Charlie69 Posted February 24, 2014 Report Share Posted February 24, 2014 I picked up an 89 Harbody Z24 with throttle body injection. It came with the with the throttle body & the intake.. I have a 86 kingcab with a wore out carbureted Z24. My questions are: Is there a difference in the compression ratios of these two motors? If so, is it enough of a difference to where it would not be a good Idea to carburate the injected motor? This is my DD. Is there a lot of parts I would need to locate to setup the TBI motor in my 86 kingcab? I know absolutely nothing abou TBI. Quote Link to comment
ggzilla Posted February 24, 2014 Report Share Posted February 24, 2014 What you should know about the TBI is that it is more reliable, smoother, fuel efficient and more powerful. Get a 720 repair manual and read up. The library has a copy. Quote Link to comment
datzenmike Posted February 24, 2014 Report Share Posted February 24, 2014 Throttle body Z24s are called a Z24i. You would need all the EFI wiring from the Hardbody and somehow put it in the 720. Or get the wiring harness from a EFI 720.... they did come with a similar setup from April '85 through mid '86 when the Hardbody came out. You will need any EFI sensors such as the O2 sender and exhaust manifold to hold it. And a high pressure fuel pump. Perhaps swap the tank from a Z24i 720??? Quote Link to comment
ggzilla Posted February 24, 2014 Report Share Posted February 24, 2014 good Idea to carburate the injected motor? Not a great idea. But if its broken it may be cheaper to swap the carb over. Also need to swap distributors as the Z24I uses an EFI distributor. Quote Link to comment
datzenmike Posted February 24, 2014 Report Share Posted February 24, 2014 My '84 Z24 motor is actually from a Hardbody. Unknown to me it was previously swapped over to carb and I found the wrecking yard crayon on the flexplate when I pulled it. Quote Link to comment
heretic Posted February 24, 2014 Report Share Posted February 24, 2014 If you want to stay carbureted you'll have no issues using a Z24i long block with all of your Z24s accessories, ie: intake, exhaust, distributor.. etc... its the same basic engine. carbed TBI motor ..... Farmers 620 http://community.ratsun.net/topic/3811-my-77-kingcab-620-ka-swap-running/page-20 There is a dude on here with a carbed VG30 510 also. Quote Link to comment
heretic Posted February 24, 2014 Report Share Posted February 24, 2014 I'm sure there is absolutely nothing special with the internal workings of either of these engines to run a carb. http://community.ratsun.net/topic/15979-carbed-vg30e-2door/page-2 http://community.ratsun.net/topic/51922-four-door-dimes/page-5 Quote Link to comment
datzenmike Posted February 24, 2014 Report Share Posted February 24, 2014 You need a matchbox dizzy as the CAS won't fire without the EFI working. They are available in Saudi Arabia VG30s... or have one machined to fit. Quote Link to comment
ggzilla Posted February 24, 2014 Report Share Posted February 24, 2014 Or you could use the distributor from a 720 with carbed Z24. Use the matching coils, wiring harness and ECU (if the carb came with an ECU). Quote Link to comment
Charlie69 Posted February 25, 2014 Author Report Share Posted February 25, 2014 CAS is that the crank positioning sensor? Guys I do appreciate your time and information. I spent several hours on the internet trying to answer these questions before posting. The libraries here in Phoenix dumped all the repair manuals years ago, now for a fee you can look at online manuals for a specific make year and model vehicle. Quote Link to comment
ggzilla Posted February 25, 2014 Report Share Posted February 25, 2014 CAS is crank angle sensor. Z24I has a CPS built into the distributor (Cam position sensor). On the interwebz people mix the terms. In any case it is not a separately replaceable sensor like on some engines. Try the county or state library system if Phoenix doesn't have one. It does not need up be a make/model/year manual, a Chiltons 1980-1989 Foreign reference manual will cover it too. Or get one for $10 on eBay or amazon. Quote Link to comment
datzenmike Posted February 25, 2014 Report Share Posted February 25, 2014 The '86 FSM I have describes the Z24i as having a CAS with the photoelectric cell and degree wheel. #22100-07G00, same as used on the 720 Z24i. Cam Angle Sensor is more for signaling which cylinder gets the injector signal but not needed on throttle body injection. Also the Crank Angle Sensor gives 360 degree and four 90 degree reference signals including a TDC #1 so RPMs and extremely precise engine timing control can be computed. 1 Quote Link to comment
Charlie69 Posted February 25, 2014 Author Report Share Posted February 25, 2014 I have been watching ebay for factory service manuals but they are running high priced. With the info you all have provided I think I will go ahead and run the Z24 I carberated and rebuild the original block and set it up for the TBI. I need to get my DD on the road ASAP. Thank you again for all the info. All the libraries here have gone electronic for car repair. Quote Link to comment
Charlie69 Posted March 10, 2014 Author Report Share Posted March 10, 2014 I now have a 1987 D21 2wd automatic transmission, shifter, trans control box, ecu, and a wiring harness that is missing engine wiring and is cut where it goes through the floor to the tank fuel pump and the tail lights. Was there a lot of change for the engine throttle body controls from the 87 harness to the 89 harness. I found an 1987 FSM online for $143 plus shipping but this is out of my price range. Quote Link to comment
datzenmike Posted March 10, 2014 Report Share Posted March 10, 2014 Try places like the Salvation Army, antique and thrift stores and pawn shops. I find they usually have a books section and there are always auto repair manuals. I wouldn't pay more than $20 for an authentic FSM and only a few for a Haynes. I would imagine most of the engine controls were the same up to '89, the last year for the Z24i. Any changes would be emissions related like the specs or settings. Quote Link to comment
Charlie69 Posted March 10, 2014 Author Report Share Posted March 10, 2014 Thank you Mike, you are always very helpful. Quote Link to comment
datzenmike Posted March 10, 2014 Report Share Posted March 10, 2014 That would do, certainly for the price, but I don't think it's the actual Nissan FSM. I have an '86 first year FSM and totally different. They go by year only and not by model covering all years. Quote Link to comment
Charlie69 Posted March 10, 2014 Author Report Share Posted March 10, 2014 Thank you Heretic, I have the 89 in PDF format it is the 87 that I need and Mike you are correct that is not the Nissan Factory Service Manual. After buying my first FSM for my 521 I had in the 1980's nothing compares. I am hooked on OEM manuals. Quote Link to comment
Robert Posted March 12, 2014 Report Share Posted March 12, 2014 I have it on disc.....what exactly are you tryin gto do? What info are you looking for? Quote Link to comment
Charlie69 Posted May 8, 2014 Author Report Share Posted May 8, 2014 I am looking to purchase the 89 d21 hardbody manual on disc. Quote Link to comment
Charlie69 Posted July 15, 2014 Author Report Share Posted July 15, 2014 Bought one thank you. Quote Link to comment
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