Tweet
I see that Corvette Central sells a board to replace the old inards of the TI amp. Has anyone used one of these? Just bolts right in and connects the same? Thanks for any help. I'm thinking I probably have a bad amp since everything else is new.
-
-
Re: Has anyone put in a new TI board?
George,
About six months ago, I replaced the Delco board in my T.I. amp with a new board from T.I. Specialty/Dave Fiedler. The car never ran so well in all the years I've had it. Wish I would have done it sooner. Very simple direct bolt in installation that takes just a few minutes. -
Re: Has anyone put in a new TI board?
On my way back to a stock car I replaced the MSD with the old Amp and a new Module from Lectric Limited. It is a solid state device in a potted square, not a stock pc board. Found the car ran better than it had in years, same as Michael found. The Module (not pc board) was probably the same item.Comment
-
Re: Has anyone put in a new TI board?
My 425 HP engine lights so fast with the new module that you almost don't hear the starter. I'm impressed.Comment
-
Re: Has anyone put in a new TI board?
Does this "new module" look like a plain vanilla four-pin HEI module?
Am I correct in assuming that it eliminates the main switching transistor that is mounted to the heat sink of original TI control units.
DukeComment
-
Re: Has anyone put in a new TI board?
I just had my '65 amp repaired by Fiedler. In my discussion with him, he mentioned that the newer solid state modules may have some hard start problems. Don't want to start any rumors; has anyone had problems with the solid state versions. Just to be clear, Fiedler sell replacement stock boards which are different than the solid state versions from many of the Corvette vendors.
Cheers,
RobMy Project Pictures
http://temp.corvetteforum.net/classics/l78vetteman/Comment
-
Re: Has anyone put in a new TI board?
Looks like an aluminum block Duke. Just about the exact same dim's as the old board. It has three terminals located in the same position as the old board and mounts in the housing exactly the same way.
If the main switching transistor is the round silver thing that sits in a well in the housing, yes, it's been eliminated. (round silver thing is high tech electronics talk) That was the exact same part that failed on my latest Delco unit. One of the three small wires popped off the terminal on the board. Second Delco amp in 23 years.Comment
-
The Old And The New *NM*
Comment
-
Re: Has anyone put in a new TI board?
Rob, The unit is made by M and H in CA., the same guys that make the breakerless SE unit, which also works like a dream. No hard start problems (less profit for Dave.)Comment
-
Re: Has anyone put in a new TI board?
I had Dave Fedler restore my TI box (new solid state on the inside) looked great but had starting problem, sometimes it would start sometimes it would not. After meny conversations with Dave he could not come up with a fix. Bought a N.O.S. box from Long Island have not had any problems.
BillBill Lacy
1967 427/435 National Top Flight Bloomington Gold
1998 Indy PacecarComment
-
Re: Hard Starting Problem
Those hard starting problems are due to that junk FI - replace with a carb. Sure somebody will trade even. OH its not the 60's - never mind.
Couldn't resist, sorry
AlanComment
-
Re: Has anyone put in a new TI board?
Circa 1970 the TI that I was running off the "12 mile L-88" quit, and it was a broken lead from the remote located (on the heat sink) main power transitor (otherwise knows as you say "round silver thing"). I stuck the lead back in the board via with a drop of solder, and it worked for another five years until corrosion caused a connector problem at the amp - fixed that, but took it off the car as I had by that time figured out how to make a single point work to 7000 revs. Circa 1987 I sold the system back to then owner of said L-88, David Burroughs, who reinstalled in on the car from whence it had come.
This replacement module is not a HEI module, but is probaby a similar hybrid circuit. Jack can probably describe the technology better - thick film, thin film, whatever - "black box" to most of us.
The HEI module has essentially the same circuitry as the TI amp, but with some added features including variable dwell. Both the TI and HEI have about the same average primary current and per spark ignition energy, but the TI coil generates a little more open circuit voltage, which doesn't mean much if the secondary system including the plugs and plug wires are in good condition as actual voltage required to break down the plug gap is typically in the range of 5-10 kV.
That's why "50,000 volt coils" are just marketing hype. What counts is primary ignition energy, which is usually measured in millijoules and the TI/HEI are about double the single point system.
DukeComment
-
Re: Has anyone put in a new TI board?
Wish I could say I understood all that. I have to be content using the items sold by people that do understand it. I know my 66 runs a lot better though. I still use the GM TI coil but, supposedly, a conventional coil can be used.Comment
-
Re: Has anyone put in a new TI board?
TI ignition was based on a 'pulse' waveform being induced by the magnet inside the distributor moving past a pickup sensor. That low voltage pulse was sent to the TI amplifier that essentially magnified the pulse and shaped it like a square wave to drive the coil's primary circuit.
Back in those days integrated circuits were just coming on-stream and most electronic assy's were fabricated from discrete components, especially those requiring a high voltage or high current profile. The replacement TI module performs the same function as the first generation printed circuit board and discrete components.
As another mentioned, it's a product of M&H Fabricators and Dave Fielder is considered a 'key' technical contributor at M&H...Comment
-
I talked to Dave today and ordered the board
Hopefully it will fix my problem! I'll let you guys know, but thanks everyone for the input.Comment
Comment