nomuken Posted July 28, 2020 Share #625 Posted July 28, 2020 On 5/2/2019 at 11:32 PM, duffymahoney said: I screwed something up in the trans rebuild, it becomes tight with the front cover on, plus I guess I love spending money, so I decided on the KA swap for my 240z. This is a longer tail shaft on the trans, so it should fit in my series 1 better (no cutting), plus the 1st is better gear ratio and 2nd is slightly better. I found a 1989 240sx trans, with 576 miles on it. It's been in storage inside since 12/01/89! Zinc is still in tact. Paid too much for it, but hopefully it's good. The shop tested all the gears and syncros. Digging up this older post. I have a series 1 to, still stock 4 speed. Do you have to cut the trans tunnel at all with the SX gearbox? I don't want to cut it and the idea of a 90§ bent shifter isn't appealing to me. So a SX 5spd swap might be the solution... Link to comment Share on other sites More sharing options...
duffymahoney Posted July 28, 2020 Author Share #626 Posted July 28, 2020 5 hours ago, nomuken said: Digging up this older post. I have a series 1 to, still stock 4 speed. Do you have to cut the trans tunnel at all with the SX gearbox? I don't want to cut it and the idea of a 90§ bent shifter isn't appealing to me. So a SX 5spd swap might be the solution... Zero cutting with the sx swap. 1 Link to comment Share on other sites More sharing options...
duffymahoney Posted August 25, 2020 Author Share #627 Posted August 25, 2020 Well I’m probably a idiot. But I decided to swap my Jenvey throttles bodies out for something a little more vintage/ classic. These are late 70s early 80s SK throttle bodies. They are 47mm that taper to 45. I picked them up off yahoo japan. They have a nice vac balance port on them. I bought two sets off a single seller. Now time to fabricate a single piece fuel rail and find a tps sensor that works. They should match my SK intake nicely. The old SK stuff is so nicely cast. I’m excited! 1 Link to comment Share on other sites More sharing options...
grannyknot Posted August 25, 2020 Share #628 Posted August 25, 2020 Were there any problems with the Jenvey TBs that helped you make the switch? Link to comment Share on other sites More sharing options...
duffymahoney Posted August 29, 2020 Author Share #629 Posted August 29, 2020 My 3.1ish stroker build ran into a small issue. The block will need to be clearanced a little more. The extra long stroked LD crank (84.6) is to blame. The engine can be rotated, and it just barely touches about one time out of three. That’s just the .002” of bearing clearance rocking one way or another. Deck height is within .002” of each other. Andrew Kazanis is a L series wizard. Hopefully when he retires he will build Datsun motors and especially do more head work. 2 Link to comment Share on other sites More sharing options...
wheee! Posted August 29, 2020 Share #630 Posted August 29, 2020 Easy fix... Link to comment Share on other sites More sharing options...
conedodger Posted September 8, 2020 Share #631 Posted September 8, 2020 On 9/7/2019 at 7:21 AM, duffymahoney said: So getting a vac log/ map signal has proved very hard with my manifold. Video Player is loading. Play Video Replay Unmute Current Time 0:19 / Duration 0:19 Loaded: 100.00% 0:19 Stream Type LIVE Seek to live, currently playing liveLIVE Remaining Time -0:00 Playback Rate 1x Chapters Chapters Descriptions descriptions off, selected Captions captions settings, opens captions settings dialog captions off, selected Audio Track Fullscreen This is a modal window. Beginning of dialog window. Escape will cancel and close the window. Text ColorWhite Black Red Green Blue Yellow Magenta CyanTransparencyOpaque Semi-Transparent Background ColorBlack White Red Green Blue Yellow Magenta CyanTransparencyOpaque Semi-Transparent Transparent Window ColorBlack White Red Green Blue Yellow Magenta CyanTransparencyTransparent Semi-Transparent Opaque Font Size 50% 75% 100% 125% 150% 175% 200% 300% 400% Text Edge Style None Raised Depressed Uniform Dropshadow Font Family Proportional Sans-Serif Monospace Sans-Serif Proportional Serif Monospace Serif Casual Script Small Caps Reset restore all settings to the default valuesDone Close Modal Dialog End of dialog window. So I am going to attempt to re tap my BSPT threads to NPT (I have had great success with it actually) Then use these. Video Player is loading. Play Video Replay Unmute Current Time 0:19 / Duration 0:19 Loaded: 100.00% 0:19 Stream Type LIVE Seek to live, currently playing liveLIVE Remaining Time -0:00 Playback Rate 1x Chapters Chapters Descriptions descriptions off, selected Captions captions settings, opens captions settings dialog captions off, selected Audio Track Fullscreen This is a modal window. Beginning of dialog window. Escape will cancel and close the window. Text ColorWhite Black Red Green Blue Yellow Magenta CyanTransparencyOpaque Semi-Transparent Background ColorBlack White Red Green Blue Yellow Magenta CyanTransparencyOpaque Semi-Transparent Transparent Window ColorBlack White Red Green Blue Yellow Magenta CyanTransparencyTransparent Semi-Transparent Opaque Font Size 50% 75% 100% 125% 150% 175% 200% 300% 400% Text Edge Style None Raised Depressed Uniform Dropshadow Font Family Proportional Sans-Serif Monospace Sans-Serif Proportional Serif Monospace Serif Casual Script Small Caps Reset restore all settings to the default valuesDone Close Modal Dialog End of dialog window. https://www.universalpowerconversion.com/miniature-male-branch-tee-hose-barb-brass-p-3356.html https://www.universalpowerconversion.com/miniature-male-branch-tee-hose-barb-brass-p-3368.html So the runners will all have a 1/8 NPT by 1/8 Hose barb T. That way I can connect to a map sensor and also the FPR. Then on the runner with 1/4 NPT, I will use the 1/4 NPT by 1/8 hose barb T, then tap (or soldier) the top flat section to 1/8 NPT by 3/8 Hose barb (3/8 will go to the brake booster). Then I have nice braided vacuum hoses to make the balance tube/ vac log. Should look good and solve all my issues. Duffy, I had a similar problem getting a vacuum signal I could use on a Porsche I own. All those throttle plates opening at once creates a heck of an atmospheric drop. I ended up using a mig tip to mitigate the vacuum drop. It wasn't heavenly, but it made it more tuneable. For reference, this is what a MIG welding tip looks like. It's simply an obstruction with a small hole in to modulate changes in vacuum, and anything could be used (aluminum rod with a drilled hole, a carb jet, a drilled plastic BB, etc). In a way, it introduces a 'lag' or slowdown of changes in vacuum, so you get a sort of averaging effect. Much better than having the MAP sensor report every peak and valley in the signal, and having the FI trying to keep up with that. 1 Link to comment Share on other sites More sharing options...
conedodger Posted September 13, 2020 Share #632 Posted September 13, 2020 Another thought @duffymahoney. What about using MAF instead of MAP? Or TPS? Link to comment Share on other sites More sharing options...
duffymahoney Posted September 13, 2020 Author Share #633 Posted September 13, 2020 Maf doesn’t work with ITB. If i used a intake box it would. I will use tps for most load tables. Link to comment Share on other sites More sharing options...
conedodger Posted September 13, 2020 Share #634 Posted September 13, 2020 (edited) I just assumed you were going to use one of those carbon fiber airboxes with a MAF like mine that will give you IAT and such. But TPS works... Edited September 13, 2020 by conedodger Link to comment Share on other sites More sharing options...
duffymahoney Posted September 13, 2020 Author Share #635 Posted September 13, 2020 No. I plan on some sort of stack filters. Maybe someday something like this 1 Link to comment Share on other sites More sharing options...
AK260 Posted September 14, 2020 Share #636 Posted September 14, 2020 No. I plan on some sort of stack filters. Maybe someday something like this Those beautiful and expensive DCOEs are being suffocated with that airbox. Even with my SUs on a modified engine, I can see the defects of / proven that the airbox is very restrictive. What@conedodger put up is the way forward IMHO. Combine that with some piping through the rad panel and a filter in front of the rad pulling in cold air and you should see a few more ponies too! Link to comment Share on other sites More sharing options...
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