Go Back   986 Forum - The Community for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Performance and Technical Chat

Post Reply
 
LinkBack Thread Tools Display Modes
Old 08-12-2019, 07:22 AM   #1
Registered User
 
The Radium King's Avatar
 
Join Date: Apr 2010
Location: Canada
Posts: 3,150
Quote:
Originally Posted by Robert986 View Post
1) I take it the 74mm throttle seems ok, or even the 76, but what about the 82mm? Would it be beneficial or is it just too big for the 3.2? I understand a 82 throttle from a Cayenne V8 would work and be cheaper than a GT3.
2) I take it that the 987 MAF-housing is too big for the ECU to adapt and a flash is needed, I do plan on a custom mapping by a good tuner however how bad is it with the 987 MAF-housing? Will the Engine run? Will I be able to drive to the tuner with the original tune? Or will I need to take the car on a trailer?
1) you'll have to decide if the larger tb is giving you a performance increase OR a pseudo-performance increase via what is for all intents and purposes remapped throttle performance. so, think of water; you put a 1/2" faucet on a 1" line and it will be a restriction and limit full flow (it will also increase the water pressure - good for cylinder fill in low-rpm situations). however if you put a 2" faucet on a 1" line then full flow will be achieved when the valve is only partially open - no extra power, but full throttle comes on sooner - pseudo-performance increase. i think the 74mm tb brings some top-end power by removing a restriction (to the detriment of low RPM torque) but the 82mm might be too big for any gains just losses.

2) talk w newart; iirc he ran with the larger maf housing prior to pushing the flash on his car and trims slowly increased until he got a cel. realize that more air is moving than the computer can allow for so you will get into a lean condition which is not good in the long term. fine for the drive to the tuner however.
The Radium King is online now   Reply With Quote
Old 08-12-2019, 10:59 AM   #2
Registered User
 
Join Date: Feb 2017
Location: Stockholm
Posts: 375
Garage
Thanks TRK, great answers.


Thinking of how to manipulate the sensor value to simulate the smaller MAF-housing.. On the other hand, if I can "limp" to the tuner, that will be good enough.
Robert986 is offline   Reply With Quote
Post Reply



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 On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -8. The time now is 04:44 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2025, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2025 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page