hey guys just another quick question,

the 5k i just bought has a 5k head but was once running a 3k bigport head and running a 10.9:1 compression ratio.

the 4age pistons have the valve rececces in them so I'm just wondering weather its worth trying to find a 3k bigport head or just shave the 5k head and do a big port on it.

what are your thoughts??

 

cheers again guys

 

 

 

 

 

Not gunna lie, ill probabaly be putting a few topics up but should be right with most things :)

 

do build 600hp diesel motors for a living :)

Stick with the 5k head and mod that.

What are you going to do with the car?? daily to work? Race it? Weekend warrior?

 

Bigger ports mean more top end and worse lower down, so a well-ported 5K will be better unless you're spending a lot of time over 5500rpm.

 

While you're there, how does a car or ute's diesel stop when you turn the key off?? They have no ignition to kill, so do they have a decompression valve like a truck??

Just port the 5k for 150 I had my ports matched to my sidedraft mani and head planed. They ended up bigger than a 3kbp anyway.

thanks heaps guys. makes sence i guess haha.

 

yea its gunna be a weekend worrior. my daily is a slammed mx73 on bbs rs' :)

 

I'm not to sure to be honest with u altezzaclub. all i do is the truck motors and they also use a fuel shut off solonoid on the fuel pump.

 

not.quite sure how 4 wheel drives and cars do it.

 

thanks guys :)