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04-10-2019
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#1 |
 
Join Date: Mar 2018
Location: Norway
Posts: 345
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LT5 rev limit
What is the norm when it comes to the rev limiter on people's ZR-1's? I have been up towards 8000 rpms and never had any cut-off of any kind...Is this normal?
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Roy Martin 1994 ZR-1 #112 Admiral Blue/Black Dana 4:10 Aluminum flywheel Corsa exhaust Watson headers Haibeck chip 470 HP/399 RWHP 1991 ZR-1 #400 White/Red (SOLD) Dana 4:10 Powder coated engine Haibeck performance chip Borla exhaust |
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04-10-2019
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#2 | |
 
Join Date: Jul 2012
Location: Allentown, PA
Posts: 309
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Re: LT5 rev limit
Quote:
Sent from my HTC U11 using ZR-1 Net Registry mobile app
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'95 ZR-1, aqua/gray, #167 368 LPE/Haibeck, Web cams, Stainless Works headers, B&B Fusion exhaust, 18" Fikse wheels, Alcon brakes, lowered. 491 SAE RWHP. |
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04-10-2019
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#3 |
Join Date: Nov 2007
Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri
Posts: 6,493
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Re: LT5 rev limit
The stock cutoff is approx. 7100, unless like mine it has been boosted to accommodate the extended power curve (resulting from porting and cam phasing).
But, it could be your tach is reading high - which is quite common as result of deterioration of the resistor voltage divider board on the instrument cluster. For example, before I recalibrated it the tach read 8000+ when in fact actual rpm was 7000 rpm. There is a procedure to recalibrating the tach, i.e., determining the proper resistance and replacing the stock resistor board with the correct resistors replacing the stock board. However, BATEE now provides new resistor board replacements, so now a simple board swap is all it takes to recalibrate the tach.
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Good carz, good food, good friendz = the best of timez! 90 #1202 "FBI" top end ported & relieved Cam timing by "Pete the Greek" Sans secondaries Chip & dyno tuning by Haibeck Automotive SW headers, X-pipe, MF muffs Former Secretary, ZR-1 Net Registry Last edited by Paul Workman; 04-10-2019 at 05:41 AM. |
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04-10-2019
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#4 |
Join Date: Jun 2006
Location: Sparks, NV
Posts: 2,852
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Re: LT5 rev limit
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90'ZR-1 #1461 Red/Black Ported Intake, Degreed Cams, OBX Headers & Exhaust, Fidanza FW, Secondary Delete, Custom tune, C6 GS Wheels. Sold 08 C6 Z51 Crystal Red Metallic Sold Vararam Intake, Tune, Sold 05 C6 Z51 Red/Black Sold 90'ZR-1 #1723 Black/Gray Sold but not forgotten 91' Z51 L98 White Vert. My First, you always remember your first. Sold. |
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04-10-2019
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#5 |
Join Date: Nov 2010
Location: Omaha
Posts: 402
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Re: LT5 rev limit
Probably your tach being way off in your dash cluster. Before sending mine off to Batee, I could literally pin the tach needle without hitting the limiter. Was probably off over 2,000rpm.
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Evan
2023 70th C8 HTC, 94 Admiral Blue ZR-1 SOLD - 2012 Carlisle Blue Metallic ZR1 - 800HP SOLD - Steel Blue 91 391cid ZR-1 #391 SOLD - Black 91 ZR-1 |
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04-10-2019
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#6 | |
Join Date: Sep 2008
Location: Mullica Hill, New Jersey
Posts: 2,566
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Re: LT5 rev limit
Quote:
And Batee is THE place! Marty |
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