Have anyone used post '88 GM stuff to do TBI conversion on 2F?

I read that guys use 1227747 comp pre '87 GM

I pulled 1228062 comp out of S15 truck
will that work for this conversion ?
where could i get the maps for that comp to work with 2F?
and do i really need a knock sensor?

Thanks

You'll want the 1227747 ECM. Look on Ebay. Most aftermarket
fuel injection uses this ECM.

The '747 computer has been hacked many times and there is really good info on the diy-efi site (http://diy-efi.org) on the changes(reporgramming) you will need to do to get it to work... Get a program like Winbin and a a burner and you can make you own chips for cheap. You can also get an EPROM emulator and tune in the car while driving(might need to stop to reload the bin, but you will not have to go home to reprogram the PROM.

good luck...
-Brett

Did any of you TBI guys ever sketch out the adapter sizing?

Haven't moved the milling machine yet, so was thinking of making up a few of those adapter plates for the cruiser folks. 1/2" (??)aluminum plate, with eight bolt holes (four match the cruiser manifold, other four match the GM Throttle body).

Texican -- did you ever find a source for those adapters?

For the folks who don't know me, I make up some stuff to sell... with 100% of the $$$ going to Cancer Research. Just my way of helping out both groups with a little time, material, and labor. Donated over $750 this past year to the ACS (American Cancer Society) & "Walk for a cure" (sponsored a fellow cruiser owner... on his fund raising) , so it is amazing how much little things add up!!! I figure I'll have one weekend in November to make things before having to pull the plug on the mill (new shop isn't even built yet, so need to put everything in storage). If I get a mechanical drawing for the adapter, might make it a cool $1000 in donations for the year. :p

Tom :usa:

Tom when I see you I'm buying you a :beer:

[QUOTE]Originally posted by roundrocktom


1/2" (??)aluminum plate, with eight bolt holes (four match the cruiser manifold, other four match the GM Throttle body).


The TBI only has three bolts holding it down
;)

thanks for info guys


Originally posted by roundrocktom
Did any of you TBI guys ever sketch out the adapter sizing?

Haven't moved the milling machine yet, so was thinking of making up a few of those adapter plates for the cruiser folks. 1/2" (??)aluminum plate, with eight bolt holes (four match the cruiser manifold, other four match the GM Throttle body).
Tom :usa:

http://fbufkin.home.mindspring.com/tbi.html
Is this something u were looking for?

Didnt spaceghost used to make them? His machinist moved, so maybe he'd set you up with the TBI adapter drawing?

Originally posted by TheMike
thanks for info guys

http://fbufkin.home.mindspring.com/tbi.html
Is this something u were looking for?

Close! Locations aren't given for the TBI.

Other thought is a TBI, manifold, and Carb (just need the base) to measure from and take it from there. That web sit shows why he has the two piece adapter... which to me means one more possible air leak.

Idea would be a plate to bolt the TBI onto. Then bolt onto the 2F intake manifold.

SpaceGhost... do you have a PIC of the machined adapter? one piece?

Tom :usa:

Tom I have a Holley 4 bbl. to TBI adapter here I could send you if it would help with R&D......I'm thinking it might could be made to work on a 2 F with some mods.
Butch

Tom,
You might want to email Spaceghost since he is in NM at supercrawl right now and may not see this post.

Ricko.

Originally posted by texican
Tom I have a Holley 4 bbl. to TBI adapter here I could send you if it would help with R&D......I'm thinking it might could be made to work on a 2 F with some mods.
Butch

Butch,

Could you post a picture of it?

More likely I need a TBI to measure up, and a 2F intake manifold. We should have plenty of 2F manifolds around, so just a matter of getting a TBI to play with.

Mainly, need to get the "old" house sold. At least I can sneak over there and use the milling machine while the house is on the market. Once I find a buyer, need to find a "storage place" for the machines.... and save enough $$$ to build the shop! :)

ZOG -- didn't think of that! Doh, He should be back in a week (?) and will hit him up about drawings then.

Tom :usa:

Tom,
The adapter was designed and cammed in Mastercam V8.
Mike could get an Iges file if you are considering making these.

What goodies do you have in your old shop and what are you using to drive them software wise?

I just loaded up the Latest Surfcam here and I am ready to machine a few small items with it.

$13K for it and full 5 axis capability!!!!!!;) :D

Originally posted by rugburn
Tom,
The adapter was designed and cammed in Mastercam V8.
Mike could get an Iges file if you are considering making these.

What goodies do you have in your old shop and what are you using to drive them software wise?



Nothing fancy at all... just an old Index Milling Machine with a DRO. Yep, need to hand crank my own cuts! :)

Lathe is a LeBlond. Overkill design, but something very satisfying to crank your own dials and just "feel" the work. Funny, really couldn't tell you the IPM feed rates, yet can feel and hear the metal when it is just right. :)

So just a mechanical drawing is all I need. If there are compound curves... uh, takes me a while. ;)

Long term plan is to convert the Milling Machine to CNC. Back into my area of electronics, so actually that is the fun part. CNC Pro and VectorCam for the software.... just didn't get the machine converted befor buying the new house (i.e. lots of time and projects to get done before I get back to working on it!). Worst part is that airstrip (3200' grass) across the street from me, boy is that getting the dreams working on building a home built plane!

Tom :usa:

Could go to a parts store and get the base gasket for the TBI. Should be able to get the basic dimensions from there.

I'm curious...all you guys with TBI...how do you pass smog? As idiotic as the boys at Jiffy Lube are (how do you not notice a 1/2" vacuum line capped 2" from the carb??), I think they'd notice there's no carb...

No smog check where I live, but there is not currently an underhood check in WA. Might be hard to tell them mine is an OEM V-8:shaking:

Following message popped up in my mail box:


http://www.tomquinn.com/lc/2f_fi/

Good write up on the TBI installation. Pretty good picture of the Downey Adapter. Catch with that adapter is it really needs to be cast, then machined. Too large to machine out of a solid block of metal (it is possible, but with hand operated machines, boy is that time consuming!).

Problem with "matching up to gaskets" is the holes are usually a little oversize on the gaskets, and it is hard to get a "center punch" dead on with a gasket. If I have a straight through hole, I'll clamp the TBI onto the metal plate. Strike the first hole with a transfer punch (diameter of punch matches the hole). Drill and tap that hole. Insert bolt. Repeat for second bolt. Ditto onto the third. Now with three perfectly lined up holes, I use "transfer screws" to mark the plates to be made. Time consuming, but so nice to have dead on bolt holes! This is part of the reason why it is good to have the TBI and manifold in front of me to make up an adapter.

Tom :usa:

Here are some pics (http://www.birfield.com/~morgan/tech/tbi_trial_fit/) of Mike's (Spaceghost's) adapter, trial-fitted to my 2F.

TBI 2F is one of my projects for this winter.

Morgan

does anybody happen to have some .bin files for the 7747 GM ECM to work with 2F engine?

i can get the 7747 and match the wiring harnes from 8062.
but softwarewise i have no idea what to change.
can anyone of u guys help me?

I have a spare TBI I would gladly send you for your project. Let me know where to send it. lcsixty@yahoo.com

I have the .bin that is running in my 84 TBI 2F... Just let me know if you need 'em. I'm running the 7747 computer, and have most things working (except for EGR). Runs like a champ!

A piece of software you're gonna want is WinALDL, it was a great help in figuring out what I needed to do programming-wise. Plus its just really cool to watch it work while you drive... :D

Here is a write up I did on my conversion. I have an autocad drawing of my adapter, but it is rather crude as I am not very good with autocad. If some one wants it, let me know and I will send you the .dwg. I will also try and put it on the web page.

http://home.attbi.com/~brandonsgarage/cruiser_TBI.html

Great stuff! THANKS.

The adapter from Space Ghost is a CNC machined part. Piece of art, but the catch is that nice taper is a PITA to do on a hand operated machine. Basically I cut a series of steps, then smooth out with a rotary file. Takes hours to look good.

I was hoping that it was a plain adaptor, with all straight sides. Still a possibility is to make up an adapter, and let folks do their own "porting work". PITA as it just means more work for lots of folks, but most of this group has an air compressor and rotary grinders. :)

OlympiaFJ60 -- A plain flip flop will do the divide by 2 function. What you might have not realized is that VSS signal will grow in amplitude (voltage) as it gets faster. So the signal starts off at less than a volt, but is up to 60V at high rpms. A comparator, with a resistor and couple of diodes to limit the voltage swing is used. That signal is then fed into a flip flop to produce the divide by 2. Also wondering if you can program the 2000 pulses/mile vs. 4000 pulse/mile via software.

Tom :usa:

The 2000 pulse per mile on the 7747 computer is a pulse to ground (according to customefis.com). I also bought the VSS from Jags that run. Since I am running a 327 +.030, I am using the 350 chip, and have had no problems. BUT, I have only about 200 miles on it after the TBI install so far.

Here's a thought about TBi adapters for a 2F. Anybody try to use a phenolic/thermo-plastic for the adapter? The phenolic/thermo-plastic is the same stuff used in building the plastic carb spacers and I figure it would be a lot easier to mess around with then trying to machine one out of aluminum (for those of us who do not have a mill). Just a thought!

I read that you can program the 4000ppm into the chip, but Tunercat doesn't have that parameter. I don't know my way around a bin enough to know what to look for. I know that some place on the diy-efi and gmecm site it is explained.

After trying several different flip flop methods, my limited knowledge, skills and tools yielded unreliable results. It was just easier to get the vss from Jags. I wanted to get the EGR working so I could finish tuning.