JohnBradley's 2.2 long rod build
Jan 20, 2011, 07:30 PM
#481
I had taken him for rides in at 680 and he was pretty impressed. He drives it at 30-31psi which is around 710-725whp right now. I am going to try some slightly different GSC grinds and see what we get. The T4 T/S is looking like it will just go to my 2G Auto Drag car instead.
Jan 20, 2011, 11:24 PM
#482
Evolving Member
My preferred method is to trust the knock sensor and knock count. I know there are times where it doesnt want to track so I have to get creative. I only push my own stuff this hard to be able to learn what is going on. I think in this case my issue is based on valvetrain noise and the exhaust dump since it doesnt do this on the street.
Like Tom pointed out, racegas and detcans go a long way to making sure I know whats happening one way or another. Almost all my experience of what is safe and not safe is based on a completely stock motor running high boost so I compare logs from the 574 stuff to the 648, compare the timing, test, etc. I do not tune by EGT, I have never found it to be useful in anything other than a diesel.
Like Tom pointed out, racegas and detcans go a long way to making sure I know whats happening one way or another. Almost all my experience of what is safe and not safe is based on a completely stock motor running high boost so I compare logs from the 574 stuff to the 648, compare the timing, test, etc. I do not tune by EGT, I have never found it to be useful in anything other than a diesel.
The knock sum steps up right after the voltage spike, then the knock sum comes back down in steps, not real fast, which is by design so it's ok. I'm still at a low power level though, so, just kind of looking ahead to what might happen when all hell gets loose at high power levels.
I guess some people think the 1g knock sensor doesn't even work. I think they work great when they are reasonably new. You just need accurate measurement on them because their output is low. A knock spike is only about 1 volt. Cruise noise level on mine (stock pistons, original engine w about 140,000 miles) is about 0.4 volts.
Jan 22, 2011, 12:07 PM
#483
I am trying to figure out (been trying for awhile actually) how to boost the logging rate so I am getting a clearer picture of what is going on. Really I am about 7 samples a second or something mind numbingly slow. I have been thinking about a standalone system for a few reasons, one being sampling rate won't be terrifically decreased like I am facing now.
2G auto might get shelved, have some new thoughts on my Evo again.
2G auto might get shelved, have some new thoughts on my Evo again.
Jan 23, 2011, 12:52 PM
#485
I was thinking Motec, but the Pro EFI would do it to. I have 4 toys right now, adding the 2G doesnt seem to be practical since I have too much maintenance and not enough time....not too mention it costs to keep them all running.
To do List
Make the Evo the car it should be (Magnus Dry sump, revise pistons, engine management, cams, cage, etc.)
Turbo the Chevelle (just because)
Keep both turbo quads running and the drag quad breaking records
Maintain all of these
To do List
Make the Evo the car it should be (Magnus Dry sump, revise pistons, engine management, cams, cage, etc.)
Turbo the Chevelle (just because)
Keep both turbo quads running and the drag quad breaking records
Maintain all of these
Feb 16, 2011, 03:05 PM
#491
have you ever tried running it on dyno with no exhaust at all? im sure you'd get the 800+ then easy. 30whp loss just from a different muffler...
how much sound difference was the new vs old? did it make it a lot quieter? i bet my exhaust system is restrictive as hell also.. since i have a cobb they are really quiet.
how much sound difference was the new vs old? did it make it a lot quieter? i bet my exhaust system is restrictive as hell also.. since i have a cobb they are really quiet.
Feb 16, 2011, 03:31 PM
#493
Evolved Member
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have you ever tried running it on dyno with no exhaust at all? im sure you'd get the 800+ then easy. 30whp loss just from a different muffler...
how much sound difference was the new vs old? did it make it a lot quieter? i bet my exhaust system is restrictive as hell also.. since i have a cobb they are really quiet.
how much sound difference was the new vs old? did it make it a lot quieter? i bet my exhaust system is restrictive as hell also.. since i have a cobb they are really quiet.
