Anyway to add better injectors so I can over fuel for nitrous by spraying cold nitrous on MAF?
Just hoping I don't have to run a wet system,concerned with fuel pressure from fuel rail..
I suppose the test port is where to tap in for regular wet system.
Anyone do any performance work beside turbo charging on a HFM car? I would rather if I had to,too a run supercharger.then no headache as far as exhaust.
How is a super charger run,extra bolt on part to crank pulley?Or longer serpentine belt?

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1999 w140, quit voting to old, and to old to fight, a god damned veteran

The trick to adding larger injectors is finding out what size the HFM can run within the regular adaptations. The stock injectors are around 19-21lbs. Get a set of 30lb injectors and see if the car will run with them and not set codes. That would support probably a little over 300hp. I would just run a wet system though. Your fuel system will keep up to around 400hp. Over that I would replace the pumps. I still run a stock fuel rail with bigger injectors. I have a walbro 255 though. You should run a fuel pressure cut off on the nitrous system anyway. Put a wide band in with a gauge or a data logger and make sure that you are not lean.

OK I checked wet is the way to go.How does a AFR meter hook up/I know it needs power,ground and Rpm.But the other 2 wires.

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1999 w140, quit voting to old, and to old to fight, a god damned veteran

Since your car already has all the wiring in place for EFI, switching to MSQ or VEMS would be a breeze compared to the rest of us fiting the evils of KEjet. Once you have it runnung forced induction or nitrous would be a breeze and you can run any size fuel injectors you want. You might convince HFM to run with slightly larger injectors but you'll be giving up fuel economy emissions etc etc.

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CENSORED due to not family friendly words

I'll find some one to hook it up. I want a switch that will not let nitrous thru if no fuel.

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1999 w140, quit voting to old, and to old to fight, a god damned veteran

I think that kind of switch is included with the N2O kit.
Regards, Eric

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89 300E "Benzer1" 15.924 Uncorrected
93 400E "Benzer3" 14.200 U.C.
95 E420 "Benzer4"
92 300E "Benzer5" 16.299 U.C. Future turbo CNG
87 300D "Benzer7"
87 300D "Benzer8"
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87 300D/70 AMC Javelin "Sidewinder-Benzer"
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71 AMC Javelin AMX 401 "Sidewinder"
74 AMC Hornet 401 "C.K.10" 13.63 U.C.
74 Bricklin SV1 "Presto" AMC 360 pwrd.

you can run Volvo injectors they fit on the m104 hfm without any modifications, i am running orange ones from a t5 turbo 30lb injectors without any problems, the injectors are being controlled by megasquirt, they are also 42lb injector on Volvos which fit aswell. i do believe the same injectors are used on mustangs.

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Thank taint but I will run a wet system.I'll start at 50 hp then leave it at 75hp.With my other mods that should bring near V8 territory.Hope to nail a 500.

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1999 w140, quit voting to old, and to old to fight, a god damned veteran