I have installed a Hypertech stage 2 chip
but I believe that what you might call the base line ignition advance is still at the factory setting. Wouldn't that be at the zero mark? The question is would it be wise to advance the timing in addition to what the chip is supposed to do and if so to what degree (approx)should it be advanced. I'm really interested in optimizing engine tuning to get the best possible performance with what I have invested so far. I have never adjusted timing so please be specific.


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Black 1989 RS Convertible w/43,000 mi.
Excellent Condition
LO3 305 w/TBI
Open Element 14x3 K&N
Hypertech Thermomaster
160 Degree Thermostat
Low Temp Fan Switch
Eddlebrock Performer Muffler
No Cat
B&M Stage 2 Shift Kit
17"x9" ATP 5 Spoke Alloys
P 245/45 Goodyear Eagle
HP Ultra Plus Tires
Lakewood Rear Control Arms

 

Unplug the brown wire on the passenger side firewall, and then move your timing to about 8-10 degrees and you will notice a nice increase in throttle response. Don't go to high for fear of detonation and high heat in the cylinder walls. You will be safe around 8 degrees.

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1988 TA 300+hp 350 w/ TBI and Holley TB unit, Holley projection intake,
WC T-5, 3.42 gears w/ Auburn posi. MSD 6A, edelbrock TES headers, dynomax 3" cat and cat-back system, ACCEL coil, polyurethane bushings all around, aluminum driveshaft, Mr. Gasket open air cleaner.

1993 S-10 w/ 4.3L V6 TBI, slightly bigger cam, Mild polish job and 3 angle valve job on heads, Edlebrock TES headers, Dynomax cat back, MSD 6A, ADS chip

2000 Kawasaki KX 125

 

the hypertech chip might be adding a few degrees to stock so 8 might be high but those chips have also been known to have little to no changes

best advice i can give you is to play with it and see what it runs best at

use the procedure bad bird 88 outlined unplug the tan/black wire its brownish really and its exposed over on the left side youll see it coming out of the engine harness by your AC drier

 

I set mine to 4* advance, less of a heating problem, but then it gets very warm around here.. 95 to 105 for most of the summer. And racing it doesnt help cool it. Still have good throttle respone too. Mine is a 92 RS

 

I don't understand, Why are we unplugging the brown wire and when are you plugging it back in? If at all. Is that so the computer doesn't un-do what you are doing? Can you guys give some details? That would be great.

Eric

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Teal 1991 Camaro R.S., T-Tops,
Leather, Re-worked 700r4 also w/kit,
MSD ignition, MSD 8.5 mm. superconductor wires,
MSD Coil, ADS superchip, Open element air cleaner,
K-n-N filter, Gutted cat, Flowmaster cat-back system,
Edelbrock TES headers, March 3piece billet underdrive pulleys
3.73 gears
http://www.geocities.com/gitarz2/camaro.html
I was shocked to see that companies sold a taillight
set for a rustang! Since when do they have taillights????

 

Unplugging the brown wire disconnects the ECM from the distributor to allow setting of the base timing. If you don't unhook this your ECM will keep trying to retard the timing to where it thinks it should be. Usually 2-4 degrees is about all the car will tolerate with a hot(read aftermarket)chip. A stock chip will probably allow more. With my Jet stage 2 chip I run 2 degrees advance on the base with good results but anything more and it falls off.

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Mongoose-NCTGA-1990 Pontiac Formula/305 TBI-700R4 with Edelbrock Performer TBI intake,TES headers,and STB,K&N,MSD-6AL,Holley laser shot coil,Accel Extreme 9000 wires,Jet Stage 2 chip,TCI shift kit with corvette servo,Richmond 3.73 gear with Auburn 3 series posi,no cat,SLP 3" cat back,Eibach sportline springs,Energy Suspension poly throughout,Lakewood LCA and adjustable panhard bar package,SSM subframe connectors,IROC wonder bar,Tokico 5 way adjustable struts and shocks,Autometer electric fuel pressure gauge,Alpine,JL Audio,MB Quart,92 GTA taillights,92 GTA aero wing and hatch,Steve Spohn LCA relocater kit,MacEwen White face gauges,84 T/A cold air induction air cleaner.

 

You will need to hook the brown wire back up when you're finished or it will cause a code 12 for no distributor reference signal.


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Mongoose-NCTGA-1990 Pontiac Formula/305 TBI-700R4 with Edelbrock Performer TBI intake,TES headers,and STB,K&N,MSD-6AL,Holley laser shot coil,Accel Extreme 9000 wires,Jet Stage 2 chip,TCI shift kit with corvette servo,Richmond 3.73 gear with Auburn 3 series posi,no cat,SLP 3" cat back,Eibach sportline springs,Energy Suspension poly throughout,Lakewood LCA and adjustable panhard bar package,SSM subframe connectors,IROC wonder bar,Tokico 5 way adjustable struts and shocks,Autometer electric fuel pressure gauge,Alpine,JL Audio,MB Quart,92 GTA taillights,92 GTA aero wing and hatch,Steve Spohn LCA relocater kit,MacEwen White face gauges,84 T/A cold air induction air cleaner.