What can I do to make my 4k engine more powerfull?

I want about 100hp +/-

To do this you need to talk to superjamie.

 

!!

 

:dance:

do some research, we've gone over this 10 billion times

http://www.superjamie.net/ke25/ is my engine

basically you need cam, headwork, better carburettor

also decent extractors and sports exhaust system.

How long is a piece of string??

sports exhaust system

 

Oh how I love that description. It's so... descriptive!

ok, i'll elaborate.

 

for the power level the original poster was talking, i would keep the exhaust system under 2 inches for a 4k. any bigger and you will just lose low end torque. i would recommend a 1 7/8" system for best all round performance for a high output street engine. find a place that does good work, one that will let you watch. i don't think mandrel bends are really necessary (only a 4k), so long as they use thick wall tubing and know how to use a press bender properly. get them to put a 3 bolt flange on the extractors, you will be a lot happier when it comes to an engine change.

just do what i did, bolt on the first turbo you see, use a blow thru carb, wind up the boost, and have a spare motor at home! :D

 

or you could do it propelry if you want it to be reliable :dry:

nothing wrong with popping 4Ks...cheap as chips

exactly. when it went bang, i just dropped in another

 

not hard at all