Chevy Impala Forums - Reply to Topic
Impala 1st - 5th Gen Discussion 1958-1985. Discuss all Chevy Impala 1st Gen - 5th Generation Performance and Technical Discussion here.

Thread: 1977 impala th400 swap Reply to Thread
Title:
Message:
Trackback:
Send Trackbacks to (Separate multiple URLs with spaces) :
Post Icons
You may choose an icon for your message from the following list:
 

Register Now



In order to be able to post messages on the Chevy Impala Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










  Additional Options
Miscellaneous Options

  Topic Review (Newest First)
06-24-2019 09:19 AM
Stockcar10 got it in got it going and driving had the wrong converter in it the whole time
04-03-2018 07:43 AM
Stockcar10 [IMG][/IMG]
got the th350 out and the built 400 is ready to go in. fingers crossed it will be in tonight.
04-03-2018 07:39 AM
Stockcar10
Quote:
Originally Posted by Dwayne J View Post
There is a guy that makes tubular tranny crossmembers for the 94-96 cars that are a LOT easier to work with, not sure about compatibility or maybe you have the resources to fab something.

What headers did you use? I was looking at having band flanges added to truck manifolds since they are held in high regard up to about 1000rwhp, cast iron holds heat well.
I am sure there are a lot more options in the 6 years my car has sat.
yeah were just going to c notch the factory cross member and call it a day

and they are ebay turbo headers. if you run them you might have to do some fab depending on your setup. we had to cut down the right side about 2" so the flanges were even across the front of the engine.
03-26-2018 03:02 PM
Dwayne J There is a guy that makes tubular tranny crossmembers for the 94-96 cars that are a LOT easier to work with, not sure about compatibility or maybe you have the resources to fab something.

What headers did you use? I was looking at having band flanges added to truck manifolds since they are held in high regard up to about 1000rwhp, cast iron holds heat well.
I am sure there are a lot more options in the 6 years my car has sat.
03-26-2018 10:27 AM
Stockcar10 well didnt get the transmission installed this weekend like i wanted. decided to put it on my brothers lift so we could figure how we were going to modify the trans cross member. Still had a productive weekend on the car. decided to finally move the coils to the engine block(or so i hoped) or anywhere off the valve covers. Car has a tendency to eat plug wires even with wires being wrapped and the headers being wrapped.

heres some pictures. ended up using a new set of 12" factory plug wires and cut all the spark plug ends off and put on 90" ends with socks. the coil brackets are from ict billet and i fabricated the frame mounts out of some spare steel laying around my work ill redo the drive side to match the passenger side later on. i will say the coil pack jumper harness i got was just a hare to long. probably need to get a 15" jumper instead of a 24" but it will work for now

[/IMG]
[IMG][/IMG]
[IMG][/IMG]

[IMG][/IMG]
driver side mount

[IMG][/IMG]
this was before the wires were finshed as they arent wrapped nor do they have 90 degree ends on them
[IMG][/IMG]
passenger side mount

passenger side sits just above the starter and i made sure that theres no way they could ever contact the starter or its wires. also to take the coils out just have to remove 2 bolts and the hole assembly comes off the frame rails. I personally think they came out way nicer than i imagined!!
03-23-2018 09:29 AM
Stockcar10
Quote:
Originally Posted by Dwayne J View Post
Not easy to find but you realize a 94-94 cop car or Impala SS is a 30spline 8.5 with discs. The Impala axle is wider than the cop car axle, so the cop car axle might be better with slicks
yeah ive been lookin for ever for one but they all have been crushed in the wyo colorado neb region an the ones that arent they want 3000 plus to buy the whole car
03-22-2018 06:42 PM
Dwayne J Not easy to find but you realize a 94-94 cop car or Impala SS is a 30spline 8.5 with discs. The Impala axle is wider than the cop car axle, so the cop car axle might be better with slicks
03-22-2018 12:07 PM
Stockcar10 Moser BOP axles and factory C clip eliminator kits on order
03-22-2018 07:23 AM
Stockcar10
Quote:
Originally Posted by Dwayne J View Post
KDS Performance the guy who I tested prototype mounts for ended up opening this shop.
The 94-96 cars have an odd low mount AC compressor that makes the passenger side motor mount a but unique.

Right now I have little ambition to work on the Caprice, kids, bigger yard/house, career, getting fat and middle aged are all working against it. Car isn't worth anything so no motivation to sell it either, maybe work on it when the kids are a little older, local track starts some bracket racing at 13yo with parent in car and without at 16yo.
For now the family hotrod is electric, with 440tq from 0-43mph and 416hp from there to 73mph and will run 12.4 in the quarter stock, without all the noise and drama of a high stall and loud exhaust etc.

What are you doing for an axle? the low spline count stocker even if an 8.5" 10-bolt is going to be stressed, the later 30spline axle should handle it unless you are putting a brake in the TH400
ill have to check them out.
and i hear you i have another 77 impala coupe sitting in my yard with a cage in it. trying to get a title for it and want to do a back half kit on it.. but this one is gonna be the toy for now. my little girl should start racing 1/4 midgets this year so well see how far we get on her street car (this one).
im gonna run the 28 spline till it breaks. having moser make me some bop replacements so i can the factory c clip eliminators and then its off the the junk yard to get some s 10 blazer brake brackets calipers and rotors!

putting the trans in tonight after work hopefully
03-21-2018 02:23 PM
Dwayne J KDS Performance the guy who I tested prototype mounts for ended up opening this shop.
The 94-96 cars have an odd low mount AC compressor that makes the passenger side motor mount a but unique.

Right now I have little ambition to work on the Caprice, kids, bigger yard/house, career, getting fat and middle aged are all working against it. Car isn't worth anything so no motivation to sell it either, maybe work on it when the kids are a little older, local track starts some bracket racing at 13yo with parent in car and without at 16yo.
For now the family hotrod is electric, with 440tq from 0-43mph and 416hp from there to 73mph and will run 12.4 in the quarter stock, without all the noise and drama of a high stall and loud exhaust etc.

What are you doing for an axle? the low spline count stocker even if an 8.5" 10-bolt is going to be stressed, the later 30spline axle should handle it unless you are putting a brake in the TH400
03-21-2018 10:30 AM
Stockcar10
Quote:
Originally Posted by Dwayne J View Post

Mocked up the stock 2004 intake in my Caprice and while it was going to need some cowl hammering it looked like it could work with the custom built mounts I got from a GM powertrain engineer.
what did they have to do to make the mounts work?
03-21-2018 10:25 AM
Stockcar10
Quote:
Originally Posted by Dwayne J View Post
The 2007+ truck intake is actually very good and cheap. Called the Trailblazer SS intake in this article.
20 LS1 Intake Manifolds: Tested! - Hot Rod Network

Mocked up the stock 2004 intake in my Caprice and while it was going to need some cowl hammering it looked like it could work with the custom built mounts I got from a GM powertrain engineer.
thats actually the intake im ordering this week. and putting the holley mid ram up for sale

i want to be able to reuse my 92mm throttle body
03-20-2018 07:25 PM
Dwayne J The 2007+ truck intake is actually very good and cheap. Called the Trailblazer SS intake in this article.
20 LS1 Intake Manifolds: Tested! - Hot Rod Network

Mocked up the stock 2004 intake in my Caprice and while it was going to need some cowl hammering it looked like it could work with the custom built mounts I got from a GM powertrain engineer.
03-20-2018 07:10 AM
Stockcar10 trans guy called yesterday, going to go pick it up this afternoon in colorado
03-19-2018 07:34 PM
Stockcar10
Quote:
Originally Posted by Dwayne J View Post
At 700wheel then yeah a TH400 becomes a reasonable idea and you don't need the lower first gear something like a 4L60 would get you.
A properly built TH350 should handle the soft power delivery of a turbo though but finding someone to reliably build one locally is likely getting hard since that tranny has been out of OEM production probably 35years.

What mount kit did you use?

YEARS ago I dismantled my 96 Caprice with the intent of a turbo LQ4 swap, then "life" happened and it has sat since.
[IMG][/IMG]
This thread has more than 15 replies. Click here to review the whole thread.

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

 
For the best viewing experience please update your browser to Google Chrome