MembersPage/KarlBuchka/Fuel (2008-07-07 13:19:13)

I have still not purchased new injectors, but as of writing I am looking at Delphi Multec 1 95 lb/hr injectors (~1030cc). Currently trying to find a detailed spec sheet, but with little luck. Here is what I know (from http://www.racetronix.com/17113744FM.html):

I have located this Delphi webpage: http://go.delphi.com/CS/dpss/catalog/ProductInformation.aspx?PartProductID=FJ10456

Apparently the Delphi part number is FJ10456. The site lists no other useful information.


MembersPage/KevinBlack/InjectorSpecDatabase has a complete looking set of these numbers for the Delphi 95lb/hr injectors. Mirrored here:

Delphi Low-Z 95#/hr (with 30v TS diode and 6R8 resistors)

Any suggestions on the other figures?


The low-z injectors will require power resistors. As mentioned earlier, I can source them in almost any spec I want. I understand the resistors are used for current limiting, but how much current am I aiming for? A couple of quick calculations yields a 12ohm resistor for a current of 1A and 5ohm for 2A (both assuming 2ohm injector resistance and 14V supply).

PhatBob's UserGuide states that 6.8ohm/50W power resistors yielded good results on 'Delphi 1000cc injectors'. This leads me to believe that they were using the same injectors as I intend to.

6.8ohm/50w resistor, $3.57: http://www.newark.com/26M4936/passives/product.us0?sku=WELWYN-WH50-6R8JI


I calculated req_fuel to 2.89 using (6.49 * 2300[cc] / 5 / 1032[cc/min]). Is it worth it to halve this and double my VE values?


As of now I plan to use my current Megasquirt fuel map (with values scaled) as a base map.