C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

ARAP $6E Smoother Idle?

Thread Tools
 
Search this Thread
 
Old Aug 15, 2013 | 01:36 PM
  #21  
MrWillys's Avatar
MrWillys
Drifting
 
Joined: May 2013
Posts: 1,736
Likes: 31
From: Reno Nevada
Default

If the harmonic balancer slips the timing would not be correct. Keep it at 6 degrees, or you'll have too much at wot. Certain rpm ranges of the arap have as much as 38 degrees all in. Try setting your tps to .60 and see if it helps. That will give it a bit more fuel off idle.
Reply
Old Sep 5, 2013 | 07:38 AM
  #22  
raiderz's Avatar
raiderz
Thread Starter
Pro
15 Year Member
All Eyes On Me
Liked
Loved
 
Joined: Aug 2010
Posts: 617
Likes: 17
From: Hamilton Ontario
Default

Hey again...car was running nice for awhile...drove it very spirited the other day and now its back to the slow crappy idle.....checked the timing again and wayyy retarded.

Looks like i owe my mechanic an apology. It seems that my Harmonic Balancer has slipped/moved...he was right.

Ive have timed it by ear to get the car running "better" until i can have the HB replaced.

I also noticed a slight vibration at around 1400rpm the past little while...i hope the new balancer will correct this also

I still dont see how the engine timing can physically change because the outer core of the balancer has moved??

Can someone explain what is going on here...much appreciated
Reply
Old Sep 5, 2013 | 11:23 AM
  #23  
bjankuski's Avatar
bjankuski
Safety Car
20 Year Member
Photogenic
Liked
Top Answer: 1
 
Joined: Sep 2001
Posts: 4,165
Likes: 555
From: Glenbeulah Wi
Default

Originally Posted by raiderz
Hey again...car was running nice for awhile...drove it very spirited the other day and now its back to the slow crappy idle.....checked the timing again and wayyy retarded.

Looks like i owe my mechanic an apology. It seems that my Harmonic Balancer has slipped/moved...he was right.

Ive have timed it by ear to get the car running "better" until i can have the HB replaced.

I also noticed a slight vibration at around 1400rpm the past little while...i hope the new balancer will correct this also

I still dont see how the engine timing can physically change because the outer core of the balancer has moved??

Can someone explain what is going on here...much appreciated
The timing does not change when the balancer moves, are you sure your distributer gear is not wearing. I have seen this many times.
Reply
Old Sep 5, 2013 | 09:52 PM
  #24  
raiderz's Avatar
raiderz
Thread Starter
Pro
15 Year Member
All Eyes On Me
Liked
Loved
 
Joined: Aug 2010
Posts: 617
Likes: 17
From: Hamilton Ontario
Default

Originally Posted by bjankuski
The timing does not change when the balancer moves, are you sure your distributer gear is not wearing. I have seen this many times.
Mechanic says he checked the balancer today and said thats not the issue...he pulled the crank pulley and lined the the key notch from the new balancer to old and the timimg marks on both balancers lined up perfectly ..he says it good.

Mechanic also said he checked for play in the timing chain by grabbing hold of the balancer and turning the crank back and forth while he was under there checking the HB....very slight play in the chain(engine cold)

He is going to check the distributor gear tomorrow sometime.
The dist. was taken apart by another tech last month to change the pick up coil....you would think he would have noticed wear on the gear? maybe he buggered something putting the gear/pin back on?
Reply




All times are GMT -4. The time now is 10:41 PM.

story-0
10 Corvettes to Drive Before You Die!

Slideshow: 10 Corvettes to drive before you die.

By Joe Kucinski | 2026-06-23 08:31:12


VIEW MORE
story-1
Corvette & Porsche 911: How Two Icons Conquered the Last 25 Years

Slideshow: Corvette and Porsche 911, how two icons conquered the last 25 years.

By Joe Kucinski | 2026-06-23 08:18:33


VIEW MORE
story-2
2027 Chevrolet Silverado 1500 First Look: Everything You NEED to Know!

Slideshow: Is the 2027 Chevrolet Silverado 1500 the best Silverado yet?

By Michael S. Palmer | 2026-06-16 08:01:12


VIEW MORE
story-3
5 Best & 5 Worst Corvette Daily Drivers

Slideshow: 5 best and 5 worst Corvette daily drivers

By Joe Kucinski | 2026-06-15 10:32:13


VIEW MORE
story-4
The Headlights of Every Corvette Generation Explained

Slideshow: The headlights of every Corvette generation explained

By Joe Kucinski | 2026-06-15 10:17:14


VIEW MORE
story-5
5 Best & 5 Most Overrated Corvette Track Packages of All Time!

Slideshow: The 5 best and 5 most overrated Corvette track packages ever.

By Joe Kucinski | 2026-06-09 12:46:45


VIEW MORE
story-6
Every 2027 Corvette Engine Explained

Slideshow: Every 2027 Corvette engine explained

By Joe Kucinski | 2026-06-09 12:16:31


VIEW MORE
story-7
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette

Slideshow: A Jaguar designer's personal project imagines what a modern front-engined Corvette might look like if Chevrolet revisited the golden age of the Stingray.

By Verdad Gallardo | 2026-06-08 19:53:43


VIEW MORE
story-8
10 Ugly Corvettes That We Still Kinda Love

Slideshow: 10 ugly Corvettes that we still kinda love.

By Joe Kucinski | 2026-06-03 10:34:17


VIEW MORE
story-9
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

A lot of money has changed hands at the online auction house over the years.

By Brett Foote | 2026-06-03 10:21:50


VIEW MORE