[anshea]

Hi guys,<P>Although I am not new to Volvos ('76 240 wagon, '86 740 wagon and '96 850 turbo wagon), my current stable only includes Audis (sorry, no flames please!). I am looking at a '91 740 turbo and wondering what the best engine performance mods were for that car/year. Any suggestions would be appreciated. Thank you.<P>-Andrew

 

[towerymt]

Raise the boost with a manual boost controller and install a 2.5" or 3" mandrel bent free flowing exhaust and you'll gain quite a bit of power. A camshaft upgrade will bring a little more, and with a rising rate fuel pressure regulator and water injection, you could run more boost. The only problem is that the '90-95 turbo engine used a small turbo meant to spool up fast and give good low end performance. To really make a lot of power, you'll eventually need a bigger turbo.<P>Check out turbobricks.org, especially the message board for performance advice.<P><A HREF="http://www.dawesdevices.com/" TARGET=_blank>http://www.dawesdevices.com/</A> for the MBC, or build your own.<BR><A HREF="http://engstrom.net/scstore/" TARGET=_blank>http://engstrom.net/scstore/</A> can supply a nice exhaust system from BSR in Sweden, or have one custom built.<BR>Unitek in Sweden has a good cam for the turbo, but <A HREF="http://www.mvpvolvo.com" TARGET=_blank>MVP</A> in Oregon is also designing a cam.<BR><A HREF="http://www.cherryturbos.on.ca" TARGET=_blank>Cherry Turbos</A> in Ontario, Canada does great work with the Mitsu turbo on the Volvos. They also build upper and lower chassis braces, which you can buy from IPD.<P>Many of these places are on my 240 links page below.<P>