does it matter?

[spools420a]

So I have a simple question,When checking ignition timing I'm making sure its at 15 degrees btdc "second mark from right to left" now if this is on the money is it even nessasary to check if the cam timing as well?Or does it matter as long as its 15 btdc.Seems like as long as thats correct it should be good to go.Also why is it that most everyone has to place a wire from the coil to the plug to get a reading?I hooked my timing gun to the loop on the back of the valve cover and it seems to be working fine but is it as accurate?Thanks.

[murda-c]

Is this an sr20?

-EDIT: just realized it must be since the timing is 15btdc.

carry on since i know nothing about that motor haha

[spools420a]

Oh shoot sorry about that,Yes redtop sr

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yeah i think thts what the loop is for. as long as the timing is set at 15 deg. no need to check mechanical timing.

[spools420a]

Awesome thanks kidd,One more question,I installed a mbc and want to run no more then 11 psi would it be wise to retard the timing a degree or two or leave it factory timing.

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youre whole setup is stock?
just try to stay at 11psi...

[spools420a]

youre whole setup is stock?
just try to stay at 11psi...
Yea pretty much stock except
carex fmic
walbro 255 lph
turbo timer
mbc

and downpipe thats it,I'm gonna run aem wideband o2 with crapola safc with megan fpr before I bump the boost up though for starters.

[codyace]

So I have a simple question,When checking ignition timing I'm making sure its at 15 degrees btdc "second mark from right to left" now if this is on the money is it even nessasary to check if the cam timing as well?Or does it matter as long as its 15 btdc.Seems like as long as thats correct it should be good to go.Also why is it that most everyone has to place a wire from the coil to the plug to get a reading?I hooked my timing gun to the loop on the back of the valve cover and it seems to be working fine but is it as accurate?Thanks.


Sometime the rear loop works, sometime it doesn't

Sometimes hooking older timing lights right around the plug work too


15* only verifyes ignition timing. You can still have the cams 'off' the crank itself (mechanical timing) however it wouldn't run very well.

[spools420a]

Sometime the rear loop works, sometime it doesn't

Sometimes hooking older timing lights right around the plug work too


15* only verifyes ignition timing. You can still have the cams 'off' the crank itself (mechanical timing) however it wouldn't run very well.
Just a theory,wouldnt it throw a code if the cam timing was off a tooth or more?

[nosajton]

no if you were a tooth off the car would run horribly and you risk bending valves

[codyace]

Just a theory,wouldnt it throw a code if the cam timing was off a tooth or more?

No, as the only 'sensor' sort to speak is the CAS itself...so it's simply counting revolutions of the entire assembly sort to speak, not the exact count. You could be a tooth off, and it will still read the same amount of 'revoultions' per the exhaust cam.

no if you were a tooth off the car would run horribly and you risk bending valves

A tooth off would push your base timing to 19, so no it won't hurt anything. It's not good for anything either.

[nosajton]

No, as the only 'sensor' sort to speak is the CAS itself...so it's simply counting revolutions of the entire assembly sort to speak, not the exact count. You could be a tooth off, and it will still read the same amount of 'revoultions' per the exhaust cam.



A tooth off would push your base timing to 19, so no it won't hurt anything. It's not good for anything either.

i thought he was referring to a cam tooth being a degree off which would set cam timing 33 degress off total which is danger