Pelican Parts
Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   Pelican Parts Forums > 1- Porsche Technical Forums > 911 Engine Rebuilding Forum


Reply
 
LinkBack Thread Tools Rate Thread
Author
Thread Post New Thread    Reply
Licensed User
 
Shuie's Avatar
 
Join Date: Feb 2003
Location: ....down Highway 61
Posts: 6,441
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
Old 05-21-2005, 08:11 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #1 (permalink)
Registered User
 
Join Date: Jul 2001
Location: Portland Oregon
Posts: 6,898
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
Old 05-21-2005, 08:23 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #2 (permalink)
Registered User
 
camgrinder's Avatar
 
Join Date: Feb 2004
Location: California
Posts: 921
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
Old 05-21-2005, 10:36 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #3 (permalink)
Licensed User
 
Shuie's Avatar
 
Join Date: Feb 2003
Location: ....down Highway 61
Posts: 6,441
Thanks guys. Great info as always
Old 05-22-2005, 07:03 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #4 (permalink)
Registered User
 
Join Date: Dec 2003
Location: Silver Spring, MD 20904
Posts: 429
How do you retain the motronics AFM w/ ITBs? Can it be chipped to do alpha-N or speed-density? Just curious...

SMD
Old 05-23-2005, 09:49 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #5 (permalink)
Reply

Thread Tools
Rate This Thread
Rate This Thread:

 


All times are GMT -8. The time now is 07:01 PM.


 
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page
 

DTO Garage Plus vBulletin Plugins by Drive Thru Online, Inc.