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martx-5
Yoda
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I've modified my engine when I did the restoration, and have been messing around with an O2 sensor to get air fuel ratio numbers for dialing in the carbs. The narrow band sensor I installed is OK, but isn't really accurate enough outside of the stoichiometric range, so I decided to install a wide band sensor and gauge. I really don't need all of this stuff, but I like toys to play with and it's neat to use modern technologies on these 50 year old cars.
This brings me to the SU needle program that I found online that may be of interest to you guys out there that may want to play with different needles because of changes you made to your engine.
I called Joe Curto last week and told him what mods I made to the engine etc, and that I was running lean in certain areas so he suggested some different needles which I poked into the program while I was talking to him. We finally decided on a pair of RH needles. Within the next week or so, I'll finish getting the wide band installed and try the new needles out.
There's also another SU needle program that I ran across, but you have to download it. There are two versions, the one that is free, and the one that cost a couple of pounds. I have the free version, and it is useful in finding needles that are similar to your original, but either leaner or richer.
BTW, Kas Kastner suggested using RA, RB, or RC needles in his competition prep manual. These are very rich, and are obviously used in only full race engines.
Anyway, fun stuff to play around with.
This brings me to the SU needle program that I found online that may be of interest to you guys out there that may want to play with different needles because of changes you made to your engine.
I called Joe Curto last week and told him what mods I made to the engine etc, and that I was running lean in certain areas so he suggested some different needles which I poked into the program while I was talking to him. We finally decided on a pair of RH needles. Within the next week or so, I'll finish getting the wide band installed and try the new needles out.
There's also another SU needle program that I ran across, but you have to download it. There are two versions, the one that is free, and the one that cost a couple of pounds. I have the free version, and it is useful in finding needles that are similar to your original, but either leaner or richer.
BTW, Kas Kastner suggested using RA, RB, or RC needles in his competition prep manual. These are very rich, and are obviously used in only full race engines.
Anyway, fun stuff to play around with.
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