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H23A1 or H22A1 Circle Track Race Car

 
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Old 02-04-2016, 02:52 PM
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H23A1 or H22A1 Circle Track Race Car

I am having a little dilemma... My car currently has a fresh H23A1 in it and i am debating on doing some light engine work to it and see if i can wake it up a little or should i just swap in the H22a1 I have... I am thinking of putting in the TB and injectors off the H22a1 since the TB is 2mm larger and the Injectors are almost 100CFM's bigger... Also i was going to have my stock cams reground. If i do that would i be close to the 200hp the H22a1 puts out or just swap in the H22?


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Old 02-06-2016, 04:17 PM
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Re: H23A1 or H22A1 Circle Track Race Car

not close...
put h22, P&P etc..
what transmission do you have? m2s4?
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Old 02-08-2016, 10:08 PM
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Re: H23A1 or H22A1 Circle Track Race Car

M2F4 which is mated to the H22a1 and i am not sure what is Mated to the H23a1... If my research serves me correct The M2s4... Just went and looked M2S4..
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Old 02-09-2016, 03:15 AM
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Re: H23A1 or H22A1 Circle Track Race Car

Ahh, so u have m2f4.. Ok good, that's better for racing
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Old 02-12-2016, 11:22 AM
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Re: H23A1 or H22A1 Circle Track Race Car

What kind of cars are you going to be running against? Also what size track will you be running on? You don't have to have the highest hp engine to win. As long as you have similar power as your competition, I'd worry more about the handling and getting the car to turn. An extra 20hp won't matter much if you're always pushing up the track in the turns.
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Old 02-21-2016, 09:38 PM
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Re: H23A1 or H22A1 Circle Track Race Car

I will be running against all different kinds... CRX's being the toughest they out handle just about anything. Integra/Civic's some Neon's and Cavaliers. will be running a 3/8 mile track with little to no banking. Weight in the Prelude is one reason for the extra hp need..
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Old 02-21-2016, 09:42 PM
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Re: H23A1 or H22A1 Circle Track Race Car

Right now I am struggling with cooling and vacuum system. I want to delete all i do not absolutely need to make the car run and go. Like the bypass control diaphragm can i get rid of it? Can i delete the EGR? etc...
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Old 02-22-2016, 09:45 AM
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Re: H23A1 or H22A1 Circle Track Race Car

I've still got the FITV and IACV on my H22, i didn't bother removing them. You can delete the EGR valve. Here is the part # for the factory EGR block off plate, 18711-pm1-j00.

I guess depending on what rules they have, but if they make the cars keep the factory engines that came in them (no H22 in a civic/crx, etc) then you'll have more HP than them but you're giving up weight. You should be able to get your 4th gen down to the 2150lb range with a 6 point cage. Focus on getting rid of EVERYTHING. My 5th gen weighs between 2250-2300 without me so you should be able to get down below that.

Get the car built and out on the track to see what you really have first. Since your track is flat you'll need to worry more about getting through the turns more than HP for the straight away.
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Old 02-22-2016, 11:05 PM
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Re: H23A1 or H22A1 Circle Track Race Car

If you are happy to have the check engine light on all the time then you can delete the EGR, FITV, EVAP and IACV without going into limp mode I believe, these are just emissions things. If in doubt just unplug the sensors and go for a drive, if it works then delete away. You could then just pull the bulb from the dash then but you'll obviously lose the ability to see if the ECU is trying to tell you something else (knock, miss etc.) You can also delete the IAB's (bypass control diaphragm as you call it) and either buy a spacer to delete the whole assembly, delete the butterfly's and plug the hole (a little dodgy) or just mount the upper plenum straight to the lower but this way you'll sacrifice plenum volume which is bad.

You'll need to check the regulations to see what extent of modifications you can do to these things though.

Also Spray just out of curiosity, how did you get a 5th gen down below 2300lb?? My 4th is somewhat stripped and I'm guessing i'm in the region of around 2500lb. I haven't weighed it yet but just doing the math they are over 2900lb stock (full fluids, no passengers or cargo) and I've only tallied about 400-450lb from what I have removed. I'm struggling to find big ticket items to save more but the next few lb are going to cost many $$. 2150lb is seriously light WITH a 6-point cage, these things aren't civics. These bitches got some junk in their trunk.
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Old 02-23-2016, 08:52 AM
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Re: H23A1 or H22A1 Circle Track Race Car

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Originally Posted by tassievteclude View Post

Also Spray just out of curiosity, how did you get a 5th gen down below 2300lb?? My 4th is somewhat stripped and I'm guessing i'm in the region of around 2500lb. I haven't weighed it yet but just doing the math they are over 2900lb stock (full fluids, no passengers or cargo) and I've only tallied about 400-450lb from what I have removed. I'm struggling to find big ticket items to save more but the next few lb are going to cost many $$. 2150lb is seriously light WITH a 6-point cage, these things aren't civics. These bitches got some junk in their trunk.
I gutted everything and I mean everything. I started off at 3029 initially. Swapped over to an automatic, but beyond that I just gutted anything I didn't need to make the car run. The only few items I have left are to replace the factory exhaust with a straight pipe, get a lighter battery and probably lighten the hood up some. I'll probably replace the factory bumpers with some tube steel ones but I'm not to that point yet. Here are a few pictures



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Old 02-26-2016, 12:30 AM
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Re: H23A1 or H22A1 Circle Track Race Car

Very Nice... Right now i am deleting ABS and Powersteering. ABS was pretty simple... Power steering i am stuck, What are the 2 lines that go into the trani form the power steering system? Do i just loop them or what?
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Old 02-26-2016, 01:13 AM
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Re: H23A1 or H22A1 Circle Track Race Car

^^ Loop them too. The power steering just uses the VSS (on the gearbox) as a reference to reduce assistance at higher speed. The VSS will still work if it is looped.

Very nice BTW Spray, unfortunately I am required to run glass... and a roof. I didn't think it were possible to get these things so light, I might have to get busy with a grinder this weekend.
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Old 02-26-2016, 03:39 AM
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Re: H23A1 or H22A1 Circle Track Race Car

Damn that looks pretty serious, and rims are nice
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Old 02-29-2016, 12:04 PM
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Re: H23A1 or H22A1 Circle Track Race Car

I put the factory roof back on it. I just drilled out the spot welds.If you do pull the roof, you'll have to brace the pillars with some tube steel, otherwise they'll want to fold in some. You must be running asphalt if you have to keep the front windshield. You could pull the glass and use lexan. The windshield is pretty heavy so you'll save a good bit of weight. I still have my ABS at the moment. The 5th gen ABS isn't that heavy so I didn't bother doing the work for now. To get light you have to get rid of everything that isn't required to make the car run. I didn't cut that much metal off the car. I gutted the doors, removed all the bracing from the trunk and roof and maybe a few small piece of metal between the trunk and rear seat.
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Old 03-03-2016, 11:34 AM
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Re: H23A1 or H22A1 Circle Track Race Car

Okay... Got the ABS delete completed and new lines run. People say you need to pull the engine to do it but if you just remove the Intake manifold you are good... Powersteering is all looped and out. All together it lost about 60 lbs. Now i am removing and looping coolant lines. Doing a EGR, Air boost valve, and IACV Delete to simplify things under the hood.
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