love ke70 Posted July 4, 2006 Report Share Posted July 4, 2006 chris or liz, what diff ratio is that running? my 5 speed does 3000 ish at 100 and thats a factory jobbie. maybe someone has changed diff centres on u.. Link to comment Share on other sites More sharing options...
chrisandliz[RL] Posted July 8, 2006 Report Share Posted July 8, 2006 (edited) chris or liz, what diff ratio is that running? my 5 speed does 3000 ish at 100 and thats a factory jobbie. maybe someone has changed diff centres on u.. well thats posable, alots happen to this car considering it is a little hobbit (never being out of the shire of kulamunda). i'm the thrid owner and a nurse had it before me and a old man from the nursing home owned it before her. so i think no one has stuffed around , unless the dorks that fitted the tow bar changed it for them??? :dance: Edited July 8, 2006 by chrisandliz Link to comment Share on other sites More sharing options...
irokin Posted July 9, 2006 Report Share Posted July 9, 2006 Sure you just can't count properly?? :hmm: My 3 speed auto did about 3800rpm on the highway.... You must have like a 4.5 ratio diff or something stupid like that. Link to comment Share on other sites More sharing options...
Tham Posted July 13, 2006 Report Share Posted July 13, 2006 would having a 5-speed get better fuel economy? A 5-speed improves fuel economy only at higher highway speeds, above 70 km/h. The Corolla KE70's 4K is known to be a gas guzzler in Malaysia, particularly the "DX" model, which I have. This model was marketed from 1979 to 1981. In the light of such poor feedback, they came out with the "GL" model in 1982 to 1983. This improved fuel economy by about 3 mpg (about 1 km per liter), but performance suffered, particularly acceleration. I think they made revisions to the carburetor, gearbox and differential ratios. I get 26 to 28 mpg (9 - 10 km/L) on average, 30 mpg (10.5 km/L) at best. In bad traffic jams, the consumption can easily drop below 20 mpg (7 km/L). One can see the fuel meter drooping before your eyes. The 5K is even worse in this regard. In contrast, the A12 engine in the Datsun 1200 /120Y easily gets 35 to 37 mpg (12 - 13 km/L) on average. This is why virtually all the taxi drivers here at that time used this car. Link to comment Share on other sites More sharing options...
bruce Posted July 15, 2006 Report Share Posted July 15, 2006 So how come the 4K chews through the fuel, since its only 1290cc? Is it the Aisan carburettor, and poor head gas flow? Link to comment Share on other sites More sharing options...
chrisandliz[RL] Posted July 16, 2006 Report Share Posted July 16, 2006 Because your engine is out of tune? Because your carby is leaking? Because you have busted fuel hose? Because you drive like a fool? 4Ks should not chew fuel with an Aisan carburettor. As previously stated I have got damn near 700km from a tank in a KE70 on highway cycle sorry to be so lazy, but could tell us your setup?? like diff ratio, carby jets, timing and what not Link to comment Share on other sites More sharing options...
Tham Posted July 16, 2006 Report Share Posted July 16, 2006 4Ks should not chew fuel with an Aisan carburettor. As previously stated I have got damn near 700km from a tank in a KE70 on highway cycle That's really fantastic fuel economy on a 4K. One other user on the Toymods forum also reported a consumption as good as yours. Nobody in Malaysia can achieve anything even close. At 11 km/L at best, this would give on a full tank of 42 liters, 460 km maximum. Link to comment Share on other sites More sharing options...
Hiro Protagonist Posted July 16, 2006 Report Share Posted July 16, 2006 Just filled up the KE55 with Ultimate the other night (she's being babied fuel-wise for a few cycles), she took 42L for just over 510km, for an economy of 8.2L/100km of total city driving (with a lot of pedal-to-the-floor to get up hills), which is comparable to my AE102. Doing a few full fills/empties also helps for gauging how much a tank will can do, as the fuel gauge is stuffed, however in doing so I have come across a new kind of fuel gauge for a KE55........your ears. Due to the tank being directly behind the front seats (and the rear speaker holes are open too I should add), the sound of the fuel sloshing around in the tank is very easy to hear. Go over a big bump and listen to the sloshing will give you a good indication of how much fuel is left in the tank. Works a charm for me Link to comment Share on other sites More sharing options...
Tham Posted July 16, 2006 Report Share Posted July 16, 2006 (edited) So how come the 4K chews through the fuel, since its only 1290cc? Is it the Aisan carburettor, and poor head gas flow? Partly the Aisan carburetor, partly the differential ratio, but more the OHV engine design, I think (though the Datsun's A12 is also OHV but has comparatively much better fuel efficiency). You are probably right with regards to inefficient gas flow in the cylinder head. The Aisan carburetor appear to have faulted design, with very poor mixture atomisation and consequently poor idle, particularly when it gets a bit old. The K-series are all well known gas guzzlers in Malaysia. This was also true of the 7K in the first batch of the Unser recently, despite using fuel injection. This Indian guy who has an office near mine, drives an Unser, and the first thing he commented when I asked him about it, was "....... It's quite a gas guzzler". Toyota engines, whether OHV or OHC designs, have never had a good reputation for fuel economy in Malaysia. That's why one doesn't find any taxi drivers here using Toyotas, apart from a few Crown diesels in the 80s. One of the worst in terms of fuel consumption was the 2T and 3T. This was a bit surprising, since I had the impression that the hemispherical combustion chamber design for an OHV engine was quite innovative and advanced for its time, and thus was supposed to be fuel efficient. Edited July 16, 2006 by Tham Link to comment Share on other sites More sharing options...
lappy Posted July 17, 2006 Report Share Posted July 17, 2006 i think a bit of maintanence is in order if a K series motor is using heaps of fuel Link to comment Share on other sites More sharing options...
Josho Posted July 17, 2006 Report Share Posted July 17, 2006 I get around 10L/100km on highways... with the standard diff and 4 speed I'm sitting on around 4500rpm. And my weber is fairly out of tune, haven't had a chance to really tune it since I put it on. I'd love to see what difference a 5 speed would make. Link to comment Share on other sites More sharing options...
chrisandliz[RL] Posted July 17, 2006 Report Share Posted July 17, 2006 well i am getting closer to 10L/100km now, coz i put a diffrent engine in and put a ke20 carby on it I kitted it up and i change the secondary chock to a 25mm from a 24mm and from 168 jet to 152 and left the primary standard choke in and i swaped the jet from 112 to 102. i did this coz the exhort always smelled fuely and the choke not on. i got the jets from my ke70 carby and the donor secondary choke. Link to comment Share on other sites More sharing options...
Tham Posted July 18, 2006 Report Share Posted July 18, 2006 You guys complaining about bad fuel efficiency have never heard of kitting your carby and tuning your engines have you? A well tuned K series would have to be one of the most economical petrol engines in its class Hi Nick, Kitting the carby ..... you mean servicing it with a repair kit and/or downsizing the primary and secondary jets ? Thanks. (By the way, seems to be some bugs displaying the pages here in Seamonkey/Mozilla. The thread starter's first message is displayed on the top of every subsequent page. Or is this supposed to be a feature ?) Link to comment Share on other sites More sharing options...
Felix Posted July 18, 2006 Report Share Posted July 18, 2006 Why would you downsize the jets? no need depends, factory jetting is not always the best. i have found the aisans run rich also. i did the exact same thing to the aisan on the ke16 about 6 months back. that was with a 3k carb on a stock 4k. it improved economy, responsiveness and overall power. experimentation is the key. :jamie: Link to comment Share on other sites More sharing options...
chrisandliz[RL] Posted July 18, 2006 Report Share Posted July 18, 2006 experimentation is the key. :jamie: "story time" the first time i put the carby on it ran like a auto (would not go unless you realy gave it to her) so i was realy down hearted. but the problem was a little catch that stopped the secondary from opening. pulled it off and "good as gold" Link to comment Share on other sites More sharing options...
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