10-15-2020, 12:00 PM | #29 |
Drives: 17 SS a8 Join Date: Feb 2010
Location: omaha
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https://www.tfxengine.com/SuperchargedEngineData.html
I am not familiar with all the options but that page makes it look pretty cool.
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dropped a valve in the 6.2. now running a drop in rods and piston 5.3
best et 5.83@121 with the 5.3 http://www.camaro6.com/forums/showthread.php?t=465472 |
10-15-2020, 12:19 PM | #30 | |
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Ignition advance & exhaust pressure all correlate to pumping losses. Inevitably there will be a sweet spot relating to charge density. |
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10-15-2020, 01:26 PM | #31 | |
Drives: 17 SS a8 Join Date: Feb 2010
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In my case I have a lot of turbo available, I have a lot of fuel system available, I don’t care about efficiency or emissions. My only concern is what gets me the most power before reaching the limit of a given set of parts. To me this type of stuff is the fun part. I enjoy building and learning and sharing more than the actual car once it is running.
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dropped a valve in the 6.2. now running a drop in rods and piston 5.3
best et 5.83@121 with the 5.3 http://www.camaro6.com/forums/showthread.php?t=465472 |
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10-15-2020, 02:12 PM | #32 | |
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Stroke & rod/ ratio determine piston acceleration & deceleration at a given RPM. There’s a metric ton that goes into it that, quite frankly, is limitedly controllable. The reality is quite start when you realize matching flame propagation rates to piston acceleration rates where real energy conversion occurrs is well north of 15k RPM. Energy conversion is a fickle beast, & that’s what you are after. Most energy output at a given energy content in the chamber. As I’m sure you know though, 3kpsi of cylinder pressure at TDC is not the same thing as 3Kpsi at 20ATDC in simple terms of present volume. Oh, & TFX has been around quite a while. Good stuff. |
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10-15-2020, 02:49 PM | #33 |
Drives: 17 SS a8 Join Date: Feb 2010
Location: omaha
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“Most energy output at a given energy content in the chamber. “
I am not looking for this. Unless this is what also results in my actual goal. What is the limiting factor on the motor I am building? Cylinder head sealing? The block? The rods? The pistons? The crank? The mains? If it is cylinder head sealing or the pistons/rods I think setting a hard limit on cylinder pressure and tuning for max power while staying under that limit might result in a motor that makes a large amount of power and stays alive. Currently my timing is in the 16-20deg range depending on rpm and that is backed up by the dyno and what most other people seem to run. I see nice gains going from 16-18 and much smaller gains above that. What should that timing look like at 30psi? How about 40psi? Just using the add timing as long as there are good gains might not put you at the same spot at looking at cylinder pressure and keeping it under a certain number.
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dropped a valve in the 6.2. now running a drop in rods and piston 5.3
best et 5.83@121 with the 5.3 http://www.camaro6.com/forums/showthread.php?t=465472 |
10-15-2020, 03:25 PM | #34 | |
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Others are much more experienced in knowing where your practical limit is with that engine than I, but I’d say “all of that” LOL. There’s going to be a point where “optimal” timing isn’t going to be the main focus. It’s going to be what point in the whole combination (fueling, injector timing, ignition timing, charge density, chamber pressure curve, valve curtain, etc) you 1: reach a power point you are happy with or 2: it goes boom. You already knew that I’m sure. I’m just excited to see where you end up. |
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10-15-2020, 03:54 PM | #35 | |
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Drives: 14GMC 2.9 16GMC Turbos 2020Silv.6.2 Join Date: Mar 2020
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10-15-2020, 04:07 PM | #36 | |
Drives: 17 SS a8 Join Date: Feb 2010
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Your saying you have ran mid 9’s at 4700lbs. How fast? What kind of 60’? How much boost? Just 11deg huh? Is that typical for the sbe crowd? I would like more info on this type of stuff.
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dropped a valve in the 6.2. now running a drop in rods and piston 5.3
best et 5.83@121 with the 5.3 http://www.camaro6.com/forums/showthread.php?t=465472 |
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10-16-2020, 09:48 AM | #37 | |
Old badass
Drives: 14GMC 2.9 16GMC Turbos 2020Silv.6.2 Join Date: Mar 2020
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10-17-2020, 12:11 AM | #38 |
Drives: 17 SS a8 Join Date: Feb 2010
Location: omaha
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Hmm. Pretty happy with that et. This is the last trip to the track before it gets upgraded.
100% stock 5.3 with dod, vvt, stock springs. 13.5psi, 4000rpm launch at 8psi. 5900rpm shift points.
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dropped a valve in the 6.2. now running a drop in rods and piston 5.3
best et 5.83@121 with the 5.3 http://www.camaro6.com/forums/showthread.php?t=465472 |
10-17-2020, 06:51 AM | #39 |
Drives: 2022 Lt1 A10 Join Date: Nov 2015
Location: clark, mo
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That is a great pass for what little you have done and a pretty much bone stock 5.3. Congrats. Thats a high 9 second quarter.
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2022 Lt1 6.2 A10, Maggie 2300, THPSI Port Inj/10 rib, Rotofab, E, Nickey, SCOL, Griptech, RC Bandits, Hoosiers/MT 9.80@142.96 1.44 60ft, 6.34@112 707/669 RWHP/TRQ. 16SS Maggie 2650 9.41@147 1.35 60ft, 5.99@119. 16 C7 A8 10.90@128 Bolt on stuff
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10-17-2020, 07:09 AM | #40 | |
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What were doing for a cam? Add: I’d love to see the card. Last edited by gtfoxy; 10-17-2020 at 08:26 AM. |
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10-17-2020, 07:57 AM | #41 |
Drives: 2016 1SS NFG A8 Join Date: Aug 2017
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Nice pass!
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2016 NFG 1SS A8
Options-2SS Leather/NPP Perf. mods-Whipple 2.9/Fuel System/Flex Fuel/103mm TB/Rotofab Big Gulp/Cat Deletes/Corsa NPP Per. times- 10.5 @ 137 w/ 1.8 60ft Full weight on 20's 1200DA |
10-17-2020, 09:09 AM | #42 |
Drives: 17 SS a8 Join Date: Feb 2010
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Here is a little data. I need to recheck my exhaust pressure sensor. Seems to good to be true.
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dropped a valve in the 6.2. now running a drop in rods and piston 5.3
best et 5.83@121 with the 5.3 http://www.camaro6.com/forums/showthread.php?t=465472 |
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