08-25-2014, 07:02 PM | #57 |
Booooosted.
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What are the chances that the factory stall is being overpowered by the cam?
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08-25-2014, 07:04 PM | #58 |
Drives: 2SS/RS L99 BLACK Join Date: Apr 2010
Location: Franklin , MA
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08-25-2014, 11:24 PM | #59 |
SHKE BKE
Drives: 2013 Camaro Join Date: May 2014
Location: SoCal
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I think the bigger cam is definitely going to be causing the vacuum problem just because the car has been supercharged.
Get a vacuum pump or power steering assisted brakes instead of vacuum assisted... if there is a kit. I completely forgot your car is SC |
08-25-2014, 11:40 PM | #60 |
Drives: the 2nd amendment home Join Date: May 2008
Location: OK
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How many separate vac lines come off the S/C? Have you plugged them then checked vac?
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08-26-2014, 05:01 AM | #61 | |
Drives: 2SS/RS L99 BLACK Join Date: Apr 2010
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08-26-2014, 08:47 AM | #62 |
Geek
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So what makes the idle/coastdown behave differently in the auto cars? I imagine it's because you don't separate the driveline completely when coming to a stop. I haven't hooked up to an automatic car yet. It's on my todo list.
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08-26-2014, 09:00 AM | #63 | |
Drives: 2SS/RS L99 BLACK Join Date: Apr 2010
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08-26-2014, 09:08 AM | #64 |
Geek
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It should use the coastdown table if you're moving with your foot off the gas. I could see how you would need a bunch more timing to keep it happy. Mine would bog if I didn't have a clutch to feather.
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08-26-2014, 09:19 AM | #65 |
Drives: Love the one you're with Join Date: Sep 2009
Location: Downtown Charlie Brown
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PQ, I've been keeping an eye on your thread, but I haven't posted because I couldn't think of anything other than a vacuum problem. It looks like that is what you're finding , but not the root cause. I'm thinking that maybe you are making a very slight amount of boost that is reducing vacuum but yet not showing a positive at idle. Maybe the supercharger bypass isn't working properly or not tuned correctly for your set up.
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08-26-2014, 02:21 PM | #66 | |
Just Because!
Drives: 2010 SIM 2SSRS Join Date: Jun 2010
Location: San Jose, Ca
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This! Bypass on my whipple went bad and reeked havoc on damn near everything. Make sure it is opening and closing properly. Mine had a hole in the diaphragm, causing vacuum leak and no boost.
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08-26-2014, 06:46 PM | #67 | |
Drives: 2011 2SS/RS IOM/PEARL STRIPES-6M Join Date: Mar 2011
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Whipple S/C, 3.750 pulley, JRE rough idle blower cam kit, Trunion upgrade, C5R timing chain, LS2 chain dampner, Melling 10296, Dynatech 1 7/8 LT headers, OR pipes, Dual valve RX catch can, ID 850 Injectors, LPE Dual fuel pump, CAI with Apex scoop, VMax ported T/B, ADM Tune 675 RWHP 560 TQ
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08-26-2014, 10:28 PM | #68 | |
Booooosted.
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Oooohhhhhhh ****!!!!! I completely forgot another and only other difference ......... I took the 1:1 pulleys off the back and went with an overdrive set. You guys thing that is it??? Last edited by PQ; 08-26-2014 at 11:11 PM. |
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08-26-2014, 10:35 PM | #69 |
Booooosted.
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Ok, this coastdown thing. What is it? Could it be the reason that it still tends to want to die after I back up as I take it out of reverse and go to drive?
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08-26-2014, 10:40 PM | #70 | |
Booooosted.
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14 month old gas and no tune. |
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