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Big Turbo Discussion Thread #2
- Thread starter GTR_Killer
- Start date
You transfer parts over from the blown engine to the new one? Might want to take into consideration one of those parts might be faulty and causing your timing pull. Not sure what blew your last engine but I have a good idea lol. If you're running the same tune as the last engine, yeah I'd switch.
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wndwsdwngti860
Upsidedown
whole new short block. head was cleaned and UV tested. all new components (basically brand new head). all new chains, guides, tensioners, every gasket changed. injectors cleaned and resealed. Basically everything that is mechanical, sensor, or used to seal...is brand new.
At this point yes i am leaning towards the tune. everything else i am confident in what i have built and do this on a day to day basis. this one issue has me extremely puzzled but it all points to the tune.
wndwsdwngti860
Upsidedown
ps- this was what happened on the last motor. this is cyl 1
That's the part that doesn't make sense to me, at 6600 he's at 3* timing angle -12 on 1&4 and about -10 2&3. I thought it wasn't possible to pull timing beyond the ignition angle?
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a3scott20
Ready to race!
Pulling -12deg of timing like this?
I think that is something like protection and car will not pull that hard like before. BTW, this log was made from a friend of mine and he was trying to make his intake piping from titanium but with wrong MAF sensor height. The problem solved by making the same height as OEM MAF sensor.
wndwsdwngti860
Upsidedown
Difference is his timing is 3* and pulling -12 somehow lol
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Cadubya
Autocross Newbie
wndwsdwngti860
Upsidedown
wndwsdwngti860
Upsidedown
ok so a little update:
That -12 deg log was taken back in 2013 on a different tune. I had logged the same parameters this time around and it happened to be on the same log.
GIAC is now recommending that my DV recirc is not properly setup being it Ts in after the MAF and not Ys in. Could this be an issue?
Also that i have a TTRS lpfp could be causing part throttle issues and to swap it back and see if that helps. (not that hard of a option to change or try)
But would anyone forsee any of this being an issue before i go back in digging?
waiting on new lips for my wheels to go out and take a new set of logs but is any of this worth my time going in and fucking around? im just kinda tired of being told everytime i take a log or ask for a file update or tweak that something is wrong with my setup or "they dont like it"
That -12 deg log was taken back in 2013 on a different tune. I had logged the same parameters this time around and it happened to be on the same log.
GIAC is now recommending that my DV recirc is not properly setup being it Ts in after the MAF and not Ys in. Could this be an issue?
Also that i have a TTRS lpfp could be causing part throttle issues and to swap it back and see if that helps. (not that hard of a option to change or try)
But would anyone forsee any of this being an issue before i go back in digging?
waiting on new lips for my wheels to go out and take a new set of logs but is any of this worth my time going in and fucking around? im just kinda tired of being told everytime i take a log or ask for a file update or tweak that something is wrong with my setup or "they dont like it"
I have my DV re-circ tied in just like yours and have a TTRS pump and controller and don't have those issues.
Either you have a bad tune issue or a bad hardware (build) issue. Since none of this was happening before I'd tend to think build issue, but that's just me. Have you verified compression/leakdown?
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wndwsdwngti860
Upsidedown
i knew someone here has the same setup! just forgot who.
The motor is brand new. maybe 3k miles on it. last compression test i did was right before i started the top mount project back in jan/feb and all was good. keep in mind this was happening before then as well