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dyno results

rob77

By rob77,
in Western Australia

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rob77 Veteran

rob77

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After fitting a hurricane pod from autoworx I ended up with a big misfire problem. With the hurricane pod on the car was running very rich with boost set at 0.6bar as extra air was flowing over the AFM it seemed to be dumping in a whole heap of extra fuel, on 0.8bar I kept on hitting some sort of fuel/boost cut as soon as the turbo spooled up to 0.8bar. Putting the HKS pod back on fixed the problems so it was narrowed down to the ecu needing a reset with the hurricane pod on. Tried to do this the next morning, but I dont have the key from cyclops to disable my siren, so I couldnt really reset the ecu for any long length of time. Having no success I decided to go back to the HKS pod, this time at full throttle on 0.6 and 0.8bar I was getting a baffled "pop pop pop" noise from the exhaust. I thought it was a misfire, other people told me it wasnt. So at SST today we fitted up a combined wastegate and exhaust gases dump pipe with a much larger flange stepping out to ~2.75" at the front pipe as well as a 2.75" to 3" front pipe. We fired the car up on the dyno and the noises start again, steve confirmed this was a misfire so we pulled out the plugs and put some new platinums in I was saving for the ecu swap-over. Ran the car up again, now its only a 10hp gain over the last dyno run (just dump+front pipe this time) but the on the road gains are HUGE. Boost is coming on faster and harder and my 0.6bar setting is now running around 0.7bar. The odd thing is this, my EBC holds boost at 12.5psi from 2600rpm to 4800rpm then the valve timing kicks in and boost immediately (not tales off) drops to around 10psi. So due to this on my first setting and second boost setting I get pretty much the same peak power output. At the end of the day I'm happy, 245hp @ wheels is nice for the basic mods I have done. The next few things will probably be cosmetic or to assist the engine rather than make HP, like a lighter flywheel (as per rev210's success with his lightened flywheel, 0.4seconds off the 1/4 mile is huge) and a oil catch can, was a bit of oil in the intake manifold when steve pulled it off to change the plugs. Then it'll be time to do the ecu plus a new fuel pump or regulator and should be hopefully pushing 300hp and try and fix up this odd boost curve :( Thanks to steve @ sst for the engine work and dyno :)

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