Hypertech Chips
Old(s) Fart
Joined: Mar 2007
Posts: 50,803
From: Northern VA
The CCC system on the 307 has a VERY limited range of adjustability. All it controls that affects engine performance is the primary side mixture ratio and the advance curve. Any aftermarket chip can only play with these two variables and if it's C.A.R.B. certified, it can't make much difference in either from stock settings.
I'm sure that if you spend $200 or $300 on a chip, the "butt dyno" will tell you that there's been a significant increase in performance. Quarter mile times would argue otherwise, however.
The secondary side of the carb is purely mechanical and responds to metering rod changes and adjustment of the secondary air door warp spring, just like on any Q-jet. Also note that on the 307 carb, the secondary air doors are limited to only about 70 degrees of opening. You can file the tab to get them open the full 90 degrees, though it isn't clear that an otherwise stock 307 can use the extra airflow.
I'm sure that if you spend $200 or $300 on a chip, the "butt dyno" will tell you that there's been a significant increase in performance. Quarter mile times would argue otherwise, however.
The secondary side of the carb is purely mechanical and responds to metering rod changes and adjustment of the secondary air door warp spring, just like on any Q-jet. Also note that on the 307 carb, the secondary air doors are limited to only about 70 degrees of opening. You can file the tab to get them open the full 90 degrees, though it isn't clear that an otherwise stock 307 can use the extra airflow.
Thread Starter
Registered User
Joined: Apr 2013
Posts: 515
From: Wilmington, DE
The CCC system on the 307 has a VERY limited range of adjustability. All it controls that affects engine performance is the primary side mixture ratio and the advance curve. Any aftermarket chip can only play with these two variables and if it's C.A.R.B. certified, it can't make much difference in either from stock settings.
I'm sure that if you spend $200 or $300 on a chip, the "butt dyno" will tell you that there's been a significant increase in performance. Quarter mile times would argue otherwise, however.
The secondary side of the carb is purely mechanical and responds to metering rod changes and adjustment of the secondary air door warp spring, just like on any Q-jet. Also note that on the 307 carb, the secondary air doors are limited to only about 70 degrees of opening. You can file the tab to get them open the full 90 degrees, though it isn't clear that an otherwise stock 307 can use the extra airflow.
I'm sure that if you spend $200 or $300 on a chip, the "butt dyno" will tell you that there's been a significant increase in performance. Quarter mile times would argue otherwise, however.
The secondary side of the carb is purely mechanical and responds to metering rod changes and adjustment of the secondary air door warp spring, just like on any Q-jet. Also note that on the 307 carb, the secondary air doors are limited to only about 70 degrees of opening. You can file the tab to get them open the full 90 degrees, though it isn't clear that an otherwise stock 307 can use the extra airflow.
Old(s) Fart
Joined: Mar 2007
Posts: 50,803
From: Northern VA
Actually, it's Computer Command Control.
This link has some good information:
Understanding The ECM & System
This link has some good information:
Understanding The ECM & System
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