Street Performance

Gain Performance: Power, Handling, Fuel Economy

Myths of Street Performance

Sefeldt Auto is also a ROUSH Performance Parts Dealer & Installer

The Benefits of Increased Performance

We can help you get more power out of your car, which - surprising to many - can lead to improved fuel economy.

A properly set up suspension can also improve your safety while making your ride more enjoyable and much less tiring on road trips.

There are many ways we can improve your car's performance: better brakes, better tire selection, and higher-quality or newer suspension components, to name a few.

We can help you enjoy your driving experience more and enjoy increased safety!

Myths of Street Performance (Volvos)

Recently we have been tearing down a Volvo 242 that was set up, we are told, for autocrossing.  The car is a great example of the influence of the myths of street performance. 

The transmission has lost all its synchros and the clutch was compromised and is now useless, by installation errors.  No, it's not running a Volvo transmission - it has a Mustang T5 in it.  Some Volvo performance aficionados believe the T5 is necessary when the Volvo engines are tuned for big power.  This is simply incorrect.  The Volvo manual transmissions are bulletproof.  Improper setup and poor understanding of how the components work together leads to the strange conclusion that the stock transmissions can't handle big power.  In Rolf's words, "I've never seen one break" when it was set up properly.

If you have spent much time on the various "brick" forums on the internet, you will find people blowing up their engines and transmissions with shocking regularity, even though the amount of power their engines are putting out is not so great (not even 350 HP).  This is even more surprising when we consider that Volvo's engineering safety factor is 5-to-1.  This is to say, if a component is to handle, say 100 horsepower (or psi, etc.), then Volvo will manufacture it to handle 500 horsepower (psi, etc.).  Properly chosen components should not blow up so readily.

If you seek higher power, for street performance, the first question to ask is, "where do you want the power?"  This question leads the way.  The 242 we have here at the shop features a very large exhaust pipe.  Because of this insufficient backpressure is generated which reduces power.

Many performance enthusiasts like to put big turbos on their engines.  But this only makes sense if you plan to drive with the revs up around four or five thousand RPM - how else can you spool it up?  If your goal is stoplight-to-stoplight performance then you want a small turbo (or two) that will spool up very quickly and a transmission to transmit that power to the wheels as quickly as possible (a modified automatic transmission for instance).  Other typically overlooked factors make an enormous difference, too.  We guarantee we can build you a car that no one will beat across an intersection.

We have decided to build this "black cherry" 242 into a real monster.  We're aiming for north of 400 horses.  We have started gathering some of the more unusual parts (16v head, etc., for a B23 or a B230).  We'll have pictures when there's something worth putting up here.

Is your car guzzling too much gas?  Problems with "minor" components can lead to unnecessary fuel use - that's money out the tailpipe!  We can tell you what is causing your engine to misbehave, and you could appreciate the difference at the pump!