DuffyMahoney

Gosh it better be more then 260hp. I will eventually dyno test, but we don't have one close to me. I live in a tiny town in Northern Idaho. Its a very clean z, but sadly painted in the 70s- early 80s and the owner danced on the roof. Lol

For you that have been following along. My 3.12L is finally in my car and home. Gosh it looks so good I’m just going to stare at it! Amazing work by Andrew Kazanis! This engine was built and done prior to a shop fire. So it’s been through a lot! I love the contrast of the stock blue block and gold zinc and black. It features. My 3.1L 10.2:1 compression ratio 88.5mm bore. N42 block. Sonic tested. LD crank by marine crankshaft. Crank �Off-set grind to 84.6 stroke�Finish rod journals @ 1.8889" Thrust Finish 1.27”�R & R plugs with threaded plugs�Dynamic Balance�Ion-Plasma nitride, straighten & micro-Micro polish all journals E31 head. Port work by Andrew Kazanis Dsi valves Diameter: 45/36.5mm Length: 118mm, titanium retainers. Isky springs. Bonk cam. Roughly stock exhaust and intake port sizes. Vapor honed inside and out. Rebello JE Eagle pistons and toyota rods 221 CFM flow at .45-.5 lift. Mine is 88.5x88.5x.25x3.14159x 84.6x6 /1000 = 3122cc It is showing off my intake design and Efi throttle bodies as well as a bunch of my small parts.

Thanks for posting, pretty amazing sheet metal work.

They make bronco bodies, and a bunch of people have complained about how crappy they actually are. Fit, overall shape, poor paint etc.. I guess still better then a rusted out junk car.

A fun z video I just was sent. It has my R35 coil bracket on it and has over a 1/4 million views! How cool is that.

Working on PCV again, I am going to try for the exhaust. My basic plan is, valve cover to stock pcv valve, to a catch can, then block to the catch can, catch can to the exhaust.

I really think you should move to an overhead bar.

Linkage is what I am calling the small arms between throttle bodies and the shafts. You need to remove everything connecting each throttle to the overhead bar. Then sync. Then check again once hot. Also blip each throttle, see if they stick or bind once hot. You should have the cable going to a cam on the overhead bar. If that isn't what you are doing, I would highly suggest that route. Setting butterflys is extremely difficult to do perfectly. I would print the 3D file I posted for syncing, then set each off the car. Then put each in an oven to 185 and check each again. Do you have an injector company in your town? Have them checked for flow matching?

How close are they synced now? Are you removing linkage to do that? Are dog bones the exact same lenght?

man, how cool is that!

Have you tried clocking it any? There is an area of the stroke that it won't work in.

I am designing a DBW actuator for this DOHC now!

Its now my least favorite looking DOHC, but it's pretty darn cool technology.

Used ITBS seem to be very rare. HKS, I would stay away from the full chinese DCOE ones. KMS takes the chinese bodies and retrofits them with better butterflies and such. https://en.kms.vankronenburg.nl/products/throttle-bodies/bodies/throttlebody-twin Then there are Jenvy EFI Hardware (probably the best designed out) Throttle blades open the opposite way, tapered bore, better throttle blade angles Borla OER(I would stay away from these) ETC.... A common issue with ITB is when the engine is hot on a hot day, they tend to stick slightly open and having them return to idle doesn't work. I believe the bodies expand and cause pinching, but who knows.

I got my Datsun Z Car Series Oil Sending Unit Relocation / Remote Block done! I have only one for sale now, but more are on order. I am pretty proud of this design. Three outlet remote oil sending unit block. Metal 3D printed out of aluminum to look stock and mimics the 240z, 260z and 280z brake proportioning block design. Block has 3 outlets, all are 1/8 NPT. Comes with a custom length -3AN hose and one 1/8 NPT -3AN fitting and either a 1/8 BSPT or 1/8 NPT for the engine block side of the hose. Stock sending unit on a 240z is BSPT, this will require a NPT sending unit like this. [https://zcardepot.com/products/oil-pressure-gauge-sender-240z-260z-280z-70-77?variant=32184292737137](https://zcardepot.com/products/oil-pressure-gauge-sender-240z-260z-280z-70-77?variant=32184292737137) No sending units come with this order. Pictures of sending units are just for reference. Link: https://www.m2racing.com/shop/p/datsun-z-car-series-oil-sending-unit-relocation-remote-block