2006 pontiac GTO
Thread Starter
Teching In
Joined: Jul 2019
Posts: 5
Likes: 0
2006 pontiac GTO Hey guys i dont know if its the right place to post but ive been having issues with my car on a dyno and im going nuts out here i would appreciate opinions and comments and ideas.
06 gto ls2
stock bottom end
ls3 prc milled and ported heads
gpi ls3 intake
staiess works 1 3/4 headers
svede intake
e85 injectors
walbro450
runs on e85
3in pipe
pat g custom spec cam 23x-25x .629 .615 lift
circle d 3800
spool
3.91 gears
1 piece drive shaft
built tranny 4l65e
ac delete
ps delete
weight reduction
mezzier electric water pump
slicks and front runners
well the car is a beast on the street runs good at the track
fastest at the track has been a 10.9 at 126 mph yet when i go put the car on the dyno its only making 376 hp to the wheels how is this possible, ive taken the car to 2 different dynos in the area and the both give me pretty much same results ive tried different tuners and both of them have told me that the car feels like something wont let the car open up the whole way takes a while to reach the powerband and yes in the videos you can hear the car, sounds kind of weird when it trues to open up like is something was just not letting it turn up do you guys think it can be me torque converter maybe its to tight? What do you all think, ive about done everything to the car except change torque converter
06 gto ls2
stock bottom end
ls3 prc milled and ported heads
gpi ls3 intake
staiess works 1 3/4 headers
svede intake
e85 injectors
walbro450
runs on e85
3in pipe
pat g custom spec cam 23x-25x .629 .615 lift
circle d 3800
spool
3.91 gears
1 piece drive shaft
built tranny 4l65e
ac delete
ps delete
weight reduction
mezzier electric water pump
slicks and front runners
well the car is a beast on the street runs good at the track
fastest at the track has been a 10.9 at 126 mph yet when i go put the car on the dyno its only making 376 hp to the wheels how is this possible, ive taken the car to 2 different dynos in the area and the both give me pretty much same results ive tried different tuners and both of them have told me that the car feels like something wont let the car open up the whole way takes a while to reach the powerband and yes in the videos you can hear the car, sounds kind of weird when it trues to open up like is something was just not letting it turn up do you guys think it can be me torque converter maybe its to tight? What do you all think, ive about done everything to the car except change torque converter
Launching!
Joined: Mar 2019
Posts: 272
Likes: 89
I had a 496 stroker, 650 horse build that only put down 350hp on a dyno. But the car was a beast and would outrun >95 % of cars on the street. A dyno sheet is just brag rights but a 10.9 at 126 is way more brag rights. They said I had a loose converter. Sure it hurts but let a track grudge match do the talking..
Thread Starter
Teching In
Joined: Jul 2019
Posts: 5
Likes: 0
I had a 496 stroker, 650 horse build that only put down 350hp on a dyno. But the car was a beast and would outrun >95 % of cars on the street. A dyno sheet is just brag rights but a 10.9 at 126 is way more brag rights. They said I had a loose converter. Sure it hurts but let a track grudge match do the talking..
Staging Lane
Joined: Apr 2018
Posts: 86
Likes: 17
are you dynoing with the convertor locked or unlocked? A unlocked convertor will read low. My 'vertor can be locked at wide open... To show the difference, I dynoed with it locked and unlocked, back to back. Locked went 521/499. Unlocked went 487/436. A difference of 34whp and 63wtq
Thread Starter
Teching In
Joined: Jul 2019
Posts: 5
Likes: 0
are you dynoing with the convertor locked or unlocked? A unlocked convertor will read low. My 'vertor can be locked at wide open... To show the difference, I dynoed with it locked and unlocked, back to back. Locked went 521/499. Unlocked went 487/436. A difference of 34whp and 63wtq
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Have you guys been datalogging with it running good on the streets? Comparing em to logs on the dyno? I m aware they should be different, but looking for big inconsistencies
IIRC, typical H/C/I gto s are 450ish whp.
IIRC, typical H/C/I gto s are 450ish whp.
Staging Lane
Joined: Apr 2018
Posts: 86
Likes: 17
I datalog all the time...what kind of differences? I wouldn't think they'd be much difference between the two. The tune doesn't know your on a dyno, it will spin up alittle quicker on a dyno. BTW...mine dynoed 441/412 all motor on the dyno, locked convertor..
On The Tree
Joined: Oct 2010
Posts: 124
Likes: 2
From: Desert
You have some items that aren't exactly dyno number friendly. Especially if you're dynoing with slicks. That aside, who cares what it dynos if it's running 10.90's at 125+
circle d 3800
spool
3.91 gears
built tranny 4l65e
slicks and front runners
circle d 3800
spool
3.91 gears
built tranny 4l65e
slicks and front runners
How exactly do the front runners effect dyno numbers 🤷dum♂️. I just had to say it lol
Internet....my 370whp car runs 10's......
Something is wrong. Why am I not making 500 to the tires? I want to make 500rwhp but if it's ok if it runs 12's
Somethings wrong.
******* ****.
Something is wrong. Why am I not making 500 to the tires? I want to make 500rwhp but if it's ok if it runs 12's
Somethings wrong.
******* ****.
On The Tree
Joined: Oct 2010
Posts: 124
Likes: 2
From: Desert
I swear to Christ. Between the OP and ********* like you, the internet and forums as a whole are turning into a **** fest of idiocy.
On The Tree
Joined: Oct 2010
Posts: 124
Likes: 2
From: Desert
