Hey I just purchased a ke70 with the 4k engine and 5 speed box. I was wonder what can be done mod wise to the engine for more performance without swapping out the engine for something else.

All you need is here:

 

http://www.rollaclub.com/wiki/index.php?title=Tech:Engine/K_Series/How_to_build_a_tough_K_motor

Thanks I'll have a good read of it.

Stacks on here, it depends on-

-what you want the car for?? Going to work only, blasting around the mountains, drifting at midnight...

 

-what condition is the motor in now? Will it stand extra power and revs or is it worn out?

 

-and how much you are willing to spend?? $2000? $3000?

 

Work on rebore, bearings, balance, lightened flywheel, skimmed head, carbs, porting, cam, extectors, exhaust.. cam chain and tensioners too? a lot of money.

I want it mainly for my daily driver aswell as a weekend cruiser.

 

The 4k is in decent condition for its age. It is a bit tired but still does go alright.

 

I've got 12k to put into it but that's for everything on the car.

Aim to strip it down and have it checked over.

 

Its much easier to put a cam in with the motor out and you'll need the head off for port-matching a carb/inlet system.

 

First, gather the parts you want such as extractors and carbs, whichever sort you go for. I use twin SUs, others have twin DCOE Webers or a single DCOE, or quads off a bike, or the downdraught Weber 32/36. Take a look at the builds with each of those and buy whichever carb and inlet manifold first. You might be able to borrow a spare head to work on or even have it all built up and ready to swap with yours.

 

While the motor is out clean out the rust from the water channels in the block if you're not having it honed or rebored. If you strip it completely and have it in an engineering shop they will acid dip the block to clean it all anyway. If you decide to rebore it, have it sonic tested and go for 1500cc using 5K flat-top pistons.

 

Skm the head as needed to raise the compression, lighten the flywheel and get it all balanced, send the cam off to a cam grinder and then put it all back together again.

 

read all this-

http://www.rollaclub.com/board/topic/42407-the-girls-ke70/

 

and have fun!

Thanks for the help man. I'm new to the Rolla seen (after a long and embarrassing stint with commies) and the help is much appreciated. When I get started I will be putting up a build thread for it.

Edited April 22, 201313 yr by BillisAwesomeKE70

Or even get a spare motor, they should be cheap. Do a 32/36, exhaust and a cam and bank 11k in a long term account :)

K,s love a set of SIDEYS!!!!! AAAAnd the biggest camshft you can find, hehe.....