Displacement questions

[deevergote]

Ok, I've got a buncha interesting questions...

1) I read that the F22A crank and pistons can be used in an H22A to up the displacement to 2.3L. Does anyone know anything about this? I got the info from a reliable source, but that's all it said. I'm wondering if it does anything to compression or reliability.

2) If you indeed CAN use the F22A stuff to up compression, then would that same principle work with an H23 block? Would a 2.4L VTEC H22/H23/F22 Frankenstein be possible? Or are the H23 internals just similar to the F22 stuff, resulting in that 2.3L?

3) How big can an H22A be made? I've heard references to 2.6L H22A engines. Would increasing displacement to such an extent be bad for the engine at all (assuming it's done properly, that is)?

4) Finally, would higher displacement engines be better or worse (or make no difference) for boost?


I don't really know too much about displacement, since most of the import guys I know really don't care... "That's just a domestic thing... We care about turrrrbo and nawwwwssss!"

[2point6]

1. the rods and crank from the f22 will work fine in the h22. It does bump the compression up a bit (closer to 11.2/1) when used with stock JDM H22 pistons. Reliability will be affected to a point, but that depends on the rest of the build-up. The rev range will not be able to go as high as a modified H22, but the torque will be increased and "come on" earlier in the rev range.

2. F22 and H23 use the same crank (stroke) and rod length. No benifit in putting f parts in h23 blocks.

3. I have seen a 2.7ltr made out of an H22, but there was little or no reliability. IT was an all out race engine, but it didn't last very long. I personally have had 2 (2.57ltr) called 2.6... but both of them failed right away. The reliable route (for a streetcar is to do what I have done with my set up. Make it a 2.44 ltr.

4. displacement is great for boost... just need to get a turbo that is efficient for the rev range of the new displacement.

[deevergote]

Cool! Thanks for all the info! I was all excited about finding somethging new to learn about, and I'm glad you replied so quickly!

2.44 you say? That's about what I was planning (2.4, anyway)

Here's a buttload more:

What does increasing the displacement require? I know it's usually done when resleeving the block. Would any new internals be necessary?

Any idea on how much it would cost (assuming I have no connections, going on an average amount...)?

Could (or should) a stock engine be raised to 2.44L? If so, what changes would that create? Would low RPM hp.tq be raised or lowered? How about high RPM hp/tq? (in other words, how would my powerband change) Would doing so add any power directly?


I'm sure I'll have a whole lot more in a bit... Thanks for educating me!

[2point6]

Increasing displacement will require resleeving if you plan to go any "reasonable" size larger. Honda offers Factor oversize pistons, but the displacement increase is only .25mm. Not very big. Resleeving needs to be done and I suggest as a minimum to bore the cylinders out to 89mm. You can go bigger, but head gasket sealing issues and cylinder wall distortion become factors at that point. The displacement of an H22 with a stock crank and a 89mm bore comes out to 2257.029ltrs. This can be called a 2.3 since most people round up. Of course, with resleeveing you will need to get a good set of pistons. Plan out your entire build up first before you just jump into anything. Consider wether or not this engine will be used in a FI environment or will it be all motor. this can affect the next stages of the build up... Rods. The average cost of an all motor Block resleeved can run you $2200 to $3000 depending on what is done. If you have the crank altered to get more stroke, plan on it being on the High side of that estimate. I can build you an engine like this, but I would need to know more specifics about what your plan is with the car. Make sure you have a plan first or you will end up wasting money.
A stock engine can be raised to a 2.44 such as mine but it requires all of the above mentioned modifications. Sleeves, pistons, crank work.... etc.

[deevergote]

Ok, cool.
I do plan on going turbo. Either a T3 or T3/T4. I'm still researching both. I'm not too sure exactly how powerful I'm looking to make my car. I want as much power as I can get, while still retaining a fair amount of everyday drivability (reliability, as well as gas mileage).