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L99 bolt on hp dyno sheet

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Old Aug 23, 2020 | 10:43 AM
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Default L99 bolt on hp dyno sheet

L99 bolt ons long tubes cai borla exhaust only 400rwhp 426rwtq sound high dont no if its had ls3 convert? Only seeing l99 full bolt ons make 380hp 390 tq

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Old Aug 28, 2020 | 08:36 AM
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Seems a little high to me for an automatic car. What correction factor was used?
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Old Aug 28, 2020 | 08:38 AM
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Originally Posted by zzracer
Seems a little high to me for an automatic car. What correction factor was used?
sae smoothing 5
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Old Aug 28, 2020 | 08:44 AM
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I don't know then ,I haven'tseen any personaly that high except ls3 manual cars.
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Old Sep 3, 2020 | 01:05 PM
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Those motors stock show around 490 hp on an engine dyno. So, a little over 400 on a chassis dyno seems right in the ball park. You can Figure about 100hp loss through an A/T drivetrain.
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Old Sep 4, 2020 | 08:55 AM
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Originally Posted by 64post
Those motors stock show around 490 hp on an engine dyno. So, a little over 400 on a chassis dyno seems right in the ball park. You can Figure about 100hp loss through an A/T drivetrain.
L99's stock make around 400hp on engine dyno
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Old Sep 4, 2020 | 03:13 PM
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On my Dynojet they make around 327 rwhp with a tune. You can't really put much timing in them with the factory cats on.
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Old Sep 4, 2020 | 09:02 PM
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Originally Posted by minytrker
L99's stock make around 400hp on engine dyno
No. watch Richard Holdeners speed secrets, he dynos LS3s all the time, stock and crammed. Just under 500 for LS3 with long tubes and Holley tune.
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Old Sep 10, 2020 | 04:23 PM
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Originally Posted by 64post
No. watch Richard Holdeners speed secrets, he dynos LS3s all the time, stock and crammed. Just under 500 for LS3 with long tubes and Holley tune.
A stock L99 will not make 500 on an engine dyno. They make around 330-340 in a camaro on a chassis dyno. A cammed LS3 can easily make 500 on an engine dyno. Big difference between stock L99 and a cammed LS3. I am doing these myself on my chassis dyno and on my engine builders engine dyno.
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Old Sep 19, 2020 | 09:58 AM
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Originally Posted by minytrker
A stock L99 will not make 500 on an engine dyno. They make around 330-340 in a camaro on a chassis dyno. A cammed LS3 can easily make 500 on an engine dyno. Big difference between stock L99 and a cammed LS3. I am doing these myself on my chassis dyno and on my engine builders engine dyno.
Maybe yours make that number, I’ve seen 490 on the Westech dyno, no aftermarket cam.
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Old Sep 19, 2020 | 10:16 AM
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Originally Posted by 64post
Maybe yours make that number, I’ve seen 490 on the Westech dyno, no aftermarket cam.
No aftermarket cam, but any other nonstock parts? Or a way better tune? I don't see a bone stock LS3 doing near 500HP
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Old Sep 19, 2020 | 11:36 AM
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Originally Posted by G Atsma
No aftermarket cam, but any other nonstock parts? Or a way better tune? I don't see a bone stock LS3 doing near 500HP
Longtube headers and tuned with Holley HP by the host/producer. A non 525 hp LS3 crate engine from Gander Chevrolet. I see, because you’ve not seen it, it must not exist? It’s 495hp and 490 ftlbs Oh, I left out the electric water pump, that must be it.....
Find Richard Holdners Speed secrets vid on 500hp builds and skip to the 9 min mark, maybe I’m missing something?

Last edited by 64post; Sep 19, 2020 at 12:04 PM.
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Old Sep 19, 2020 | 12:09 PM
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Originally Posted by 64post
Long tube headers and tuned with Holley HP by the host/producer. A non 525 hp LS3 crate engine from Gander Chevrolet. I see, because you’ve not seen it, it must not exist?
Not saying that at all, smartass! I said a TOTALLY STOCK LS3 does not make that kind of power WITHOUT a better tune (Holley HP), or WITHOUT non stock parts (headers), besides a cam.
I usually respect and appreciate your posts here due to you actually being a builder. But once in a while you get your head in your *** and say $hit like the above. You are a legend in your own mind....

Last edited by G Atsma; Sep 23, 2020 at 09:59 AM.
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Old Sep 19, 2020 | 03:27 PM
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Well, in post #8 I did say Holley tune and long tubes and you continued to question it like you’re the master of all things LS. Sorry, no harm, just saying it’s possible in the right hands even if it’s not yours or Minytrker’s. I did leave out the electric water pump but that not worth that much. Oh yeah, I base my assertions pretty much on experience or from credible people, you?
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Old Sep 19, 2020 | 06:49 PM
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I already gave credit where due.....
I've seen LOTS of dyno tests, Holdener or otherwise. A good database from which to gain what knowledge I have. I don't need to build engines to do that....
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Old Sep 22, 2020 | 10:23 AM
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“ I don’t need to build engines to do that” Experience might actually give you some validity, med students work in the hospital for years, tradesmen work in the field for years, neither meet their goal without it, just sayin.
.
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Old Sep 22, 2020 | 11:52 AM
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Originally Posted by 64post
“ I don’t need to build engines to do that” Experience might actually give you some validity, med students work in the hospital for years, tradesmen work in the field for years, neither meet their goal without it, just sayin.
.
I have HELPED assemble/disassemble engines, similar to med students/tradesmen, but will take no credit for that not totally completed myself.
I know every nut and bolt in an engine, and could assemble one out of a tableful of parts and a torque spec sheet.
I still stand on my above statement that one need not be a builder to know how to read/interpret a dyno chart. Just statistics in graph form.
BTW, this thread started out being about the L99, then drifted into the LS3, a very different engine with different cams and compression ratios, plus AFM/DOD and VVT on the L99. Discussion of one has few parallels with the other, performance-wise. The L99 has far more in common with all the 6.2L truck engines, including the cam.

Last edited by G Atsma; Sep 22, 2020 at 12:02 PM.
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Old Sep 22, 2020 | 03:39 PM
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Originally Posted by 64post
Longtube headers and tuned with Holley HP by the host/producer. A non 525 hp LS3 crate engine from Gander Chevrolet. I see, because you’ve not seen it, it must not exist? It’s 495hp and 490 ftlbs Oh, I left out the electric water pump, that must be it.....
Find Richard Holdners Speed secrets vid on 500hp builds and skip to the 9 min mark, maybe I’m missing something?
I think you missed the LS3 and not L99 part. Plus

LS3 with HEADERS, ELECTRIC WATER PUMP, NO ACCESSORIES & TUNE...NOT A STOCK L99

Originally Posted by 64post
Well, in post #8 I did say Holley tune and long tubes and you continued to question it like you’re the master of all things LS. Sorry, no harm, just saying it’s possible in the right hands even if it’s not yours or Minytrker’s. I did leave out the electric water pump but that not worth that much. Oh yeah, I base my assertions pretty much on experience or from credible people, you?
Im basing this on first hand real world me doing this in person not off YouTube. I have thousands of hours on chassis dyno's over the last twenty years (even have one at my house) and have hundreds of hours on engine dyno's. So once again a stock L99 will NOT make 500hp on an engine dyno. A stock LS3 (430hp) can make close to 500hp with headers, electric water pump, no accessories and a tune like in the video BUT thats not what I have been saying isnt correct. If you take a LS3 crate motor and run it on engine dyno with accessories on it and manifolds it will closer to the 430 area.
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Old Sep 22, 2020 | 10:31 PM
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L99 is a 5th gen Camaro and Chevrolet SS motor with active fuel management, not sure if it was ever a truck motor, but maybe.
GAtsma you did say “ I don’t see a bone stock LS3 making near 500” in box #11. So you could have made a distinction right there, you kinda doubled down saying that about an LS3..... Just because you pushed a broom around the shop, held the light for a mechanic and learned the names of parts does not make you qualified for anything, really

minitryker, you stated an LS3 with a cam could make 500, that’s common knowledge, I contend they don’t need a cam replacement to do it, and they don’t 495/490 is pretty close. I never mentioned L99, I said LS3 way back there. Yes, I’ll I agree that you did say L99 back there, so I was a little off topic but correct.
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Old Sep 23, 2020 | 09:57 AM
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Originally Posted by 64post
L99 is a 5th gen Camaro and Chevrolet SS motor with active fuel management, not sure if it was ever a truck motor, but maybe.
GAtsma you did say “ I don’t see a bone stock LS3 making near 500” in box #11. So you could have made a distinction right there, you kinda doubled down saying that about an LS3..... Just because you pushed a broom around the shop, held the light for a mechanic and learned the names of parts does not make you qualified for anything, really
The L99 and L92/L94 truck engines are VERY close in just about every spec.
And there ya go being a dick again. Have I ever built a whole engine by my lonesome? Nope. Does not mean I haven't done most of the major clearance checking and assembly steps while helping build an engine. I have just never been in a position where I need to build numerous engines.
If you do that for a living, fine. Either that or yours don't live and require repeated RE-building. Practice makes perfect, after a while. Or supposed to... LOL
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