Dont know where to put my timing for power??
#1
Senior Member
Thread Starter
iTrader: (1)
Join Date: Jun 2006
Location: Oviedo,Florida
Posts: 692
Likes: 0
Received 1 Like
on
1 Post
Car: 86' Trans am
Engine: 85 LG4-non cc carb(building a 350)
Transmission: Rebuilt 700R4,vette servo,2200stall
Axle/Gears: 2.73 Posi
Dont know where to put my timing for power??
i cant figure where to put my timing for the most power right now i have it 4*btdc i dont no if thats a good spot -- my motor is a 85 305 with a non cc qjet, elderbrock intake, a lil cam dont know what it is but i think i have one, hedman headers shorty, and 3" flomaster 80 series catback..o and all the emissions are gone as well as the computer its running 60's style
#2
Supreme Member
Join Date: Oct 2006
Posts: 1,974
Likes: 0
Received 0 Likes
on
0 Posts
Car: 91 RS
Engine: 350 vortec
Transmission: T-5
Axle/Gears: not the best not the worst
Re: Dont know where to put my timing for power??
hey i think you have a cam in that motor too but then again i think every fbody has a cam....
but with your timing you need to advance it as far as possible untill it pings under heavy load then back it off a couple of degrees...
how is your timing advance controlled?
but with your timing you need to advance it as far as possible untill it pings under heavy load then back it off a couple of degrees...
how is your timing advance controlled?
#4
Senior Member
Thread Starter
iTrader: (1)
Join Date: Jun 2006
Location: Oviedo,Florida
Posts: 692
Likes: 0
Received 1 Like
on
1 Post
Car: 86' Trans am
Engine: 85 LG4-non cc carb(building a 350)
Transmission: Rebuilt 700R4,vette servo,2200stall
Axle/Gears: 2.73 Posi
Re: Dont know where to put my timing for power??
12* adv or retard.....if your looking at the engine standing in front of the car retard is to the left and advanced is to the right...right..o its a Hei wit vacuum advanced
#5
Senior Member
Join Date: Mar 2007
Location: Central Illinois
Posts: 343
Likes: 0
Received 0 Likes
on
0 Posts
Car: 89' Pontiac Firebird
Engine: L03 carb Ported #87s new shortblock
Transmission: 700r4
Axle/Gears: 2.73 open
Re: Dont know where to put my timing for power??
hey it might not have a cam
maybe some put a rotary in it?
maybe some put a rotary in it?
#7
Supreme Member
iTrader: (1)
Join Date: Sep 2005
Posts: 26,458
Received 1,839 Likes
on
1,399 Posts
Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: Dont know where to put my timing for power??
Adjust timing slightly.
More power? Yes/no...
Yes: Adjust it some more the same direction
No: Adjust it the other way
More power? Yes/no....
Yes: Adjust it some more the same direction
No: Adjust it the other way
More power? Yes/no....
And continue until all you get is "no", no matter which way you adjust it.
Then AND ONLY THEN, the timing will be where the motor makes the most power.
Notice at no time did I say anything about a light, or numbers, or what somebody else's car runs like, etc.
More power? Yes/no...
Yes: Adjust it some more the same direction
No: Adjust it the other way
More power? Yes/no....
Yes: Adjust it some more the same direction
No: Adjust it the other way
More power? Yes/no....
And continue until all you get is "no", no matter which way you adjust it.
Then AND ONLY THEN, the timing will be where the motor makes the most power.
Notice at no time did I say anything about a light, or numbers, or what somebody else's car runs like, etc.
Trending Topics
#8
Senior Member
Thread Starter
iTrader: (1)
Join Date: Jun 2006
Location: Oviedo,Florida
Posts: 692
Likes: 0
Received 1 Like
on
1 Post
Car: 86' Trans am
Engine: 85 LG4-non cc carb(building a 350)
Transmission: Rebuilt 700R4,vette servo,2200stall
Axle/Gears: 2.73 Posi
Re: Dont know where to put my timing for power??
advanced it to the left and retard is to the right if your looking down with a light??--how much more power could i gain from doin this??
#9
Supreme Member
iTrader: (1)
Join Date: Sep 2005
Posts: 26,458
Received 1,839 Likes
on
1,399 Posts
Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: Dont know where to put my timing for power??
Does it matter which way is which?
Adjust it. Better/worse?
Better: adjust it some more.
Worse: adjust it back to where it was, and just a little further.
Better/worse?
Repeat until ideal is achieved.
Does the light matter? Does that process mention a light anywhere? Does the engine whup out it light and look at some mark someplace, and decide accordingly how it's going to run? Well since it doesn't, then the light is of no value whatsoever, except to know AFTER you do the above tuning, where it is, so you can put is back in case you disturb it.
Who knows how much power you could gain? That would depend on, among other things, how far away from "optimum" it is now. Maybe none if it's already "perfect" (what the engine wants), maybe ALOT if it's a long way off.
Adjust it. Better/worse?
Better: adjust it some more.
Worse: adjust it back to where it was, and just a little further.
Better/worse?
Repeat until ideal is achieved.
Does the light matter? Does that process mention a light anywhere? Does the engine whup out it light and look at some mark someplace, and decide accordingly how it's going to run? Well since it doesn't, then the light is of no value whatsoever, except to know AFTER you do the above tuning, where it is, so you can put is back in case you disturb it.
Who knows how much power you could gain? That would depend on, among other things, how far away from "optimum" it is now. Maybe none if it's already "perfect" (what the engine wants), maybe ALOT if it's a long way off.
#10
Member
iTrader: (4)
Join Date: Nov 2003
Location: Texas, Nowhere But Texas
Posts: 309
Likes: 0
Received 2 Likes
on
1 Post
Car: 1991 TransAm GTA 350
Engine: 350 SBC TPI
Transmission: 700R4
Re: Dont know where to put my timing for power??
On your antique setup you have much to experiment with and to get it right may well ultimately involve re-curving your distributor (easily done on a distributor machine). Turning the distributor is a good way to experiment but it changes the timing across the board and you might find yourself with an engine that cranks hard. Mr. Klaus Allmendinger (very smart guy) of Innovate Motorsports wrote a paper debunking among others, the myth about advancing until it detonates as being the best place to have your ignition timing. It is a very good read and should help you understand not only where you want to get your timing, but why you want it there. http://www.innovatemotorsports.com/resources/myths.php
Enjoy
Enjoy
Thread
Thread Starter
Forum
Replies
Last Post
Iroc8t8
TPI
43
08-26-2015 08:14 AM
novaderrik
Transmissions and Drivetrain
3
08-10-2015 12:44 PM