Cascade Crew

[91camaro_rs]

so ever since i got my car running the timing has been off but good enough to run, and i dont really have a way of timing it perfectly, so does anyone have a 91-92 timing tab? the one that is straight up and not to the side, or is there anything i can plug into the ALDL plug to check the timing, if i remember right when i was at mike's place data logging my car it read the timing at about 16* before TDC and it should be at 6. could this timing thing be the reason i run rediculously rich? i have like crap built up on my rear bumper from the unburned gas coming out of my exhaust

[aaron_sK]

When you datalog it's displaying only what the ECM thinks is the timing. When you burn a chip you tell the ECM what you have the timing set it (stock chip is 6* before, cause that's what a stock engine is supposed to run at) and it extrapolates from there. No crank position sensor in these cars, so the ECM is flying blind on timing.

[Twilightoptics]

Yeah Datalog will show you the Commanded Timing. So the timing that the ECM is "controlling."

It's "controlling" that based on the BASE setting of that 6ºBTDC.

So if you timing it at Zero.... the Datalog at the same point will still say 16º, but your actual timing will be 10.

[91camaro_rs]

so what should i do to get my car running better? having it tuned by a shop probably huh?

[alloy]

Until you get an accurate timing tab no one will be able to time the car correctly. They will just be shooting in the dark.

You can determine TDC using a piston stop and Then you can use your existing timing tab and re mark the dampner for TDC. They are available at jegs, summit, probably a local speed shop also.

You remove your #1 plug and screw the stop in. (to make it easier to turn overyou can remove all spark plugs) Now you gently turn the motor one direction with a breaker bar and socket on the crank bolt til it contacts the stop. Mark that position on your dampner using some form of reference point. The slowly and again gently turn the motor over the other direction until it contacts the stop again. Mark this position. Now you have two marks on your dampner. Measure this and exactly half way in between is TDC. Now you can accurately time the car with a timing light.


http://www.summitracing.com/parts/SUM-900189/

[aaron_sK]

@ Dan: He is running an LG4 tab with LB9 top end. It is physically impossible for him to use his current tab because it is totally blocked by the TPI throttle body.

@ Luke: Hit the JY or ePay and get the proper timing set up. Verify the dampener mark is correct using the technique Dan mentioned above, and I mentioned before, and Paul mentioned before that. Set the timing at 6* before.

Once you get that done, buy a tuning setup of your choice (I prefer Moates Burn1, but what do I know ). Get your timing table ironed out, and your temp-controlled stuff lowered to work with the lower t-stat. Then start datalogging your ass off and find out what that Summit cam likes.

[alloy]

Ok I understand he can't use the tab he has. Nothing stopping him from making a temporary timing tab out of an old coat hanger and finding TDC so he can get the car running right until the correct timing cover can be found and installed. I use a coat hanger on a front engine bolt for a pointer to degree a cam in. it's temporary but works fine for my application. Should work for him to in a pinch

[aaron_sK]

[91camaro_rs]

so if i want to get the right timing setup, what all do i need, a new damper and timing tab?

can i find it at summit?

[91camaro_rs]

i went on the moates site and i got confused, what are the exact things that i will need?

[MrMike98]

if u already have a timing tab, just find TDC per the other reply and remarke ur current dampner with a nice scribe mark for TDC then get timing tape at any auto parts store and wrap it around ur dampner starting at ur 0tdc mark.
then time it for 6 BTDC lock dist. and u should never have to touch it again.
there are several ways to do this but u do not need a new dampner.
good luck
Mike

[aaron_sK]

[Alphius]

I feel like the guy that always pimps out Summit parts, but the Summit balancer is a really nice piece for a good price. I have it on my car, it's very solidly built and is marked in single degree increments all the way to 60* around the outside. My stock balancer was slipped and no longer provided accurate timing info.

[91camaro_rs]