June 25, 2006My kid has a 2003.5 Mazdaspeed Protege. He's noticed lately here in Texas that when it's really hot, and the engine is hot, his turbo boost is essentially non-existent. He has a stock intercooler, and an aftermarket intake. Any thoughts? Normal?
Forums : Performance General : Non-PT Turbo question (748 Views)
June 25, 2006upgrade that intercooler and you might want to think about a co2 intercooler cooler sysytem over heating a turbo is never a good thing. that stock intercoolers are nice and all but they are jus that STOCK for minimul performance usage. if you want to bring out the full potential of the turbo get a Greddy turbo control and a better intercooler you'll notice perfomance gains.
June 25, 2006Boost leak, boost leak, boost leak. Look at the intercooler ( IC ) hoses. Still using factory worm drive hose clamps? Switch to T bolt clamps. Do a boost leak check. Pretty simple to make your own boost leak checker. Besides the IC hoses other hoses can leak boost. Forget about replacing the intercooler. That won't help unless the IC itself is leaking boost. Boost should be higher when it is hotter out. I have a Stage 2 SRT-4 and around 70 degrees my boost will spike to 16-17 lbs in 3rd gear. Today it was 102 degrees out and I was spiking to 20. I'll bet you have a boost leak. Oh yeah, turbo's run a lot hotter than non turbo's. It's normal. Also, my car is beyond stock (stock spike is 13) and the stock IC works alright. I may upgrade to a direct fit, better flowing IC eventually but it is not a necessity at this time. An aftermarket intake will get you a whopping 2-3 hp but you'll lose torque because of sucking hot air from the engine. On the dyno I've seen as much as 19 lbs/ft of torque lost because of an intake. Best is the factory airbox with a K&N drop in filter. Only when going to a bigger aftermarket turbo is an intake worth it.