H22 Engine Swap

[juniorlude]

I have a si 4ws 93 prelude. I was wondering if I can swap the H23 with the H22, and still be able to keep my 4ws.

[Rory]

Yep.. sure can

[Qnz92Lude]

yes, friend of mine did the swap and from wha i know he had no complications.

[Preludeshalyn]

why not just swap in the h22 head?

[Rory]

why not just swap in the h22 head?

Hard on rod bearings.
Frankenstin motors have short life because rods and bearings are not torqued to the spec of a Vtec Motor. If you retorque motor to Vtec specs. You should last alot longer.

[juniorlude]

yes, that's what I heard with the frankenstein. I also know that parts for the h22 is generally cheaper and easier to find so i might as well swap the whole thing. Thnx for the feedback, much appreciated.

[Si Speed]

Hard on rod bearings.
Frankenstin motors have short life because rods and bearings are not torqued to the spec of a Vtec Motor. If you retorque motor to Vtec specs. You should last alot longer.

I'm impressed with guy. He really seems to know his stuff. :biggrin:
Rep points for you my brutha.:cool:

[juniorlude]

one more thing...do I need to keep the h23 ecu to run the 4ws, or can i just have the h22 ecu

[Preludeshalyn]

i did not know that... hmmm...

[hotrod]

the 4ws control unit is separate from the ecu. so get your p13 and be done with it.

[Qnz92Lude]

i believe the 4ws ecu is behind the rear passenger seats i think on the right side not to sure.

[juniorlude]

yep, i have that unit, thnx again...

[Qnz92Lude]

no problem, goodluck on the swap

[absntmnd69]

good luck man. post pics and what not when you get done

[98vtec]

Hard on rod bearings.
Frankenstin motors have short life because rods and bearings are not torqued to the spec of a Vtec Motor. If you retorque motor to Vtec specs. You should last alot longer.

most people say its a bad combination of the r/s ratio. The stroke is so long and the rods are shorter than h22 rods, you have to choose your piston wisely.

i have a r/s ratio of 1.51 in my h23vtec motor. Guy i know on HT has an even lower r/s ratio with cast type S pistons and factory shot peened rods revving to 8500 for 2 years. Bearing clearances mean everything.

as far as the torque specs, i have never heard of that before. alot of engines run the same kind of torque specs for similar parts.

[absntmnd69]

a guide on this "reliable" h23 frankenstein would be nice

[Rory]

most people say its a bad combination of the r/s ratio. The stroke is so long and the rods are shorter than h22 rods, you have to choose your piston wisely.

i have a r/s ratio of 1.51 in my h23vtec motor. Guy i know on HT has an even lower r/s ratio with cast type S pistons and factory shot peened rods revving to 8500 for 2 years. Bearing clearances mean everything.

as far as the torque specs, i have never heard of that before. alot of engines run the same kind of torque specs for similar parts.

You right. A/F ratio is always a big thing. But if you gonna change the head on a block. You should get a tune.

All my cars were tuned sooo...

[98vtec]

You right. A/F ratio is always a big thing. But if you gonna change the head on a block. You should get a tune.

All my cars were tuned sooo...

i was talking about rod/stroke ratio

[THE ONE]

wow! 98vtec 1.51 is a little low on r/s don't you think? but it's like what you said. You have choose your pistons very carefully. I remember calculating the r/s of the h22 a LLLLLLOOOOONNNNGGGGGGGGG time ago and I don't remember it being that low. good luck with the build.

[blackline]

H22 Is The Best Motor Out They

[98vtec]

http://i139.photobucket.com/albums/q293/tophersracinglogistics/allmotorh231.jpg

"OEM 95mm H23 crank, OEM shot peened H23 rods, R/S ratio is 1.490, reving to about 8500 rpm for over 2 years with 0 problems"

he has a similar build as i do.