*Official* L99 Dyno Thread

[mcdoogle6969]

Mods as follow:
2.8L Kenne bell
2x3" LT Cat-less ARH's
Borla ATAK axle-back

Here's the Dyno sheet.

[1 BAD RS 2 SS]

blue is with cats / red without cats .. all mods in sig

[Darth_Emma]

Here is my recent one from IPS Motorsports after my cam went in. This is with a maggie (3.6" pulley), headers, intake, torque converter and Livernois Stage 2B cam. This is on a loaded Mustang dyno.

552 RWHP and 509 torque with the exhaust cutouts open (Run 1). (Run 2 is with the cutouts closed.)

[vart]

Here's mine from a couple days ago. 350 rwhp, 354 tq. Mods in sig. No base run was done, but for comparison Davenport used an average of dozens of Camaros they have dyno'd (312.36 hp, 316.65 tq).

Can anyone explain SAE correction again for me? It is listed at 1.13. Does this mean that the 350 has already been corrected and therefore started at 310? or to compare apples to apples the 350 would be multiplied by 1.13 to come to 396? And whose apples are we comparing if this is taken into consideration?

Would the extra 38 hp worth of mods (exhaust, cai, headers, etc) equate to 47 at the crank (37/.8 for drivetrain loss)?

One more question- What does the "Smoothing:3" found in the top right corner mean?

[stangkilr]

Just did mine today:
OBX 1 7/8 headers no cats
GMPP off road axle back
airaid cai
custom tune
388rwhp/397tq

[Padre]

Just for the record, bolt-ons, TC and gears, as in my sig.
12.191 @ 112.89, 7.779 @ 88.66, 1. 653 (catback, CAI, 555R's, Shorties & Midpipes, 3200 TC, 3.45)

This was a couple of weeks ago in 98* heat, after a tune by John @ APF.

The car ran 12.1 @ 113 before this tune, just waiting on slightly cooler weather to hit the track again.



Padre

[stangkilr]

I went 12.70@112.3mph in 2800DA the other night with my factory 20's with factory tires. I really would like to run with a set of 18" dr's and a converter.

[Rockit_z28]

2010 SS L99 1,600 miles - 1 7/8 Kooks Cats Magnaflow Street Series, Roto-Fab, Dyno Tune = RWHP 341 Torque 354. I was expecting a little more.

[MR-02]

After reading through this thread tehre is so many combinations of mods,
so here is what Im thinking of adding , so does this sound accurate?

my L99 dyno's baseline 324 rwhp stock,

if I add flowmaster Catback exhaust it says to expect +15Hp
if I add Vararam Intake it says to expect +20Hp
If I add ported Throttle body it says to expect +7Hp
(are all of these HP gains crank or rear wheel?)

So after all that my L99 should dyno approx. 366 rwhp?

Is it that easy?

[Padre]

Originally Posted by MR-02

After reading through this thread tehre is so many combinations of mods,
so here is what Im thinking of adding , so does this sound accurate?

my L99 dyno's baseline 324 rwhp stock,

if I add flowmaster Catback exhaust it says to expect +15Hp
if I add Vararam Intake it says to expect +20Hp
If I add ported Throttle body it says to expect +7Hp
(are all of these HP gains crank or rear wheel?)

So after all that my L99 should dyno approx. 366 rwhp?

Is it that easy?

Most advertised gains are at the crank. Most advertised cat-backs are exaggerated as most tuners will tell you to expect only noise, not HP gains. The ported throttle body has been crank-HP tested to gain 3hp (maybe 2rwhp).

So, no, if you have dynoed 324, I would not expect 366 rwhp.

Headers will certainly get you well over 366. But if you don't want to go that route, I was very happy with the results of my high-flow catted midpipes install (JBA's) - expect a solid 20rwhp from that alone.

Padre

[litle88]

I would skip the ported T/B and save that money for headers. Without them I'd guesstimate 340-350 ish tuned on a dyno. I'd guess 380+ with headers. Padre is right.

[MR-02]

Hey, Thanks for that info-I knew there had to be more to it.

I think I'll do one of those options you both listed above.
But which one?
Right now I have Flowmaster 3"cat back installed. I'm wondering...

1. Would the high-flow catted midpipes typically be a more affordable route than headers? Im not sure what high flow catted midpipes even are....is it a street legal?

2. Would either of them jeopordize the warranty? I know headers are really loud, do the mid pipes get just as loud as well?
Thanks

[Padre]

Originally Posted by MR-02

Hey, Thanks for that info-I knew there had to be more to it.

I think I'll do one of those options you both listed above.
But which one?
Right now I have Flowmaster 3"cat back installed. I'm wondering...

1. Would the high-flow catted midpipes typically be a more affordable route than headers? Im not sure what high flow catted midpipes even are....is it a street legal?

2. Would either of them jeopordize the warranty? I know headers are really loud, do the mid pipes get just as loud as well?
Thanks

JBA and Solo make the high-flow catted midpipes. They replace the stock dual-cats (on each side) with a single high flow cat.

Both maintain the O2 sensors and should not throw a code nor require a tune. As long as you do not tune it, your warranty should be OK, plus you should be able to pass emmissions. No exhaust systems are fully "street legal" but you should be OK anywhere but California.

The sound is not as loud as full headers. It will add a nice tone to the exhaust but nothing as loud as your Flowmaster.

Padre

[OCD]

I can't get my picture to load: but I had to put mine in too:

WinPEP DynoJet Performance EP:

Max HP = 504.59
Max Torque = 445.97

Dynatech headers, high flow cats, Magnaflow 3" Comp. Exh., St. 2 Livernois Cam, Vortech V3 si supercharger.