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Forced Induction Turbo, Supercharger, Methanol, Nitrous |
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06-14-2018, 09:09 PM | #43 | |||
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The drop off and oscillations are because of the tune, because of fuel cut. The fuel cut is because of an excessive amount of boost or bad boost reading. If there is excessive boost then something mechanical is most likely the problem. If it is a bad reading then the map sensor is bad or the tune is calculated for a different sensor. Quote:
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06-15-2018, 03:52 AM | #44 | |
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I assume no analogue gauge to compare it to?
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06-15-2018, 10:55 AM | #45 | |
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06-15-2018, 11:01 AM | #46 | |
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06-16-2018, 11:12 PM | #47 |
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Any news in this cause? I am really interested if tou already sorted out what is it?
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06-16-2018, 11:19 PM | #48 | |
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06-20-2018, 01:17 AM | #49 |
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tuner confirmed the overboost. he said it seems the wastegate isnt seeing any pressure and the car is hitting overboost fuel cut. i took the wastegate apart again. checked it and to me it worked fine. tested it with the small spring again and i blew on the hose. i could see the wastegate starting to open. made sure i placed diaphragm correctly. put everything back together but keep getting the same issue.
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06-20-2018, 03:17 AM | #50 |
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As I asked before, what is the MAP when the engine isn't running? It should be around atmospheric pressure. And the same at idle?
You now really need to verify the readings with a manual gauge or work out why the wastegate is not working.
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06-20-2018, 12:47 PM | #51 | |
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06-20-2018, 12:48 PM | #52 | |
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06-22-2018, 02:07 AM | #53 |
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update.
took a compressor and started testing the wastegate with different springs. the 7psi setup (red and natural spring) opened up at around 15 psi. red spring, wg was fully open at ~12 psi. natural spring( 1.8psi according to the manual) fully open at around 4ish psi. 4psi setup (natural and yellow) opened up at around psi. i drove the car with the natural spring which barely made any boost. drove fine. tested the 4 psi setup and the car seems to drive well. did couple wot pulls and no boostcut, which is good. which means the turbo is sending boost signal properly, wastegate opens, but i still have an overboost issue. i did not log anything because i didnt have my laptop with my. ill do some. logging tmrrw, send it to tuner and ill post a copy here so you guys can check them out. i have 2 hypothesis, one being the springs rates are a bit off(unlikely) . or i am somehow creating a leak in the diaphragm installing the stiffer springs( wg is in the car so its a bitch to get the stiffer springs in.) Sent from my VTR-L09 using Tapatalk |
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06-22-2018, 03:02 AM | #54 | |
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The product page says the Turbosmart 38mm wastegate has a 74mm diameter diaphragm/master collar size. From the table, the only spring you should have in there is the pink spring to achieve 7psi. Black alone will achieve 3 psi, grey will achieve 5 psi, pink 7 psi and red 14 psi. According to the second chart the black and grey are inner springs, so they can't be combined, but you could do the pink with the black or grey to make 10 or 12 psi, respectively. The yellow and the raw springs are for 84mm and 98mm diaphragm wastegates, respectively, which are the Turbosmart 45mm and 50mm/60mm, respectively--again, not the 38mm. Where did you get these other springs? I would make sure you have the right setup. Maybe I am confused, but it seems the wastegate should have come with one 7psi spring--the pink spring. If you wanted more boost you could add the black to the pink to get 10psi or the grey (not raw) to the pink to get 12psi or put a red spring in solo to get 14psi. https://system.na3.netsuite.com/core...=clear&whence=
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06-22-2018, 12:01 PM | #55 | |
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06-22-2018, 02:16 PM | #56 | |
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