I have two 4k's. One is in my car and the other one makes a nice door stop. They are both running. The one in my car is a 4k but I'm trying to figure out whether or not the other one is a 4k-u which is the japanese model I believe? and I think it has higher compression head? Correct me if I'm wrong.
How can I tell if it is definately a 4k-u or not? It has japanese stickers on which leads me to believe it is a 4k-u.
How to tell difference between 4k and 4k-u
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How to tell difference between 4k and 4k-u
by ollieboy » Sun Jul 16, 2006 6:29 pm
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by Dell'Orto » Sun Jul 16, 2006 6:51 pm
Take the head off and look at the pistons. 4K-U's are dished with a flat head. Its only 8 bolts 
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1990 NA6 MX-5 - because reasons
2018 Ranger - Because workcar
1997 FD3S RX-7 Type R - all brap, all the time
OMG so shiny!
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by Dell'Orto » Sun Jul 16, 2006 6:56 pm
They have a little bit more torque than a standard 4K, but not so much more that its worth the half hour to swap engines 
Swap the heads, then you'll have some fun
dont actually do this, unless you want 15:1 compression or 7:1
Swap the heads, then you'll have some fun
dont actually do this, unless you want 15:1 compression or 7:1
1988 KE70 Wagon - Slowly rusting
1990 NA6 MX-5 - because reasons
2018 Ranger - Because workcar
1997 FD3S RX-7 Type R - all brap, all the time
OMG so shiny!
1990 NA6 MX-5 - because reasons
2018 Ranger - Because workcar
1997 FD3S RX-7 Type R - all brap, all the time
OMG so shiny!
Quint wrote:Not just cock, large cock.
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by RS13 » Sun Jul 16, 2006 7:27 pm
I had a 4K-J out of a KP61, those things are nuts! Totally standard, was much faster than any other 4K I've ever driven, although the only thing I could see different was the emissions gear?
Daily driver: Toyota RunX/Toyota Caldina
Ex: 2x AE101, 5x KP60, KP61, EP71, 3x KE70, KE72, AE70, AE82, 2x TE71, AE90, AE92, ST170, plus 11 Hondas, 12 Nissans, 6 Fords, 4 Mazdas, 3 Mitsis, an Isuzu and a Lada!
Ex: 2x AE101, 5x KP60, KP61, EP71, 3x KE70, KE72, AE70, AE82, 2x TE71, AE90, AE92, ST170, plus 11 Hondas, 12 Nissans, 6 Fords, 4 Mazdas, 3 Mitsis, an Isuzu and a Lada!
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by Snoozin » Fri Jul 21, 2006 2:25 pm
4K-U also came in 2 versions as I understand, the "twin squish" heron head type combustion chamber, and a regular type.
The twin squish I believe is the later type, reputedly the gruntiest 4K with a whopping 74 Toyota-hp.
The twin squish I believe is the later type, reputedly the gruntiest 4K with a whopping 74 Toyota-hp.
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by Mr Revhead » Fri Jul 21, 2006 5:18 pm
whopping 74 Toyota-hp.
thats about 62 real world hp for you n00bs
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by TrouserFxGt » Fri Jul 21, 2006 9:45 pm
Mr Revhead wrote:whopping 74 Toyota-hp.
thats about 62 real world hp for you n00bs
nice
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