Boost, KR and Torco results....
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Boost, KR and Torco results.... Thought I would share some testing results with the community...
I have been logging KR in 3rd and 4th gear at WOT, as bad as 4.9 degrees. I see it at 5000ish rpms with a g/cyl load of 1.00+. I am running 17 degrees of advance at the above levels.
I am showing 8 pounds of boost by 5000 rpms, 9 pounds at 5500rpms, 10+ over 6000rpms. (scary stuff)
I bought a case of Torco to see if the KR I was logging was false or real detonation. I tried 1 can and still logged the same KR as before. I then added a second can, which supposedly brings a 20 gallon tank of 93 octane to 114 octane. This stopped almost all the KR except at the top of 4th gear.
Since I now know this was real KR I will be getting a larger SC pulley to cut some boost!!!
Below are my findings. Note the spreadsheet "tab" names define the information contained. I am including my current A/F ratios and High Octane Spark Table also.
http://shamrockx.home.comcast.net/torco-test.xls
I have been logging KR in 3rd and 4th gear at WOT, as bad as 4.9 degrees. I see it at 5000ish rpms with a g/cyl load of 1.00+. I am running 17 degrees of advance at the above levels.
I am showing 8 pounds of boost by 5000 rpms, 9 pounds at 5500rpms, 10+ over 6000rpms. (scary stuff)
I bought a case of Torco to see if the KR I was logging was false or real detonation. I tried 1 can and still logged the same KR as before. I then added a second can, which supposedly brings a 20 gallon tank of 93 octane to 114 octane. This stopped almost all the KR except at the top of 4th gear.
Since I now know this was real KR I will be getting a larger SC pulley to cut some boost!!!
Below are my findings. Note the spreadsheet "tab" names define the information contained. I am including my current A/F ratios and High Octane Spark Table also.
http://shamrockx.home.comcast.net/torco-test.xls
We use torco in my buddies GTP with a ported blower and all bolt ons. I have seen it take away as much as 3.5 degrees of knock my self. Stuff works good and this was only with one bottle and a 1/4 tank of gas.
Glenn
Glenn
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Originally Posted by Chris ARE 360
what is your AF on the dyno? what compression?
I have a DynoJet Wideband Commander so I pull my own A/F ratios on the street without a dyno, they are on the 3rd tab in the spreadsheet "A-F Ratios". My sig list my mods... stock compression....
Any ideas
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Originally Posted by SSnakekiller
What are your IAT's? Yeah are you running with stock compression?
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From: Salt Lake City, Utah
Originally Posted by SideStep
Hey Chris,
I have a DynoJet Wideband Commander so I pull my own A/F ratios on the street without a dyno, they are on the 3rd tab in the spreadsheet "A-F Ratios". My sig list my mods... stock compression....
Any ideas
I have a DynoJet Wideband Commander so I pull my own A/F ratios on the street without a dyno, they are on the 3rd tab in the spreadsheet "A-F Ratios". My sig list my mods... stock compression....
Any ideas
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Originally Posted by Slowhawk
I'm with both of them 
I understand no LS1 performs exactly like another but I thought my tuning was conservative, safe.Any ideas on what will loose the least HP, lower-timing or richer A/F???
Thanks,
Try taking a little timing out in the 4800 range and adding a little fuel there also. Do you have any kind of catch-can, oil in the intake is a killer. 10psi on a stock engine is about as far as I would go on pump gas around here. What diameter blower pulley are you running?
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Originally Posted by kp
Try taking a little timing out in the 4800 range and adding a little fuel there also. Do you have any kind of catch-can, oil in the intake is a killer. 10psi on a stock engine is about as far as I would go on pump gas around here. What diameter blower pulley are you running?
I have two catch cans, one on the PCV and the other coming off the front of the passenger valve cover. I using the 3.85 SC pulley. I got the system from Andy at A&A Corvettes. He uses a single intercooler and his own plumbing and brackets. Very clean install by they way....
The KR is happening only in 3rd and higher gears at 5000ish rpms (and up) with a g/cyl load of 1.0 and higher. I am running 17 degrees timing and an A/F of 11.9-12.0 to 1 in these ranges...
Any help would be appreciated... Hey I live about an hour from Knoxville. Help me tune this thing!!!
I have a head/cam D1 A&A car that I'll be fooling with soon on the dyno, its a nice setup. Your torque peak is a little higher with the blower. Honestly thats a lot of boost at 5000rpm and you may want to cut it down a bit or start running 100 unleaded in the heat.
If its your daily driver I would probably pulley it down a little, its going to work out the same way whether you pull timing/add fuel or drop the boost. I would try to keep the a/f ~11.5 or so from 44-5200. Dropping the boost will drop IATs a little and the blower will suck less horsepower since the blower isnt spinning as high.
Thats a lot of boost for that pulley combo for a P1, you are running the same impeller RPM as I am and I'm not seeing near that much with a stock motor/headers so its possible the cats might be melting down - they dont take 11:1 a/f blasts too many times. Had the car on a dyno yet?
If its your daily driver I would probably pulley it down a little, its going to work out the same way whether you pull timing/add fuel or drop the boost. I would try to keep the a/f ~11.5 or so from 44-5200. Dropping the boost will drop IATs a little and the blower will suck less horsepower since the blower isnt spinning as high.
Thats a lot of boost for that pulley combo for a P1, you are running the same impeller RPM as I am and I'm not seeing near that much with a stock motor/headers so its possible the cats might be melting down - they dont take 11:1 a/f blasts too many times. Had the car on a dyno yet?
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KP,
Yes it is a lot of boost, but that is the way it came. I am looking into getting a 4.10 pulley to cut 2.5 pounds. This is NOT ATI's system. It is a custom system that Andy at A&A Corvettes makes. He uses his own SC bracket, single intercooler and plumbing. Believe me the belt does NOT slip. I think that is where I am getting the high boost. Other Vette owners who bought this system are also showing 10 pounds at redline it is not just me...
Yes I have had it dynoed. It showed a best of 523rwhp and a low of 507rwhp, with different tunes. Both of these pulls logged KR. On the street it pulls like a beast!!! with no audible knock, but I can log KR still.
Yes it is a lot of boost, but that is the way it came. I am looking into getting a 4.10 pulley to cut 2.5 pounds. This is NOT ATI's system. It is a custom system that Andy at A&A Corvettes makes. He uses his own SC bracket, single intercooler and plumbing. Believe me the belt does NOT slip. I think that is where I am getting the high boost. Other Vette owners who bought this system are also showing 10 pounds at redline it is not just me...
Yes I have had it dynoed. It showed a best of 523rwhp and a low of 507rwhp, with different tunes. Both of these pulls logged KR. On the street it pulls like a beast!!! with no audible knock, but I can log KR still.
Originally Posted by kp
I have a head/cam D1 A&A car that I'll be fooling with soon on the dyno, its a nice setup. Your torque peak is a little higher with the blower. Honestly thats a lot of boost at 5000rpm and you may want to cut it down a bit or start running 100 unleaded in the heat.
If its your daily driver I would probably pulley it down a little, its going to work out the same way whether you pull timing/add fuel or drop the boost. I would try to keep the a/f ~11.5 or so from 44-5200. Dropping the boost will drop IATs a little and the blower will suck less horsepower since the blower isnt spinning as high.
Thats a lot of boost for that pulley combo for a P1, you are running the same impeller RPM as I am and I'm not seeing near that much with a stock motor/headers so its possible the cats might be melting down - they dont take 11:1 a/f blasts too many times. Had the car on a dyno yet?
If its your daily driver I would probably pulley it down a little, its going to work out the same way whether you pull timing/add fuel or drop the boost. I would try to keep the a/f ~11.5 or so from 44-5200. Dropping the boost will drop IATs a little and the blower will suck less horsepower since the blower isnt spinning as high.
Thats a lot of boost for that pulley combo for a P1, you are running the same impeller RPM as I am and I'm not seeing near that much with a stock motor/headers so its possible the cats might be melting down - they dont take 11:1 a/f blasts too many times. Had the car on a dyno yet?
I know what an A&A C5 kit is, I have worked on a couple of them and I am working with one right now on a h/c forged engine
Most likely its the intercooler/better air filter Andy uses, my belt doesnt slip either but I only see around 8psi @6200 depending on the outside temp and I pick up around 1psi with the cats on the car.
Depending what you are doing with the car dropping the boost is probably best if you drive it a lot. I am running 22-24 degrees of timing witn no KR problems at 11.5:1 on the street and I put it the a/f at 12:1 at the track and try to add some higher octane fuel. You are making good power and its a toss up between detuning and droppig boost, depends what you are looking to do.
Most likely its the intercooler/better air filter Andy uses, my belt doesnt slip either but I only see around 8psi @6200 depending on the outside temp and I pick up around 1psi with the cats on the car.
Depending what you are doing with the car dropping the boost is probably best if you drive it a lot. I am running 22-24 degrees of timing witn no KR problems at 11.5:1 on the street and I put it the a/f at 12:1 at the track and try to add some higher octane fuel. You are making good power and its a toss up between detuning and droppig boost, depends what you are looking to do.