Chris Hillman

I race my car(93 prelude) on a dirt track. It has the h23a1 in it, non vtec head. Our rules state that we cannot have v-tec, or any variable valve timing. So, I was wondering if I would make more power with an h-22 v-tec head on my motor with the vtec locked in and the v-tec solenoid removed? Any down sides? Bottom end is stock, balanced, new bearings. Any help on this would be much appreciated. Thanks in advance to anyone who takes the time to help/respond.

IAluder95

iTrader: (1)

The whole point to h23vtec is for the timing.

For what you are doing. I would stay h23a head and build it. Its safer and it matches the motor without doing a bunch of unnecessary work. Save that money and put into other parts

TimiK

Vtec killer cams :D

Chris Hillman

Is the h23a head the best option to make power without vtec? Is there a better head option without vtec for the h23? I've never owned a honda until about a month ago, I have been reading my butt off in these forums, and will do some reading on the killer cams. I just want to make as much power as possible and be "legal". I also have the option of putting in a set of type s pistons, as my "b" cylinders are in excellent condition. Would those be worth the effort/money without a vtec head? We can run 110 octane, so detonation won't be a problem.

IAluder95

iTrader: (1)

Build the h23. No other head is worth it. There are plenty of cam options for the h23 as well. The h22bhas more options for parts yes but that is because it uses vtec. If you can not utilize vtec your wasting time and money.

Type s piston? Id would buy a nice set of wiesco personally and hone the block to 2.4l. But thats me.

TimiK

If you sleeve your block you can put even better pistons there. There is aftermarket cams for h23 as well (crower if I remember right).. Then just port & polish head + intake manifold (blacktrax have also adapter plates for them) + custom full exhaust

snobordboy

Personally, I would be getting in touch with reputable head builders, and see if they have flowbench numbers for both heads, that will tell you a lot about what your limit will be. Cams are going to be a variable that is easier to deal with, although I would venture to say that the H22 has more cam options out there, although I am not sure how much profiles will be changing if you are locking the rockers to delete the variable aspect and the low lobes. Just in my mind, there is probably a reason why all the big power H builds are using an H22 head, even if they are deleting VTEC to use roller cams or VTEC Killers.

With the fuel choice, you do have some room to go higher with compression and there for go more aggressive on the cams as well. In that case, I would be looking at what you can do in your rules to get the displacement and compression to your highest benefit, and also to maximize the rpm range you run the car i.e. if you would be better off using a shorter stroke and more bore for a higher rpm range compared to a big stroke engine with the H23 or even a 97 mm stroke crank.

Chris Hillman

First, thx for the responses guys. I'm sure you've heard this before, but I'm trying to do this as cheaply as possible. I have two h-22 heads, and of course my original h23 head. I don't want to sleeve the block because the machine shop said the bores are in excellent condition. I have access to the type s pistons that fir my bore size. I have researched on here and found that is a great way to build compression on an h23 motor. I was just wondering if adding the compression will help much while running a stock h23 head. It only pays 125$ to win the features, so I don't want to drop a bunch of money on a roller valve train, killer cams, etc. That's why I was curious about trying to take advantage of the big lobes on the h22 head, with the vtec locked in. I was just wondering about the reliability aspect of locking in the vtec, and whether you all thought it would make more power. I don't want to work on this thing every night, or pull motors all season long, as I have three other rwd v-8 cars I take care of also. Here's a few pics of my project.

TimiK

IMO if youll get your h23 head port and polished, increase the compression and get better h23 cams there it wouldnt differ that much from h22 head without vtec - just let some head builder do their magic for you h23 head - the easiest and the cheapest solution?

check this
http://www.blacktrax.net/products/In..._Manifold.html

1992BB2

I'm curious, why would they care whether you had VTEC or not?

Chris Hillman

I can't answer that one lol. I didn't make the rules, I just want to bend them.

TimiK

then just show some angle grinder to "vtec" text on valve cover and use vtec engine

Chris Hillman

I thought about having that milled off, but they look for the solenoid for the VTEC that's why I was wondering if I could lock the VTEC in and remove the solenoid.

Tight-R

https://honda-tech.com/forums/drag-r.../#post47559904

Took like 3min using google search.

Chris Hillman

I have already read that article multiple times. Why must there always be a smart a** person in these posts? If you would of took 3 minutes and paid attention to my op then maybe you could of actually helped. I asked if it would benefit me to do this, and whether someone with more experience with these little hondas could give me any solid info.