03-29-2024, 06:45 PM | #1 |
Drives: 2013 zl1 Join Date: Apr 2023
Location: Wi
Posts: 74
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Aftermarket Tac needed after mods?
So curious on what the good folks here have done post mods regarding monitoring RPMs given mods move the redline up?
Ie..after cam, headers, porting blower, e85 convert, performance clutch….etc. my mech said redline will now move up higher.. given that…have many of you have aftermarket tacs vs just staying with standard knowing that redline is now starts 1k or 1.5k rpm’s higher? |
03-30-2024, 05:10 PM | #2 |
Drives: 2013 ZL1 Join Date: Sep 2021
Location: Virginia
Posts: 369
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Why change the tach, it will still read fine. If your mechanic is telling you your redline is now 7,200-7,500 rpm you might want to do some math with the pulleys you are running, the engine might live but the blower probably wont.
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03-30-2024, 06:24 PM | #3 |
Drives: 2013 zl1 vert Join Date: Dec 2018
Location: Rochester, New york
Posts: 1,048
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Good point bsn. I'm right at the edge of blower speed with 2.5 and 9.55. why would you put in a aftermarket tach? Im assuming you are a 6 speed car because you are worried about the tach. wait and see were the dyno says the hp and tq drops off.
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22% lower/ 2.5 upper/ 2” headers/ cat delete/ x-pipe/ 2 gallon x tank/ 100-3 pump/ fic 1300/ dsx aux kit/ 103mm throttle body/ RPM 5” intake/ meth kit/ prometh lid injection/FI interchiller/ 160* stat/ ngk-7/ msd wires/ elite catch can/ tsp cam/ Che trunnions/ ported supercharger/ 1/2” lid spacer/ brick mod/BMR toe and trailing arms/ 751hp 757 tq SAE @17.3lb on a loaded dyno.
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03-31-2024, 06:01 PM | #4 |
Drives: 2011 SS-RS Join Date: May 2011
Location: FLORIDA
Posts: 11,765
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No need for an aftermarket tach. With all my mods, yes it moved my power band to the right from where it was, but my stock tach still reads very well up to the 7500 rpm we pulled on the dyno. In driving my shift points are set to 7000, and my redline is set to 7200.. I'm an auto.
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TSP STAGE 3 CAM,231/246 @112 LSA 614/641 LIFT, CIRCLE D 5C-4200-4500 CONVERTER,LOD INTAKE.CORSA EXHAUST. DSS 1 PC DS. PEGASUS SOLID CRADLE MOUNTS. 486RWHP/475RWTQ.LOTS MORE.
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03-31-2024, 06:11 PM | #5 | |
Drives: 2013 zl1 Join Date: Apr 2023
Location: Wi
Posts: 74
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Quote:
I saw a couple options at car shows… some looked like crap..some looked more integrated (digital).. |
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