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

SU mods

Old 04-30-2013, 10:39 PM
Registered User
Thread Starter
ZUL8R's Avatar
Join Date: Sep 2012
Location: Alb NM
Posts: 16
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.
ZUL8R is offline  
Old 04-30-2013, 10:52 PM
The Good Twin
NismoPick's Avatar
Join Date: Aug 2005
Location: Wild Wild West, UTAH!
Posts: 20,616
Adjust / tune / sync them. You can also swap out the needles / jets. Search Google for: "240z Gross Jets and SM needles"
NismoPick is offline  
Old 05-01-2013, 07:11 PM
Registered User
Thread Starter
ZUL8R's Avatar
Join Date: Sep 2012
Location: Alb NM
Posts: 16
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.
ZUL8R is offline  
Old 05-01-2013, 07:30 PM
I have a present for you...
theramz's Avatar
Join Date: Mar 2003
Location: dayton, nevada usa
Posts: 1,661
If you change jets you can put a lighter weight oil in the domes to help them open faster.
theramz is offline  
Related Topics
Thread Starter
Last Post
300ZX (Z32) Performance / Technical
11-22-2002 04:53 PM
240Z, 260Z, 280Z (S30) Forums
10-31-2002 02:12 PM
300ZX (Z32) Performance / Technical
07-22-2002 10:13 AM
300ZX (Z31) Forums
06-13-2002 10:37 AM
300ZX (Z31) Forums
06-12-2002 04:33 PM

Thread Tools
Search this Thread
Quick Reply: SU mods

Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.