#1  
Old 12-20-2025, 05:34 AM
John Langer's Avatar
John Langer John Langer is offline
Ultimate Warrior
 
Join Date: Jul 2000
Location: phila pa usa
Posts: 3,350
Default

What does the converter fall back to on the gear change? Where did the motor make power on the dyno? Does the tire spin at all leaving at 4500 or is it consistent? If consistent lowering the staging rpm will slow down your reaction time and 60’. Raising it will allow the car to leave harder if the tire and track conditions will hold it.

The Following User Says Thank You to John Langer For This Useful Post:
  #2  
Old 12-20-2025, 12:31 PM
Gary H's Avatar
Gary H Gary H is offline
Ultimate Warrior
 
Join Date: Feb 2002
Location: Jacksonville
Posts: 1,487
Default

Quote:
Originally Posted by John Langer View Post
What does the converter fall back to on the gear change? Where did the motor make power on the dyno? Does the tire spin at all leaving at 4500 or is it consistent? If consistent lowering the staging rpm will slow down your reaction time and 60’. Raising it will allow the car to leave harder if the tire and track conditions will hold it.
Good question on the RPM fall back number. I'll have to pull some runs and check. The engine made 1038 HP at 7200 rpm on the 4th pull but the dyno water pump had a problem after that run, and I wasn't able to get another pull at a higher rpm. The HP numbers were still climbing on the 7200 rpm pull. We called it a day and I've never dyno'd it again. No on the tire spin. I hooks well with very little to no wheel spin. I'll get the RPM fall back number and repost

__________________
62' Lemans, Nostalgia Super Stock, 541 CI, IA2 block, billet 4.5" crank, Ross, Wide port Edelbrocks, Gustram intake, 2 4150 style BLP carbs, 2.10 Turbo 400, 9" w/4:30 gears, 8.76 @153, 3100lbs
  #3  
Old 12-23-2025, 07:29 PM
Gary H's Avatar
Gary H Gary H is offline
Ultimate Warrior
 
Join Date: Feb 2002
Location: Jacksonville
Posts: 1,487
Default

Quote:
Originally Posted by John Langer View Post
What does the converter fall back to on the gear change? Where did the motor make power on the dyno? Does the tire spin at all leaving at 4500 or is it consistent? If consistent lowering the staging rpm will slow down your reaction time and 60’. Raising it will allow the car to leave harder if the tire and track conditions will hold it.
I checked my data logger records and the RPM fallback after shifting is around 6800 RPM's

__________________
62' Lemans, Nostalgia Super Stock, 541 CI, IA2 block, billet 4.5" crank, Ross, Wide port Edelbrocks, Gustram intake, 2 4150 style BLP carbs, 2.10 Turbo 400, 9" w/4:30 gears, 8.76 @153, 3100lbs
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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

Forum Jump


All times are GMT -4. The time now is 06:33 PM.

 

About Us

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.

 




Copyright © 2017