Would putting a bigport 3k head on my stock 3k be worth it? and would it give me much more power?

 

also, how much would it cost to get one reconditioned?

 

thanks, punchy.

Edited April 13, 200917 yr by punchy111

The answer to your question is here:

 

http://www.rollaclub.com/faq/index.php?tit...gh_K_motor#Head

3k-b heads I've seen going for free to $150 but are usually about $80? Not sure on the reco cost of a head, but pretty sure it won't be cheap.

 

My suggestion if you want to make a bit more power is:

 

Buy a 4k or 5k for the same price of sourcing and reconditioning a 3k-b head... maybe even cheaper.

Or, if you want to keep your 3k engine: adapt a weber, give it some cam or an exhaust.

Edited April 13, 200917 yr by seabiscuit

hmmm, that FAQ makes them sound like absolute crap! lol

 

have you ever used one? do they give much power.

 

and yea i am trying to keep it as original as possible.

 

thanks, punchy

The ultimate answer is, as usual, how much do you want to spend.

 

I have a 3K downstairs that has about the same output as a stock 4AG, with 250cc less capacity. I spent a Cecil B DeMille epic amount of money to get it that way, but I built it to be in a certain class.

 

Bigport heads (sorry Seabiscuit, a genuine K-B head is a different animal again...) do make a difference. Small though it may be. That, combined with a set of extractors, maybe a carbie upgrade (I'm a fan of the twin standard down drafts if you can get some...) will see you with a good streetable little car. It won't set the world alight, but it'll be fun. 4K and 5K motors are good upgrades, but if you want to stay 3K, so be it. You have to work with what you've got. :D

 

R

I have a 3K downstairs that has about the same output as a stock 4AG, with 250cc less capacity. I spent a Cecil B DeMille epic amount of money to get it that way, but I built it to be in a certain class.

 

a bit off topic but what class are you running in? nice allusion to Cecil B DeMille

How can you actually tell if you have a bigport head without having to remove the head itself from the engine?

Bigport heads have a big welsh plug on the back of the head. Newer heads have a plate bolted to it.

 

Oni: P1 under 1400cc Production Rally Car. Now P2 1400-1600cc with 2TG goodness. :hammer:

Hi,

As Rob said a REAL K-B big port head is different and better than a normal big port head BUT there rare as and can't get gaskets for them anymore the only gasket I have for one is asbestos and no gasket maker has listings for them. Those K-B heads ran even more compression than a big port head etc.

 

Cameron

Cam, if you happen to have a) a K-B head, and b) a gasket for afore said mentioned head, I know a place in Strathpine that, for a fee, will make you new ones. :hammer: