Your donations help keep this valuable resource free and growing. Thank you.
|
1979 AMX Stocker update |
Post Reply | Page 123 5> |
Author | |
Class Guy
AMC Addicted Joined: Jul/02/2007 Location: Arkansas Status: Offline Points: 969 |
Post Options
Thanks(0)
Posted: Oct/13/2017 at 6:41am |
It's not pressure, it's an opportunity to learn. You'll do great with it.
|
|
Addicted to acceleration.
Owner and Admin for www.classracerinfo.com |
|
Pinballer
AMC Apprentice Joined: Feb/10/2016 Location: Central IL Status: Offline Points: 63 |
Post Options
Thanks(0)
|
Believe me, transmission school will definitely be in session here this coming winter. Lucky for me, my 80 year old step dad was an automotive instructor at a local college, and he's agreed to guide me through my first rebuild. After that, I'm being graded he says! Wow...the pressure on me never stops.
|
|
NHRA T/SA '79 AMX
|
|
Class Guy
AMC Addicted Joined: Jul/02/2007 Location: Arkansas Status: Offline Points: 969 |
Post Options
Thanks(0)
|
If you feel up to the challenge, Torqueflites are one of the simpler auto transmissions to work on. I rebuilt a 727 several years ago with an eBay (Turbo Action) rebuild kit and manual after fifty years of working on stick transmissions only. I took my time, asked questions and the result is a transmission that has 30K miles on it in a mildly hopped up 360 Hornet. There's a satisfaction in being able to work on your own stuff.
|
|
Addicted to acceleration.
Owner and Admin for www.classracerinfo.com |
|
Pinballer
AMC Apprentice Joined: Feb/10/2016 Location: Central IL Status: Offline Points: 63 |
Post Options
Thanks(0)
|
The latest:
As happens in racing, sometimes an unknown condition part you install just doesn't hold up as hoped. It would appear my "gift" rebuilt low-geared 998 transmission (long story but interesting) is done for. It lasted 7 runs. However, the only money I had invested in it was for 5 qts of fluid and the gas to get it home, so it's not like I have to lick my wounds on it much. I'd like to think my freshened up "Stocker-fied" Wicked Six 258 motor now has so much horsepower the tranny couldn't handle it any more, but I don't think I can get that lie past this crowd. I was testing a couple weeks ago locally and suddenly experienced a very lazy 2-3 shift on two successive runs. Loaded up and went home right then hoping it was needing an adjustment on the bands or internal pressure was low maybe. Nope. Dropping the trans pan reveals pieces of friction material clogging the filter, so I think my unknown transmission has now become a racing commodity commonly known to most of us in this arena as "junk." With so little time left in the racing season, and nothing else around my place readily available to install to get going again, I think it would be best to regroup for a while and get this low-geared trans re-done during the down time of winter, and probably do a spare one too for good measure. The rest of the car is acting pretty good right now, so the list of improvements needed over the winter isn't a real long one. Thought about building a motor test stand too, might come in handy. Oh, don't worry, we'll be back...not quitting. |
|
NHRA T/SA '79 AMX
|
|
Pinballer
AMC Apprentice Joined: Feb/10/2016 Location: Central IL Status: Offline Points: 63 |
Post Options
Thanks(0)
|
What I had around here to put in wasn't the ideal one, it's supposedly about a 2700 stall, but the car still has carb/fuel troubles I'm fooling with and I can't test that stall out very well. On the Desktop Dyno, things seem to ET best with about a 3200-3400 converter. That fancy race piece won't be happening until Santa Clause comes to visit or Powerball pays off! Just don't have that extra thousand to spend on a -GOOD- stocker converter right now, and when I do buy one, I want it to last.
Here's my latest update: Went to a test session after installing all the new pieces, and only got one run in before troubles set in. Had a dead miss after that run back in the pits and later found a pushrod had escaped it's rocker arm. Easy enough to fix... The good news was the car STILL ran almost one full second better on the 8th from what it had before. YAY! I had installed a fuel pressure gauge during the rebuild of everything and found out the line pressure even with the stock engine mounted pump I'm still using for now was way high, like 9 lbs at idle. New regulator on order. |
|
NHRA T/SA '79 AMX
|
|
idrambler
Supporter of TheAMCForum Joined: Jul/02/2007 Location: Nampa,Idaho Status: Offline Points: 2942 |
Post Options
Thanks(0)
|
Cool...that should work good....TC stall??
|
|
Jim....AMCRC
Treasure Valley AMC Club, Pres 69 AMX 401/727 74 GremlinX 401/727race only 73 Matador 2dr HT 360/727 |
|
Pinballer
AMC Apprentice Joined: Feb/10/2016 Location: Central IL Status: Offline Points: 63 |
Post Options
Thanks(0)
|
Chrysler 8 3/4 with 4.56's. 28.5 tall tire.
|
|
NHRA T/SA '79 AMX
|
|
matty 401
AMC Addicted Joined: Jul/06/2007 Location: Iowa Status: Offline Points: 1727 |
Post Options
Thanks(0)
|
i do not remember seeing what are you running for rear gears ?
|
|
72 matador 401 the beast
79 concord 2 door 72 matador 304 grasshopper 68 Rogue 406 93 Cherokee 4.0 5 speed |
|
idrambler
Supporter of TheAMCForum Joined: Jul/02/2007 Location: Nampa,Idaho Status: Offline Points: 2942 |
Post Options
Thanks(0)
|
Brain...
Great to see you are moving forward......looking forward to see the results of all the new parts.....
|
|
Jim....AMCRC
Treasure Valley AMC Club, Pres 69 AMX 401/727 74 GremlinX 401/727race only 73 Matador 2dr HT 360/727 |
|
Pinballer
AMC Apprentice Joined: Feb/10/2016 Location: Central IL Status: Offline Points: 63 |
Post Options
Thanks(1)
|
I'm getting behind on my news updates...finally got the car to a quarter mile track in July and with the factory 1980 258 auto drive train still in place, I eventually netted a 17.20 as my best time on a somewhat hot day. The index for my chosen class is 14.40 , so there's quite a bit of updating that needs done to get in the game for real. This ended the data gathering for the car in it's truly "stock" form, (other than gears), so we're marching on to the next stage now.
After that session, the whole drive train has been taken back out of it and it has now been fitted with the stocker grind cam, a correct and freshened head, the intake with the right numbers NHRA wants to see, some headers and collector, a low-geared fresh trans and a decent converter, and various other little race goodies like an electric water pump that hopefully will not only lower the ET's a bunch, but make life easier for me at the track. When I get it all assembled and tested, I'll be back with another report. It's probably a good thing I tore the car down when I did, the factory 904 trans had lots of sparkly stuff swimming around in it when I drained it, so I guess I got about all I could out of the original piece with it's 110,000 + miles on it. A rebuilt 998 trans is going back in. |
|
NHRA T/SA '79 AMX
|
|
Post Reply | Page 123 5> |
Tweet
|
Forum Jump | Forum Permissions You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |