What happen when you pull too much timings???
Thread Starter
Former Vendor
Joined: Nov 2000
Posts: 5,607
Likes: 1
From: Houston TX
What happen when you pull too much timings???
I'm planning on pulling about 4 to 6 degrees of timing when the car is on the gas (150-shot), using an on-off switch wired to the IAT sensor.
I've heard a few people mentioned that too much timings can also burn your exhaust valves. Can someone please give a detail epxlaination on what happen when you pull too much timings?
Thanks
-Tuan
I've heard a few people mentioned that too much timings can also burn your exhaust valves. Can someone please give a detail epxlaination on what happen when you pull too much timings?
Thanks
-Tuan
Le Mans Master
Joined: Aug 1999
Posts: 8,827
Likes: 10
Re: What happen when you pull too much timings??? (Tuan Le)
Tan Lee,
If you are running at least 91 Octane gas then there is NO reason to pull ANY timing with only a 150 shot. 6 degrees would be WAY too much even if you had a 200 shot. 4 degrees would be acceptable with a 200 shot. Anything more would be excessive.
Pulling timing will really slow you down. It will kill your power.
Good luck!
And remember - you have a knock sensor that pulls timing for you if you suffer from detonation.
[Modified by EdwardETraylorIII, 11:03 AM 6/4/2002]
If you are running at least 91 Octane gas then there is NO reason to pull ANY timing with only a 150 shot. 6 degrees would be WAY too much even if you had a 200 shot. 4 degrees would be acceptable with a 200 shot. Anything more would be excessive.
Pulling timing will really slow you down. It will kill your power.
Good luck!
And remember - you have a knock sensor that pulls timing for you if you suffer from detonation.
[Modified by EdwardETraylorIII, 11:03 AM 6/4/2002]
Thread Starter
Former Vendor
Joined: Nov 2000
Posts: 5,607
Likes: 1
From: Houston TX
Re: What happen when you pull too much timings??? (EdwardETraylorIII)
6 degrees would be WAY too much even if you had a 200 shot. 4 degrees would be acceptable with a 200 shot. Anything more would be excessive.
And remember - you have a knock sensor that pulls timing for you if you suffer from detonation.
Le Mans Master
Joined: Aug 1999
Posts: 8,827
Likes: 10
Re: What happen when you pull too much timings??? (Tuan Le)
"They" can speculate all day and night on how much timing to pull.
a 150 shot is not a "huge shot." If you were trying to spray 200/225 on your stock motor - then that would be a "huge" shot and require 4-5 degs of timing pulled!
I'm giving you real world results. I've sprayed over 10 automobiles of MY own (race and street) that have run from mid 8 to high 12's..... I've never pulled any timing on a 150 shot on an LS-X motor...... I've installed probably close to 100 kits on various customers and friends cars. Never have I needed to pull timing.
Do this for yourself.. Put a 150 shot on, make a pass with AT and see if it shows any knock retard? 99/100 times it won't.................... ( and that 1/100 time that it does - it will probably have been valvetrain rattle aka false knock...)
Good luck! :seeya
EDIT: attached sig...
[Modified by EdwardETraylorIII, 11:26 AM 6/4/2002]
a 150 shot is not a "huge shot." If you were trying to spray 200/225 on your stock motor - then that would be a "huge" shot and require 4-5 degs of timing pulled!
I'm giving you real world results. I've sprayed over 10 automobiles of MY own (race and street) that have run from mid 8 to high 12's..... I've never pulled any timing on a 150 shot on an LS-X motor...... I've installed probably close to 100 kits on various customers and friends cars. Never have I needed to pull timing.
Do this for yourself.. Put a 150 shot on, make a pass with AT and see if it shows any knock retard? 99/100 times it won't.................... ( and that 1/100 time that it does - it will probably have been valvetrain rattle aka false knock...)
Good luck! :seeya
EDIT: attached sig...
[Modified by EdwardETraylorIII, 11:26 AM 6/4/2002]
Safety Car
Joined: Feb 2000
Posts: 3,683
Likes: 0
From: Austria
Re: What happen when you pull too much timings??? (Tuan Le)
It was Julio@Cartek who told me not to ratard timing too much or I would melt the exhaust valves.
I have mine at 25 degrees on the 150 shot and that´s what he said would be OK.
Michael
I have mine at 25 degrees on the 150 shot and that´s what he said would be OK.
Michael
Thread Starter
Former Vendor
Joined: Nov 2000
Posts: 5,607
Likes: 1
From: Houston TX
Re: What happen when you pull too much timings???
It was Julio@Cartek who told me not to ratard timing too much or I would melt the exhaust valves.
Is it because when it ignite too late, the pistons are on the way down and may suck back in some of the hot air through the exhaust valves? :confused: :confused: :confused:
Safety Car
Joined: Feb 2000
Posts: 3,683
Likes: 0
From: Austria
Re: What happen when you pull too much timings??? (Tuan Le)
It was Julio@Cartek who told me not to ratard timing too much or I would melt the exhaust valves.Did he explain why?
Is it because when it ignite too late, the pistons are on the way down and may suck back in some of the hot air through the exhaust valves? :confused: :confused: :confused:
Is it because when it ignite too late, the pistons are on the way down and may suck back in some of the hot air through the exhaust valves? :confused: :confused: :confused:
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Thread Starter
Former Vendor
Joined: Nov 2000
Posts: 5,607
Likes: 1
From: Houston TX
Re: What happen when you pull too much timings??? (Austrian Vette)
Hey Michael,
What size of resistor did you use and what is the IAT temp when you flip it on?
On mine, the IAT reads 151-degree with a 560ohm 1/2 watt resistor. And timing was around 20 to 23 degrees. I think I'm going to replace with a 680ohm resistor bump the timing up few more degrees.
-Tuan
What size of resistor did you use and what is the IAT temp when you flip it on?
On mine, the IAT reads 151-degree with a 560ohm 1/2 watt resistor. And timing was around 20 to 23 degrees. I think I'm going to replace with a 680ohm resistor bump the timing up few more degrees.
-Tuan
Le Mans Master
Joined: Aug 1999
Posts: 8,827
Likes: 10
Re: What happen when you pull too much timings??? (Tuan Le)
Tuan,
Good idea! You'll get a few more ponies out of the car and you'll get them safely, too! :)
You don't want to retard the timing TOOO much for the obvious reasons - nitrous backfires. These are BAD, MMMkkkkk :)
Shinobi, yes I do! It's hell on wheels! I blew the clutches out this last weekend trying to make a pass on a 100 HP shot.......... :seeya
Good idea! You'll get a few more ponies out of the car and you'll get them safely, too! :)
You don't want to retard the timing TOOO much for the obvious reasons - nitrous backfires. These are BAD, MMMkkkkk :)
Shinobi, yes I do! It's hell on wheels! I blew the clutches out this last weekend trying to make a pass on a 100 HP shot.......... :seeya
Safety Car
Joined: Feb 2000
Posts: 3,683
Likes: 0
From: Austria
Re: What happen when you pull too much timings??? (Tuan Le)
Hey Michael,
What size of resistor did you use and what is the IAT temp when you flip it on?
On mine, the IAT reads 151-degree with a 560ohm 1/2 watt resistor. And timing was around 20 to 23 degrees. I think I'm going to replace with a 680ohm resistor bump the timing up few more degrees.
-Tuan
What size of resistor did you use and what is the IAT temp when you flip it on?
On mine, the IAT reads 151-degree with a 560ohm 1/2 watt resistor. And timing was around 20 to 23 degrees. I think I'm going to replace with a 680ohm resistor bump the timing up few more degrees.
-Tuan
It didn´t retard timing equal how hot the resistor showed.
So I set the timing retard table for hot temps to 5 degrees and that retards
me the timing 6 degrees whenever I flip the switch.
However, so it works for me and the 25 seem to be perfect.
Car runs faaaasssstttt :D
Michael