[tegstar83]

Hey all I was wondering if its possible to fit the K24 crank into the K20A2 thus effectively making it a 2.4 ltr and then not need the hassel of changing heads?

 

[randyrm1]

i don't think you can the k24 uses a strock'd crank. so if you install that into a k20 your pistons would hit the head and try to push through it.

 

[tegstar83]

isn the whole point of a k24 having more torque is for the bigger bore??

 

[jon v]

isn the whole point of a k24 having more torque is for the bigger bore??

most of it comes from teh crank...

teh K20 is 86mm correct? the K24 is 99mm...

the bore is just slightly bigger.

I don't think you can fit the 2.4 crank in the 2.0 block but I could be wrong. I think somebody asked Ron that a while ago. If I remember correctly he said no. I think the rods would hit the bottom of the sleeves or soemthing...

 

[tegstar83]

looks like im gonna have to be sorting a k24 block outa the TSX,
what am I gonna be looking at making outa this engine with a k20a2 head slapped on High comp pistons ect I wanna know what tq no and horse power Is it realistic to make 350 NA whp on 98 octaine gas??

 

[tegstar83]

also shoul i bore it out a bit more to like 89-90mm?? I dont care if im not reving to 8.5k I was used to reving only to 7k in the teg so if im reving to 7.5k or 8k its all good

 

[1BadRSX-S]

You can use a K24 crank in a K20, but you'll need some machine work. I'll be using this set up in my 90mm x 102mm race motor. I've spoken with Ron about it a few times and made threads on this build.

 

[1BadRSX-S]

looks like im gonna have to be sorting a k24 block outa the TSX,
what am I gonna be looking at making outa this engine with a k20a2 head slapped on High comp pistons ect I wanna know what tq no and horse power Is it realistic to make 350 NA whp on 98 octaine gas??

I honestly dont think you can make 350 HP NA on 98 octane. Maybe I'm wrong.

 

[jon v]

You can use a K24 crank in a K20, but you'll need some machine work. I'll be using this set up in my 90mm x 102mm race motor. I've spoken with Ron about it a few times and made threads on this build.

what kind of machine work?

 

[tegstar83]

this motor ur building is it going to be a realiable motor?
Isnt that 102mm bore something huge?
Is this running on race fuel? And while im at it what are u gonna be putting down in terms of power and tq roughly and what are u gonna be reving 2?
One last thing how far into the build are ya?
thanks

 

[tegstar83]

ohh yeah forgot to ask what is the bennifit of putting this crank in there, rather than working the K24??

 

[jon v]

this motor ur building is it going to be a realiable motor?
Isnt that 102mm bore something huge?
Is this running on race fuel? And while im at it what are u gonna be putting down in terms of power and tq roughly and what are u gonna be reving 2?
One last thing how far into the build are ya?
thanks

he means 90mm bore and 102mm stroke. So that is actually a destroked K24 crank in a bored out K20 block...

built right and treated right it could be reliable. I mean it is almost square, it just depends on what you use it for and what kind of tuning and compression you are running...

 

[1BadRSX-S]

I already have the motor and the TSX K24 crank cost $800 new from Acura. I'm building the motor for my drag car. I'm not far into the build on the motor other than buying and researching parts. I've spent most of my time into the body and chassis. The block will be bored out from the 86mm to 90mm and sleeved of course. The crank will be knife edged and possible machine work on the journals for larger bearings. I plan on using custom CP 14.1 pistons and Cunningham TI rods. As for HP who really knows, of course 300 is the mark everyone is trying to get over. For now, VP C116 and VP C119 will probably be the fuel. Largest displacement in the NHRA Allmotor class is 2600 and the bore and stroke combonation that I will run will net 2595.

 

[jon v]

So is teh 2.0 block just because thats what you have? would there be any benefits over the 2.4 block?

 

[1BadRSX-S]

Well 90mm x 102mm is 2595 displacement. 2600 is most allowed in Allmotor class. You can use either block with this bore and stroke combo. So I'm not sure wether you would gain anything more by using the K24. You might have a bit more thickness between cylinder walls. Now that I think about, even though its the same bore and stroke you might see a bit more TQ. Not sure. Not sure either how oil and water flows through the block and if there would be something to gain there either. Its just what I got so why not use it.

 

[jon v]

Well 90mm x 102mm is 2595 displacement. 2600 is most allowed in Allmotor class. You can use either block with this bore and stroke combo. So I'm not sure wether you would gain anything more by using the K24. You might have a bit more thickness between cylinder walls. Now that I think about, even though its the same bore and stroke you might see a bit more TQ. Not sure. Not sure either how oil and water flows through the block and if there would be something to gain there either. Its just what I got so why not use it.

maybe Ron has some insight on this?

 

[- guest -]

Rod angularity would favor the K24 block slightly, since you can run a longer rod. In a drag application, use whatever resources you have plentiful abundance of. Either would work very well for the intended application. Bore centers are identical, so no advantage with regards to cylinder wall thickness between the two blocks at 90mm bore. They'll both have gasket seal issues to contend with over time.

-Ron

 

[jon v]

how about oil and coolant flow between the 2?

have you noticed anything that may yield a better road racing or long term usage motor?

 

[- guest -]

For any form of serious racing, I would dry sump either block.

-Ron

 

[1BadRSX-S]

Rod angularity would favor the K24 block slightly, since you can run a longer rod. In a drag application, use whatever resources you have plentiful abundance of. Either would work very well for the intended application. Bore centers are identical, so no advantage with regards to cylinder wall thickness between the two blocks at 90mm bore. They'll both have gasket seal issues to contend with over time.

-Ron

Thanks for the info on the cylinder wall thinkness Ron. It was just a guess of mine. Something that you mentioned but at the time I didnt know how to describe or say it without look'n like an ass was the "rod angularity". Thanks for clearing that up for me. :up: