I have a 92 Formula with the WS6 handling package and 1LE special package. You can see my mods in my sig.

Anyway, from my understanding..the majority of TPI owners's stock timing setting is generally 3btdc through 6btdc. Well I went and checked mine last month and it was at 10! actually a little over. I never have touched the timing on this car. I am the 2nd owner. The first was a 56 year old lady who lived in the same town and I know she didn't touch it. Anyone else have a similar experience? I don't hear a knock so I guess everything is fine. Maybe GM tuned the car in the factory? thats my only guess.
thanks fellas

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'92 Formula
305 TPI
Mods: SLP catback,SLP air foil,ported plenum,Crane AFPR,MSD6AL,homemade cold air,K&Ns,3:73s

[This message has been edited by theformula (edited October 13, 2000).]

 

If she had a tune up done, the mechanic may have bumped up the timing thinking that it would help, and it probably did. Thats all I can think of.

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1987 Chevy Camaro IROC-Z
L98 TPI 350 (5.7L)
TH 700R-4 Transmission with 2.77:1 Rear End

Current Mods: Edelbrock TES 1 5/8" Headers, Hooker Aerochamber Cat-Back System, Performance Resource Chip with 160* Thermostat, Accel Ignition Components, K&N Filters, All Free Mods, Falken ZIEX Z-Rated Tires.

Best ET : 14.32 @ 97.7mph
(corrected for elevation)

 

Possibly. Believe this or not..the lady who owned the car never serviced it. She changed the oil only a few times! Thank god it had low low miles when i got it.

SOME PEOPLE..i do not understand. If it wasn't for me that car would be dead.

 

Did you disconnect the EST line before putting the light on it?

 

Nope, I did not disconnect anything .

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'92 Formula
305 TPI
Mods: SLP catback,SLP air foil,ported plenum,Crane AFPR (49psi),MSD6AL,homemade cold air,K&Ns,3:73s,JET fan switch...SLP 1 5/8ths are coming...oh yes

 

disconnect the EST , brown single wire by the blower motor then check your timing. It will be lower for sure

 

yes by disconnecting the electronic spark bypass, the computer will not increase the timing for idle. usually 10-12deg 500-800rpm.
so it is possible that the timing is retarded
1 or 2deg. and she probably only used the low octane fuel. 10deg spark lead (inital) is very common for performance. and you may want to use a better octane fuel to control detonation.
airdeano

 

So thats the proper way to advance timing? Disconnect the EST? I won't get detonation at idle by doing that (since I'm 10btdc idling)?

So much stuff to learn. So should i do this?

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'92 Formula
305 TPI
Mods: SLP catback,SLP air foil,ported plenum,Crane AFPR (49psi),MSD6AL,homemade cold air,K&Ns,3:73s,JET fan switch...SLP 1 5/8ths are coming...oh yes

 

Yep, it's the proper (and only) way of setting the base timing. You definitely won't get any detonation as all you're doing is keeping the computer from adding timing. Too much timing is one way of getting detonation, so you're safe there. To answer your last question: Just do it!

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Greg Westphal
'87 IROC 305TPI/A4

 

Im suprised the thing idles. With my est hooked up my car has 25 deg @ idle, with 6 deg base.

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87z 383,afr 190's, crane hyd roller(224/230-.509/.528,112 sep),Ported and polished mini ram, 24lb inj, 3.42 gears, strange 12 bolt, tremec 5spd, , 1,3/4" slp headers.(stock 305 hypercrap chip), other stealth goodies.
Runs 14's all day long.

 

Because you have a performance PROM (chip)..

Mine is the same.


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86 Camaro Sport
383 Speed-O-Motive Crate Engine, Trick Flow Heads, 58mm Accel TB, 3.73 Auburn Pro, SLP Cold Air Induction and Headers, Dynomax Cat-back, Serpentine belt setup.