Give this a thought on advancing timing

[toby bean]

In the new GMHTP magazine there was a 350 T/A that had advanced the timing 12* and upped the fuel to 51 base lbs and changed back to the stock chip to go from like 14.00 quarter to 13.6 quarter. Previous owner seems to have done this to my truck as my timing was advanced 11-12* and fuel was set to 55base lbs. WTF? Now I get 11* of knock retard at WOT because of this. What was the reasoning for this change?

 

[jwaller]

the reason for this is an owner that is either:
1. very old school
2. knows nothing about turboed engines
3. knows nothing about an ECM
4. combo of all the above

 

[myclone]

or reads too many hot rod/car craft magazines...

"Old School"... Hmph... My feelings are still hurt...

 

[toby bean]

Someone here ws suggesting it to someone here on one of the threads that had some mods and I was wondering why about that too. What good would it help on our trucks even modded?

 

[Buster]

On 2001-10-26 06:50, buckwheat wrote:
Someone here ws suggesting it to someone here on one of the threads that had some mods and I was wondering why about that too. What good would it help on our trucks even modded?

RAACCR suggested it because the guy posting the question has a cam. In your case it's not a good idea until you get a real grip on your tune, even with a well tuned truck running 11 degrees advanced is really wild, even with a full tank of C-16(116 octane).

 

[jwaller]

that guy was me. and the reason was BC I am running a big cam and Vortec heads. It only become nessassery when you have this type of combination. DO Not advance the timing on a stock truck. don't do it. you will have severe detonation problems.

 

[toby bean]

I didnt. The previous owner did. I have to get it back to 0*. Just wondering why my previous owner may have thought this a good idea?

 

[Buster]

On 2001-10-26 11:33, jwaller wrote:
that guy was me. and the reason was BC I am running a big cam and Vortec heads. It only become nessassery when you have this type of combination. DO Not advance the timing on a stock truck. don't do it. you will have severe detonation problems.

How much more timing are you running? Do you just need more initial timing or throughout the entire rpm range? Do the 772s need more timing than the L-35s? Sorry about the 20 question's, just figured I'd blast them out all at once.

 

[jwaller]

I am having to run 20deg more base timing than stock. I have vortec's but they are not the 772's. I can only imagine they would need the same. just to keep it running smooth and keep good drivablility. however this is only in vacume.. I run stock or close to stock timing in boost.

 

[UNIsackV6]

On 2001-10-26 04:03, jwaller wrote:
the reason for this is an owner that is either:
1. very old school
2. knows nothing about turboed engines
3. knows nothing about an ECM
4. combo of all the above

I'm going with 4 :wink: Only 9 degrees of advance eventually torched my stock motor so Mr. Wheat if you blow your motor you know you have to go Oddfire, BowTie, Stroker, Huge Turbo, Air to Air, SpeedPro, 96LB injectors, Pontiac Intake, 4L80e trans, All Gear Xfer Case and a 9 inch rear end. Oh yeah and a you'll need upgraded fuel pump

_________________
Ryan
'92 Odd-Ty
Engine by Ultratech
Drivetrain by Roadmaster
Every other wacky thing compliments of Rich "Pablo" Eartly and Brian "Rastaman" Green

<font size=-1>[ This Message was edited by: OddfireV6 on 2001-12-11 17:55 ]</font>

 

[GM TURBO]

Hey Ryan, can you give me a hand advancing my timing 9 degrees - I would be interested in one of them thar motors you are talkin bout :smile:

 

[Daron]

I run my base timing advanced when I run good gas. 4 degrees makes a huge difference in 1/8th mile times. If only I was chip literate enough to give myself more timing at the low end and then back it off after 3500 rpm...

_________________
Daron
1992 Typhoon Blue/Gray
1991 Syclone Best 1/4 12.42 @ 106.1
Member Of Freakin' Ohio (MOFO) SyTy

Where's KaK?

<font size=-1>[ This Message was edited by: Daron on 2001-12-12 20:32 ]</font>

 

[UNIsackV6]

Dave come on over we'll advance your timing no problem, just get ready to empty your pocketsa and bang your head against the wall a lot. I'm to the point where I feel like a one legged cat trying to bury turds on a frozen pond :wink:

Daron I know people who can help you do this if you're really interested?

 

[Daron]

Thanks Ryan. Brian motivated me to get busy with my chip learning. I have a burner and most of the software, but lack the step by step knowledge. I have decided to change that and ordered an eraser and some chips.

BTW, timing can be played with but being diligent about monitoring plugs and knock sensors is imperitive to keeping the motor together IMHO. I go in small increments and found when running 118 octane mixed 50/50 with 93, you can get away with alot of tweaking. Doing it in the chip is preferable though.
Thanks again,
Daron

 

[Daron]

Thanks Ryan. Brian motivated me to get busy with my chip learning. I have a burner and most of the software, but lack the step by step knowledge. I have decided to change that and ordered an eraser and some chips.

BTW, timing can be played with but being diligent about monitoring plugs and knock sensors is imperitive to keeping the motor together IMHO. I go in small increments and found when running 118 octane mixed 50/50 with 93, you can get away with alot of tweaking. Doing it in the chip is preferable though.
Thanks again,
Daron

 

[UNIsackV6]

On 2001-12-18 19:10, Daron wrote:
Thanks Ryan. Brian motivated me to get busy with my chip learning. I have a burner and most of the software, but lack the step by step knowledge. I have decided to change that and ordered an eraser and some chips.
[quote/]

Good man, how exactly did he motivate you :wink:

BTW, timing can be played with but being diligent about monitoring plugs and knock sensors is imperitive to keeping the motor together IMHO. I go in small increments and found when running 118 octane mixed 50/50 with 93, you can get away with alot of tweaking. Doing it in the chip is preferable though.
Thanks again,
Daron

Unfortunately not everyone (read almost nobody) is as careful and experienced as you so...going off of what Buckwheat said I'd say don't do it, but if was to follow your proven method or get an Ultimate he should be able to play nicely with the rest of the kids

 

[Daron]

Good man, how exactly did he motivate you :wink:

He said he would post pics of me and BW gang bangin his dog... So I bought a chip eraser and some chips.

 

[UNIsackV6]

On 2001-12-27 12:36, Daron wrote:

Good man, how exactly did he motivate you :wink:

He said he would post pics of me and BW gang bangin his dog... So I bought a chip eraser and some chips.

Thats there what I would call MOTIVATION!!! 8-0 Speaking of motivation start planning a trip to ChiTown in say April or May if you know what I mean. :wink:

 

[GM TURBO]

If I hadn't seen Ryan's truck in person - I would think this truck doesn't exsist. It is always the same story - "Just wait" :wink: Dammit - I want a ride!!!

 

[UNIsackV6]

On 2001-12-27 16:54, GM TURBO wrote:
If I hadn't seen Ryan's truck in person - I would think this truck doesn't exsist. It is always the same story - "Just wait" :wink: Dammit - I want a ride!!!

Oh its exists and it's alive and moving under its own power for the first time in 2.5 years...vid to come soon...good rides should be forthcoming...lata