Originally Posted by Bense

NOTE:If you reply to this thread with a question that as already been answered or an issue that has already been addressed, I will delete you post to keep this thread clean. If you want to discuss or ask question, go to the discussion thread. I am keeping this thread clean to help everyone else on here from having to sift through pages and pages of information. Thanks


What is H2B?
H2B, can also be called F2B is mating a F or H engine to a B-series transmission. F and H have the same bolt pattern for the transmission, since you can use a F trans on a H engine, and vice versa, H2B is also F2B. For clarity Instead of calling the setup "H2B/F2B" I will call it H2B from this point foward.

H2B uses b-series axles, b-series linkage, b-series mounts, b-series clutch, b-series pressure plate.

On our civics/integras we have 3 main mounts:
Rear transmission mount
Passenger side transmission mount
Drivers side <FONT COLOR="blue">engine</FONT> mount

As you can see, only one mount actually connects to the engine. Both H2B kits include a custom timing belt mount on the engine that mates to the stock B-series chassis mount This means, you use B-series mounts. Both H2B kits strongly reccomend using aftermarket mounts and at the minimum to use mount inserts.

Advantages of H2B:
The main advantage is displacement. Big Bore = Big Power. With the relatively low cost of the H/F-series longblocks, it gets to a point where H2B/F2B is a lot more cost effective than building a B-series, particulary NA. In my opinion this is a good alternative to the K-series swap.

When comparing it to a K-swap, you don't have to worry about the shifter, you don't have to spend an arm and a leg for the mounts, you don't have to buy that expensive K-pro, no custom axles. There is plenty of aftermarket support and knowledge for the H/F-series engines, as well as plenty of aftermarket support and knowledge for the B-series transmission. The best of both worlds. H2B kits may seem expensive at first, but when you compare all these other factors, it begins to seem like a bargain. Remember, All other non-D swaps require custom axles, mounts, and shifter modification.

What H2B kits are available?
http://evoindusa.uia.net/index...98ba9
http://quartersportsdrag.com/H2B.html


What's the main difference in the kits?
Evolution uses a custom flywheel
QSD uses a flywheel spacer


Alternator brackets?
As far as I know, explicit speed is the only company that offers prefabricated alternator brackets. Correction, Camp1320 now offers them too.
http://www.explicitspeedperfor....html
camp1320.com

Other issues with H2B:
The engine sits in a higher location than normal h22 swaps (non-h2b) so hood clearance is an issue. You can space the hood with longer bolts + washers/spacers. The thread pitch is M6-1.0. The other option would be to maybe fabricate a custom rear t-bracket that drops the engine/trans about 1" or so and put washers between the chassis mounts and the trans. Whichever you prefer.

Header/exhaust manifold issue:
The H/F series tilts towards the firewall like this / (drivers side view) but with H2B the engine is placed in a more vertical position like this | With that said, the stock prelude/accord exhaust manifold will point up towards the firewall. You have two options here, you can heat the stock manifold up and bend it to the desired position. The custom route is also available, camp1320 currently offers an H2B header at a reasonable price, I've also heard of RMF supplying custom H2B headers and I believe (could be wrong) that Bisi is working on one for his evolution kit.

Here's some links to get you started:
camp1320.com
http://bisimoto.com/wst_page6.html
http://www.myspace.com/rmf_headers

Wiring:You will need to use a b-series harness and extend the alternator wires. You may have to do some hybrid wiring with the distributor plug. There is abundant information on this, especially here: https://honda-tech.com/zerothread/650329

Other things worth mentioning:
Some swaps (depending on the kit) may tilt the engines too far foward that henders normal engine oil drain issues. If your setup requires a drain plug relocation, you can weld one of these nuts wherever you prefer.
https://honda-tech.com/zerothread/2008473

I know there's another H2B faq, but it's a traffic jam of information and I'm seeing several H2B faq threads floating around these forums. I am making this to help the other guys that aren't as familiar with H2B aware of this information.


<FONT SIZE="3">Another very important thing</FONT> I am growing tired of seeing this Evo vs QSD, or Bisi vs RMF stuff. I will not tolerate any of this useless bickering. I don't care who said what, don't make posts that encourage this pointless debate. If you don't like a certain kit, speak about it on a mature and technical level. Thanks.

More to update, but this is a rough start

Originally Posted by LucasD24

I am having the same issue as you did... but 5 years later... any help?? lol

F23a1 block
H2B post mount doesn't fit on the f23 block

Right now I am leaning towards just custom-making a post-mount in CAD but want to save my time/money if there is an already made solution out there...

I have looked over tons of forums and google searches and haven't found anything.

Is anybody out there...?