Toilets

Ok so here is the quick back ground.

Car: 2012 centennial grand sport with npp

At 851 miles I had a base Dyno done. Numbers where 396hp and 389Tq.

Added a halltech intake. Dynod again at 3k miles and did 412hp and 403tq with no tune! Good numbers I thought for a basically stock car.

Final. 3400 miles, halltech intake, kooks 1 7/8th headers with x pipe and cats and a tune.final numbers are 432.95hp and 421tq.

Your thoughts? The tune is conservative as I do hpde events. I just figured headers would have gained me more. I was really hoping for around 450hp and 435tq

Shoaf85

Was it the same Dyno?

tlove32

Those number are very impressive to me. I've never heard of anyone getting 450'ish without a cam

matt_lowry123

I'd be happy as hell with those numbers. I have vararam, stingers, kooks and am only making 393hp/392tq on a mustang dyno.

GS_V

hmm, your dyne numbers are about 10rwhp/10rwtq above ave across the line.

my prev. ls3 c6 dyno'd 389/378 bone stock (as most are), vararam cai, lg headers and tune 420rwhp/420rwtq... 450/435 will not happen..
A medium spec'd cam will get you 475/450

Toilets

Yes it was the same Dyno (dynojet). Forgot to mention we did another run with just the halltech the same day as the headers and tune install with roughly the same numbers.


What I did notice though was the halltech only run was 67.4 degrees when it ran ( about 8am) the headers and tune run it was 84.7 degrees (about 3) but I think the temp change would only be good for maybe another 3-4hp.

Toilets

Thank you. I have to admit the halltech numbers for me was impressive but I hear people gaining 30hp with headers but I only get half that?

JUIC3D

Sounds like an awfully optimistic dyno to me.

Toilets

I would have thought the same but gmtech magazine dynoed the same car stock at 415 , granted, I heard it was very very cold.

and at this level of mods, weren't you a lot higher?

GS_V

the dyno in "corrected" mode adjusts for tempatarture 67.4 degrees 84.7 degrees will show same results..... If the shop is showing you or running the dyno uncorrected, your numbers would be all over the place... Regarding headers, do a search in other threads and you'll see LG's will get you about 15+ more rwtq vs others..

speedraider

Cherokee Nation

Cherokee Nation

Correct:when i had AR's i went from 414 to 444=30,that is the norm,sometimes it is more then 30,all depends on the dyno & the Tuner.

Cherokee Nation

Why 1 7/8's...1 3/4 ar's would bring your number up.

HOXXOH

What the dyno numbers are, is not important. The 36 HP gain is the meaningful number.

I understand your disappointment though. Since the manufacturers advertise all those big numbers, your expectations don't get met.

If you ask the dyno operator for a 450 HP sheet, he can probably make it happen. The real number you want to improve is ultimately on your lap time timeslip.

Detoxx03

Those numbers are fine.

COVERT GUY

Your numbers seem to be within range for the mods you have done.

FloydSummerOf68

Numbers seem high from stock to modified, but picking up 21rwhp from headers isn't bad. It's not the best either, but a more aggressive tune could possibly get you another 4-6rwhp...who knows.

Boomer111

ricknyc23

I was thinking the same thing...[


QUOTE=JUIC3D;1582603060]Sounds like an awfully optimistic dyno to me.[/QUOTE]