whitetiger777

So, I was perusing the maggazine rack looking for some temporary enterainment in the form of tuner mags. I wasn't planning on buying one unless I found one with a S2000 article...Well I found one. In Turbo Maggazine (page 70)there is a step by step (with pics) article on how to turn your F20 engine into a F24 with stock Honda parts. Aparently you use the parts off of a Handa Prelude H22a engine. This procedure was discovered by Gary Castillo, head machanic for the RS*R drift S2000.

Has anyone else read this article? Is this realy fesable? Can anyone find any posible negative effects to doing this?

whitetiger777

Ok, so after reading the article it sounds easy...A little to easy. Aparently you start of with a crank out of a K24 engine. A little grinding is required. You need to grind where the flywheel makes contact, aparently there is a lip there that is used to align the fly wheel on an Integra that the S2000 flywheel dosn't use. Next you need the rods and pistons out of a H22a. The throw of the rods are shorter and the distance between the pin hole and the top of the dome of the piston is much shorter. You need to grind either the rods or the crank to get the H22a rods to fit. They recoment grinding the crant if you plan to go FI in the future other wise you can grind the rods. Aparently there is a little grinding of the block to alow the movement of the new rods, but everything else is plug and play. The article claims that the H22a and the F20 engins both use a fiber reinforced metal (FRM) for the cylinder walls. Aparently FRM is easy to damages, so they say that using after market rings amke fo titanium or chromoly can damage the walls. Under the FRM is a soft metaly so boring out the cylinders can punch through the FRM and eat away at the engine.

Any way this is kind of a summary of the article. I am curious if anyone else has read the article and thinks it doable. If so I might find a short block or an engine that might be having problems and atempt this.

whitetiger777

Numbers that I don't understand.

Rod ratio stock,
1.82:1
After mods
1.44:1
If Prelude Euro-R pisotns are used the compression ratio is bumped to
11.6 to 1

This might soud stupid, but can someone explane these numbers...

Dark

First off, that doesn't seem 'too easy' but thats just my opinion.

Secondly, I would want to keep the forged internal nature similar to what the s2000 already has...so my guess would be buying forged h22a pistons.

Last but not least I'd imagine this setup would require a full EMS since alot of the actual engine is changing (i.e. crank).

Interesting topic though

Luder94

Read here...the guy that built the motor detailed in the magazine chimes in on the thread:

http://honda-tech.com/zerothread/1683773

vtec9

The builder basically says "we'll see" in terms of how strong the components are and how long they will last

mLeach

**** that -> 1.44 RS ratio, no thanks. If I wanted that, I'd drive my 84 ford ranger.