|
|
![]() |
#1 |
Banned
Join Date: Feb 2008
Posts: 852
Likes: 0
Liked 0 Times in 0 Posts
|
![]()
A little richer at peak torque if EFI give it a little pump shot
|
![]() |
![]() |
![]() |
#2 |
Veteran Member
Join Date: Mar 2005
Location: Sand Springs, OK
Posts: 8,132
Likes: 896
Liked 390 Times in 170 Posts
|
![]()
Mine used to do it when it was too rich "down there". It was simply pulling the engine down. Now only if it turns the tires. 1.3X 60's there's a hump, 1.2X 60's, no hump.
__________________
Ed Wright 4156 SS/JA Last edited by Ed Wright; 06-14-2012 at 02:05 PM. |
![]() |
![]() |
![]() |
#3 |
Junior Member
Join Date: Dec 2008
Posts: 27
Likes: 0
Liked 14 Times in 2 Posts
|
![]()
Don, I use to have the "hump" in my SS car and got rid of it by working on the Q-Jet. The basic problem is the Q-jet bowl. Its too small and makes the secondaries rich during high G's (launch). It takes a lot of detailed testing to solve this problem. Work on secondary rod shapes and hangers. If you don't have a Q-Jet disregard what I've said except for the "too rich" part.
Vic Santos |
![]() |
![]() |
![]() |
#4 |
Member
Join Date: Dec 2003
Location: Neosho, MO
Posts: 215
Likes: 0
Liked 59 Times in 13 Posts
|
![]()
Having ran a car in traditional Super Stock and now SS/BS (comp style), I have encountered the same exact thing that you are describing. According to everyone I talked to, it is almost like the motor takes a big drink of fuel right off the starting line. If you have AFR meters on the car, you can really see the "rich" issue. Some of it I believe was fuel pressure driven and some of it the jetting we were running.
A couple things that did help my current combo in SS/BS were moving the AFR sensors to the headers and not the collectors to get a better reading and increasing the timing on the starting line and pulling it back down track. Seems that the increased timing on the starting line helps burn the fuel a little better when on the tranny brake and within the first 60 feet. And I think Kyle might be onto something. My issue has almost gone away since changing to the Quickfuel carb and my new A-1 convertor. Maybe it is a combination of the changes I made over the winter but I still think carb and converter helped tremendously. |
![]() |
![]() |
![]() |
Thread Tools | |
Display Modes | |
|
|