TSX bottom end Si k20z3 Head is this possible?

[fiji06si13]

Ok lets say I bought a bottom end of a K24 out of a TSX and I use the Head from My Si What kind of power would it be putting out?
I only ask this cause this is what I'm thinking about doing some time down the road.

[K20z3 Civic Si [PHONG]]

Wouldnt it be different? The TSX is a k24 and the Si is a k20.

[fiji06si13]

They are K series blocks you can interchange them.
It's like taking a B20 and putting a type R head on it kinda sorta.

[GALAXY~SI]

probally get the best of both worlds get a Lil low end torque and the high end horse power feels me

but someone more knowedgeable in this will chime in

[pogi666ako]

You'll get some serious torque gain.

[htec17]

same head just better cams and ports

[fiji06si13]

Originally Posted by htec17

same head just better cams and ports

Ok but with my head and k24 bottom end are we looken at 250hp and 190 ftlbs. or what?

[hazeman]

what do the tsx's rev to?

[fiji06si13]

Originally Posted by hazeman

what do the tsx's rev to?

Dosen't matter but it revs to 7000 RPM's I will be using my Si ECU it will rev to 8 g's baby. The bottom end should be able to handle it.

[fa1]

You shouldn't assume, you don't want broken rods, bent valves, etc. 1000 more rpm is a lot of distance for the pistons to travel. I would take it safely and build it up anyways since you have the motor apart.

[fiji06si13]

Originally Posted by fa1

You shouldn't assume, you don't want broken rods, bent valves, etc. 1000 more rpm is a lot of distance for the pistons to travel. I would take it safely and build it up anyways since you have the motor apart.

Are you a K24 specialist if so tell me more I would like to know.
When building a motor I've seen and built LS vtec motor's with stock bottom ends and they reved to 8,000 rpms just fine.
I'm only asking if it is possible. Yes it is wrong of me to assume but hopefully some one on here knows what to do.

[b20eg6hatch]

Normally when you add a different block, then the only real gain is the torque the bigger motor puts down. In most aspects they say to add about 42-45 hp to the stock hp the block puts out, then that will give you a rough estimate of what it will do. The TSX has 205hp and about 164lbs of torque, but they come in at 4500, lower than the Si, so it will help blow the tires off more than they all ready do. So all in all you are looking at a motor that puts out roughly the same figures as the Si. The only real gain will be in the torque which is only about 32ftlbs of torque. Good luck

[fiji06si13]

Originally Posted by b20eg6hatch

Normally when you add a different block, then the only real gain is the torque the bigger motor puts down. In most aspects they say to add about 42-45 hp to the stock hp the block puts out, then that will give you a rough estimate of what it will do. So the TSX has 205hp and about 164lbs of torque, but they come in at 4500, lower than the Si, so it will help blow the tires off more than they all ready do. So all in all you are looking at a motor that puts out roughly the same as the Si, but this equation was originally set up for non-vtec motors. The k24 is already vtec so the only real gain will be in the torque which is only about 32ftlbs of torque. Good luck

Thanx i like the sound of that breaking loose sooner sounds like fun. Here is a thought the K24 out of the 07 CR-V it has less power only 166 hp might be waste but what is your opinion on that bottom end.

[fa1]

Since you just want the block go for the k24a1(crv) like you noted above. It can be bought for relatively cheap and same results as the k24a2(tsx) block. I really suggest you go aftermarket and rebuild the block though. Some great websites to get more info about your swap is www.k20a.org or www.k-series.com

[untouchablesi]

i was planning on doing this sometime in the future

only one problem i like to rev high and the k24 has a much lower compression if im not mistaken

[2007k20z3]

Originally Posted by fiji06si13

Ok lets say I bought a bottom end of a K24 out of a TSX and I use the Head from My Si What kind of power would it be putting out?
I only ask this cause this is what I'm thinking about doing some time down the road.

the civic si and the TSX share the same head so you wouldnt be gaining anything you just be swapping in a tsx motor for low end torque unless you got a great deal on a TSX bottom end then sure go for it but the tsx block and si head swap woulndn't be like the ls/vtec of the previous motor gen the b-series, the heads flow the same on the k20z3 and k24a2

[udumkid]

Originally Posted by fiji06si13

Are you a K24 specialist if so tell me more I would like to know.
When building a motor I've seen and built LS vtec motor's with stock bottom ends and they reved to 8,000 rpms just fine.
I'm only asking if it is possible. Yes it is wrong of me to assume but hopefully some one on here knows what to do.

Then you should know how long you can do this before breaking/streching a connecting rod bolt ....

[soxfan143]

The TSX block is far superior to the CR-V block. If you are going to do this spend the extra money for the TSX. The TSX has higher compression and it has the oil sqiurters in the block to cool the pistons. Which you will need for the added RPM's. Plus the higher compression will give you much more power and tourque. I would also get the 06 TSX cams to go with the block. The combination of the RBC intake manifold along with the cams and the block will kick some serious ass. this is my dream setup. Along with a turbo setup.

[michinsi]

That is exactly what I had planned also. I know people have done K24A2 block/K20A2 head before, or a K24A2 block/K20A head. I'll do some research on other forums. Subscribed.

[xxmstajxx]

hmmmmm............

SO k20z3 top + k20a4 Bottom + Comptech SC + 3" Pulley Upgrade = 300+ HP / ??? TQ