| FAQ |
| Members List |
| Social Groups |
| Calendar |
| Search |
| Today's Posts |
|
#1
05-25-2024, 01:01 PM
|
||||
|
||||
TH400 transmission help
Any transmission & CAM guys out there that can help with information? Will my 455 with this cam give me enough vacuum to properly work with my auto valve body TH400?
|
|
#2
05-25-2024, 02:46 PM
|
|||
|
|||
|
I would say yes.
I ran a larger cam than that and the T400 I built shifted fine in D. |
| The Following User Says Thank You to Dragncar For This Useful Post: | ||
|
#3
05-25-2024, 03:51 PM
|
||||
|
||||
|
What heads are you running?
The size of the chamber effects the level of idle vacuum you pull also. I would also hope that with a cam of those specs that your running at least 9.5 to 1.?
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
| The Following User Says Thank You to steve25 For This Useful Post: | ||
|
#4
05-26-2024, 08:17 AM
|
||||
|
||||
|
Thanks guys.
Yes, 9.5:1 Here are the head specs. |
|
#5
05-26-2024, 08:36 AM
|
|||
|
|||
|
The TH400 vacuum sensing / operated light throttle upshifts with the stock modulator are pretty care free but after your built and driving and want a different experience you can opt for the aftermarket adjustable unit to tune light throttle in town stop light to stop light shift points, because there is little shaft speed
Right foot down to the floor shift points are controlled by the governor by changing weights and springs, because there is little vacuum
__________________
If your not at the table you're on the menu A man who falls for everything stands for nothing. Last edited by Formulas; 05-26-2024 at 08:51 AM. |
| The Following User Says Thank You to Formulas For This Useful Post: | ||
|
#6
05-26-2024, 04:19 PM
|
||||
|
||||
|
Yes, it should be no problem at all!
__________________
Jim Moshier 1971 Grand Prix 462ci SD Performance 6x heads 1962 Catalina 389 1968 Firebird 400-455 I haven't decided "If we ever forget that we're one nation under GOD, then we will be a nation gone under." - Ronald Reagan |
| The Following User Says Thank You to Jim Moshier For This Useful Post: | ||
| Reply |
|
|
The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. Since then, it has become the mecca of Pontiac technical data and knowledge that no other place can surpass.
Linear Mode
