going with meth, i think 8:5 is just fine... less boost for more power. i knew 8:5 would b more sensitive to knock on pump, reason i have meth.
7.5:1 would have been less sensitive to Knock from the start and the power increase from being able to run a bit more timing would offset the incredibly small gain from the slightly higher comp and at nearly the same cost.
higher comp on a turbocharge engine is a compromise strictly to improve OFF BOOST drivability,, no more.
Water injection is always to be considered a BANDAID solution and should not be considered as a integral part of the engine/turbo/fuel design. EI: build it right so you don't need the added cost and complexity of WI.
You can't do anything about it now but its food for thought for next time.
Heres my last log, and the 6kr at 6k is showing up there. NOTHING till that 6k mark WHAT is up with this???? why hasent dsp figured out why we get this?
Ill lower timming a tad in 5-6/6-7 range -2 and see what happens, this was at night with new D60 on 18 psi. getting full spool at 3500 not bad for 3rd gear. Once i get meth pump i HOPE to see this 6k bs go away. Makes me mad, cause they it trys to pull LT knock through the whole rpm.
Heres my last log, and the 6kr at 6k is showing up there. NOTHING till that 6k mark WHAT is up with this???? why hasent dsp figured out why we get this?
Ill lower timming a tad in 5-6/6-7 range -2 and see what happens, this was at night with new D60 on 18 psi. getting full spool at 3500 not bad for 3rd gear. Once i get meth pump i HOPE to see this 6k bs go away. Makes me mad, cause they it trys to pull LT knock through the whole rpm.
Don't make any drastic changes just yet.
Log again but this time try to make several pulls on 1 log. Several pulls on 1 log can catch odd anomalies that sometimes show up on a single pull.
In this case: Your last log only showed 2KR at that spot so the 6Kr max is odd to me. Right where your knock spikes, you have a strange spike in the RPM. Since you also have a coresponding jump in MPH at the same spot, it looks like you probably hit a bump in the road and the wheels spin for an instant. A quick jar to the car can effect the Knock sensor directly but also the PCM will pull timing if it thinks the RPM are out of control(rise too quickly) and that pulled timing has been known to show up as KR on logs.
Also email me your tune. I'm thinking it maybe lacking some needed adjustments to a few MAX/MIN limits.: dave @ trojahn,com
Logged PIDs need work: Your missing ACT, BARO and you don't have the correct ECT.
Last edited by duster360 : 11-06-2009 at 08:22 AM.
Now some times on start up ill gets some misfires, to night cylind 1 missfired 32 times before firing..... IM gonna take a wack at it and say stock coil pack.... 80k+ miles... yes its the orginal lol With old msd wires.... Also noitcing im getting some st knock from 4500 up 2-3 some times 5-6, Im gonna guess my pack or wires are getting weak??? Could that cause misfires and knock being its not a very strong spark.
Runnin iridum one step colder plugs... Same plugs when the motor blew up, but they looked ok? Should i also get some different plugs?? Hope to see this knock and mis fires disapear Does not miss fire on wot, just some times on cold start up and at idle...
Misifres do not have anything to do with Knock but you should get it fixed anyway.
The PCM ramps up the coil's current under WOT so that's probably just masking the misfires. I start by get some fresh plugs in there. Coils do wear out over time and produce lower outputs as they get older. If it were my car I'd just find a new or low milage stock coil.
Personally I haven't had much luck with MSD wires lasting more than 2-3years. Any good spiral wound wire will work. A few local autoparts store's premium house brand wires are sprial wound.
If any oil is leaking into the spark plug tube, that would cause misfires too.
Last edited by duster360 : 11-22-2009 at 11:45 AM.
24 psi, no water meth horrible issues with traction on the dyno and only took 2 hours to dial in the pump gas tune. If I would have taken more time to get this dialed in a little better we could have made 575 or more. We are planning a 28 psi pump gas + WI tune that should put us at 600 WHP with our daily driver tune.
7.5:1 would have been less sensitive to Knock from the start and the power increase from being able to run a bit more timing would offset the incredibly small gain from the slightly higher comp and at nearly the same cost.
higher comp on a turbocharge engine is a compromise strictly to improve OFF BOOST drivability,, no more.
Water injection is always to be considered a BANDAID solution and should not be considered as a integral part of the engine/turbo/fuel design. EI: build it right so you don't need the added cost and complexity of WI.
You can't do anything about it now but its food for thought for next time.
Duster, I am going to disagree with you on the higher compression builds. Higher compression on race gas will always net you better HP and TQ numbers and a faster car at the track. Now I am sure that we were talking about pumps gas, but saying that its a compromise is really not a fair thing to say in a gerneral term.
But... we ran our car at a managable 7.8 to 1 compression because we wanted to make 600 WHP on pump gas with WI on the car. Is this a bandaid? Well, not really. When you build a car to make high HP on pump gas you have to take things like compression ratio and WI into account. Can you make 600 WHP on 93 octane with our car? I highly doubt it, but I never thought I would see a 16g on a Mitsu make 600 WHP and that just happend last month (yes a stock EVO turbo made 600 WHP last month).
Every build is different, some want to try the high compression (like the Hondas) and others want to run a 7.0 to 1. Each build has a design behind it that the customer has in mind and what there goals are.
Now some times on start up ill gets some misfires, to night cylind 1 missfired 32 times before firing..... IM gonna take a wack at it and say stock coil pack.... 80k+ miles... yes its the orginal lol With old msd wires.... Also noitcing im getting some st knock from 4500 up 2-3 some times 5-6, Im gonna guess my pack or wires are getting weak??? Could that cause misfires and knock being its not a very strong spark.
Runnin iridum one step colder plugs... Same plugs when the motor blew up, but they looked ok? Should i also get some different plugs?? Hope to see this knock and mis fires disapear Does not miss fire on wot, just some times on cold start up and at idle...
Get new plugs, there is a good chance that one of the plugs when the motor let go either got hit by debris or was washed out/over heated. You could have a crack in the insulator that is not visible to a visual inspection.
got new plugs, runs a little better but still had some misfire issues..... Getting stock oem coil should be here in a day or so. Checked my msd wires still 35-36 resistance.
I think i need a different dump tube, i just cant get this tube anywhere that does not vibrate or rest on something, now its on my lca out the side neat the right front wheel, have a feeling could still throw some vibes and get some false knock readings... May just have to buy the agp dump so its not "resting" on anything. Thought about sheet metal screwing it to the car some how?
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not bad for 3rd gear. Once i get meth pump i HOPE to see this 6k bs go away. Makes me mad, cause they it trys to pull LT knock through the whole rpm. 
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