Modify O2 sensors - Page 3 - Fuelly Forums

Android Users - Coming Soon! - Migrating from aCar 4.8 to 5.0

Reply
 
Thread Tools Display Modes
 
Old 08-03-2006, 09:48 PM   #21
*shrug*
 
Join Date: Sep 2005
Posts: 6,195
Country: United States
Indeed. Something the VX and HX have are vtec-e, which promotes swirling, especially in the VX with its bowled pistons that were designed to inhance the swirling created by having only one intake valve open.
__________________

SVOboy is offline   Reply With Quote
Old 08-03-2006, 10:17 PM   #22
Registered Member
 
omgwtfbyobbq's Avatar
 
Join Date: Jul 2006
Posts: 1,516
Country: United States
Yup, reminds me of the long tuned intake runners, and heads ported for swirl in the old vw TDs. Now gasoline cars are using direction injection, and diesels are coming with ~16:1 compression ratios, I suppose they'll converge with HCCI multifuel engines.
__________________

__________________
Quote:
Originally Posted by FormulaTwo
I think if i could get that type of FE i would have no problem driving a dildo shaped car.
omgwtfbyobbq is offline   Reply With Quote
Old 08-03-2006, 10:18 PM   #23
*shrug*
 
Join Date: Sep 2005
Posts: 6,195
Country: United States
Woot for long tuned intake runners. I wish someone would tell me what's best on the exhaust side for FE, but I can't figure it out. I suck!
SVOboy is offline   Reply With Quote
Old 08-03-2006, 10:41 PM   #24
Registered Member
 
omgwtfbyobbq's Avatar
 
Join Date: Jul 2006
Posts: 1,516
Country: United States
I don't think exhaust tuning won't help much with FE because your limiting factor is pumping losses, which is related to rpm and gearing. Generally, manufacturers will tune an exhaust so that they can get a scavenging effect near peak hp, that way they can get the equivalent of a few extra psi of boost w/o a turbo. In order to do this you have to tune the exhaust based on each exhaust wave (acoustics, they travel at something like 800ft/s) so it will pull the exhaust gasses out of the piston near peak power, and allow even more air than normal to enter, and ultimately more fuel/power. I think this is why the drop off in torque/hp after peak isn't symmetrical compared to the increase...
__________________
Quote:
Originally Posted by FormulaTwo
I think if i could get that type of FE i would have no problem driving a dildo shaped car.
omgwtfbyobbq is offline   Reply With Quote
Old 08-04-2006, 02:57 AM   #25
Registered Member
 
krousdb's Avatar
 
Join Date: Feb 2006
Posts: 1,480
Country: United States
Location: Raleigh, NC
Quote:
Originally Posted by omgwtfbyobbq
Found something that says controlling swirl allows for stable combustion and better lean burn. Which makes sense, because hot spots in a cylinder could lead to pre-ignition, so controlling how the intake charge combusts (even combustion/heat distribution) is critical to being able to run lean without pre-ignition. Running an a/f ratio of 25:1 compared to 14.7:1 supposedly reduces fuel consumption by ~20% over the Japanese test cycle.
Can you point me to your source of info please?
__________________


krousdb is offline   Reply With Quote
Old 08-04-2006, 12:11 PM   #26
Registered Member
 
omgwtfbyobbq's Avatar
 
Join Date: Jul 2006
Posts: 1,516
Country: United States
Here ya go.
__________________

__________________
Quote:
Originally Posted by FormulaTwo
I think if i could get that type of FE i would have no problem driving a dildo shaped car.
omgwtfbyobbq is offline   Reply With Quote
Reply

Thread Tools
Display Modes

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 Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Odometer help/suggestion waterboysh Fuelly Web Support and Community News 10 12-14-2012 04:38 PM
100,000 fuel-ups! reppact Fuelly Web Support and Community News 9 12-04-2008 09:19 AM
Hello GasSavers_scostanz Introduce Yourself - New member Welcome 7 06-25-2006 08:37 PM
Conversion successful Matt Timion Fuelly Web Support and Community News 12 05-18-2006 03:24 PM
Electric panel heaters GasSavers_JustMe General Discussion (Off-Topic) 0 01-03-2006 04:43 PM

Powered by vBadvanced CMPS v3.2.3


All times are GMT -8. The time now is 09:10 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.