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#1
10-29-2014, 08:20 PM
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Injector information
Hi guys,
Our M120 engine currently has the OEM injectors Part number 0000785049 which I believe are 200cc/min or close to that. We are looking to grow the performance of our engine and ideally need to run larger injectors. We know we can use aftermarket injectors and make them fit etc, but I just wondered if anyone knew of any MB or OEM injectors that will fit in place of the stock units but are 300 or 400cc/min instead ? They are 14mm size top and bottom o-ring. We are running an aftermarket ECU so tuning is not an issue. Any specialists out there who might know ?? 
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#2
10-29-2014, 09:25 PM
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The injectors you have are a pretty standard size and it would probably be harder to find injectors that wont fit than ones that do. The aftermarket is rife with options, the most important question is whether you want to run low or high impedence injectors. Next most important is how much hp you intend to make. With that info you should be able make an informed selection.
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 90 300TE 4-M Turbo 103, T3/T04E 50 trim T04B cover .60 AR Stage 3 turbine .63 AR A2W I/C, 40 LB/HR MS2E, 60-2 Direct Coil Control 3" Exh, AEM W/B O2 Underdrive Alt. and P/S Pulleys, Vented Rear Discs, .034 Booster. 3.07 diffs 1st Gear Start 90 300CE 104.980 Milled & ported head, 10.3:1 compression 197° intake cam w/20° advancer Tuned CIS ECU 4° ignition advance PCS TCM2000, built 722.6 600W networked suction fan Sportline sway bars V8 rear subframe, Quaife ATB 3.06 diff
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#4
10-29-2014, 10:05 PM
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Plugging your numbers into an injector calculator comes up with 275cc injectors to reach your target assuming you run a m/b 4 bar regulator and leave 20% headroom. I'd be tempted to go with something a bit larger maybe 300 to 325 cc in case later tuning surpasses your current target. Not that it matters much in your build but I'm sure that wouldnt be too large for good low rpm manners.
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90 300TE 4-M Turbo 103, T3/T04E 50 trim T04B cover .60 AR Stage 3 turbine .63 AR A2W I/C, 40 LB/HR MS2E, 60-2 Direct Coil Control 3" Exh, AEM W/B O2 Underdrive Alt. and P/S Pulleys, Vented Rear Discs, .034 Booster. 3.07 diffs 1st Gear Start 90 300CE 104.980 Milled & ported head, 10.3:1 compression 197° intake cam w/20° advancer Tuned CIS ECU 4° ignition advance PCS TCM2000, built 722.6 600W networked suction fan Sportline sway bars V8 rear subframe, Quaife ATB 3.06 diff
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#6
10-29-2014, 10:20 PM
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I dont have part numbers for you but I'd expect any EV1 injector beteeen 25-35 lb/hr would work for you. Dont forget most injectors are rated at 3 bar and the stock regulator in the m/b rail is 4 bar.
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90 300TE 4-M Turbo 103, T3/T04E 50 trim T04B cover .60 AR Stage 3 turbine .63 AR A2W I/C, 40 LB/HR MS2E, 60-2 Direct Coil Control 3" Exh, AEM W/B O2 Underdrive Alt. and P/S Pulleys, Vented Rear Discs, .034 Booster. 3.07 diffs 1st Gear Start 90 300CE 104.980 Milled & ported head, 10.3:1 compression 197° intake cam w/20° advancer Tuned CIS ECU 4° ignition advance PCS TCM2000, built 722.6 600W networked suction fan Sportline sway bars V8 rear subframe, Quaife ATB 3.06 diff
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#8
10-29-2014, 10:40 PM
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The spec is 3.6 to 4.2 bar. Less at high manifold vacuum more a low vacuum. My injectors are rated 36lb/hr but flow right at 40lb/hr at 4 bar.
__________________
90 300TE 4-M Turbo 103, T3/T04E 50 trim T04B cover .60 AR Stage 3 turbine .63 AR A2W I/C, 40 LB/HR MS2E, 60-2 Direct Coil Control 3" Exh, AEM W/B O2 Underdrive Alt. and P/S Pulleys, Vented Rear Discs, .034 Booster. 3.07 diffs 1st Gear Start 90 300CE 104.980 Milled & ported head, 10.3:1 compression 197° intake cam w/20° advancer Tuned CIS ECU 4° ignition advance PCS TCM2000, built 722.6 600W networked suction fan Sportline sway bars V8 rear subframe, Quaife ATB 3.06 diff
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