engine problems
10-19-2016, 01:04 PM
#3
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That's what my dyno looked like when I was spinning.
Did you do a MPH graph as well? My speedo was pegged at 155, dyno rollers showed I was only doing 95. Still make 575whp lol.
Did you do a MPH graph as well? My speedo was pegged at 155, dyno rollers showed I was only doing 95. Still make 575whp lol.
10-19-2016, 01:09 PM
#4
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ls2, afr 225 72cc
aps twin turbo(mitsubishi td06-20g)
this dyno was on 14 psi wastegate spring
91 pump gas, 80lb injectors 450lph in-tank pump
http://www.racetronix.biz/itemdesc.a...000267&eq=&Tp=
built 4l60 with precision or yank converter, cant remember which one
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10-19-2016, 03:50 PM
#10
im not saying its the issue but 14 psi and 16* timing is fairly aggressive for 91 pumpgas. that is unless your iat's are very cool. id say drop timing and see if it likes it you might be getting some detonation.
I lot of guys have gotten away with more but not every combo is the same.
I lot of guys have gotten away with more but not every combo is the same.
10-19-2016, 04:03 PM
#11
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im not saying its the issue but 14 psi and 16* timing is fairly aggressive for 91 pumpgas. that is unless your iat's are very cool. id say drop timing and see if it likes it you might be getting some detonation.
I lot of guys have gotten away with more but not every combo is the same.
I lot of guys have gotten away with more but not every combo is the same.
10-19-2016, 10:09 PM
#12
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Valve float, high back pressure from those small turbos can cause this if you dont have a heavy enough valve spring, also check plug gaps are tight , around 20" thou
10-19-2016, 10:16 PM
#13
what boost controller? It looks like you hit the boost warning/control setting on a profec-B spec-II (or similar) dropping boost suddenly to some preset level.
usually, use SMOOTHING=0 for diagnosis. The "5" setting is for showing off the curve, it may mask issues with the engine.
Also an AF curve would be nice. but overall it just looks to be regulated, purposefully, you kind of see a little spike right before it occurs, which further emphasis on the control aspect.
usually, use SMOOTHING=0 for diagnosis. The "5" setting is for showing off the curve, it may mask issues with the engine.
Also an AF curve would be nice. but overall it just looks to be regulated, purposefully, you kind of see a little spike right before it occurs, which further emphasis on the control aspect.
10-19-2016, 10:26 PM
#15
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what boost controller? It looks like you hit the boost warning/control setting on a profec-B spec-II (or similar) dropping boost suddenly to some preset level.
usually, use SMOOTHING=0 for diagnosis. The "5" setting is for showing off the curve, it may mask issues with the engine.
Also an AF curve would be nice. but overall it just looks to be regulated, purposefully, you kind of see a little spike right before it occurs, which further emphasis on the control aspect.
usually, use SMOOTHING=0 for diagnosis. The "5" setting is for showing off the curve, it may mask issues with the engine.
Also an AF curve would be nice. but overall it just looks to be regulated, purposefully, you kind of see a little spike right before it occurs, which further emphasis on the control aspect.
10-20-2016, 12:02 PM
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10-22-2016, 07:07 AM
#19
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Post boost curve, post AFR curve.
And is this repeatable on the dyno...and does the car exhibit the same behaviour on the road, and in every gear ?
and the CR is not a problem.
And is this repeatable on the dyno...and does the car exhibit the same behaviour on the road, and in every gear ?
and the CR is not a problem.
