How low for timing to be dangerous?
I would just reduce your boost level. You cannot force a car into accepting too much boost. I will either take it and like it or it won't. There are many factors contributing to what an engine will accept.
Your timing numbers are an indicator that you are trying to force the car. I would revamp the whole map based on lower boost.
7* at 7500 is ridiculous. There are pumpgas cars running 35psi boost at 7*.
I would reduce the boost until the car will accept a minimum of 11-13* at that rpm.
Your timing numbers are an indicator that you are trying to force the car. I would revamp the whole map based on lower boost.
7* at 7500 is ridiculous. There are pumpgas cars running 35psi boost at 7*.
I would reduce the boost until the car will accept a minimum of 11-13* at that rpm.
With 4 degrees at peak tq climbing to 7 degrees at 7500, I will mostly see no more than 1 count through the pull, but when doing constant pulls or just 1 out of 4 pulls on average I will see anywhere from a 5 count up to 10....this usually isnt at the same rpm and it usually doesnt hold throughout the pull.
Do you have lean spool enabled?
There has to be a mechanical cause to the type of knock you are seeing. I have run 91 pumpgas cars far harder with far more timing. Are there any mechanical changes to the engine itself? How intermittent is the knock and can you lift and reply 100% throttle and either make it appear or disappear? What intercooler are you using (what are the underhood IAT), were the lifters properly bled, is there anything possibly touching the downpipe?
There has to be a mechanical cause to the type of knock you are seeing. I have run 91 pumpgas cars far harder with far more timing. Are there any mechanical changes to the engine itself? How intermittent is the knock and can you lift and reply 100% throttle and either make it appear or disappear? What intercooler are you using (what are the underhood IAT), were the lifters properly bled, is there anything possibly touching the downpipe?
Thanks
Just a quick question are you running a cat? And if so was it checked to make sure it didn't melt on heat or a rich afr?
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Joined: Nov 2007
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From: Trinidad
what rom are u using? had a similar problem where the car would apply timing from a map(still did not figure out where lol) and i would get a lot of knock no matter what timing i put into the map.
aaron
Compression test shows great actually, have not done a leak down. Clutch is a old exedy stage 1 that was in the car when I bought it, it hasnt slipped at all yet and my ears at least cannot hear any clutch noise.
Have you tried making a set of det cans? Maybe you could hear mechanical noise that is unusual that way?