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Camaro V6 LFX Engine, Exhaust, and Bolt-Ons For all LFX related parts

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Old 03-21-2012, 07:26 PM   #1
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My Dyno Run Today 2012 LFX

First off my first time getting any vehicle dyno'd so it was a cool experience. Secondly I have some issues with GM now. These numbers are still circumstantial as my governor/ speed limiter kicked in at 119 6.5K RPMs . Most I ever did on the street was 115 so a tune is definitely in order now.

Secondly my Air to Fuel Ratio was reading almost 15:1 Im guessing its like this factory for gas mileage purposes . But to my understanding to Lean or to Rich of a mixture causes poor engine performance. Im no expert thats why Im here to learn. Anyway here are the numbers

I couldnt get a full reading because the car wouldnt go to 7k rpm so I dont know how valid this is. But at 6.5k rpms I'm at roughly 255rwhp. So factor in the limiter and A/F ratio being so lean (back that down to 11 or 12:1) could that bump me up about 15 hp?

What do yall think of these numbers?


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Old 03-21-2012, 07:29 PM   #2
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Oh ya...the limiter is set to 118 on cars without the pirelli tires for safety reasons, since the tires on the non-RS and non-SS cars aren't rated for higher speeds.
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Old 03-21-2012, 07:31 PM   #3
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Oh ya...the limiter is set to 118 on cars without the pirelli tires for safety reasons, since the tires on the non-RS and non-SS cars aren't rated for higher speeds.
Ahhhhh That makes sense I should have gotten the 2Lt then if I would have known I planned on getting a tune later down the road but I gotta bump that up on the list.
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Old 03-21-2012, 07:52 PM   #4
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Being NA you want to be around 12.8.1 - 13.0.1 going WOT, good numbers though running that lean WOT, I would get that tune checked
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Old 03-21-2012, 07:57 PM   #5
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That's the second dyno run we've seen where the run is extremely lean.
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Old 03-21-2012, 08:07 PM   #6
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About the speed limiter, I wouldn't do the tune just for that. I'm an LS too and I haven't gone over the 118 except for twice at my friends ranch that has a massive straight away. I just wanted the limiter off cuz im OCD like that lol. But the tune is totally worth it if your an automatic. If your a manual, I would wait until you at least get headers
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Old 03-21-2012, 08:37 PM   #7
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you automatic or manual? either way pretty good numbers for stock.
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Old 03-21-2012, 08:40 PM   #8
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you automatic or manual? either way pretty good numbers for stock.
Its Automatic and that A/F ratio had me a bit worried but Im guessing it came off the assembly line like that on purpose.
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Old 03-21-2012, 08:45 PM   #9
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thats even better of numbers since your auto
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Old 03-21-2012, 09:18 PM   #10
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Just remember that you have LFX so in actuallity you should be making more. 255 is LLT stock auto number. I don't know if mo told you but their 248x read a little lower as you can see from today's dyno. Try to STD and SAE your run from uncorrected file and see what you come out with.

You got the most important part out the way so you should be good with your future mods
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Old 03-21-2012, 09:27 PM   #11
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you will have to do your pull's in 3rd gear.
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Old 03-21-2012, 10:31 PM   #12
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Wow, actually I'd be very pleased with those numbers if I were you. Seems almost spot on.

I believe the automatic has at least a 20% drivetrain loss from the countless dynos I've pondered over the past few years. With your stock rated numbers, that comes to 258rwhp and 222rwtq, which is almost exactly what you ended up with.

What was the temps today?

Jay, so is this the dyno you've been using so far? Didn't some of your earlier dynos turn out as low or lower than this number? (which I'm not sure how that could have happened lol). Maybe this dyno isn't quite as low reading as we think??? Very interesting for sure.

Hopefully you can get on that other dyno you've mentioned sometime soon and see whats up. Man, I feel bad for asking you to do all of this dyno time! lol Gotta be costly.
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Old 03-21-2012, 11:13 PM   #13
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Wow, actually I'd be very pleased with those numbers if I were you. Seems almost spot on.

I believe the automatic has at least a 20% drivetrain loss from the countless dynos I've pondered over the past few years. With your stock rated numbers, that comes to 258rwhp and 222rwtq, which is almost exactly what you ended up with.

What was the temps today?

Jay, so is this the dyno you've been using so far? Didn't some of your earlier dynos turn out as low or lower than this number? (which I'm not sure how that could have happened lol). Maybe this dyno isn't quite as low reading as we think??? Very interesting for sure.

Hopefully you can get on that other dyno you've mentioned sometime soon and see whats up. Man, I feel bad for asking you to do all of this dyno time! lol Gotta be costly.
Yea I will be hitting up T&T with him to get my tune work done by Tim. I was lookin at maybe 260-265 if I rich up the afr. What all gets changed from a trifecta tune? Timin, fuel mixture , speed limiter?

I think they ran those pulls in 4th but i think they did one in 3rd too.

oh edit: The Temp today was 70-72 at around 5-530pm when we did the pulls

Last edited by Abstrak; 03-21-2012 at 11:24 PM.
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Old 03-21-2012, 11:51 PM   #14
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coop,

who actually did the pulls in your car bro..??

I just checked out the run files and the gearing show 57-88. It look like they pulled in 2nd and 3rd gear probably trying to figure out what was going on with the rev limiter. Run 5, 4, and 1 was done in gearing ratio of 87 and the rest in 57.

Preng, our dyno definitely read low. There's no doubt about that. His highest torque is 216, and his highest hp is 249. LFX on a correct reading dyno should have pulled around 260 with ASE correction. When comparing dyno numbers you have to read it with the same correction factor as others, in this case it would be ASE correction since most other peoples stock dyno numbers seem to have SAE correction factors. The first line is my very first dyno there on the same exact dyno around the same time too when I had the obx long tube and tune only.

Coop, we definitely have to go see tim. Let me know when you trying to do that. I'm trying to go within the next 2-3 weeks.
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Old 03-22-2012, 12:17 AM   #15
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coop,

who actually did the pulls in your car bro..??

I just checked out the run files and the gearing show 57-88. It look like they pulled in 2nd and 3rd gear probably trying to figure out what was going on with the rev limiter. Run 5, 4, and 1 was done in gearing ratio of 87 and the rest in 57.

Preng, our dyno definitely read low. There's no doubt about that. His highest torque is 216, and his highest hp is 249. LFX on a correct reading dyno should have pulled around 260 with ASE correction. When comparing dyno numbers you have to read it with the same correction factor as others, in this case it would be ASE correction since most other peoples stock dyno numbers seem to have SAE correction factors. The first line is my very first dyno there on the same exact dyno around the same time too when I had the obx long tube and tune only.

Coop, we definitely have to go see tim. Let me know when you trying to do that. I'm trying to go within the next 2-3 weeks.
Ummm I think the guy doing it was Dennis but Mo was right there because they had to calibrate the machine because my rpms was idle at like 500 but it was showing like 200 on the monitor. I can go up Fredrick next weekend on the 31st if you down. I figured the rev limiter was hindering the numbers
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Old 03-22-2012, 02:14 AM   #16
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I would wait until you at least get headers
That is going to be one long wait.......
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Old 03-22-2012, 07:08 AM   #17
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That's the second dyno run we've seen where the run is extremely lean.
Assuming they are just using a tailpipe sniffer... wondering if their sensors just aren't working right... Because no way should it be that lean at WOT...
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Old 03-22-2012, 07:10 AM   #18
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you will have to do your pull's in 3rd gear.
agreed... we did pulls on mine in both 3rd and 4th gear... they were basically identical.. Only thing is 4th gear pulls just took longer! LOL
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Old 03-22-2012, 08:21 AM   #19
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Assuming they are just using a tailpipe sniffer... wondering if their sensors just aren't working right... Because no way should it be that lean at WOT...
I'll definitely know sometime this spring/summer. We always have a dyno day through my website and I'll be dyno'ing my 5th gen. Unfortunately they always used tailpipe sniffers.
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Old 03-22-2012, 10:08 AM   #20
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I know when I talk to Vince before about the LFX he did say that they run leaner than the LLT, now I don't know if it run that much leaner up in the 13's and14's on wot but that does look waaay too lean. What's crazy is that this is the same dyno shop that I been dealing with for a loooong time and their Sniffer always been on point compared to my wideband, sometimes the sniffers tend to read a little leaner but not by alot.

I have no idea what happened there yesterday coop since I was not there but it look like somebody was trying to setup the dyno rather than actually making runs. The gearing ratio 57 is around 4th gear and 87 is 2nd gear. So it look like they first tried in 2nd gear which explain the low torque number, than did 4th gear then went back to 2nd gear. Doesn't look like they used 3rd gear at all. Another thing I realized is that all of the run was done pass 4k rpm. The pulls should have started at 2k rpm.

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Old 03-22-2012, 11:12 AM   #21
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I know when I talk to Vince before about the LFX he did say that they run leaner than the LLT, now I don't know if it run that much leaner up in the 13's and14's on wot but that does look waaay too lean. What's crazy is that this is the same dyno shop that I been dealing with for a loooong time and their Sniffer always been on point compared to my wideband, sometimes the sniffers tend to read a little leaner but not by alot.

I have no idea what happened there yesterday coop since I was not there but it look like somebody was trying to setup the dyno rather than actually making runs. The gearing ratio 57 is around 4th gear and 87 is 2nd gear. So it look like they first tried in 2nd gear which explain the low torque number, than did 4th gear then went back to 2nd gear. Doesn't look like they used 3rd gear at all. Another thing I realized is that all of the run was done pass 4k rpm. The pulls should have started at 2k rpm.

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Hmmmm you might have to get Mo to do another run for me then cause I swore they pulled it in 3rd and I had no idea he was starting the pulls that high either. I was non the wiser or i would have told him to pull it at 2k in 3rd.
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Old 03-22-2012, 12:30 PM   #22
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The 2nd video looks like the AFR was around 13.5/13.8 when they got into the pull, above 5000rpm
There was a few seconds of delay before the PE kicked in, so if they are using tailpipe sniffer it may be reading .5 higher that what the wide band would see before the cats.
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Old 03-22-2012, 12:55 PM   #23
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I'm going to see what I can do for you bro.. I first want to talk to mo and see what happened there yesterday. I had a chance to look at the run files a little more closely just now and the graph definitely look wacked out and their sniffer was bad, some pulls show a value of straight 10, but.... that does not mean you still didn't get the correct hp/tq results. Just look at tracy's dyno for the ice olator, almost the same crazy looking graph, but not only that, most auto box dynos tends to come out with a crazy looking graph if not done properly.

This is what I think it happened. First of all, It look like they was trying to find the right gearing so it won't get caught by the speed limiter. That explain the 2nd gear pulls. The only camaro they are familiar with is mine but I have a manual which is done in 4th gear, that explain the 4th gear pull. It's also ok to pull the auto in 4th but only if you have the speed limiter removed and if it doesn't affect the rpm signal in the high rpm. The difference in hp/tq is minimal, the lower in gear you go the higher the hp but lower the torque and vice versa. For your car, all of the pulls should of have been done in 3rd starting around 2k rpm. It definitely look like dennis didn't know WTH he was doing.

Regardless of what happened or how the dyno was performed, you was able to still get your peak hp numbers so it was not all bad. The correct result for yesterday's highest is 249hp and 219tq. Once again, this definitely prove that mo's dyno read on the "low" side. Your LFX should make around 260hp+ on a correctly reading dyno with correction factor put in, but like I told you before, a dyno is only a tool to measure mod to mod, not to measure how much exactly your car is putting down to the rear.

PM me and we can set something up for TnT. Maybe we can gather up some mid atlantic V6 guys and have a dyno day
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Old 03-22-2012, 04:13 PM   #24
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You got to explain the correction and smoothing to me as I dont understand that at all lol. And I dont see how those numbers would be peak if it bottomed out at 6.5k rpms wouldnt it be higher if the engine was still able to put out power minus the rev limiter?
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Old 03-22-2012, 06:47 PM   #25
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I like my LFX and the mileage I get.

If I want performance, I'll drive my 2SS/RS.
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