240Z, 260Z, 280Z Performance / Technical Discussions related to performance motor enhancements, upgrades.

SU mods

Old 04-30-2013, 10:39 PM
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SU mods

i have dual SUs on my 73 240. currently i have a fully rebuilt 82 f-54 block with a late (4th) e-88 head. i am wondering what simple mods i can make to the bell type SUs to gett a little more out of them. i dont want a huge change or anything that could trash or ruin them. also this is a driver not a racer so im stop and go. i plan to put a cam on the car that is stg 2 or 3. low end accel *** apposed to top end speed. ive searched the forum for 3 hours and nothing that really caters to what i want.

i guess what im asking is there any small part that can be changed or any minor machining to get a litle more air flow or better mixture.
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Old 04-30-2013, 10:52 PM
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Adjust / tune / sync them. You can also swap out the needles / jets. Search Google for: "240z Gross Jets and SM needles"
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Old 05-01-2013, 07:11 PM
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i have the carbs tuned and synced properly. i have the Zthereapy dvd that i used for this as well as the nicer air flow tool. i will look into the needle swap. thanks.
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Old 05-01-2013, 07:30 PM
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If you change jets you can put a lighter weight oil in the domes to help them open faster.
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