briann510 Posted December 7, 2006 Share Posted December 7, 2006 I dont go to pick and pulls, so thats why I dont find them...LOL Quote Link to comment Share on other sites More sharing options...
MOTORHEAD427 Posted December 7, 2006 Author Share Posted December 7, 2006 In case you haven`t noticed, I don`t know much about gear ratios. My daily driver has been a 98 LS1 Z-28 for the last 8 years and I love the way it accelerates( 4 speed automatic-I drive it like a manual car though:mrgreen: ) I will get the 280ZX tranny for my 240Z. Question is how do I adjust the gear ratios so that I get a 0-60 under 6 seconds, or is it impossible with an L-24 triple setup like mine?... I don`t know anything about it....All help is appreciated.Thank you... ERIC Quote Link to comment Share on other sites More sharing options...
briann510 Posted December 7, 2006 Share Posted December 7, 2006 I have triples setup and with the 3.55 ratio first gear and drag radials it launces like a rocket. Driving around town it can easily start out in 2nd if not racing someone. My son and I went out and tried some hard launches the other day in 1st against my 11 second Z06 and he kills me on the launches easily by 3+ cars through 1st and 2nd and then I have to chase him down. So for stop light to stop light or runs through 3rd its damn quick and thats why we wanted the 4 speed with the really low 1st gear. Quote Link to comment Share on other sites More sharing options...
MOTORHEAD427 Posted December 7, 2006 Author Share Posted December 7, 2006 Briann510. I checked your website. Thanks but your Z is more like a Pro Street race car. That`s not what I`m after. I want a race car that I can drive on the track,street and freeway.I already have the strut and sway bars. Eibach springs and Tokico`s. The car handles well. Mr Mortensen, could you please tell me more about your Z? Gear ratios, engine, all the specs maybe with pictures of your engine? Thank you very much. ERIC Quote Link to comment Share on other sites More sharing options...
JMortensen Posted December 7, 2006 Share Posted December 7, 2006 I don't have very many pictures of my engine, and it wasn't much to behold. I'm not really about making things look good. My car is a 70 with a L28/E31 head combo. Triples, cam, ported head, etc, puts out about 240whp by some drag racing calculators, but I've never had it on a dyno. You might think of it as Brian's motor's baby brother. Mine is a poor man's engine, his is the real deal. The gear ratios for all the transmissions are in this site that I linked to previously: http://www.geocities.com/z_design_studio/ I have the 80ZX transmission and I had 3.70 gears. They worked well with SU's but when I switched to Mikunis the gears were a big problem. I am now installing 4.11 gears, but that's just one part of a pretty major rebuild that I've been into now for about 3 years. My car has been on a rotisserie for about a year and a half now, and I'm expecting to take it down just in time to move in April or so. Then I can move it and finish the other 970,000 projects I've got going on it. The car was OK before, should be quite a bit faster when its done. I don't expect to drive it for a LONG time yet. I've been into EVERY part of the car, I can't think of anything that is going to be left as it was before I started. Literally nothing on the car will be untouched... As to your earlier 0-60 question, you can't really "adjust" the gear ratios. You can choose ratios, and then build an engine that makes enough power to get you from 0-60 under 6 seconds. I don't think it will be very hard to do, even with an L24. If you were to get the low geared rear and and the ZX transmission and not be able to meet your goal, next step in my opinion would be to put a bigger engine in it. L28 is 15% larger than the L24 I think, so that is a 15% bump in power that you could expect on a similarly built engine. There is a hell of a lot of information about how to buid a hipo NA L series engine on this site. I suggest you search and read some threads, I know you'll find the info you're looking for... Quote Link to comment Share on other sites More sharing options...
briann510 Posted December 7, 2006 Share Posted December 7, 2006 Briann510.I checked your website. Thanks but your Z is more like a Pro Street race car. That`s not what I`m after. I want a race car that I can drive on the track,street and freeway.I already have the strut and sway bars. Eibach springs and Tokico`s. The car handles well. Mr Mortensen, could you please tell me more about your Z? Gear ratios, engine, all the specs maybe with pictures of your engine? Thank you very much. ERIC Our 240z IS driven on the street, 1/4 mile tracks, road racing tracks and also the freeway frequently so im not sure what you thought our car was used for. It has over 10K street driven/street raced miles on it and about 200+ road track miles and alot of freeway driven also with no problems currently with the Rebello racing engine and it does quite well doing all 3 scenerios. So it is ready for track, street or freeway driving/racing depending on our mood. Correct me if I'm wrong but that sounds like to me what you want your car to be able to do correct? Quote Link to comment Share on other sites More sharing options...
MOTORHEAD427 Posted December 7, 2006 Author Share Posted December 7, 2006 Brian.Please don`t get me wrong. After I watched the Infineon 1/4 drag racing video on your website, I`ve had the impression that your Z was a Pro Street race car.My bad... I guess I`m going to end up buying an L28 motor and the 280ZX tranny. Thanks for all the help. PS: Brian your car REALLY looks like a Pro Street dragster...Especially with that cowl hood:-o ) ERIC Quote Link to comment Share on other sites More sharing options...
briann510 Posted December 8, 2006 Share Posted December 8, 2006 No problem Eric. The cars looks are very intimidating for sure as my son likes it that way (the cops pull it over alot also just because it looks not street legal). Its a fun car for sure and within a couple mins of changing tires/rims can be used for different venues. Quote Link to comment Share on other sites More sharing options...
badjuju Posted December 8, 2006 Share Posted December 8, 2006 http://classifieds.hybridz.org/showproduct.php?product=3434&cat=20 howabout a 280z 5 speed? Quote Link to comment Share on other sites More sharing options...
AK-Z Posted December 8, 2006 Share Posted December 8, 2006 Correct me if I'm wrong, but isn't the 280z 5 speed that same ratios as the 4-speed but with an extra gear? Quote Link to comment Share on other sites More sharing options...
briann510 Posted December 9, 2006 Share Posted December 9, 2006 Correct me if I'm wrong, but isn't the 280z 5 speed that same ratios as the 4-speed but with an extra gear? Depending what the car is going to be used for will be the tranny choice for ratios. My son is more into drag racing and stop light to stop light brutal acceleration with large drag radials so the 4 speed was the choice with the really low 1st. even swapping rims/tires its still an excellant road racer also with a top speed still of 125 mph. 1st gear is very low for the 240z 4 speed (3.55) and even lower for the 260z 4 speed and if you have the traction both will get you out of the hole quiker as compared to the 280z 1st gear ratio (3.321). here is a breakdown of ratios for 4 and 5 speeds: 240Z 3.549 2.197 1.42 1.00 '70-'73 260Z 3.592 2.246 1.415 1.00 '74-'78 280Z 3.321 2.077 1.308 1.00 0.864 '75-'79 280ZXa 3.062 1.858 1.308 1.00 0.777 '8/79-'80 280ZXb 3.062 1.858 1.308 1.00 0.745 '81-'83 280ZXT 3.500 2.144 1.375 1.00 0.780 '81-'83 Quote Link to comment Share on other sites More sharing options...
MOTORHEAD427 Posted December 9, 2006 Author Share Posted December 9, 2006 Thanks for the info Brian. Here`s a question:I searched the net but couldn`t really find any reliable info about John Morton`s BRE Z...Does anybody know the exact specs of his 240Z? Gears, carbs etc. I`d love to build a replica of it. ERIC Quote Link to comment Share on other sites More sharing options...
MOTORHEAD427 Posted December 11, 2006 Author Share Posted December 11, 2006 I have started a new thread for the BRE spec Z question. Please post your answers/opinions in that thread, not here. I have all the answers I needed about the 5 speed conversion. The information you guys have provided me with was invaluable. Thank you very much. ERIC Quote Link to comment Share on other sites More sharing options...
Austin240Z Posted February 13, 2007 Share Posted February 13, 2007 Ok, so I just grabbed a 5 speed out of an 83(I think) 280zx 2+2, everything looks really similar to the 4 speed, the one big difference that has me mildly concerned is this. On the 4 speed there are two sensors(if you can call them that) I know that one is the back-up/neutral safety swithc and the other is the "sensor" for the back up lights. One is at the front, and one is near the rear on the extension housing. On the 5 speed there is only one "sensor" and it's at the front. Is this going to cause any problems? I searched around and couldnt find any info and transmissions(gearing and what not) is not my strongest area of expertise can anyone give me some info? Quote Link to comment Share on other sites More sharing options...
Guest TeamNissan Posted February 13, 2007 Share Posted February 13, 2007 Here is a 80' 5 speed with the closer ratio. Its far from you but its pretty light. Shipping wont kill you on it. I'm sure if you offer him 50 bucks for the tranny he will take it. http://cgi.ebay.com/ebaymotors/79-80-81-82-Nissan-280ZX-Complete-Engine-Transmission_W0QQitemZ190081491912QQihZ009QQcategoryZ33615QQssPageNameZWDVWQQrdZ1QQcmdZViewItem Quote Link to comment Share on other sites More sharing options...
driftz240 Posted December 19, 2007 Share Posted December 19, 2007 i have a 240z-t drift car, im running the stock 4spd, i had a 4.36 rear from a r31 skyline r200, and it was a bit too much, i was drifting 4th gear at mid-ohio, i swapped out to a 3.5 gear from a turbo zx, it still waste 1st and 2nd gear , im planning on a 240sx 5spd swap and seeing how it does with the 3.5, might swap back to the 4.36 if it needs it. 4 spd hangs in like a champ. even with 300hp, wouldent put race tires on it thow. Quote Link to comment Share on other sites More sharing options...
75dat280z Posted May 12, 2008 Share Posted May 12, 2008 Did you ever find an answer to the question about the sensors on your four speed versus 5 speed? I am swapping an 82 5 speed for my 75 4 speed and have the same question about the sensors. Quote Link to comment Share on other sites More sharing options...
jDm-FaIrLaDy_Z Posted May 13, 2008 Share Posted May 13, 2008 well if anyone needs a 1977 280z tranny let me kno what do u guys recommend a 75 280z 4spd tranny or a 77 280z tranny let me kno Quote Link to comment Share on other sites More sharing options...
WalterPeck Posted June 10, 2008 Share Posted June 10, 2008 Back from the dead! I figured that this would be better than making a new thread, since I'm going to be doing something similar. I have a 77 280Z with the original 4-speed MT. The previous owner swapped on a 5-speed rear end, for reasons already mentioned in this thread. However, I've decided to swap on a 280ZX 5-speed. A couple of questions, though: 1. Someone mentioned making sure to pull the speedo cable, and I was wondering if this is still applicable since I already have a 5-speed rear end (for purposes of speedometer accuracy) or if it is still just as relevant for that accuracy irregardless of the rear end I am using. 2. Someone brought up two connections present for the 4-speed manual for sensors, has anyone figured out how the single sensor on 280ZX transmissions relates so it can be hooked up properly? I'd hate to have the transmission installed and have the reverse lights come on in neutral, or not at all. Quote Link to comment Share on other sites More sharing options...
WalterPeck Posted June 19, 2008 Share Posted June 19, 2008 Anyone? Quote Link to comment Share on other sites More sharing options...
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