jdm engines.

[MyDianaZ06]

Does an H23a have high compression?

[Cmqqn85]

[edit] H23A1
The H23A1 was an increased-stroke, non-VTEC version of the H22a, designed for the North American and UK market 1992–1996 Honda Prelude Si. It shared the same Fiber Reinforced Metal (FRM) cylinder wall liners with the H22a.

Specifications

Bore × Stroke: 87.0 mm × 95.0 mm (3.43 in × 3.74 in)
Displacement: 2,258 cc (137.8 cu in)
Valve Configuration: DOHC, 16 valves
Type: In-line 4 cylinder, aluminum block and head
Compression ratio: 9.8:1
Max power: 160 hp (119 kW)
Max torque: 163ft·lbf (207 Nm)
Redline: 6500 rpm
Engine Control System: Honda Systems PGM-FI with port fuel injection
Valve Gear: belt-driven dual overhead cams, 4 valves per cylinder

[cb95spd]

some good info in this thread
props to the members who contributed

[Cmqqn85]

google is an amazing feature to the internet!

[MyDianaZ06]

[edit] H23A1
The H23A1 was an increased-stroke, non-VTEC version of the H22a, designed for the North American and UK market 1992–1996 Honda Prelude Si. It shared the same Fiber Reinforced Metal (FRM) cylinder wall liners with the H22a.

Specifications

Bore × Stroke: 87.0 mm × 95.0 mm (3.43 in × 3.74 in)
Displacement: 2,258 cc (137.8 cu in)
Valve Configuration: DOHC, 16 valves
Type: In-line 4 cylinder, aluminum block and head
Compression ratio: 9.8:1
Max power: 160 hp (119 kW)
Max torque: 163ft·lbf (207 Nm)
Redline: 6500 rpm
Engine Control System: Honda Systems PGM-FI with port fuel injection
Valve Gear: belt-driven dual overhead cams, 4 valves per cylinder

NO I was asking about the H23A JDM vtec. I think it comes out of a CH9/CL2 Accord Wagon. But I didnt know they had'em for North American and UK market. would you happend to know specs on that motor?

[Cmqqn85]

I found this...

ENGINE
Displacement, cc: 2258
Engine model: H23A
Max.power (Net), kw(PS)/rpm: 200 ps (147.10 kw) / 6800 rpm
Max.torque(Net), N*m(kg*m)/rpm: 22.5 kg*m (220.65 N*m) / 5300 rpm
Power density: 7.15
Engine type: Water cooling serial 4 cylinder DOHC16 valve
Engine information: VTEC horizontal ranging belt driving
Fuel system: Electrically controlled gasoline injection system (HONDA PGM-FI)
Turbocharger: No
Fuel type: Unleaded premium gasoline
LEV system (Low emission vehicle): No
Compression ratio: 10.6
Bore, mm: 87
Stroke, mm: 95
Final gear ratio :
Fuel consumption at 10-15 modes, l/100km: 8.7
Fuel consumption at 60 km/h, l/100km

But on another web site, an actual distributor est the HP to be around 230. IDK if thast true or not...

[bagoon316]

thats the JDM H23A VTEC. its a blue top engine. that does need premie.

i dont think its a matter of CR, but to find out if your pistons are dish, flat, or dome. my f20a dohc jdm, is -4cc roughly, to me this is close enough to flat and i run 93 octane in it. anything flat or dome needs premium gasoline. anything dish can run 87. if you figure out your piston cc, you can make a determination for yourself what octane level you want to run.

[bagoon316]

just to add for piston volume and such...here is Cisco's engine calculator which i use heavily...

http://www.cb7tuner.com/vbb/showthre...ine+calculator

you type in all your specs such as bore, stroke, head volume, hg thickness, and whatever the stock CR is of the engine...at the bottom it will spit out piston cc's. if its neg which a stock f22 should be -15 or close to it, then you can run 87 gas. anything close to zero or positive, i would run 93. just my opinion, its all up to you.

[Cmqqn85]

Nice addition ^^ with the link

[MyDianaZ06]

I thought you had to run the H23A with premium because of the high compression.

!thanks Cmqqn85 with the specs!

BTW, bagoon316, yeah F'ing great tool with the Cisco Calc!!!!!

[m0bman]

i woudl put a h22a motor onmy future CB7

[marcusv8thunder]

in my area they have 100 octane at this gas station down the street pretty illegal but they keep it low cause u have to say a code to get that gas. cost like 8 dollars a gallon.... runs like your in heaven ...forealz

Here in the UK we can get 99 octane from Tescos which is a supermarket food store, and 97 in mosts pumps, 95 is the normal stuff. The 99 is only a few pence more than the 97 if not the same in some places.

Makes a difference for me anyway when i put it in.

[cerealkiller93]

Why are you guys running such high octane? Unless you got some crazy NA build,running nitrious or boosted,anything over 91 is pointless.

Just my .02 cents

because around here they offer 87,89, and 93. 91 is unheard of around here. you guys outwest get screwed with that one for some reason. I dont know about up north, but i know every gas station here has those choices, couple of gas stations offer 100 octane but they only let you put it in a container, not your vehicle.

I run 91 octane and it runs fine. I should honestly run a higher octane but California only offers 91 in common gas stations. Octane booster might help, but I'm a little skeptical about those types of products. I wonder if they actually work or have an effect.

Anyway, 87 would be too low. Your car wouldn't run as efficient as it should.
Stick with 91 and above.

i've done a little research on octane boosters, and from what i've seen they if you buy the best one you can find, it boosts octane by about 1 point. But in a literal since, yes they work.

[cb7_sedan]

personally i wouldnt throw cheap gas in even if the car was bone stock i feel like i push my car 2 much and usaully it doesnt ever give me problem so when it asks me for gas i gotta give bak 2 her and give he the best not 2 mention its only 3 cent difference might as well