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

L98 Performance Timing

Thread Tools
 
Search this Thread
 
Old Apr 7, 2011 | 09:56 PM
  #41  
aklim's Avatar
aklim
Team Owner
Active Streak: 60 Days
Community Builder
Liked
Loved
 
Joined: Jul 2004
Posts: 28,502
Likes: 3,302
From: Hartford WI
Default

Originally Posted by GREGGPENN
Base timing for my 89 is 6. That's the factory setting.

Didn't understand your slight response either.
Yes it is.

My point was that if another tech removes the distributor and does not know about the different base timing that was set, he might not set it the way it was set up originally
Reply
Old Apr 7, 2011 | 09:59 PM
  #42  
aklim's Avatar
aklim
Team Owner
Active Streak: 60 Days
Community Builder
Liked
Loved
 
Joined: Jul 2004
Posts: 28,502
Likes: 3,302
From: Hartford WI
Default

Originally Posted by l98tpi
WTF?? Do you know what you are talking about? My tuner sets up plenty of performance Vette's. Many of which do TT's or autox. I have no complaints with my perfromance.
I can't help it if you don't understand what you are reading. I don't care who your tuner is or what he sets it up for. As to your having no complains, I care about it even less. Your opinion is meaningless. The dyno tells if it is maximized or not. If your butt dyno is that accurate, perhaps we could all skip the real dyno and have you evaluate the performance for the tuners.

If you have dispute what what I said, feel free to explain what your dispute is instead of making a broad statement that is highly expressive but totally lacking in content.
Reply
Old Apr 7, 2011 | 10:37 PM
  #43  
USAsOnlyWay's Avatar
USAsOnlyWay
Le Mans Master
20 Year Member
Conversation Starter
All Eyes On Me
 
Joined: Dec 2002
Posts: 5,270
Likes: 3
From: Seattle Area WA
Default

Originally Posted by grantar2
1990 Corvette, aftermarket chip, 160 thermo Bosch match flow injectors, otherwise stock. Primary use autocross, frequent 2nd gear redline, Fuel Chevron 92, Oil Mobil One. Pretty basic. Engine has 127K miles on it. Replacing the O2 sensors, and having the timing checked before this weekends Pro Solo at El Toro. Is there a safe (no risk of detonation or other bad things) timing advance that would add a little performance. I understand 4 degrees positive is max? don't know if that is true.

Thoughts are welcome.
You are fine to bump it a few.

Want the quick and dirty way to know if you should?

Go out with your timing light to a flat stretch of road with some way of marking points. Accelerate (lets say the speed limit is 70, which is a good number for 2nd gear auto-x'ing too I'd bet) from say 1000 RPMs in 2nd gear to the speed limit or some RPM where you decide to stop the timer.

Time this and repeat at least 3 times. The time should be pretty consistent. Pull over, bump timing 2 deg, repeat 3x+. Did the time drop?

Repeat with timing at 10*, did the time drop?

Without a dyno, this is the quick and easy way to test if it is worth it. Your car will be fine with 6-12 but I'd bet 10 will be tops for any improvement.
Reply
Old Apr 7, 2011 | 10:53 PM
  #44  
GREGGPENN's Avatar
GREGGPENN
Race Director
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Nov 2003
Posts: 12,221
Likes: 446
From: Overland Park Kansas
2020 Corvette of the Year Finalist (appearance mods)
C4 of Year Winner (appearance mods) 2019
Default

Originally Posted by USAsOnlyWay
Go out with your timing light to a flat stretch of road with some way of marking points. Accelerate (lets say the speed limit is 70, which is a good number for 2nd gear auto-x'ing too I'd bet) from say 1000 RPMs in 2nd gear to the speed limit or some RPM where you decide to stop the timer.

Time this and repeat at least 3 times. The time should be pretty consistent. Pull over, bump timing 2 deg, repeat 3x+. Did the time drop?

Repeat with timing at 10*, did the time drop?

Without a dyno, this is the quick and easy way to test if it is worth it. Your car will be fine with 6-12 but I'd bet 10 will be tops for any improvement.
Reasonable approach!

Reply
Old Apr 8, 2011 | 01:15 AM
  #45  
grantar2's Avatar
grantar2
Thread Starter
Burning Brakes
15 Year Member
 
Joined: Mar 2009
Posts: 830
Likes: 6
Default

Replaced the 02 sensor and fixed a bad hub, car feels much better to my butt dyno.
Reply
Old Apr 8, 2011 | 04:14 PM
  #46  
GREGGPENN's Avatar
GREGGPENN
Race Director
20 Year Member
Liked
Loved
Community Favorite
 
Joined: Nov 2003
Posts: 12,221
Likes: 446
From: Overland Park Kansas
2020 Corvette of the Year Finalist (appearance mods)
C4 of Year Winner (appearance mods) 2019
Default

Originally Posted by grantar2
Replaced the 02 sensor and fixed a bad hub, car feels much better to my butt dyno.
Oh, for crying out loud!!!



Now you have to "F" with the timing anyway!!!!

Reply
Old Apr 9, 2011 | 10:08 AM
  #47  
l98tpi's Avatar
l98tpi
Max G’s
Supporting Lifetime Gold
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Nov 2008
Posts: 2,751
Likes: 79
From: Monroe OH
NCM Sinkhole Donor
Default

Originally Posted by aklim
I can't help it if you don't understand what you are reading. I don't care who your tuner is or what he sets it up for. As to your having no complains, I care about it even less. Your opinion is meaningless. The dyno tells if it is maximized or not. If your butt dyno is that accurate, perhaps we could all skip the real dyno and have you evaluate the performance for the tuners.

If you have dispute what what I said, feel free to explain what your dispute is instead of making a broad statement that is highly expressive but totally lacking in content.
FYI, the car was dyno tuned, not butt dyno tuned. I stated that in my earlier post. They went through 3/4 tank of fuel to get there. And when I stated that I am satisfied with performance, I am due to results on the course, not from my ***, altough it does feel good.

This being said, grantar2, since you got me in this argument with the blond, why don't you test different base timings and let us know what you come up with. I think USAsOnlyWay is a good approach.
Reply
Old Apr 9, 2011 | 08:25 PM
  #48  
aklim's Avatar
aklim
Team Owner
Active Streak: 60 Days
Community Builder
Liked
Loved
 
Joined: Jul 2004
Posts: 28,502
Likes: 3,302
From: Hartford WI
Default

Originally Posted by l98tpi
FYI, the car was dyno tuned, not butt dyno tuned. I stated that in my earlier post. They went through 3/4 tank of fuel to get there. And when I stated that I am satisfied with performance, I am due to results on the course, not from my ***, altough it does feel good.

This being said, grantar2, since you got me in this argument with the blond, why don't you test different base timings and let us know what you come up with. I think USAsOnlyWay is a good approach.
You were the one that started with the who's who as far as your tuner and how it feels. Just because John Lingenfelter tuned my car doesn't mean anything as who your tuner is. I made a simple statement that either you didn't understand or cannot. The point was simple. You can set the program in the chip around the base timing. Lets start with that and see if you can have a valid point.

You got yourself into any dispute. If you can't be civil and dispute something, feel free to ignore me.
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

2027 Chevrolet Silverado 1500 First Look: Everything You NEED to Know!

 Michael S. Palmer
story-1

5 Best & 5 Worst Corvette Daily Drivers

 Joe Kucinski
story-2

The Headlights of Every Corvette Generation Explained

 Joe Kucinski
story-3

5 Best & 5 Most Overrated Corvette Track Packages of All Time!

 Joe Kucinski
story-4

Every 2027 Corvette Engine Explained

 Joe Kucinski
story-5

Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette

 Verdad Gallardo
story-6

10 Ugly Corvettes That We Still Kinda Love

 Joe Kucinski
story-7

Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

 Brett Foote
story-8

10 Things Every Corvette Owner Needs (2026 Edition)

 Michael S. Palmer
story-9

8 Most "Only Corvette Owners Understand" Quirks and Problems

 Pouria Savadkouei




All times are GMT -4. The time now is 01:18 PM.

story-0
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-1
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-2
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-3
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-4
Every 2027 Corvette Engine Explained

Slideshow: Every 2027 Corvette engine explained

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


VIEW MORE
story-5
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-6
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-7
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
story-8
10 Things Every Corvette Owner Needs (2026 Edition)

Slideshow: 10 great gifts Corvette enthusiasts actually want for Father's Day!

By Michael S. Palmer | 2026-06-03 15:43:40


VIEW MORE
story-9
8 Most "Only Corvette Owners Understand" Quirks and Problems

Slideshow: These are the quirks, annoyances, and oddly lovable problems that every Corvette owner eventually learns to live with.

By Pouria Savadkouei | 2026-05-28 09:31:39


VIEW MORE