Car has a pulley and headers. When trying to make a dyno pull the car surges like the throttle is closing. Anyone have any idea what this could be?
Car has a pulley and headers. When trying to make a dyno pull the car surges like the throttle is closing. Anyone have any idea what this could be?
Here's a scan showing the surge
Need to post your tune file. The stock estimated MAP setting is 190kpa, and that's when your surge happens. Up that value to something like 250. Its probably opening your bypass valve on the blower. If that setting is still stock
Last edited by ABADZL1; 01-15-2018 at 06:17 PM.
RPS Twin Carbon Clutch
Kook's Headers
Ported Supercharger
Cold Air Inductions cai
ID850's
GPTuning 2.5 Cam
9.1 Lower 2.5 Upper
Hard to tell without the tune, but this is typically the max boost limit settings of the supercharger parameters... Just raise them up, should go away after that...
2010 Vette Stock Bottom LS3 - LS2 APS Twin Turbo Kit, Trick Flow Heads and Custom Cam - 12psi - 714rwhp and 820rwtq / 100hp Nitrous Shot starting at 3000 rpms - 948rwhp and 1044rwtq still on 93
2011 Vette Cam Only Internal Mod in stock LS3 -- YSI @ 18psi - 811rwhp on 93 / 926rwhp on E60 & 1008rwhp with a 50 shot of nitrous all through a 6L80
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It was still at 190, raised it to 250 like stated. I'll try it in the morning and see if that's it. I sure hope so this has been aggravating.
Still does it with the kpa raised to 250.
Can you give me a log with these PIDs? I believe this is TQ management. So in looking at tune I hope your fuel is 95 Octane or better. Lots of timing for a 14psi stock build in a ZL1. I have attached a tune that may fix your issues. DO NOT use the O2 settings as yours have a flaw in them from HPT and are reading the wrong values. The rest including timing I would use. Log with attached PIDs would be nice.
Last edited by jsllc; 01-16-2018 at 12:43 AM.
latest file attached has stock boost settings
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Changing the boost setting fixed it. Thanks y'all
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