artinist Posted March 30, 2004 Report Share Posted March 30, 2004 When upgrading the turbo or just raising boost beyond 14 psi it is essential to upgrade the fuel deliver system to be able to provide enough fuel to take advantage of the extra air and to prevent leaning out. here is what you need: I. Fuel pump A) Walbro fuel pump. GSL 392 ~ $120-135 the installation kit includes a couple of brass fittings, a couple of electric connectors and a rubber sleeve. its up to you if you want to get these on your own from the local hardware store for a few dollars. http://www.importpoweronline.com/catalog/i...Path=32_1_22_25 Bosch fuel pump. ~ $200 Bosch makes more pumps than there are M&Ms. be careful what you are getting. here is a few of their big pumps. 0 580 254 984 Â - Â 500+hp 0 580 254 979 Â - Â 500+hp 0 580 254 044 Â - Â 700+hp C) Aeromotive/SX performance Fuel pump. ~ $300 ultimate pump. 1000HP support II. Fuel line For 95% of the applications, the stock fuel line is adequate. BUT, there are serious bottlenecks at all of the fittings. Its highly recommended that all of the fuel lines (not the return line) under the hood be upgraded to use at least -6 lines and A/N fittings. The return line is a low pressure line and does not need A/N fittings. III. Fuel Filter The stock fuel filter will no longer fit when upgrading to A/N fittings. There are many choices for fuel filters that use A/N connections. A good choice is the SX fuel filter ~ $60-70. There are two models of SX filters: the 41002 slim line series and the 41001 series. The 41002 is a smaller diameter filter that is less expensive, while the 41001 is a larger filter with an indicator for filter element replacement. They offer paper and metal replacement elements which are easy to replace. IV. Pressure regulator There are 2 types of fuel pressure regulators (not including low pressure applications) A) OEM factory non-adjustable/standard adjustable fuel pressure regulator (aka Linear, aka Boost Compensating Fuel Pressure Regulator). Raises fuel pressure in a 1:1 ratio in relation to boost. *notice the use of "boost compensating" is nothing but a gimmick to try to fool people into thinking they are ordering a rising rate fuel pressure regulator. every pressure regulator is boost compensating if its installed in a boosted applications. Good units are: 1. SX performance. ~$100 comes with a gauge port 2) Bosch (aka MSD 2222). ~$50 Rising Rate fuel pressure regulator. (aka FMU "Fuel Management Unit"). Raises fuel pressure in ratios other than 1:1. This allows the fuel pressure to be raised to richen the fuel mixture under boost while keeping a stock fuel mixture at vacuum/low boost conditions. There are Adjustable and NON-Adjustable rate unit available. The NON-Adjustable units are typically used in custom supercharger kits. For example the Vortech unit is actually somewhat adjustable by using interchangeable diaphragms but even their lowest rate still adds too much fuel for our application. DO NOT GET ANY OF THESE NON-ADJUSTABLE UNITS. There is only one unit that works good and its made by Bell Engineering/Cartech. There are a few generations of these units. I believe the older models were cast aluminum and red. The newer models are all Billet Aluminum. And the latest generations comes in 4 different versions that have different adjustment variables. retail cost is around $260. TEP sells them for $220 but they can be found on ebay for around $150. The best one for our application is the 2025 which allows baseline fuel pressure adjustment as well. The 2022 and the 2027 will work as well, they just don't allow adjustability at vacuum/low boost conditions. All three models can be used in combination with either a regular fuel pressure regulator or the factory OEM unit. PN: 2025 Aftermarket turbo and supercharger PN: 2027 Same as 2020, except threads are 1/4 NPT PN: 2022 Factory (OEM) turbo and supercharger PN: 2023 Normally aspirated (DO NOT GET) Below is the website to the manufacturers. http://www.bellengineering.net http://www.cartech.net Link to comment Share on other sites More sharing options...
88TSI_Rob Posted March 30, 2004 Report Share Posted March 30, 2004 Fantastic! 8) Link to comment Share on other sites More sharing options...
artinist Posted March 31, 2004 Author Report Share Posted March 31, 2004 I also recommend rewiring the fuel pump. boosted_one has a good write up on that here: http://www.starquestclub.com/index.pl?boar...;num=1054042775 Link to comment Share on other sites More sharing options...
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