Ultimate NA build: From Honda-tech

[TheSnigg]

This may have been posted already since it has been floating around for a while. But I was speaking with another member and remembered I came accross this. I figured I would post this as inspiration/information for those wanting to go NA. It gives a prettygood breakdown of what is needed to get as close to 300hp as possible!!!!

Honda-tech:
KingMotorsports H23 Vtec ALL motor 282 WHP 196 WTQ!!!!!!

Kingmotorsports blueprinted and balanced bottom end.
12.8:1 compression race gas for a race car
Wiseco pistons
Crower rods
Kingmotorsports ported head and competition valve job
Skunk 2 Pro 3's
Skunk 2 Pro series Intake manifold
Skunk 2 Pro series 68mm Throttle body
AEM cam gears
Custom header
Crower Cro-moly retainers
Supertech valve springs
Hondata intake gasket
Hondata S300

Full thread:
https://honda-tech.com/forums/all-mo...6-wtq-2208596/

[Jarrett]

Nearly all of that is in the cams and header. Those cams are not what I would want to drive around town with, by any means.

[deevergote]

Indeed. From what I've heard, talking to a few people that have done it, about 250whp is about as much as you'd want from an H22A intended for the street. An H23A might be able to do a little more, perhaps.
That build with lower compression and a milder set of cams would probably give right around 250whp. That would be fun in a CB7.

[TheSnigg]

No doubt. Whoever this was went all out. They specified in the thread that it is not a street car. Purely race,and a race fuel tune, I just figured I would post that to show what the max for an NA could be.

[Domesticated]

Well it's not going all out. The only thing custom in this build is the head, which could be their typical head work and not specific to these parts, and the exhaust. There are a lot more gains to be made with a custom intake and cams. But if you have a wallet and want power this is the easiest path.

[deevergote]

I believe Bisimoto's race "f22a" (loosely) was making well over 400hp last I saw.

[Joey GT-R]

I'm very much disappointed to see an H23A make so little in torque, but I place that error on the tuner, probably shooting for 300whp for "wow factor" and not so much what may actually win on the strip.

Forgive me for being ignorant, but why not at least a 70mm throttle body for that build since it's almost exclusively top end, and for that matter why not ITBs, oversized valves anyone?


I would have also like to have seen the bore go to about 88-89mm. If it truly is a "race build" why stop at 12.8? I believe Wiseco is making slugs that push 14.0 if not more.

[sonikaccord]

I'm very much disappointed to see an H23A make so little in torque, but I place that error on the tuner, probably shooting for 300whp for "wow factor" and not so much what may actually win on the strip.

Forgive me for being ignorant, but why not at least a 70mm throttle body for that build since it's almost exclusively top end, and for that matter why not ITBs, oversized valves anyone?


I would have also like to have seen the bore go to about 88-89mm. If it truly is a "race build" why stop at 12.8? I believe Wiseco is making slugs that push 14.0 if not more.

I understand your disappointment. Here is an H23VTEC making 266 whp 192 wtq.

Mods:
Stock Bottom End H23V
Lightly Done RLZ head
ASP Header
Rosko Upper
E85

[SOHC-FTW]

It's hard to beat Howard at rlz if you can get an appointment.

[Raf99]

The 68mm TB caught my eye too, but then I remembered that the Skunk2 intake manifold is 66mm-ish. So they would have to bore out the intake manifold to take a 70mm TB. And I'm assuming after that there would be another bottleneck (valves, etc.). Not sure what's up with the low torque numbers......