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10-25-2005, 12:15 AM
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#1 (permalink) |
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White Rice
Join Date: Jul 2005
Location: SJ
Posts: 112
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Skunk2 Stage 2 cams B18C issues
Installed my cams, valve springs/retainers and cam gears...couple of things I have noticed about them and I wanted to see if anyone else has this same issue...
Okay, I am used to having a higher idle with stage 2 cams...but these cams idle @ about 2000 rpm...if it was 1200 or even 1500 I wouldn't be thinkin about it but 2000 seems a bit high to me.... The car is also exhibiting an urge to stall at stoplights, etc which could be because its running a bit rich right now... Fuel/air ratio is always in the green (autometer F/A Gauge) except under full power shifts, even after it has warmed up. As for overall performance...WOW, the car screams from the new vtec engagement point of 6200 rpm all the way to 10k...they also make a fair amount of torque as I found out when launching @ 5500...tires just broke loose and I sat there for about a half second before skipping down the road. Over all, I like the cams, but the previously mentioned issues make me wonder if I F@cked something up, or if I just need to spend some dyno time with it. Thanks in advance... |
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10-25-2005, 08:40 AM
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#2 (permalink) |
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Mile marker 13
Join Date: May 2001
Location: NOR-CAL
Posts: 1,726
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yea thats too high... on my friends ls/vtec setup his was the same idling that high but i removed the warmup idle thing because it was just pulling the tb open just too much but i dont know what you have
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10-25-2005, 10:31 AM
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#4 (permalink) |
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White Rice
Join Date: Jul 2005
Location: SJ
Posts: 112
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I was wondering if it was the warm up idle plunger (I thin thats what its called) I checked it, then replaced it with one off an extra TB I had lying around, same results...
The motor is a usdm b18c with a mild port & polish, supertech valve springs & retainers, I already adjusted my valves and they are tight, throttle body gasket is good air temp sensor is good, no chk engine light. One thing happened this morning that had me almost shit a brick, I was on the freeway, and suddenly I started running WAAAY lean, lean enough to feel the motor shift, i pulled off and richened up my mixture with my VAFC, it ran fine after... Argh... |
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10-25-2005, 10:38 AM
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#5 (permalink) |
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Incompetent Robot Elder
Join Date: Aug 2001
Location: San Diego, CA
Posts: 3,201
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I'm thinking you might have gotten yourself a vacuum leak. I'd suggest starting with a quick visual of everything between the TB and head just to rule that out first.
__________________
Consensus is the failure of leadership. |
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10-25-2005, 11:38 AM
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#6 (permalink) |
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White Rice
Join Date: Jul 2005
Location: SJ
Posts: 112
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visually checked the entire intake side, TB bolts tight, intake man tight...wouldn't a vaccum leak cause the idle to fluctuate, not hold steady? When I first start the car the idle is steady @ 2k. If I go down the block a bit and hit a stop ligt, it will SOMETIMES drop, its not super consistent.
I know my air/fuel ratio is part of the prob, she drank 1/2 a tank of gas just to go to mountain view and back this morning. |
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10-25-2005, 01:38 PM
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#7 (permalink) | |
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60 - 170 mph
Join Date: Nov 2000
Location: fremont
Posts: 1,330
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Quote:
yes vaccum leak will cause the idle to fluctuate not hols teady. does it drop once the car is warmed up or just ranndomly? sounds like your running way rich... but i duno how it leaned just that one time...... don't run your car too rich like that as it will eat away your fuel filter, o2 sensor and your cat. you will have more problems like that. i wounder if its the safc problem. did u solder all the wires? Last edited by tbkonwso; 10-25-2005 at 01:40 PM. |
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10-25-2005, 02:13 PM
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#8 (permalink) |
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Incompetent Robot Elder
Join Date: Aug 2001
Location: San Diego, CA
Posts: 3,201
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It depends on how big the vacuum leak is. In theory, the IAC will try to compensate by lowering its duty cycle to get control of idle speed back, but if it's REALLY big (like brake booster big) even with the IAC completed closed, it will still idle high, and will do it all the time.
If you think about it, the only things that CAN cause a high idle are a stuck throttle or a vacuum leak. The only one of those two that would lead to bad gas mileage is a vacuum leak, because a stuck throttle wouldn't let unmetered air into the engine.
__________________
Consensus is the failure of leadership. |
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10-25-2005, 06:22 PM
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#9 (permalink) |
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White Rice
Join Date: Jul 2005
Location: SJ
Posts: 112
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I am hooking up with a buddy of mine who went through the honda program @ evergreen, I'll let you know what we find. I seriously appreciate ya'lls help.
I don't solder, but I had this guy that worked with me, an engineer, who was like, friggen macguyver with a solder iron soldier them.. Last edited by oldtimer; 10-25-2005 at 06:25 PM. |
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10-26-2005, 09:29 AM
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#10 (permalink) |
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White Rice
Join Date: Jul 2005
Location: SJ
Posts: 112
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well, we found out it was my ECU, I was using a ericks racinfg ecu that I had from my old eg and the fuel mapping was way off for my currently stock ignition. We plugged in a stock GSR ecu and things went alot better, idle dropped to 1300, and it hasn't exhibited the urge to stall at stoplights. We are going to spend some tuning time on the dyno today, I'll post my sheet if I can.
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10-27-2005, 01:55 PM
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#12 (permalink) |
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White Rice
Join Date: Jul 2005
Location: SJ
Posts: 112
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Well, she dyno'd at 171.20 at 7600 rpm. Max torque was 123.19 at 6200 rpm, baseline was 169.09 hp, 121.77 torque, VAFC can only go so far.
But, that is an 11 hp gain over my baseline prior to the install of the cams and intake manifold and torque is up by 13 over the prior base lin. Soon as the shop emails me the actual dyno sheet I'll post a link Next on the upgrade list is my ignition, I want to try my ericks ecu again with more spark.  Sittin here with the flu sucks.... 
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10-28-2005, 12:29 PM
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#15 (permalink) | |
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SRO Mentor
Join Date: Jan 2002
Location: Vancouver
Posts: 989
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Quote:
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10-28-2005, 10:15 PM
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#16 (permalink) |
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teh bunnie!
Join Date: Oct 2001
Location: baltimore
Posts: 1,006
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11 hp? how much money did you spend for 11 hp. my guess is over 500 dollars. 500 dollars could get you 75 hp with nitrous. maybe "only babys suck on bottles" but they get more then 11 hp for the same moneys.
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10-28-2005, 11:03 PM
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#17 (permalink) | |
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White Rice
Join Date: Jul 2005
Location: SJ
Posts: 112
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Quote:
OMFG...talk about not letting shit die...dude, I don't like nitrous, I don't care how many times you say "nitrous" I refuse to use it. If this was called "n20 b18c skunk 2 stage 2 cams" your response would be on topic.... 
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10-31-2005, 05:47 PM
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#18 (permalink) |
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White Rice
Join Date: Jul 2005
Location: SJ
Posts: 112
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1st run in august
http://img.photobucket.com/albums/v4...l/scan0001.jpg latest run http://img.photobucket.com/albums/v4...l/scan0002.jpg |
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