LT1 and a T56 in a 55 Chevy

Thanks, will do...

Maybe I'd better go back and reread the instructions for this FAST system,
maybe it doesn't need all those sensors ??

55HTelec004ss_Nov2018.JPG


I've also noticed there's a newer version of this system out now, mine is the older version....
Wonder what the difference is....

Here's a pic of the newer one...
244-301000.jpg
 
The thing is, I have a complete, running '93 LT1 motor I pulled out of a wrcked Z28 stashed away out in
my storage shed, but want to keep it all original, not steal any parts off of it. The new motor for the
'55 project needs all those parts for the EFI setup, so in a sense I'm starting from scratch. I could just go
steal all those parts off of the old motor, but that's not the original plan.
I guess I could go pull parts off and look at them, figure them out, and put them back on, as part of a
learning process. Finding the new parts for the new motor seems to be a bit of a problem though....
Like that MAP seal sleeve....
Willy
 
2Loose said:
Thanks, will do...

Maybe I'd better go back and reread the instructions for this FAST system,
maybe it doesn't need all those sensors ??

55HTelec004ss_Nov2018.JPG


I've also noticed there's a newer version of this system out now, mine is the older version....
Wonder what the difference is....

Here's a pic of the newer one...
244-301000.jpg
Click to expand...
The Newer Fast XFI i has self learning data files.
Short Term and Long Term Memory Cells.
Yours I remember.
It's a Good One still.
A friend from the past had exact same in his 1987 Buick Grand National GNX I used to work on.. last seen Shane around 2005.
Lost track of him..recession.

My 1987 Tuned Port Corvette does not use a Map sensor.
One of the few GM EFI cars that did not.
1985-1989 They used the Bosch Hot wire MAF sensor to Read airflow and determine LDV/8 parameters and calculate with a Logarithm.
 
There was a Buick Grand National that used to come down to our local track
and race, don't remember his times, but it was definitely quick !!
Haven't seen it around lately though....

I've been slowly finding the parts I need online, most of them from Rock Auto...
but still need a body (housing) for the IAC (Idle Air Control) on the bottom of the throttle body.
My cover plate I fabbed isn't going to do it...
Found this on the evilbay site, but they refuse to ship to Hawaii/Alaska...
55HTelec001_dec2018.jpg

They must think we're not a part of the USA yet....
 
2Loose said:
There was a Buick Grand National that used to come down to our local track
and race, don't remember his times, but it was definitely quick !!
Haven't seen it around lately though....

I've been slowly finding the parts I need online, most of them from Rock Auto...
but still need a body (housing) for the IAC (Idle Air Control) on the bottom of the throttle body.
My cover plate I fabbed isn't going to do it...
Found this on the evilbay site, but they refuse to ship to Hawaii/Alaska...
55HTelec001_dec2018.jpg

They must think we're not a part of the USA yet....
Click to expand...
Yes.
EBay has been a pain lately.
 
 
Finally located some O-rings for the MAP sensor probe that will fit snugly in the plenum hole,
four fit nicely on the probe, it should be ok....
55HTelec007s_Dec2018.JPG


Cut the water heater off of the IAC housing, and got a new probe to fit it,
and cut my cover plate to fit around the IAC housing....
55HTelec015s_Dec2018.JPG


And with a lot of shopping around, I think I finally have all the probes and sensors I need....
55HTelec008s_Dec2018.JPG


I'm learning a lot, I just hope I'm learning enough to not make any serious mistakes,
Merry Christmas everyone !!
-Willy-

More pix here (scroll down)....
 
great pictures , thanks for posting those pictures!
I'm glad your making progress!
 
Last edited:
Careful with that T56. The 93 M28 units dont just have different gear ratios...they have a lower torque capacity.

I pulled mine and put in an MN6 to replace it. Before it gets installed behind my planned 427 to replace my LT1, itll be headed to RPM for an overhaul.
 
dhirocz said:
Careful with that T56. The 93 M28 units dont just have different gear ratios...they have a lower torque capacity.

I pulled mine and put in an MN6 to replace it. Before it gets installed behind my planned 427 to replace my LT1, itll be headed to RPM for an overhaul.
Click to expand...

Yup, I agree, that M28 was rated at 350 ft-lbs with a 3.36 first gear, I don't plan to race it, or put sticky slicks on the rear, so hopefully I can keep it together. Back in the early sixties a buddy and I put together a blown small block and stuffed it in a '54 Austin Healy, with the original trans behind it, and managed to keep it all together for a couple of years. Never raced it, strictly a road machine. I lost track of him, but he swore he would never get rid of that car....
I also like the 0.80 fifth and the 0.62 sixth. Down the road when I have the money I'll probably look for an upgraded T56 to swap in, looked at one once at Silver Sport Trannies in TN rated at 600 ft-lbs. Maybe some day.
 
2Loose said:
Yup, I agree, that M28 was rated at 350 ft-lbs with a 3.36 first gear, I don't plan to race it, or put sticky slicks on the rear, so hopefully I can keep it together. Back in the early sixties a buddy and I put together a blown small block and stuffed it in a '54 Austin Healy, with the original trans behind it, and managed to keep it all together for a couple of years. Never raced it, strictly a road machine. I lost track of him, but he swore he would never get rid of that car....
I also like the 0.80 fifth and the 0.62 sixth. Down the road when I have the money I'll probably look for an upgraded T56 to swap in, looked at one once at Silver Sport Trannies in TN rated at 600 ft-lbs. Maybe some day.
Click to expand...
Anyplace a Dextron ATF is specified as the lubricant in a Manual Transmission with Overdrive or Truck 4x4 Transfer case that uses AFT You can substitute upgrade to Royal Purple Synchromax synthetic.
Special formulated for GM Overdrive manual transmissions and later New Process aluminum magnesium transfer cases.
Nothing better I have found.
Cuts down wear and increases torque capacity before failure.
 
The TKO600 5 speed I'm currently running in my '55 'gasser' behind my blown Olds 425 is lubed with Pennzoil Synchromesh. It seems to work great.
 
Living on a small island has it's disadvantages....
Searched every store that has bolts and screws, and could not
find the ss allen head metric screws I wanted, so drilled it to the next size
for the 3 screws for the IAC and tapped it for 10-32 ss allen heads
with ss lock washers....

55HTelec019s_Dec2018.JPG


And the same for the TPS, with ss flat and lock washers....
55HTelec020s_Dec2018.JPG


Both installed with anti-seize, as this is ss and aluminum, want that anti-seize in there....
 
I love seeing guys work through problems, where the exact parts don,t fit correctly,or perhaps,
work the way the guy owning the car wants it too, or he/she realizes it needs or require's tweaking ,
or a similar component is used with a fabricated adapter.
people that think things through,and seeing ingenuity,
and thought go into the process is almost always interesting to watch,
the key is generally thinking things through very carefully,
and measuring precisely before you jump into any project with both feet,
jumping head first off the dock with no idea how deep the water is is rarely a good idea,
every mod you make may result in the need for some other mod or fabricated part, so measure and test fit carefully
12cal.jpg

caliper.jpg
 
2Loose said:
so drilled it to the next size
for the 3 screws for the IAC and tapped it for 10-32 ss allen heads
Click to expand...
Did the new hole completely remove all the metric threads?

Luckily you had enough meat around each hole to go bigger.
 
It cleaned up quite nicely with the correct #21 drill bit for the 10-32 taps.

Decided to re-tap the threads in the plenum for the throttle body with 5/16"-18 NC,
and to use the ss allen head bolts I have....

All of my taps are sets of three, with different starting tapers,
the one on the right is a bottoming tap for blind holes....

55HTintake3s_Dec2018.JPG


I like to use a cutting fluid to prevent any galling when cutting new threads...

55HTintake4s_Dec2018.JPG


Taped off all holes where debris from the work could get in....

55HTintake5s_Dec2018.JPG


The metric threads that were in this plenum very closely matched the
new 5/16-18 threads I cut. I'm not happy about doing this, but there's
enough solid threads here that it will work out just fine....

55HTintake6s_Dec2018.JPG

I considered bumping it up to a 3/8" fine thread, redrilling and tapping,
but that much bolt seemed like serious over-kill, and the way I did it still
had enough solid threads in there that it will be just fine !!

All mounted up with never-seize and ready to go....

55HTintake7s_Dec2018.JPG


HAPPY NEW YEAR TO ALL !!
And maybe I can get this rig running this year !
 
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