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Dear Sarah, What are the kinds of progress that have made turbo charging so usable this decade or so? 'Back then', car reviews will tell you how severe the turbo-lag…

AEM water / methanol injection  Hi Sarah, I have a one gallon AEM water/meth injection kit. I was wondering about the mixture. When referring to a 50/50 mix for water/meth…

I keep hearing that blankets, wraps and ceramic coatings overheat turbos. Retaining heat in exhaust manifolds help with scavenging and lower under hood temperatures. Are our forum “self proclaimed engineers”…

  The Greddy Type-S is offered either as a blow off or bypass valve. It is intended to protect a turbo's bearings from undue stress caused from compressor surge and…

Ask Sarah: Dimples on Cars by Sarah Forst   Why does an “illegal” golf ball travel further than a regulation golf ball? Can this effect be applied to cars, for…

    Ask Sarah: Bargain Basement Mods   By Sarah Forst   My money tree didn't bloom this year and digging through the dumpster outside MotoIQ hasn't been very successful…

Ask Sarah: MotoIQ “linked in” By Sarah Forst   Why reinvent the wheel?  All the answers below also have links for more detail. It's MotoIQ extra credit! I have a…

  I've heard of spraying a head gasket with copper spray.  Is there a greater benefit to using a solid copper head gasket? Norby Urbano   Some people swear by…

Hi Sarah, I have a question that's been bugging me for years. It's a two-fold question relating to the same scenario. Say I would like to accelerate to a specific…

Ask Sarah: Troubleshooting fuel pump issues, console lighting, and removing tar from clear coat By Sarah Forst Hi Sarah, I have a 2001 Ford Focus that I bought used 3 years…

Ask Sarah: Red or Blue thread locker? By Sarah Forst I just recently completed Eibach lowering springs and anti-sway bars upgrade on my 08 Infiniti G37S Coupe.  My question is…

Hi, first off I have to say I'm a huge MotoIQ fan since I was shown your awesome website by a friend. I have read as much as possible, soaking…

Ask Sarah: what's a hi-po eclectic piston? By Sarah Forst Dear Sarah I was at a car meet and overheard someone talking about hi-po eclectic pistons or something like that.…

I am considering installing a set of Total Seal Piston rings into my SR20VE motor.  What are the pro's and con's of gapless piston rings for a “street” motor? Norby…

Ask Sarah: What's Your Intake? By Sarah Forst Got a difficult tech question? Email Sarah at asksarah@motoiq.com I'm debating going carbs or ITB's with EFI.  What is the advantage to…

Got a difficult tech question? Email Sarah at asksarah@motoiq.com   Hi Sarah,   I saw your EVO project at SEMA 2010 this year- the white car with the KW suspension…

I am wondering about gauges and their importance; specifically, oil temperature versus oil pressure. If you had to choose between the two, which one would you pick? And does it…

 Ask Sarah: I Need More Track Time From My Water Injection System! By Sarah Forst Dear Sarah I have a 1996 Mazda Miata with a Jackson Racing MP45 supercharger and…

Ask Sarah: Is My Lube Still Good? By Sarah Forst Hi Sarah, I got 8 quarts of Royal Purple 5w-30 and it’s been sitting for at least a year and…

  Ask Sarah, Problems with Nuts By Sarah Forst Got a difficult tech question? Email Sarah at asksarah@motoiq.com Hi there, I have a problem with my car and I'm too…

Ask Sarah- Does water injection work? Hey Sarah, I have a turbocharged 1995 Integra GS-R with a T3/T4.  I usually set the boost around 8-10psi but sometimes I get up…

  Ask Sarah- DSM Fuel System Tips By Sarah Forst Dear Sarah I read your last article about using a properly sized fuel system and wondered if my fuel system…

Dear Sarah,  I own a 2001 Mitsubishi Evolution VII and I believe I have lifted the head on the car. I ran around 29psi on a near stock engine (oem…

Got a Tech Question?  Email Sarah at asksarah@motoiq.com   We have a stock 350Z N/A engine.  Can we add a turbo without messing with the ECU if we want to…

   Got a Tech Question?  Email Sarah at asksarah@motoiq.com Since I get so many questions about brake issues, I’m dedicating this column to Brake-mania! But first I must address a…

Sarah sez, “No Phat 19″ chrome wheels on EVOs”. Ask Sarah By Sarah Forst I know back pressure is bad. Everything I remember about high school physics and everything I…