester 2C's to TBI, not crazy about using adapters hopefully they work. also air cleaner base plates will have to Mopar style.
Fitech support is a joke! phone lines are always busy, email's response is two days and instruction sheets are vague. I'm still trying to figure out which unit is #1 and #3, MAP sensor hits the manifold no reply to my email about that yet, what exactly is "phasing the distributor", is the throttle linkage set up to open all throttle shafts at once or are they synchronized to open progressively, do I have to use a MSD CA6 with the two wire pick up or does the Fitech module have a built in ign module?
What really bothers me is all the problems many seem to be having, good luck with your Offey manifold!
I hear you about customer support. I'm hard of hearing so have trouble trying to use the phone to get help but have had trouble with them not bothering to read my emails and giving seemingly random answers that don't even come close to answering my questions then refusing to communicate by email and insisting I call them if I want answers.
Thank you for answering my question about bolt spacing. I hope someone here can answer your questions and help you get up and running.
MAP problem solved by remotely mounting to firewall using Vapor-Worx kit, impressed with owner of Vapor Worx (Carl) high caliber tech articles concerning fuel related issues and he actually spent time talking to me.
Concerning fuel pump ended up removing Fitech in tank fuel pump and installing GM oem style Walbro module made for a 2001 GM Tahoe 5.3 and LS corvette style fuel filter/regulator/fuel return, this vehicles fuel pressure is 58 lbs, used GM style plastic lines (from tank to filter and back), dead headed (with battery voltage) to test for leaks 60 lbs at engine, I know fuel system can be done many ways but the simplicity of GM system really appeals to me.
Right now dealing with wiring , which has been a challenge to install cleanly and trying to understand what the creator of the instruction is trying to tell me, I install Hot Rod AC for a living and am used to aftermarket kit instructions being vague but Fitech really needs help in this area.
Quote from sonoraed on November 1, 2019, 8:48 amMAP problem solved by remotely mounting to firewall using Vapor-Worx kit, impressed with owner of Vapor Worx (Carl) high caliber tech articles concerning fuel related issues and he actually spent time talking to me.
Concerning fuel pump ended up removing Fitech in tank fuel pump and installing GM oem style Walbro module made for a 2001 GM Tahoe 5.3 and LS corvette style fuel filter/regulator/fuel return, this vehicles fuel pressure is 58 lbs, used GM style plastic lines (from tank to filter and back), dead headed (with battery voltage) to test for leaks 60 lbs at engine, I know fuel system can be done many ways but the simplicity of GM system really appeals to me.
Right now dealing with wiring , which has been a challenge to install cleanly and trying to understand what the creator of the instruction is trying to tell me, I install Hot Rod AC for a living and am used to aftermarket kit instructions being vague but Fitech really needs help in this area.
Fitech instructions have been lacking. Definately an issue. Fortunately they are making strides to clearing up the literature and making the harnesses more universal across all their products. Specifically wire colors. This does not help those of us already using the systems, but feels good to know they are listening and making changes. 2019 was a rough year for Fitech. Great things to come for 2020. #fitechfest2020
Stopped by the Fitech booth at Sema Tuesday and talked to gentleman who knew you well (forgot his name) he said they were a small over whelmed company and trying to solve the problems we have alluded to, told him the tech team would not be so busy if products instructions were easier for the layman to understand.
I also feel Fitech would be wise to tell customers in advance that a speed density fuel injection system may not work well with low manifold vacuum radical cam engines, he said there good to 4" on vacuum, I'm no expert.