All Activity

03-23-2025 TURBO PROJECT UPDATE: here are float bowls for the Mikuni HSR carb for my turbo setup. You can see the difference between an unmodified one and the modified one on the left. the overflow tube, look how much larger diameter it is, and the upper right-hand corner of the float bowl is modified, to increase flow for the accelerator pump, advertised as 50% more fuel flow! I had so many problems with my mikuni that I ordered a china copy off of Amazon for $113 shipped to learn about the carb......when it arrived it is EXACTLY the same carb! Some of the knockoffs are not similar, but this is a carbon copy. My mikuni I am convinced is a factory defect. I went ahead and changed all the jets in the china carb to mikuni jets, and put the modified float bowl on there. It is now "correct" and ready to go on!

well, the fun of driving the Z car will go WAY down if you keep an auto trans instead of a manual. I have had both. Manual all the way. At least for a Z car....muscle car would be different.

Going auto 700r4 might be easier. The JTR book explains it. Done by many members here so there is lots of data.

Buy this book first There are a lot of details about the 240Z V8 auto to manual conversion you need to know before you start the project. Purchase and read the JTR V8 conversion manual. You can buy it here: https://jagsthatrun.com/collections/jtr-v8-conversion-manuals/products/copy-of-v-8-conversion-manual-for-volvo-200-series

1989 Camaro T5 mated to SBC 350 Basics 1. T5 transmission: The 1989 WC T5 transmission is tilted 15 degrees towards the driver. The 15 deg tilt is absolutely no problem, I have done two just cut away the trans tunnel as in the picture below. The tilt is not noticeable once center console is installed. Unless you want to make a special transmission mount, you will need an 89 Camaro T5 bell housing, driveshaft, flywheel, clutch pressure plate/disk, throw out arm, throw out bearing, clutch slave and a 7/8" clutch MC. Note that there is a V8 and a V6 version of the T5 transmission. They have different spline counts. You will need the V8 version. 2. Bell Housing: 1989 -90 bell housing for V8. Verify that the pivot ball is in place as that part is NLA. 3. Flywheel: 158 tooth flywheel: https://www.summitracing.com/parts/zzz-50-6516 4. Clutch Kit: Zoom High Performance Clutch Kits HP1675-1A https://www.summitracing.com/parts/zzz-hp1675-1a/applications/ 5. Clutch Hydraulic Components: Camaro Clutch Slave: Napa sells the Camaro clutch slave. https://www.napaonline.com/p/NCF73110 Clutch Master Cylinder: Both Tilton and Wilwood make 7/8in. clutch master cylinders. The Wilwood unit is more compact allowing use of a larger brake booster. Tilton 74-875U: https://www.summitracing.com/parts/til-74-875u Wilwood 260-10374: https://www.summitracing.com/parts/wil-260-10374 6. Clutch Hose and Fittings: Hose: -3 A/N SS hose. Length TBD Roll pin to A/N SS line adaptor Russell 640281 (connects -3 A/N SS line to the Camaro slave): https://www.summitracing.com/parts/rus-640281 MC A/N SS -3 A/N line to 1/8in NPT adaptor Earls 961603ERL (connects -3 line to the MC): https://www.summitracing.com/parts/ear-961603erl 6. Starter: Hitachi gear reduction starter or similar unit. 7. Complete 240z brake and clutch peddle assembly swap. 8 MSA/JTR transmission mount See my post of 12 June 18 second post down lots of pictures

Ok, if I were going to get a T-56, what components would I need, like clutch, mounts, bellhousing, etc. This will be my first time doing a swap like this.

You can get a T-56 to fit in an S30 with some work, so you can pick basically whatever Chevrolet manual trans you want.

So I have a chevy 1998 V8 4 bolt 350 small block with a carburetor. Currently I have a 3 speed automatic and I'm not sure what transmission it is, but I want to swap into a manual. I just want to daily and be able to drive on highways. What are the manual transmissions I can use to fit into my 1972 240z?

So I currently have a Chevy 350 small block 1998 4 bolt vortec motor with a carburetor. I bought the 240z like this with 3 speed automatic transmission. I am not sure what transmission it is, but I've had the car for a year and I'm ready for a manual transmission swap. I just want to be able to daily drive the car and be able go on the highway. What manual transmission will be able to fit in the Z. I've seen other forums, but they don't have the information I need. This is going to be my first transmission swap. Thank you.

Little update on this project. I daily drove this car to school all fall until I eventually blew the stock headgasket. I just needed to adjust the megasquirt pots to calibrate the ecu. Car sat most of the winter due to school work and 2 head bolts breaking when doing headgasket. Was easier to just pick up another n42 block, with good rings, hopefully no more oil burn. Looking forward to throwing in 440cc supra injectors with my 2mm kameari head gasket to turn the boost up. Hoping to just continue to clean up the bay this summer, and to start doing bodywork and rewrapping parts of the car.

Clogged exhaust system comes to mind also. Especially if it has a catalytic converter.

Gonna have to use the internet for that one then.

local dealer here told me that they were no longer available

Looks like those might be it but no sizes are listed . I have not heard of this vendor before.

Check the banjo filters where the fuel enters the float bowls. Then I'd do a fuel pressure and volume test. The symptoms all relate to a lack of fuel.

Yep, I bought a few.

Okay - you would think they are the same . Were you able to specify sizes ?

I was told the subaru shims are identical, i bought from the local dealer.

Looks like they might be available in Japan. https://www.carpartsmanual.com/datsun/Z-1969-1978/power-train/differential-gear/r180 https://www.google.com/search?q=38154-78501&rlz=1C1SQJL_enUS862US862&sourceid=chrome&ie=UTF-8 https://www.amazon.co.jp/NISSAN-ニッサン-日産純正部品-ADJUST-38154-78501/dp/B091Z23WNM

I am trying to find a source for shims that fit under the rear bearing . I want to change the depth of the pinion but can’t seem to find shims .

There's some good information in this old thread -

I fought with this for a couple years on my 280zx. I replaced fuel injectors, put a header on (pain in the ass). I wanted to make something out of that 6cyl...Did this and that with very little improvement. Don't think your really going to get more than 15hp more. Your just going to have to V8 swap it!!

So I’ve been gathering info in adding megasquirt to my stock non turbo 1983 280zx. Hoping to get more horsepower. Many mixed answers on forums. I’ve left a message at Godzillaracing regarding megasquirt a week ago for some info. Without wanting to ADD a turbo route would megasquirt do the trick or should i …..clean/replace fuel injectors,check on fuel pressure-add a guage, retard timing a bit or? Car only has 30k orig miles. Was sitting for 15 yrs. Now on road for few years. Thanks

Probably worth your time to study up on how the SU's work. They're not your Dad's Buick's carburetor. Air flow is controlled by vacuum. Seems like your "suction pistons" might not be rising fully, choking off air flow. This from the 1973 Engine Fuel chapter -

Well I decided to pick a new header. I wanted the header to give my room on port 5-6 for my lower mounted actuator and also get out of the way of the throttle bodies a little more. I decided on the Kameari drag 45mm. Which I purchased through Binh Nguyen. The header design gives me plenty of clearance for my actuator and throttles! Pretty darn happy with it overall. Prior I had a now moth balled Fujitsubo header. Which had a terrible runner design for a lower actuator.