2003 cobra, 23k miles,
jlt cai, magnaflow catback, upr o/r x pipe, sctba2600 maf sensor, 2.81 s/c pulley, 2 aftermarket idlers stock size, bigger belt.
Before the xpipe and before I installed a spec stage 2+ clutch and steel flywheel (never. again. shop recommend steel for whatever reason, should of done more research) she dynoed at 438whp/478whtq at 14 psi.
Just took it back for a retune and she layed down a whopping 414/451....wait, WHAT?!
Rather than write a book about the numbers, here are some pics:
Shop said they were having trouble with belt slip and tire spinning so they had to tie it down quite a bit, which is understandable since it was fairly cold out. This run is making more boost than when I had it first tuned, yet less power? And looking at the psi it's clear that the belt slip was fixed that run. So why am I making such low numbers?!
I also need to note that the car does feel STRONGER than before, which is odd considering the numbers it made. It feels even more torqy and faster at certain speeds. I did notice some belt slip while going up a slight hill in third gear on the highway, I'm thinking this is because of the extra load from going up a hill because I did a few more runs on level ground and no slip. The shop also mentioned something about there was no air correction since the temperature outside was perfect. Also it has a steel flywheel, not aluminum. And it has the boost bypass mod, which the shop checked to make sure the actuator was working and its working perfectly. I honestly think the numbers are because of wheel spin but how then how the hell do these 700 and 800 whp cars throw down the numbers they do?!
jlt cai, magnaflow catback, upr o/r x pipe, sctba2600 maf sensor, 2.81 s/c pulley, 2 aftermarket idlers stock size, bigger belt.
Before the xpipe and before I installed a spec stage 2+ clutch and steel flywheel (never. again. shop recommend steel for whatever reason, should of done more research) she dynoed at 438whp/478whtq at 14 psi.
Just took it back for a retune and she layed down a whopping 414/451....wait, WHAT?!
Rather than write a book about the numbers, here are some pics:
Shop said they were having trouble with belt slip and tire spinning so they had to tie it down quite a bit, which is understandable since it was fairly cold out. This run is making more boost than when I had it first tuned, yet less power? And looking at the psi it's clear that the belt slip was fixed that run. So why am I making such low numbers?!
I also need to note that the car does feel STRONGER than before, which is odd considering the numbers it made. It feels even more torqy and faster at certain speeds. I did notice some belt slip while going up a slight hill in third gear on the highway, I'm thinking this is because of the extra load from going up a hill because I did a few more runs on level ground and no slip. The shop also mentioned something about there was no air correction since the temperature outside was perfect. Also it has a steel flywheel, not aluminum. And it has the boost bypass mod, which the shop checked to make sure the actuator was working and its working perfectly. I honestly think the numbers are because of wheel spin but how then how the hell do these 700 and 800 whp cars throw down the numbers they do?!
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