What’s best site to buy the NX2 on? And if you don’t mind me asking how much did you guys pay to get it professionally installed? Don’t think I’m going to do mine myself either
tOK, let me share with you guys the problem that I run into.
About 3 to 4 weeks ago, I started hearing a noise everytime on part throttle, between 3500 and 4000 rpm on gear change (either on D or S). Initially I thought it was an issue with the transmission. I took the car to a friend of mine who is a mechanic and he told me that this noise is detonation! This got me worried.
A couple of days ago, on Saturday, I took the car for a long drive, about 210km each way. An Audi started following me at 180kph (112mph), so I did a wot to show him some real muscle (lol). The Accessport was connected on the car, because I was monitoring knocks on cylilders 1 to 4 and ignition timing correction on cylinders 3 and 4. During that wot I noticed a major negative correction on cylinder 3 (-6.5). So next I decided to do a datalog while on the highway and I did another wot. At around 220kph (137mph), the car went to limp mode and the AP recorded multiple knocks on cylinder 2 and 3...
The datalog was sent to my tuner who told me that the headgasket is probably staring to go. I changed the spark plugs, just to rule them out, but I still had detonation on gear change at 3500 to 4000 rpm. Apart from this detonation, the motor feels fine, like before.
I took the car to the dealership and they will install the JE Pro Seal headgasket and ARP headstuds next week.
I believe that the stock block cannot take the extra power even of a drop-in turbo. I had a near-ecoboom experience and I was lucky enough to avoid the worst... If you want my advice, an upgraded headgasket and headstuds should at least be installed alongside the PTE or any other drop-in turbo. Although forging the engine with upgraded pistons and rods would be the ideal way to go.
However I would like to hear your ideas on the above. What could be the cause of the detonation that I hear on gear change at part throttle between 3500 and 4000 rpm? And why do I get knocks on cylinders 2 and 3? Is it really the headgasket?
I appreciate the input. Also this is the link to the datalog I referred to above:
@Juben @Glenn G
Sorry to hear about your experience i dont know if it can be done on 93 as i dont have 93 here its 89 or 100 on the pumps, the stock fuel system will do a glory dyno pass at 390wph without water injection, but when racing at the track the hpfp will loose pressure on gear change, if you want more power after that you are going to need aux fueling. 31 psi seems to be near the limit of what the nx2 turbo will do, after that you will get higher psi on the midrange and it will drop down to 31 psi.You are 100% correct; these stock engines are not made for “big turbo’s” and I have had mechanics say the “built engines” Don’t support the power either. I have 2016 Eco Premium with auto trans. I have MRT race cat turbo-back exhaust, Steeda suspension, American racing wheels (staggered big with Nitto 555G2’s), Sno performance, WMI, Mishimoto oil catchcan, Turbosmart BOV (re-route, not to atmosphere), CPE Race intercooler, Roush Cold Air Intake. Unleashed tuning was calibrating my vehicle and we dyno’d it around mid August 2018, with 93 octane it was putting down 328rwhp (southern louisiana heat and humidity keep in mind)...................................................................
What are your HP/TQ (assuming you capture those on the AP) ?Last night I sent over data logs for my base tune. I received revision #1 this evening so I loaded them into the AP then went to my "testing area" to do two more 3rd gear pulls. This tune woke the car up! Looking forward to see what it's like after more revisions.