Cam surge cure?
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Cam surge cure?
Just installed a TR224/112 and have a slight surge at anything under around 1800 rpm. I have a custom tune from Diablo with some timing added at idle, idle speed set to 825-850, and the throttle follower tables tweaked. Does drilling a hole in the TB blade help the most with this or will working on the VE tables take care of it? Thanks guys!
John
John
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Thanks for all the help Cal! I really appreciate it. The car may just need some learn time also. I put about 30-40 miles on it last night after the install and about 20 on it this moring. Changed the oil, heat cycled the springs two times with some spirited driving after the first one (5K), and now it is time for 8 AM drive to work traffic!
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It doesn't mater what the IAC's are as long as they aren't hitting the end of the range on either the min. or the max. I think the range is zero to 128. Alot of people try to get them around 40 to 50 at idle with the A/C off and the motor at operating temp. That way it has some room to go under higher demand like fast idle or with the A/C on.
Also, if you are running too much ignition timing, it can make the engine surge a lot.
Also, if you are running too much ignition timing, it can make the engine surge a lot.
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Cal,
Did you drill your TB? I don't think the timing is too high as I only added 2 degrees from 400-1000. The car is insanely rich at idle. Will adjusting the VE tables take care of most of that? Starting out with 65-75-85. Waiting on Diablo to do it for me.
Did you drill your TB? I don't think the timing is too high as I only added 2 degrees from 400-1000. The car is insanely rich at idle. Will adjusting the VE tables take care of most of that? Starting out with 65-75-85. Waiting on Diablo to do it for me.
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I have the same cam on a 114ls and mine is VERY rich also at idle. I even have the VE scaled down 70-80-90% from 400-1200. When is was scaled down further, the car surged more and had a slight hesitation starting off. My timing tables are currently stock. My idle is set at 850rpm, and my TB hole is drilled to 3/16" (IAC counts are around 35 warm).
I would think adding some timing may halp make a more complete burn at idle reducing some of the rich smell?
I would think adding some timing may halp make a more complete burn at idle reducing some of the rich smell?
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My car is so rich at idle that it will smoke a little on occassion. It's all fuel too! Usually after running it hard and coming back to idle. Any of you guys experience this?
1fastWS6,
Thanks for the info buddy. I drilled my tb to 3/16 early this morning and I'm waiting on Diablo to get the software needed to scale the VE tables. When you scaled the tables down did it affect your LTrims any? Thanks!
John
1fastWS6,
Thanks for the info buddy. I drilled my tb to 3/16 early this morning and I'm waiting on Diablo to get the software needed to scale the VE tables. When you scaled the tables down did it affect your LTrims any? Thanks!
John
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I looked at my edit file and my timing is set stock at idle. I would tweak the injector flow rate table a little for the ltft being a little rich. And check the iac it should be around 50. just sounds like you need some idle tuning.I have a pretty big cam and with the right tune you should loose the surge.
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Originally Posted by Slowhawk
VE and timing tables will ussualy get rid of rich smells.You want to set the timing so it doesn't bounce around.
TIA,
#16
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Originally Posted by John02SS
Cal,
Did you drill your TB? I don't think the timing is too high as I only added 2 degrees from 400-1000. The car is insanely rich at idle. Will adjusting the VE tables take care of most of that? Starting out with 65-75-85. Waiting on Diablo to do it for me.
Did you drill your TB? I don't think the timing is too high as I only added 2 degrees from 400-1000. The car is insanely rich at idle. Will adjusting the VE tables take care of most of that? Starting out with 65-75-85. Waiting on Diablo to do it for me.
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Originally Posted by 1fastWS6
Which table do I need to add timing in? Is it the High Octane, Low Octane, Base Spark in Drive, or Base Spark in Park tables?? When does the PCM use the Base Park and Drive tables anyway for an M6 car? And, since my idle is at 850 rpm, would I just add timing from 1000 rpm and under?
TIA,
TIA,
400=18 degrees
800= 24 degree's
1000=24 degrees
1200=24 degree's
1600=28 degree's
1800=30 degree's
2000 and up=34 degree's
Do the whole columns.
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John, how are you verifying that your rich, other then the occasional smoke? I have predator tuning, surge in P/N only, and hook it up to my wideband, it is stocihly perfect 14.7:1, smells rich as hell due to the CATs that went away. Also, I get the occasional smoke from the engine going rich as I shut down, coming down from a higher rpm to idle quickly then off, startup and puff.
food for thought
food for thought
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CAT3,
The fuel smell is bad and it acts up at idle when it starts smoking. It has gotten pretty bad though. It would have to be rich with that much smoke. I can handle the occasional puff or two, but it smokes pretty good at times.
Thanks for all the inof guys!
The fuel smell is bad and it acts up at idle when it starts smoking. It has gotten pretty bad though. It would have to be rich with that much smoke. I can handle the occasional puff or two, but it smokes pretty good at times.
Thanks for all the inof guys!