2008 Cobalt SS dyno with BTF KO4+ turbo

My 2008 Cobalt SS on the dyno.
Mods: Synapse Turbo intercooler, charge piping, and catless downpipe. Synapse engineering BOV. Bald Turbo Freak KO4+ turbo. Dejon Powerhouse intake with AEM filter. Car put down 301WHP and 310WTQ on SAE correction with a smoothing of 5. Rest of the exhaust is stock as of the video, now i'm running Mandrel Exhaust Systems 3" stainless steel exhaust with muffler delete.

Category:

Autos & Vehicles

Tags:

• cobalt
• ss
• ss/tc
• btf
• dyno
• BOV

[PoppaSnipe]

I think some of you miss the point of this upgrade. The new wheel upgrade will let the car pull to 7400 rpm's, the factory turbo runs out of power at 5500rpms. This will translate into a higher trap speed in a lower gear with the rev limiter bumped up to make that power THROUGHOUT the entire rpm range, not just to 5500 rpm. I'd be happy with 30-50 whp with this modification and pulling all the way to a higher red line. Dyno queens don't always mean faster at the track.

[hiltu63]

@PoppaSnipe only if that were true, my numbers fall off at about 6K, not much power to be had above that. Mind you i have full bolt-ons and a progressive water/meth kit too.

[PoppaSnipe]

@hiltu63 So your barely making more power to the wheels @ 500 rpms then stock? Something doesn't seem right, why would you keep this turbo on your car since it doesn't show no real improvement over stock? On top of that you say you have all these problems tuning it. Why not just go back to stock or a proven turbo upgrade then?

[hiltu63]

@PoppaSnipe and waste the time swapping turbos? besides that im able to safely run more boost because of the lighter wheel. My car, and only my car has run into these issues. I have recorded 33 pulls on Bald Turbo Freaks personal dyno, hes stumped. My car is "weird". im the exception to the rule. My car is a strong runner and because of the turbo i feel safe to beat on it and not fearing what i would if i were still stock turbo.

[09slowbaltTC]

not ragging but thats a really low number when stock turbo balts putting down 345 to 350 hp with 400 tq with trifecta tune im trifecta with infiniboost at 26 psi relocated maf dejon piping dejon intake 3 in turbo back and no cat no muffler and synapse bov, but i no im above 320 getting dyno when it warms up but i didnt want to spend 8oo bucks for 10 hp tho you no why i was wondering

[hiltu63]

@09slowbaltTC Also to boot, my numbers are SAE, lots of guys use STD. I believe there is a ~4% discrepency between the two.

[PoppaSnipe]

@hiltu63 Ah, so you are the black sheep of the cobalt ss/tc world as far as the BTF turbo wheel upgrade goes. Sorry your having so many problems and others are having great success, thats how luck runs some times.

[hiltu63]

@09slowbaltTC all cars come stock on a bell curve, the average is 240WHP but some come higher and some come lower, mines on the low end. It took the upgraded turbo (without tuning) and before the learn down feature took hold to get i believe 247WHP. On BTF's site that setup should be close to 275WHP. So ive battled that handicap through my whole build. Also i'd like to note ive driven my car 15K miles on current setup (322WHP and 360WTQ) and the only breakage was BOV spring.

[hiltu63]

i paid about $600 for the turbo (military discount). My final numbers are 322WHP and 360WTQ. Also want to state i've put almost 20K miles on this setup with the only breakage/maintenance being the spring in my BOV. So i think im doing good

[09slowbaltTC]

dude is it worth the money for this upgrade. its close to a grand just for a wheel correct? and how much final whp and tq you putting down looking into this more. but zzp making a kit that has 500whp with stock motor.