Generation IV Internal Engine 2005-2014 LS2 | LS3 | LS7 | L92 | LS9

UD Pulley Electrical issues Please Help

Thread Tools
 
Search this Thread
 
Old Jan 12, 2012 | 10:32 PM
  #1  
Fafonfoe's Avatar
Thread Starter
Banned
iTrader: (1)
 
Joined: Mar 2011
Posts: 128
Likes: 0
From: Louisiana
Default UD Pulley Electrical issues Please Help

I have a LS2 with a 25% UD Pulley. I put the engine in my infiniti G35 and put the pulley in during the intial swap. Problem I'm having is I'm having bad voltage drop at high RPMS and Pcm wont let me over 6500RPM. I've read that a UD pulley can cause this issue at high RPM. Has anyone ran into this problem or have any ideas why Im cutting off at 6500? 2G wires ran to alt and starter only and 2G running to both PCMs.3 Ground 2G straight to the block and two to the body. Any help would be great.
Reply
Old Jan 13, 2012 | 08:07 PM
  #2  
S10xGN's Avatar
TECH Junkie
iTrader: (11)
 
Joined: Jul 2005
Posts: 3,782
Likes: 7
From: Port Neches, TX
Default

Check the belt and tensioner, can't imagine it being an alternator problem if it's running 25% slower at 6500 than before...
Reply
Old Jan 13, 2012 | 08:10 PM
  #3  
babbage1109's Avatar
11 Second Club
10 Year Member
iTrader: (11)
 
Joined: May 2010
Posts: 1,646
Likes: 1
From: Southside,Indiana
Default

You can buy an overdrive pulley for the alternator to fix this problem.
Reply
Old Jan 15, 2012 | 07:00 PM
  #4  
Fafonfoe's Avatar
Thread Starter
Banned
iTrader: (1)
 
Joined: Mar 2011
Posts: 128
Likes: 0
From: Louisiana
Default

Its the only thing left. Belt isn't slipping. I dont have a alt. that has a changeable pulley. I'm going to put my stock pulley back on and see what happens. Remember I am powering two PCM in this car. Infiniti and E40. I have three ground directly from bat. two pos ran 2 gauge. Wiring is correct. Just when tuning the tuner say voltage starts to drop at 6K and motor wont rev anymore at 6500. Pulley is the only thing left. The car runs perfect and has no issues at all beside robbing me of a little bit more power.
Reply




All times are GMT -5. The time now is 04:31 PM.

story-0
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-1
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-2
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-3
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-4
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-5
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-6
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-7
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-8
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-9
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE