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Old 07-20-2020, 10:29 PM   #29
CW3SF

 
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Have your tuner flip the program to SAE and reprint it so we can see what it makes with normal numbers.
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Old 07-21-2020, 08:18 PM   #30
te-44
 
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Pretty impressive numbers considering the engine is only rated at 650hp flywheel and it looks like your car only losses 10% thru the driveline!

My stock 18 zl1 a10 put down 532 which is spot on with 18% driveline loss for an automatic where manuals lose 15%
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Old 07-21-2020, 08:20 PM   #31
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Quote:
Originally Posted by CW3SF View Post
Have your tuner flip the program to SAE and reprint it so we can see what it makes with normal numbers.
Exactly
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Old 07-21-2020, 10:21 PM   #32
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Originally Posted by NW Sam View Post
What part of Wa. are you located?

I'm in the Everett area.
I'm in chehalis

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Old 07-21-2020, 10:51 PM   #33
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don't really care if its STD or SAE, my guess is it's a base line number for him if he decides to mod the car. What surprised me is not a big difference between exhaust open or closed. Expected a much bigger loss with the exhaust closed.
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Old 07-22-2020, 09:11 AM   #34
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Originally Posted by Stoner View Post
don't really care if its STD or SAE, my guess is it's a base line number for him if he decides to mod the car. What surprised me is not a big difference between exhaust open or closed. Expected a much bigger loss with the exhaust closed.
Exactly how I feel!! The exhaust also amazed me.

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Old 07-22-2020, 12:16 PM   #35
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Quote:
Originally Posted by te-44 View Post
My stock 18 zl1 a10 put down 532 which is spot on with 18% driveline loss for an automatic where manuals lose 15%
That's on the low side, mean seems to be 540-560

Someone put a green filter on an re-run it
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Old 07-23-2020, 06:08 PM   #36
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Originally Posted by Plasar View Post
No such thing as too high octane. Too low = detonation/pinging risk.
And timing being pulled back = less power
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Old 07-23-2020, 06:15 PM   #37
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Originally Posted by wnta1ss View Post
At the bottom of the sheet you can see CF: STD 1.03
I understand the diff between SAE and STD programs on the chassis dyno set ups, but waht does the 1.03 mean? is that a correction factor? meaning if you take the dyno hp # of 582 and - the 1.03 factor = 576?
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Old 07-23-2020, 06:41 PM   #38
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Originally Posted by lt4camaro View Post
I understand the diff between SAE and STD programs on the chassis dyno set ups, but waht does the 1.03 mean? is that a correction factor? meaning if you take the dyno hp # of 582 and - the 1.03 factor = 576?
Yes 1.03 was the correction factor that was applied, meaning that the uncorrected reading was about 565.
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Old 07-23-2020, 06:47 PM   #39
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Originally Posted by wnta1ss View Post
Yes 1.03 was the correction factor that was applied, meaning that the uncorrected reading was about 565.
Can you show me the math equasion that shows that please. Never mind i got it, 572 -1.03% correction factor = 566. Now 566 rwhp + 15 % drivetrain loss = 650 crank hp. Right at the factory SAE rating of 650.
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Old 07-23-2020, 06:57 PM   #40
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Actually MS109 burns slower then the 93 so it helped that you had some 93 in it already. It may have put down the same or less on just MS109. Gm doesn't put a lot of timing in that you'd need to make a lot more hp. I used to run 26 degrees running 109 and you can't do that with 93 and GM probably only has about 16 to 17 degrees stock, maybe a little more. So to much octane won't usually help a stock engine with stock timing.
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Old 07-23-2020, 07:08 PM   #41
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Originally Posted by laynlo15 View Post
Actually MS109 burns slower then the 93 so it helped that you had some 93 in it already. It may have put down the same or less on just MS109. Gm doesn't put a lot of timing in that you'd need to make a lot more hp. I used to run 26 degrees running 109 and you can't do that with 93 and GM probably only has about 16 to 17 degrees stock, maybe a little more. So to much octane won't usually help a stock engine with stock timing.
What the higher octane does do though is it allows the ECU to stay on the highest timing degrees in the table because it will never see knock and retard the spark. The slightest knock detected on a hot day at wot will knock back timing and horsepower drops also. Higher octane doesnt really increase horsepower as much as it allows a no horsepower loss situation, A preventative measure if you will especially while making WOT 1/4 mile passes or WOT pulls next to your buddy.
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Old 07-23-2020, 07:37 PM   #42
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Quote:
Originally Posted by lt4camaro View Post
Can you show me the math equasion that shows that please. Never mind i got it, 572 -1.03% correction factor = 566. Now 566 rwhp + 15 % drivetrain loss = 650 crank hp. Right at the factory SAE rating of 650.
Your math is a little off. 566 is too high for 15% drivetrain loss. Since 566/0.85 = 666, roughly. We can check this, since 650 * 0.15 = 552.5.
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