NA powerband changed on a reman after 6500 miles???
#1
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NA powerband changed on a reman after 6500 miles???
street ported series 5 NA, 6500k miles on a reman with carbon apex seals, high volume oil pump, shimmed relief valve (85 PSI), new injectors, platinum plugs, header, presilencer, cat back, ignition box, and air filter.
i installed myself, and followed breakin to the proverbial 't'. the engine made great power, with a wide powerband 4k to 8k.
recently, i have noticed a considerable drop in torque from 4 to 5.75 os so when the VDI kicks in, wether i am at wot or atleast 50% into the pedal. I advanced the timing about 1.5 deg, and it seemed to smooth out the distinct torque hit at 5.75.
i doesnt feel like the engine makes as much power as it did before the torque loss. also, i dont think its a bad apex seal since the engine behaves as it always has after 6k.
it just seems the engine is weaker in the lower rpm range.
any ideas?
i installed myself, and followed breakin to the proverbial 't'. the engine made great power, with a wide powerband 4k to 8k.
recently, i have noticed a considerable drop in torque from 4 to 5.75 os so when the VDI kicks in, wether i am at wot or atleast 50% into the pedal. I advanced the timing about 1.5 deg, and it seemed to smooth out the distinct torque hit at 5.75.
i doesnt feel like the engine makes as much power as it did before the torque loss. also, i dont think its a bad apex seal since the engine behaves as it always has after 6k.
it just seems the engine is weaker in the lower rpm range.
any ideas?
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You have carbon apex seals, those seal best at high RPM's. Rev it up to 8k and see how she pulls, if you have FCD rev it to 9k and I bet she still pulls. And don't worry about detenation!
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i have the same problem with no power in the range of when the vdi should be switching over. it just seems flat.
my 6 ports are a little sticky though i have noticed.
do non-functioning/weak 6 ports cause the vdi switching over to make less power?
my 6 ports are a little sticky though i have noticed.
do non-functioning/weak 6 ports cause the vdi switching over to make less power?
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