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I've driven in the motor for about 1500kms after the new bearings and the franklin cams etc. has been installed.
Now that I'm taking it into vvl I notice that there is some issue. Whenever I keep the car in vvl for about two gears then it starts missing and sound and feel like it's running on 3 cylinders. If I then drive calmly it goes back to normal after about 10 seconds.
What could this be??
My one theory is that the injectors are operating at a duty cycle that's too high and become ustable, therefore opening 100% and subsequently flooding the motor.
Any ideas if that could be the problem or any other suggestions??
Last edited by Sabre 200 Gxi : 06-27-2006 at 11:22 AM.
I know this sounds odd but check your Alternator Voltage it could be a bad alt. it makes something similar starts missing when the vvl engages...and you don't feel a thing driving around on the low lobes. it misses like voltage like cams going on/off.
if thats fine then I would check the injectors and oil presure...what else could it be...don't know then..check that stuff and post up.
Okay thanks will check the alternator. Doesn't sound/feel like vtec cams swithching on/off like crazy. Sounds/feels more like a normal miss. Will check it to be sure though.
Oil pressure is 100%.
Funny thing is this only started after the new cams etc. Which is why I'm thinking the extra air in vvl mode makes the MAF go crazy causing the injectors to open fully.
Last edited by Sabre 200 Gxi : 06-27-2006 at 03:45 AM.
is this the same setup that made 215HP on the dyno in the franklin post ?
maybe the CR is to High from the shaven head and the car detonates ?
Quote:
Originally Posted by Sabre 200 Gxi
Here you go. It's Hyper Power dyno. This graph shows the before and after runs.
We're at over 6000ft above sea level which results in a 17% loss in performance as opposed to sea level.
As you can see from the graph power is still stricly increasing when the limiter comes in. Hoping to get the limiter issue resolved soon. Also car is still leaning out a bit from the time the vvl kicks in.
Mods are:
custom header
2.5" exhaust (crush bends)
Outlaw gaskets.
Home made CAI
Slightly shaven and ported head
I'm pretty sure that your having an oil pressure problem. In my race car I have the cam locked open (for rules) all the time. When I go into a braking zone that is long, and i'm off the gas for a while, when I roll back on the gas, the car misfires and feels like it is on the small cam. It kicks back in after about a second or so. I watch the oil pressure and it stays above 65psi but there is probably a big difference in pressure between where the oil line for the gague is and in the cam switch housing or head. You mentined you put new bearings in the motor, maby you don't have enough oil pressure to hold the big cam on. Just a thought.
I'm pretty sure that your having an oil pressure problem. In my race car I have the cam locked open (for rules) all the time. When I go into a braking zone that is long, and i'm off the gas for a while, when I roll back on the gas, the car misfires and feels like it is on the small cam. It kicks back in after about a second or so. I watch the oil pressure and it stays above 65psi but there is probably a big difference in pressure between where the oil line for the gague is and in the cam switch housing or head. You mentined you put new bearings in the motor, maby you don't have enough oil pressure to hold the big cam on. Just a thought.
I see the logic in what you're saying but the oil pressure seems fine. The previous bearings started going due to very low oil level from two leaking crank seals.
Even have an extra spacer in the oil pump to keep the pressure higher. Some ppl question this method but that's another thread all together.
Sup,
If your car is Missing or Breaking up in VVL than I bet its the VVL Solenoid itself. When i had my B14 it would break up in VVL and, i checked everything and, i found alot of oil in the solenoid and i would clean it out and, it would not break up or miss in VVL at all until it got filled up again. Check that most people overlook that let me know if that fixes it peace
no actually, you're the idiot, along w/ the guy that made this thread
i dont think you saw the title before it was edited, jerkoff. frikkin guy called his vvl, vtec.
no actually, you're the idiot, along w/ the guy that made this thread
i dont think you saw the title before it was edited, jerkoff. frikkin guy called his vvl, vtec.
I dont think it was that bad at all to call it Vtec because everybody in the world knows what Vtec stands for and when you call or quote your motor to be VVL most people around the world wouldn't know what you are talking about. Have you met this guy to call him a idiot?
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WHEN IM BIG I WANT TO HAVE MY OWN BEER TRUCK IN MY GARAGE
I dont think it was that bad at all to call it Vtec because everybody in the world knows what Vtec stands for and when you call or quote your motor to be VVL most people around the world wouldn't know what you are talking about. Have you met this guy to call him a idiot?
Guys please !!!!
Try to keep to the thread!!!
I personaly think he need to change his Plug wires and "fire" to confirm thats it not "fire" problems
More Compression and more air = More pressure inside chamber and if the pressure is just to high the spark will take the easier route!!
