|
|
|
|
| Author |
|
|
Licensed User
Join Date: Feb 2003
Location: ....down Highway 61
Posts: 6,506
|
ITBs w/Motronic ECU, cam choices for 3.2 Carrera rebuilds
Do ITBs gain anything over a stock Carrera intake if the Motronic ECU is retained?
Cam choice is what Im really curious about. I know I cant use anything hotter than a 20/21, 964, or 993 Supercup cam with the common plenum carerra intake due to fuel reversion issues. Can the Motronic ECU be chipped to use a hotter cam like a GE40, GE60, or GE80 if ITBs are used instead of the Carrera intake? Or would I need to go to full engine management if I wanted the hotter cam? TIA |
||
05-21-2005, 08:11 PM
|
|
|
Registered
Join Date: Jul 2001
Location: Portland Oregon
Posts: 7,007
|
Sherman:
You may use any cam you wish with ITB's & Motronic. The real issue here is that such combinations require custom mapping done on either an engine dyno or load-type chassis dyno and thats NOT cheap. Full engine management is easier for someone to build the maps needed to retain any semblance of durability.
__________________
Steve Weiner Rennsport Systems Portland Oregon (503) 244-0990 porsche@rennsportsystems.com www.rennsportsystems.com |
||
|
05-21-2005, 08:23 PM
|
|
|
Registered
Join Date: Feb 2004
Location: California
Posts: 926
|
The only other consideration is valve to piston clearances. The close lobe centers with some of these cams can cause a problem with V to P.
__________________
John Dougherty Dougherty Racing Cams |
||
|
05-21-2005, 10:36 PM
|
|
|
Licensed User
Join Date: Feb 2003
Location: ....down Highway 61
Posts: 6,506
|
Thanks guys. Great info as always
|
||
|
05-22-2005, 07:03 AM
|
|
|
Registered
Join Date: Dec 2003
Location: Silver Spring, MD 20904
Posts: 435
|
How do you retain the motronics AFM w/ ITBs? Can it be chipped to do alpha-N or speed-density? Just curious...
SMD |
||
|
05-23-2005, 09:49 AM
|
|
