F2D Thoughts

[highlift]

Hey ppls. I'm considering a F2D for my EG Hatch. Right now I've got a D15B but I'm thinking about more displacement. My issue is that I like to REV and from the dyno charts I've seen, the F doesnt seem to rev higher than 6K.

I was thinking about getting a F22A6 with some high comp pistons, and an appropriate cam. I would prolly build some ITBs versus using a H23 manifold. But with high compression and a big cam, usually RPMs are needed.

The RS ratio isnt terribly fantastic but how high could I rev this engine before thigns go pop. I'm after tons of torque but aint nuttin like pulling 8K on the tach.

Let me know your opinions.

[deevergote]

If you're replacing the internals and valve springs with parts capable of high revs, you can rev the F22A quite high. I believe I've been told by a few members that they've taken stock F22As to 7k with no problems (though I wouldn't). Chances are, the dyno sheets you've seen cut off at 6k because the majority of the powerband lies below that mark.

[Accrdwgnguy]

If you are going to use the D trans, I suggest building the trans as well if you plan on pushing 200 hp or more. A friend of mine has a boosted Civic EX sedan that just blew the trans, and he's putting down maybe 220hp.

[Granite CB7]

How about H/F2B? If you're doing a pretty serious build, a 4.4 FD or shorter would help alot. LoDollar set my rev limiter to 7K on my bolt-on/cammed F22A, it sees 7K fairly often but not all day long by any means. I know Bisi's F w/ the 95 mm crank sees 10.5K I believe, yikes.

[robert@bisimoto]

The D-series trans have bulky gears and are very resilient. The b-series trans has a plethora of aftermarket support. Whichever direction you decide on, Bisimoto designs kits for both swaps. Bisimoto was a pioneer in the F2D (H2D) swaps.

[deevergote]

Robert, do you know how high Bisi revs his engine? Not that it's really a good reference, seeing as it's a fully built race motor (built by a true expert...) but it still shows the extreme capabilities.

The D and B series transmissions are stronger than the F and H series... it's unfortunate that it's not all that reasonable to swap those into the CB chassis. But working with a Civic, you have that advantage!

[wed3k]

Mfactory does a lot for D series.

[highlift]

Thanks for all the replies.

I was planning on using the K20a3 pistons for the increased compression, but was still undecided about the rods. I'd like to make power to about 7800 - 8000. I'm all about the torque so if 180/180 is on the cards then thats definitely what I'm about.

Right now I've got a D15B and my wife is buying me a Mfactory gearset for Christmas so thats why I wanna stay with the D. Plus, the D is a decent enough box for the power levels this car will see and they are pretty cheap to begin with.

I wonder what Bisi would charge for a stroker for a rev happier motor. The ability to rev to 8500 or 9 with this displacement and a crazy cam would be a K killer for sure.

[robert@bisimoto]

Robert, do you know how high Bisi revs his engine? Not that it's really a good reference, seeing as it's a fully built race motor (built by a true expert...) but it still shows the extreme capabilities.

The D and B series transmissions are stronger than the F and H series... it's unfortunate that it's not all that reasonable to swap those into the CB chassis. But working with a Civic, you have that advantage!

Bisi's "Stitch" redlines at 10.2k on a F22A1.

[highlift]

Bisi's "Stitch" redlines at 10.2k on a F22A1.

But is it a 2.2L?

[deevergote]

I forget the actual displacement of the engine... I can find specs on everything else (at least from recent times, when it was carburetted), but I can't find that!

It started as an F22A1, and I don't see anything about a crank change, so I would assume that it's still 2.2L or larger.

Robert, is it still a 2.2L?