Power Loss Under Cornering - S2KI Honda S2000 Forums

Notices
S2000 Racing and Competition The S2000 on the track and Solo circuit. Some of the fastest S2000 drivers in the world call this forum home.
Sponsored by:
Sponsored by:

Power Loss Under Cornering

 
Old 12-28-2018, 05:54 PM
  #1  
Thread Starter
 
samsam5886's Avatar
 
Join Date: Feb 2008
Location: Alhambra
Posts: 732
Thanked 0 Times in 0 Posts
Default Power Loss Under Cornering

The power loss happens 11:00 minutes into the video and several times again through Riverside at 12:50


My first guess was fuel starvation after it happened in the previous session with less than 1/4 tank, but it continued happening after filling to 1/2 tank. It was perfectly fine in the beginning of the day. Or it could be oil related.

Does anyone know what might be causing it or has anyone managed to fix a similar issue?
samsam5886 is offline  
Old 12-29-2018, 05:16 AM
  #2  
 
Join Date: Sep 2012
Posts: 374
Thanks: 0
Thanked 2 Times in 2 Posts
Default

my only thought is maybe something wrong with the pump or maybe a loose wire/connector or relay. can you data log?
summitrider2012 is offline  
Old 12-29-2018, 06:24 AM
  #3  
Registered User
 
stooga's Avatar
 
Join Date: Aug 2017
Posts: 63
Thanked 3 Times in 3 Posts
Default

I've gotten fuel starvation at close to 1/2 tank. It's worth seeing if it still occurs at a full tank
stooga is offline  
Old 12-29-2018, 12:18 PM
  #4  
 
RAIN H8R's Avatar
 
Join Date: Dec 2007
Location: Waukesha, WI
Posts: 4,580
Thanked 34 Times in 30 Posts
Default

Do you have a baffled oil pan? Do you have the valve cover mod done?
RAIN H8R is online now  
Old 12-29-2018, 01:20 PM
  #5  
Thread Starter
 
samsam5886's Avatar
 
Join Date: Feb 2008
Location: Alhambra
Posts: 732
Thanked 0 Times in 0 Posts
Default

Originally Posted by summitrider2012 View Post
my only thought is maybe something wrong with the pump or maybe a loose wire/connector or relay. can you data log?
Hm yea it could be. Could driving with less than 1/4 tank in the previous session have done some sort of damage related to the fuel pump? Unfortunately I can't data log. Wiring is a good possibility too, but it feels more fluid related though since there are some other high G turns where nothing happens.

Originally Posted by stooga View Post
I've gotten fuel starvation at close to 1/2 tank. It's worth seeing if it still occurs at a full tank
Yea that was right below 1/2 tank. I will try again with a full tank next time I should have tried it with full tank on that same day >_<

Originally Posted by RAIN H8R View Post
Do you have a baffled oil pan? Do you have the valve cover mod done?
No baffled oil pan (but planned! lol) but it has never been an issue for the past 14 track days. I've heard our cars lose VTEC when oil pressure reaches below a certain point, is that right? What is the valve cover mod? Is it related to blow-by? It definitely could be oil related too because I was 0.8 quart low from the H mark on my dipstick when I got home.

Thanks everyone!
samsam5886 is offline  
Old 12-29-2018, 06:40 PM
  #6  
 
Join Date: Aug 2010
Posts: 2,940
Thanked 43 Times in 35 Posts
Default

What session number? I definitely need to keep it above half tank to make sure I don't get fuel cut. The s2000 gauge is very inaccurate for track use. If your tank said half, it most likely was less than half. I'm finding that I'm adding +8 gallons at the half way mark when read during track use (it's a 13.2gal tank).

If I get low traffic and a clean full 25 min session for 1 and 2, I definitely need to fill up before the 3rd session.
Bullwings is online now  
Old 12-29-2018, 08:59 PM
  #7  
 
Join Date: Aug 2010
Location: Phoenix, AZ
Posts: 3,062
Thanked 9 Times in 9 Posts
Default

I just picked up my new oil pan that I had a baffle welded into. I plan to install it in the next month or two. What is the valve cover modification? I'm also planning a dual catch can install.
AZS2KDancer is offline  
Old 12-29-2018, 09:46 PM
  #8  
Registered User
 
HawkeyeGeoff's Avatar
 
Join Date: Mar 2017
Location: Waterford, MI - America's High Five
Posts: 454
Thanked 36 Times in 33 Posts
Default

HawkeyeGeoff is offline  
The Following User Says Thank You to HawkeyeGeoff For This Useful Post:
samsam5886 (01-03-2019)
Old 12-30-2018, 03:09 AM
  #9  
Thread Starter
 
samsam5886's Avatar
 
Join Date: Feb 2008
Location: Alhambra
Posts: 732
Thanked 0 Times in 0 Posts
Default

Wow very neat VC mod! Thanks Hawkeye

Bullwings, the power loss happened in session 3 and it read 1/4 tank on track and empty with gas light on by the time I got to the paddock lol so yea it does read much higher on track with it sloshing around.
samsam5886 is offline  
Old 01-02-2019, 01:57 PM
  #10  
 
Join Date: Jan 2009
Location: Milwaukee, WI
Posts: 477
Thanked 4 Times in 2 Posts
Default

I think this is fuel starve, you have the classic left hander shortly before it happens. On my car I fuel starve after left handers after I'm only 5 gallons from full.

There's a 'damper' on the factory fuel gauge that prevents it from responding quickly to fuel slosh, when tracking this means the gauge won't go down as quickly as you're actually using fuel. See below for my undamped data log of actual fuel level for a lap. Drops from 100% to below 70% just from slosh.

the-moss is offline  
The Following 3 Users Say Thank You to the-moss For This Useful Post:
HawkeyeGeoff (01-03-2019), samsam5886 (01-03-2019), Zer0ne (01-02-2019)

Quick Reply: Power Loss Under Cornering


Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands