[FoundNemo]

Originally Posted by radz28

Excellent progress

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.

[Camaro1973]

Originally Posted by FoundNemo

Here is the pull in 3rd at WOT. Zero knock now with the Cyl #1 static retard zero'd out. No more rev limiter hits with it bumped up 100rpms for max now too.

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.

[KingLT1]

Should be making a pull in at least 5th with a A10. Not enough load on the engine in the lower gears.

[radz28]

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.

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.

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.

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

[FoundNemo]

Originally Posted by KingLT1

Should be making a pull in at least 5th with a A10. Not enough load on the engine in the lower gears.

Will do next to check.

[FoundNemo]

Originally Posted by radz28

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.



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

The pipes clear the engine mounts and stuff better than Kooks which can vibrate against engine mounts causing false knock.

[Camaro1973]

Originally Posted by KingLT1

Should be making a pull in at least 5th with a A10. Not enough load on the engine in the lower gears.

Sure you can. An incline, it’s better then telling him to go WOT in at least 5th on the street. 5th is a buck twenty

It’s not perfect by any means but it’s the best data without a dyno.

[radz28]

Originally Posted by FoundNemo

The pipes clear the engine mounts and stuff better than Kooks which can vibrate against engine mounts causing false knock.

OH. I hadn't learned it was more fitment than anything. That makes sense then. No wonder.

Originally Posted by Camaro1973

Sure you can. An incline, it’s better then telling him to go WOT in at least 5th on the street. 5th is a buck twenty

It’s not perfect by any means but it’s the best data without a dyno.

Yeah - Not around these parts, LOL.

[KingLT1]

Originally Posted by Camaro1973

Sure you can. An incline, it’s better then telling him to go WOT in at least 5th on the street. 5th is a buck twenty

It’s not perfect by any means but it’s the best data without a dyno.

Where in my post did I say to go 120 on the street?

[Camaro1973]

Originally Posted by KingLT1

Where in my post did I say to go 120 on the street?

"Should be making a pull in at least 5th with a A10. Not enough load on the engine in the lower gears."


Hes not on a dyno.

[KingLT1]

I was thinking the track or air strip. I am not opposed to making a street pull either if you have a good spot. I realize that some don't. I'll leave that up for Nemo to figure out.

[FoundNemo]

Originally Posted by KingLT1

I was thinking the track or air strip. I am not opposed to making a street pull either if you have a good spot. I realize that some don't. I'll leave that up for Nemo to figure out.

No room locally for that kind of speed comfortably or safely. Will use a steep hill to work it harder.

[radz28]

He's got a point though. The longer you can stay in the cells (under steady state), the better the data is. That's all he's trying to say. I've actually used lower gears and modulated my brakes to try to do something similar. Typically - I make 4-5 hits and just make sure I'm using cells where I get a minimum of 20-25 hits. If you watch how the cells change, at idle, for example, you'll see they move around until the ECM finds it's happy place.

[KingLT1]

Originally Posted by radz28

He's got a point though. The longer you can stay in the cells (under steady state), the better the data is. That's all he's trying to say. I've actually used lower gears and modulated my brakes to try to do something similar. Typically - I make 4-5 hits and just make sure I'm using cells where I get a minimum of 20-25 hits. If you watch how the cells change, at idle, for example, you'll see they move around until the ECM finds it's happy place.