I have been thinking of putting the Apexi AFC/Neo on my 2001 prelude. I was told it would give me 15-30 more hp and it has a vtec controler that I can set when it kicks in. I was wondering if anyone has heard anything about it. I have a CAI and exhaust. I am planning on going turbo when I have more money. neo a good idea? any better ideas? the Apexi neo will cost me 390 for the part and 160 for install.

 

not worth it at all with only intake and exhaust. moving the vtec x-over around without internal work done will more than likely lose you power. if and when you do go turbo, there are better options available. fully programmable engine management systems like hondata and crome allow you full control of the fuel and ignition maps as well as vtec and other functions. that afc/neo only allows you to mess around with the fuel maps a little and vtec.

 

well I was talking to my friend today, we were talking about turbos, basicly just our hondas. I was telling him I wanted to get 300 hp, or 275, somewhere around there. He said I would not need a turbo to get that, but he didnt say what I could do in order to get that. He just told me he had a guy I needed to take it too. I am a little skeptical of just taking it to some dude to blow up. Is it true that I can get up to 275-300 hp without a turbo? If so, how...?

 

275-300whp on an all motor setup is quite possible with an h22, but it will be very very expensive and not practical to drive on the street. besides, you can hit those power numbers with a turbo for much less.

 

Honda H22 H22a 2.5L 335+HP stroker naturally aspirated engine 93 octane pump gas
300+ Naturally Aspirated HP. Only $12,000. IMO probably worth every penny.

 

Oh my you have MUCH to learn, my friend...

1. Not worth it, period. Even with many other upgrades (not talking about an intake and muffler but major engine work) it isn't worth it.

2. Moving VTEC x-over will hurt power (if the engineers could make more power by moving the X-over lower, they would, DUH) Basically, if you think moving the X-over will help, you have no clue as to what VTEC is or how it works...

Please go and read about the operation of VTEC, you will quickly learn that moving the X-over is useless...
As was said above, just get an engine management system, like cROMe, Uberdata or even Hondata. Much much better... A must for turbo...

 

Yes, and thats why I'm here asking questions...

I have done reading on how the vtec works already, and guess what, I kinda know how it works. There must be a detail, oil pressure maybe, that allows it to only work at high rpm. All you had to say is no, Apexi didnt create some magical chip that makes the vtec kick in lower, its impossible. Have some respect. Being Mr. Know-it-all only helps your ego.

 

I'm sorry I didn't mean to be a dick. Bad day at work LOL. But knowledge only comes from reading, some of which you have done, but there is still much to learn... Me too, I'm no exception...

You were right originally, Apexi did make an AFC that can activate VTEC (just takes 5 Volts)

I'll help...
The VTEC is nothing more than the ability to use 2 different cams, that's it period. The 2 cams are combined into one camshaft, with a mid-lobe, for higher lift and longer duration.
The ECU is programmed to "turn on" VTEC at a certain RPM, once the other parameters (Oil pressure, Coolant temp, RPM, Engine load (MAP sensor), throttle position, etc.) are met. When it does, it uses a valve that is ECU controlled to allow oil pressure to force the valves (Both I and E on DOHC and only I on SOHC) to follow the profile of the mid lobe on the cams. The mid lobe not only has higher lift (meaning the valve opens further) but longer duration (keeps the valve open longer, even to the point of where the intake and exhaust valves overlap on DOHC VTEC) this gives the characteristically VTEC sound, the Ripping noise once the VTEC is activated.

If you were to look at the performance of the 2 cams on a graph, without the VTEC system, meaning using the primary and secondary cam lobes on one run, and the mid lobes only on the second run, with the Horsepower of the motor on the Y-axis (vertical) and the RPM on the X-axis, you would be able to see the point at which the two lines cross each other, this is ideally where you would want to have your VTEC crossover, if you were to activate the VTEC any earlier, you would see that you would be losing power. Same thing if you were to extend the VTEC X-over to 6k, you would simply "ride" the primary and secondary cam lobes out to where they are inefficient. Some chips use this to make it feel like a harder VTEC engagement.

Again, didn't mean to be cocky... But I think you will see that it is not really worth it...

 

Alright! Now that helped me a lot. Thank you!

 

Cool, glad I could help...