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s4T>s5T tach lag?

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Old 09-17-17, 09:37 PM
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Backyard Mechanic

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s4T>s5T tach lag?

Just got this thing running. Fresh rebuilt JDM s5 TII streetport with JDM trans in a s4 TII chassis. Haltech Sprint RE. Tune is limited for break in.


At Idle the car reads fine @500-600rpm. Seems to start lagging behind a bit after 2k rpm though.

Possibly need a s5T cluster?
Old 09-18-17, 09:15 AM
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I'm running same setup with stock ecu... no issues.
Old 09-18-17, 11:57 AM
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How are you verifying it's lagging? Are you making this claim based on "feel"?
Old 09-18-17, 01:17 PM
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Just got the breakin tune put on it at a shop and I believe he was comparing cluster gauge to digital gauge on laptop?

I trailed it home and just cruse in the neighborhood at 3k and under right now because I need to get water temp and oil pressure gauges working, so it's not noticeable to me yet.
Old 09-18-17, 08:01 PM
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stock tachs are always slow, its normal




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