this is some of the stuff i'm finding as i fiddle around with the (2) 7k's i got recently.

 

the best thing, (i haven't seen anyone post about this yet).

they have a fully counter balanced crank. TRD k cranks were romured to be fully counter balanced, but i've never seen one.

 

the conrods are 7afe and with a pressed 20mm pin.

 

the oil pump pick up is steel,(good uprite engines where you have to change the pick up)

 

the combustion chamber has been opened up and the ports have a better shape.

 

the sump is deeper, but not by much.

 

i'll post more as i find it.

What do these 7K engines come out of, vehicle wise?

Sloth Snr will love this one!

 

I'm still saying as Sloth and I said at the Vic BBQ Day... it's still a bored out 4K :D hahaha

Yeah nice info. My dad will be really interested to read it.

 

Our 7k will be a little different though, it has had the ports polished, the lifters replaced (with v8 chevy solid lifters), and (i think) the cam might have been replaced (if not replaced it was cleaned up a heap). The sump on the 7k's does go a bit lower and doesn't fit into a KE55 or KE35, so our 7K has a 3K sump (i think).

 

The motors have a lot of torque and are a lot of fun ;)

 

My dad will definately be interested to hear this.

 

Check out these two posts about our 7K (if you haven't already):

http://www.rollaclub.com/board/index.php?showtopic=6775 - Our 7k

http://www.rollaclub.com/board/index.php?showtopic=5618 - Things Are Happening

 

Well i better get going, have to go for a drive :D

This is why I was so keen to do a 7K.

The difference in the strength of the 7k bottom end

saved us a lot of time and money that we were able

to put in the heads which Toyota neglected to improve

very much over the 4K head

As this states in the title... interesting :D

 

Gotta see this on the cruise ;) PLEASE say it's gonna make a show!

Hmm, that 20mm pin is asking for a blower :D They're a sturdier motor than I thought.

4age pistons are screaming to fit into a 7k, yo ?

I'm very pleased with all the 7K action ;)

 

nice info Chris :D

more info.

 

the conrods with location dowels, i wonder if 7afe's have this?

also have yield strength conrods bolts, for those who don't know, you can only torque these once before you have to replace them, they work on bolt stretch and not torque.

 

the pistons have very little oil relief, hard to see in the picture, but there's only 2 holes, this could cause problems in the future with oil burning.

 

the block has steam holes that i don't think i've ever seen in any other K engine.

 

 

looking into the block you can see the cut outs for the conrod's to clear, and they don't clear by much.

 

i'm sure there's still more to be discovered.

Very interesting....

 

Keep more coming as you find it! :)

will do, i'm sure there's more. :)