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It's my first turbo car (high school dream car) and the first week of driving was pretty insane feeling the Boost come on. Initially was seeing 2nd gear roll-ons generating 1.4 bar pretty consistently. However after a couple weeks it started to feel seriously sluggish. Would limp its way to 0.7 bar and maybe under the hardest roll could get to 1 Bar.
I was concerned that the sketchy place that did my SMOG deleted my GIAC Flash. That or a boost leak.
So.... made my way over to FFTEC in Hayward, CA. Awesome group. Super enthusiastic about tuning...super friendly and straight up honest guys. They told me one of my intercooler hoses had disconnected on the left side completely. So on the one hand I was happy that they found the significant boost leak but on the other hand I'm somewhat concerned what damage I might have caused long-term from continuing to drive with effectively only one working turbo Bank. Or maybe I'm wrong there.
As promised....here is the dyno sheet.
Mustang AWD Dyno.
91 Octane Chevron.
Outside Temp ~85F
440 tq
399 hp
I welcome any feedback on the dyno run. If I'm being honest these results are pretty disheartening given what AWE and GIAC both advertised - 503Whp. And that 996tt eith X50 is rated at 450hp crank. I know they use 93 octane... and dynos can differ but seriously it's 100hp diffetence...no small beans. AND if my car with those not so cheap mods is only doing 400 HP at the wheels I'm scared to think what a bone stock 996tt would do.
so is this run in line with expectations or is this Dyno just that Uber conservative?
996tt Dyno with AWE K24 turbos, Exhaust, and Intercoolers with GIAC Tune
I’m confused here. Is this dyno run before or after the intercoolers coupling was addressed? 1.4 bar seems like you’re boost spiking if it’s falling to .7 bar. Check for more leaks. Do you have a durametric cable? I’d recommend a datalog of how the engine is running and sending it to one of the tuners on here (Sam,Kevin,markski) all are super super super genius’s about these cars.
Your car has more in it, you just need to find this issue.
Just to be clear the dyno graph above is what they did after identifying the boost leak. They said it was just the one. I saw markski videos on boost leak on YT a bunch...hence i went for my own test.
So...399Hp on mustang dyno with K24s...GIAC Stage 2 Pump...and AWE Intercoolers and Exhaust.
Seems too conservatives assuming a bine stock X50 dynos...what? Maybe 360hp on Mustang?
ill chalk it to their dyno is callibrated different...and hopefully there isnt another boost leak.
ELI5....What is a durametric cable and is this something i can do/download after the fact? Wanna get this figured out...
Just to be clear the dyno graph above is what they did after identifying the boost leak. They said it was just the one. I saw markski videos on boost leak on YT a bunch...hence i went for my own test.
So...399Hp on mustang dyno with K24s...GIAC Stage 2 Pump...and AWE Intercoolers and Exhaust.
Seems too conservatives assuming a bine stock X50 dynos...what? Maybe 360hp on Mustang?
ill chalk it to their dyno is callibrated different...and hopefully there isnt another boost leak.
ELI5....What is a durametric cable and is this something i can do/download after the fact? Wanna get this figured out...
all well and good but did you do a full boost leak test? Markskis is super super thorough.
A durametric cable is cable that you connect to your car using a laptop and you’re able to datalog th car. Which means you’re able to check the parameters of the car to see if there are any anomalies. The cable is able to do a lot more butbyou can research that.
another thing to remember... mustang dynos are called heartbreaker dynos.
honestly giac tunes are just horrible. even worse than a epl file. trade up to a cobb setup with a 93 cobb tune or remote tune from emre will make the car feel 100% different
all well and good but did you do a full boost leak test? Markskis is super super thorough.
A durametric cable is cable that you connect to your car using a laptop and you’re able to datalog th car. Which means you’re able to check the parameters of the car to see if there are any anomalies. The cable is able to do a lot more butbyou can research that.
another thing to remember... mustang dynos are called heartbreaker dynos.
Yah, the numbers were a heartbreaker...but I knew that going in. Still...the numbers just dont add up. Lets say a stock X50 996tt dynos a very conservative 360hp on a mustang (given 444-ish crank). Then that means i am ONLY getting an extra 39hp from 1) GIAC Tune 2) AWE Exhaust 3) GT2 Intercoolers. Or basically 13hp from each upgrade. Really???? TUNE Should be 30-40hp alone...right?
Either the dyno I used is suuuper conservative....even more than others...or something is still wrong. Wish I knew for sure what X50s dyno on mustangs....
I know the feeling all too well my dude. My car has k16/k24 hybrids, intercoolers, Cobb protune, no cats, fabspeed exhaust, ported exhaust manis, gt2 intercoolers, 5 bar fuel pressure regulator, diverted valves. Figured I’d be high 400s.... went on the mustang dyno.... 426 awhp.
ive since updated my tune and put in gt2rs intercoolers and took care of my boost leaks. Waiting to see what I do when I go back
Those numbers don’t look right. My personal 996tt made 500whp/520wtq on a mustang. Mods were billet k16s, custom 4.5” ICs, high flow cats, 2.5” exhaust, 72lb injectors and a custom tune. The car was an animal on that set up.
Yah...total head scratcher because tq looks "decent"....but tune alone shoukd do what? Maybe +70tq alone?
TBH...both numbers seems like 10-12% lower than others I have seen online with nearly identical setup on mustang dyno. As if only getting inctease power from Tune or All Bolt Ons (ICs, Exhaust, DVs)....not both.... :-/
Dyno numbers are meaningless and unless you are comparing them to other known quantities under the same conditions on the same dyno. When I dynoed my car on a Dynojet at 1.2bar, we got 621.70whp/720.17wtq. On the same dyno, under the same atmospheric conditions, two different gull wing supercharged Mercedes SLS AMGs spun the rollers there at 483 and 500whp. Under slightly cooler temperatures, a 2015 stock supercharged Z06 spun the same dyno at 589.02whp/613.17wtq. The Z06 is probably the best reliable bench mark for comparison here as it is officially listed by Chevrolet at 650/650 crank hp so you can draw conclusions from that. You really need an apples to apples comparison on the same dyno to provide meaningful data. Always catalog your dyno runs so you can analyze what the engine is doing with respect to fueling, AFRs, etc, etc...
Last edited by powdrhound; 06-24-2018 at 03:20 AM.
Still boggles my mind that we in the automotive community can't get this ish straightened out. Seems like an area ripe for disruption.
I guess it's like quarter mile times. One day you run 12 seconds the next day you run 11 seconds. However the time you run comes down to Performance and not at all to the tool used to measure sais performance. Ie. All stopwatches measure time the same.
At the end of the day a Dyno "meter" is simply a measurement tool...and such measuring sticks should be constant. Right? Cant believe nobody has figured a solution to this.
06-23-2018, 10:33 AM
996TT Dyno Results w/GIAC K24 AWE Exhaust and IC
