Quote:
Originally Posted by FoundNemo
Cheers! Of note, this is also with the knock sensitivity back to completely stock values. CSP Headers are truly no joke and do not need desensitization of the sensors for false knock from header noise, which is a major boon in my opinion. My buddy is thrilled.
We tested the theory by upping running the MS109 blend (5 gallons) with 93 and with stock sensitivities for knock to see if any false knock came on. Not a hint of it.
Last step is to run through the blended gas and see how the car handles 23.5 degrees of timing with the headers on straight 93 in the heat. If it starts pulling timing for real knock, we'll back her down to 22-22.5 and set her in place for the long haul.
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Is it the thickness of the tubes that have a bearing on that? One thing I noticed with a set of Kooks I had (1 7/8" for a truck) was the tubes seemed thinner than I would've expected. I realize thicker tubes mean smaller ID, but I'd sacrifice whatever flow/scavenging that might reduce (I doubt anything...) for being able to use stock sensitivity, as exaggerated as it might be.
Just make sure not to rape your ignition tables. Let that MAT-table work for you.
Quote:
Originally Posted by Camaro1973
Start your pull at 3rd,4th I like using 4th. Start at 2000rpm, slowly go into the throttle then lay the hammer down until 6500. You’ll be able to go through all cylinder air masses and rpms to check for knock.
In a safe place of course.
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That's what I did. I don't know where my head was at, but I was trying from a dig on street tires and it was so difficult to maintain any traction, which meant I wasn't getting any low-RPM data. I finally took my head out, and put the DRs on, and started pulling in 3rd (not a lot of places around me to really ring-him-out space-wise; and a lot of patrols around me). That made such a big difference. I was worried about the TMA for shifts, but I found once I got most everything in-line, that the shifts worked-out just fine. Good suggestion. It's easy to forget some of the simpler stuff sometimes
