ilikefunkymusic Posted October 23, 2017 Share Posted October 23, 2017 I got an email from the tuner stating that they've "often seen issues with DW65c fuel pumps building pressure slowly" I received this message after I submitted my 2nd round of data logs. I've attached the logs from both rounds, here on this thread. I've been reading around here and on NASIOC on what could cause this, but I haven't hit on anything that really stands out yet... Each round of logs includes: cruise control log 6th gear @ around 60mph wide open throttle log 4th gear from ~2500 rpm - ~5500 rpm idle log 2008 lgtb vf52 stock injectors DW65c cobb downpipe tgv deletes cobb intake samco turbo inlet and bpv hose grimmspeed tmic I'm not trained at analyzing data logs, so I'm really interested to see if any of you have any clues as to what could be causing this? Thanks in advancewot_S_4g_78deg_1stvf52_map.csvidle_S_78deg_1stvf52_map.csvcc_S_6g_60mph_78deg_1stvf52_map.csvidle_S_60deg_2ndvf52_map.csvwot_S_4g_60deg_2ndvf52_map.csvcc_S_6g_62mph_60deg_2ndvf52_map.csv Link to comment Share on other sites More sharing options...
amm203 Posted October 23, 2017 Share Posted October 23, 2017 Can't comment on your logs but my car is very similar to your build. When my engine blew the engine builder suggested replacing the DW65c currently installed (among other things). Even with the pump only being 11 months old he said they are seeing unusually high failure rates with them and strongly suggested replacing it with an AEM unit along with the new engine build. Edit: Not trying to say the pump somehow caused my engine to blow. Just something suggested by a reputable builder to give me peace of mind with regards to fueling the new block. Link to comment Share on other sites More sharing options...
Max Capacity Posted October 23, 2017 Share Posted October 23, 2017 Funny my Tuner also recommends the AEM pump. 305,600miles 5/2012 ej257 short block, 8/2011 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. (SOLD). CHECK your oil, these cars use it. Engine Build - Click Here Link to comment Share on other sites More sharing options...
Dishwasher Posted October 23, 2017 Share Posted October 23, 2017 I have a DW65c for the past 50k miles or so without any issues. Although now I'm wondering if the early morning 2500rpm stutter is somehow related... Brought to you by Pfizer Link to comment Share on other sites More sharing options...
Gabo Posted October 23, 2017 Share Posted October 23, 2017 My DW65C burned out while tuning for E85. It was barely on it's second pull. Been running the DW300C with no issues. Link to comment Share on other sites More sharing options...
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