robbiemenzies Posted February 18, 2012 Report Share Posted February 18, 2012 hey guys i just got a 1983 corolla ke70 with a 4k engine, and its pretty sluggish i was just wandering if there is any engine mods to make it go a bit better? thanks Quote Link to comment Share on other sites More sharing options...
Willis Posted February 18, 2012 Report Share Posted February 18, 2012 Anything involving the letters 4, A and G. K motors can be worked too. Check the FAQ section and find the thread "How to build a tough K motor" Should answer alot Quote Link to comment Share on other sites More sharing options...
altezzaclub Posted February 18, 2012 Report Share Posted February 18, 2012 (edited) How fast do you want to go? Its only a 1300cc and a very old design, it makes about 60bhp I think, and 130bhp would be a racing version of the motor. The usual mods are cam, carbs, extractors and exhaust. Have the flywheel lightened and get the who thing balanced. If the motor is worn out convert it to a 5K 1500cc, or drop a 5K in if you can find one. The 4AGE will make it go, but there is a lot of work to fit one and they are also getting to be old motors. Here's what we did. If you're happy enough with a down-draught Weber, use one of thoise, get your cam ground & get a new exhaust. http://www.rollaclub...the-girls-ke70/ Edited February 18, 2012 by altezzaclub Quote Link to comment Share on other sites More sharing options...
Jono.C Posted February 18, 2012 Report Share Posted February 18, 2012 Go 5kc, weber and extractors, 98 and advanced timing. Run it for a month in different conditions and go from there. Quote Link to comment Share on other sites More sharing options...
robbiemenzies Posted February 18, 2012 Author Report Share Posted February 18, 2012 i have a 5k head that came with the car, i could get that cleaned up and put on if that going to make a difference. I'm saving at the moment for extractors and exhaust at the moment,ive tried looking around for a carby but not having much luck Quote Link to comment Share on other sites More sharing options...
robbiemenzies Posted February 18, 2012 Author Report Share Posted February 18, 2012 ill check it out thanks heaps Quote Link to comment Share on other sites More sharing options...
altezzaclub Posted February 18, 2012 Report Share Posted February 18, 2012 The 5K head might have the opposite effect and lower the compression. They had one shallow dished piston set (called "O"-dish) and one deep dished set called "D"-dish, depending on the motor you got. The D-dish had a smaller combustion chamber as the burn was in the piston dish, the O-dish had the combustion in the head. However both were for 1500cc running about the same compression ratio as a 1300, so they will be relatively bigger. Someone on here will probably know, but you should just measure the volume & area of the 5K head chamber and work out what ratio you will get. Quote Link to comment Share on other sites More sharing options...
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