Ok i am building a k-series EK9. I need to know which type of block is better for running high boost (i am going to do the internals and all.) Which block should i use on a k20a2 type s head:

K24 block
K20a2 block

and

with having high boost which tranny would be best

5 spd
6 spd
or
6 spd LSD

 

ME, PERSONALLY...

Since the K20A2 is already built for semi-high compression (11:1 OEM), I would go with a K24A3, which is 9.5:1. Unless you plan on adding dishtop low compression pistons to compensate for boost... I would go with the K24!1/3/4 setup.

And I would go with a 6 speed LSD setup on the tranny... better straight line and corner traction, and more gears

Here is a pretty cool FAQ thread, with numbers on a lot of motors you may be interested in... check it out... https://honda-tech.com/zerothread/1759092

 

ya but if i go with that K24 block could it handle the boost im looking to do 15-30 pds? which block would be better to push that type of boost?

 

It all depends on what you put inside the block to determine wether it will hold boost....


If you put high compression pistons, and a hundreded shot of nitrous, you are going to pop something REALLY quick.

It is all in your form and function of parts and machine work to get a block prepped for boost.

Forged internals, low compression pistons, forged crank, upgraded head/cams/valves/components.

 

if you're going to build the bottom end, i'd go with the k24. there is no replacement for displacement.

 

People have run high boost on both K20 + K24's and I have never seen a sleeve failure. Obviously the K24 is going to give you more torque but the K20 has the rod stroke ratio better suited for revs. Its really a toss up in my opinion, whatever you can find for cheaper. I have 600+ K20's and K24's, but I have never seen a 10sec K24, LOL!

Trans wise, the 6 speed sucks. Stay away!!! My car eats 6 speed gears for breakfast! The only trans. I have remotely seen stay together with high boost is the base 5 speed. Not to mention the gear ratios are longer making it more ideal for high boost.

Just my .02 cents

 

what k24 blocks bolt up to a k20a2 head? oand which block is the best to use (ill be doing all the internals with low compression and forged parts