Loss of power in long high-g turns
07-04-2011, 02:04 PM
#21
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Location: Elkton, MD 21921
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Trying to think of anything I could have done to cause this..............
When installing the left rear coilover, I removed the small nuts which help hold the fuel line to the fender (visible when you open fuel hatch) as well as a fuel line-to-chassis bracket up inside the trunk. This was to allow some movement of the fuel line where the coilover comes through the trunk - to help with the coilover install. Procedure was not per the manual, but got it on S2KI. All fasteners replaced as they were before removal, but I did move that semi-flexible bellows section of the line around a good bit.
When installing the left rear coilover, I removed the small nuts which help hold the fuel line to the fender (visible when you open fuel hatch) as well as a fuel line-to-chassis bracket up inside the trunk. This was to allow some movement of the fuel line where the coilover comes through the trunk - to help with the coilover install. Procedure was not per the manual, but got it on S2KI. All fasteners replaced as they were before removal, but I did move that semi-flexible bellows section of the line around a good bit.
02-06-2012, 10:52 PM
#22
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Had another track day today. The problem is fuel related, and quite a pathetic one.
Topped-off 10 miles from the track. By end of first 30 min track session, started getting a bit of bogging ON LEFT HAND TURNS ONLY. Looked at RPM I was keeping when bogging started - usually 5k-5.5k. Took the next lap in the next higher gear, just to see if RPM related at all - rpms down to 4.5K on some of the problematic left handers.................. bogging still there.
Bogging gets more frequent through 2nd and 3rd sessions (still all left handers). By the end of the 3rd session, gauge SAID I have 1/2 tank. So, I tanked up for 4th session - no issue whatsoever. I was running just as hard as previously, and not a single issue.
So, basically, I get a single stinkin session, from full tank, before I start dealing with this problem.
I don't have a clue what to do here - it's not something I can work on then test out on the street - never happens on the street. Someone mentioned fuel filters, but should that be an issue with only 40K miles on the car?
Topped-off 10 miles from the track. By end of first 30 min track session, started getting a bit of bogging ON LEFT HAND TURNS ONLY. Looked at RPM I was keeping when bogging started - usually 5k-5.5k. Took the next lap in the next higher gear, just to see if RPM related at all - rpms down to 4.5K on some of the problematic left handers.................. bogging still there.
Bogging gets more frequent through 2nd and 3rd sessions (still all left handers). By the end of the 3rd session, gauge SAID I have 1/2 tank. So, I tanked up for 4th session - no issue whatsoever. I was running just as hard as previously, and not a single issue.
So, basically, I get a single stinkin session, from full tank, before I start dealing with this problem.
I don't have a clue what to do here - it's not something I can work on then test out on the street - never happens on the street. Someone mentioned fuel filters, but should that be an issue with only 40K miles on the car?
R
02-07-2012, 04:19 AM
#23
Registered User
Very common on track cars. Easy to fix. Run a surge tank that will keep fuel going to the fuel rail at all times. Here is one from Full Blown, but you can make your own for far less.
http://fullblownmotorsports.com/perf...own-surge-tank
http://fullblownmotorsports.com/perf...own-surge-tank
02-07-2012, 05:13 AM
#24
Former Moderator
So if oil pressure becomes low enough in those high G sweepers, you'll drop off the VTEC. That could explain your power flattening out.
Fuel starvation: power cuts out
Oil starvation: power decreases
Great info guys
02-07-2012, 05:12 PM
#25
Very common on track cars. Easy to fix. Run a surge tank that will keep fuel going to the fuel rail at all times. Here is one from Full Blown, but you can make your own for far less.
http://fullblownmotorsports.com/perf...own-surge-tank
http://fullblownmotorsports.com/perf...own-surge-tank
I have the Full Blown one and love it. Highly recommend.
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