i have skunk 2 cam gears, and right now i think there advanced three. But i have a lot of bolt on work and im spraying but im only running 15.3 at the track, spraying when i hit second gear. So can some one explain how i should adjust my cam gears. Im spraying 55

 

get that sucker dyno'd. what other bolt-ons do you have?

 

need dyno..cam gears advance the timing of your engine basically to start producing a spark a little later, or earlier in your combustion chamber.

theres many things that can go wrong, mainly detonation, and advancing to a point where your not reaping the mechanical advantages of having your crankshaft at certain positions (so its easier to turn etc.)

the only way to do this properly is to dyno tune and test, otherwise you might run too high, and since your spraying you do NOT want detonation (this factor reduces as you buy higher octane, which detonates under heavier compression than a lower octane would)

-Rage

 

pulleys, apexi cat back, msd, intake, spark plug wire, fuel rail, fuel regulater, bbk fuel pump

 

then u should definetly get it tuned, especially since you made fuel mods, you can extract more power from what you have. The best would be if you dropped in cams, then tuned it, you'd see some awesome gains and really put that dyno time to great use!!

-Rage

 

Dyno tune. What type or stage are they?

 

They're gears, there is no stage.

But they're right. If you do get some cams, you will see crazy gains. You have a good setup, is your car not a GSR? Cause you should be hitting a little better than 15.3, especially if you're on the bottle.

 

my bad!!!!

 

Ok, what you want is less overlap if you're spraying. Try advancing the exhaust cam too.

By the way, if you show us your complete time slip we can help you out better.

 

Well i go to the track once a month for an event called 1320. They dont give time slips out on this day, i dont know why.

See i want to get shafts but i just dont have the money right now, what brand do you recomend.

but for this friday im going to play with the timmimg.

 

nope my car is a big body LS

 

Shouldn't he retard the exhaust side instead to reduce overlap? Advancing both just takes it back to stock just both sets of valves opening earlier. Advancing intake and retarding exhaust = intake open earlier exhaust open later = less overlap?

I'm confused



[Modified by xero-cool, 6:38 AM 7/10/2002]

 

1320 @ Brandon

 

Hrm, what you say makes better sense. I always thought advancing the intake and retarding exhaust is increasing overlap though.

 

not at barndon but at bradenton motorspot

 

I found out....it's the other way around...you're right.... meaning the exhaust valves since they are retarded (heh this is funny) will close later...and the intake valves since they are advanced will open before the exhaust side is fully closed. So overlap occurs.

quote" The valves are timed so the intake valve opens slightly before (advanced) the piston reaches top dead center (TDC) on the exhaust stroke. Likewise, the exhaust valve is timed to close just after (retarded) the piston starts down on the intake stroke. "

The objective of overlap is for the exhaust gas which is already running down the exhaust pipe, to create an effect like a siphon and pull a fresh mixture into the combustion chamber. Otherwise, a small amount of burned gasses would remain in the combustion chamber and dilute the incoming mixture on the intake stroke.

Hope that helped

 

you are an idiot.

 

Care to explain why sutrusu?

 

Dont worry, he was obviously just playing w/ the fun pictures

I agree with you... but I also have to agree that it should just be professionally dyno tuned. Someone brought up a good point about people spending thousands of dollars on performance equipment, but never properly tune it.

In many cases you make more power from tuning than from just plug and play.
Especially when using Nitrous...

just fork out the cash for the dyno, its really worth it.

If you plan on doing more mods, and are trying to keep the cost down I suggest that you keep the nitrous down for a bit, and leave the cam gears at normal position... Focus on building up your fuel system and air system.. Then get it tuned, so u only have to do it once. You SHOULD tune after any new mod.

 

maybe because cam gears have ABSOLUTELY NOTHING TO DO WITH IGNITION AT ALL????




[Modified by sutrusu, 11:06 PM 7/12/2002]

 

cut him a break, he was just thinking about ignition timing!

 

You deserve the too sutrusu

Your ignition timing on the distributor is based on the turning of your intake camshaft. Advanced intake camshaft via cam gears = advanced ignition timing also. But relative to the opening and closing of valves(camshaft), the ignition timing stays the same. Relative to the crank, ignition timing is advanced also.



But I agree Rage is an idiot.




[Modified by xero-cool, 1:23 AM 7/13/2002]