mutley-60 Posted July 19, 2012 Report Share Posted July 19, 2012 hi guys , i have a MANUAL 5SPEED 1990 sx seca 1.6 AE 93 4A-GE with axle-642 trans C52 tires are 185/60R14, My issue is that the motor is revving at 3400 while at 100kph, sounds like it is way too high. i have a mate with a 4door hatch corolla with the same engine and axle /trans codes but with 195/50R15 tires and his car rus 3000RPM at 100kph i have made a comparison of the two tire sizes on a tire calculator and there is a minute difference in tire diameter so the revs should be the same. when i bought the car the guy said it was not the original motor, but it is a 4A-GE engine however he did not mention the gearbox does anybody have an idea what might be going on?? is there another gearbox out of another model that has different ratios that may have been fitted??? any help will be appreciated, thanks cheers mark 0403987379 Quote Link to comment Share on other sites More sharing options...
Twincam16seca Posted July 19, 2012 Report Share Posted July 19, 2012 i have an ae82 twincam seca & that sits about the same rpm, so the ratios maybe a bit different and the box may have been swaped over at sdome point as they bolt up. Quote Link to comment Share on other sites More sharing options...
Subaru_kid Posted July 20, 2012 Report Share Posted July 20, 2012 Same story, still does 6.3L/100km on the freeway... problem? Quote Link to comment Share on other sites More sharing options...
altezzaclub Posted July 20, 2012 Report Share Posted July 20, 2012 Jack up one front wheel and turn the motor with a spanner until you've turn the wheel exactly half a turn. Then do the same to his and see if he gets the same engine turns. That will give you the two overall ratios, there may be differences in either the diff or the gearbox. Youy could try 4th on both cars if they all use 1:1 4th, that will give you the diff ratios. With one wheel on the ground the one in the air will turn twice as fast... I get 3300rpm in 5th in the KE70 on 14" tyres, and they made a big difference over the 13". Might pay to measure the distance each tyre travels over one rev, rather than usng the tyre calculator. Quote Link to comment Share on other sites More sharing options...
mutley-60 Posted July 21, 2012 Author Report Share Posted July 21, 2012 hi guys, thank you,lots of good ideas the car is getting about 10 lltrs per 100k,( same as my 98 camry wagon), it just feels and sounds not happy on the freeway!!! what i will do is put my mates wheels off his car on mine and takei it for a drive then go from there. its just baffiling that the other corolla is doing a flat 3000RPM. go fogure.LOL thank you all very much cheers mark Quote Link to comment Share on other sites More sharing options...
philbey Posted July 21, 2012 Report Share Posted July 21, 2012 Probably just running different diff ratios. Quote Link to comment Share on other sites More sharing options...
droola Posted July 22, 2012 Report Share Posted July 22, 2012 i have exact same spec car as you and thats complely normal, top speed should just be on 190 on a flat road too FYI haha Quote Link to comment Share on other sites More sharing options...
bAKER Posted July 28, 2012 Report Share Posted July 28, 2012 (edited) you seem to be getting bad economy, id be checking the timing. My 4a gets about 7.5L, when she's getting thrashed. Although I have an auto diff in mine so she sits a bit higher, rev wise. Edited July 28, 2012 by bAKER Quote Link to comment Share on other sites More sharing options...
mike100 Posted January 9, 2013 Report Share Posted January 9, 2013 my corolla ae101 runs 4age 20v with c56 5 speed revs same as yours on freeway at 100k 14 inch wheels , sounds fine to me. Quote Link to comment Share on other sites More sharing options...
Subaru_kid Posted January 16, 2013 Report Share Posted January 16, 2013 Check timing with a timing light (don't forget to bridge it when doing this) and get a new O2 sensor. Quote Link to comment Share on other sites More sharing options...
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