civic vx
- Thread starter 92vx
- Start date
right now you have a gas economy engine, the vx's were known for the great MPG. The good thing is the engine is also a form of vtec engine (d15z1 i think) which means its easy to drop in say a gsr engine cause you dont need to wire for vtec. I wouldnt try to mod the stock engine its not worth it. For a cheaper power upgrade find someone selling the d16z6 out of a 92-95 civic si and drop it right in 
it works great, what kinda engine mods can i do to this? i think i have to put a new intake manifold on for a good intake, right now its just a ractive cone slammed in. anyone know where i can get a cheap skunk 2 ecu for it? i saw them on ebay for a vx
dont bother with the stock motor, its just not worth it. swap either a d16z6/y8 or a b series into it.
u need 2 stick with the d15 i have 1 and ive got 112 mph out of it but i got a k&n filter and a no cat exaust. by the way its a 90 civic WAGON yall!!!!
and arent all 92 models pre wired for vtec regardless if they have a vtec motor
D15z1
I have a 94 VX with 193,000 miles on it and I still smoke other civics... haha, no b16's mind you but mine holds its ground.. on the stock tranny I topped out at 135 but I replaced the gears with and si rebuild so no my governor kicks in at 115 buts its got plent left to go, If I didn't have that in it'd easily go 130. I have greddy (greedy) headers, Intake with larger cone filter, 2 1/4 inch exhaust from the header back with glasspax as my resinator hi flow cat and a Tsudo Muffler. I have an AEM CAM adjustable cam gear, and pulleys. after all this I still get about 35 mpg, not too bad. but if you can afford to do the swap the b16A2 is the best (hydraulic clutch)
I have a 94 VX with 193,000 miles on it and I still smoke other civics... haha, no b16's mind you but mine holds its ground.. on the stock tranny I topped out at 135 but I replaced the gears with and si rebuild so no my governor kicks in at 115 buts its got plent left to go, If I didn't have that in it'd easily go 130. I have greddy (greedy) headers, Intake with larger cone filter, 2 1/4 inch exhaust from the header back with glasspax as my resinator hi flow cat and a Tsudo Muffler. I have an AEM CAM adjustable cam gear, and pulleys. after all this I still get about 35 mpg, not too bad. but if you can afford to do the swap the b16A2 is the best (hydraulic clutch)
tear out the boat anchor from under your hood and swap in a b-series....a B16A would be the perfect solution! i've heard about all 92 hatches being wired up VTEC regardless of trim level,dunno if it's true though
Re: D15z1
why do i highly doubt that concidering an ex with 30 more hp and better aerodynamics tops out in the low 120s. and no the b16a2 isnt the best.
Re: Re: D15z1
Plus when you swap the vx's tall gear ratio over to the si's gear ratio you notice a HUGE differance in torque! and power! so If you don't believe me come race me !
The B16A is a better engine than the others for the fact that optimul r/s (Rod over Stroke) ratio is 1.75. The B16's r/s ratio is 1.74 the next closest is the b18c1,b18c5 then b18b then b20. the bigger the crank the more pressure you put on the side walls. Venom racing has a b16 with over 800hp. My friend had one built by them but had to de-tune it down to 600hp because he wasn't getting anytraction. I don't have anything against the bigger engines but honda knew what they where doing when they made the b16.
After everything I've listed in the earlier post is good for about 30 hp plus the vx is lighter due to the whole "economy" thing.
Plus when you swap the vx's tall gear ratio over to the si's gear ratio you notice a HUGE differance in torque! and power! so If you don't believe me come race me !
The B16A is a better engine than the others for the fact that optimul r/s (Rod over Stroke) ratio is 1.75. The B16's r/s ratio is 1.74 the next closest is the b18c1,b18c5 then b18b then b20. the bigger the crank the more pressure you put on the side walls. Venom racing has a b16 with over 800hp. My friend had one built by them but had to de-tune it down to 600hp because he wasn't getting anytraction. I don't have anything against the bigger engines but honda knew what they where doing when they made the b16.
if you think intake and exhaust adds 30 hp to a vx, i want whatever your smokin. for top speed, weight has little bearing, its all about hp, gearing, and aerodynamics. the vx's lack of top end hp, and gears that are too tall to effectively use a hondas hp. and no im not going to race you moron.
as for teh b16, yes it does have an optimal r/s ratio. but theres more to a motor than its r/s ratio. that simply is a theoretical "perfect" ratio, it means little in the real world. the actual engine design, displacement, head flow, etc all make a difference. if you plan on spinning 12,000 rpm, yes a b16 is best. but the 1.54 r/s gsr/itr work just fine at 9500-10000 when properly built, which is prenty high. look at any pro drag car, some run b16 blocks, some b18, but almost all of them have bored it out to some extent, usually to about 2.0-2.2 liters. the problem with the b16 is it just doesnt have enough displacement. you can make the same power on a 2.0l engine as a b16 with significantly less boost, and you get more torque and a wider powerband.
as for teh b16, yes it does have an optimal r/s ratio. but theres more to a motor than its r/s ratio. that simply is a theoretical "perfect" ratio, it means little in the real world. the actual engine design, displacement, head flow, etc all make a difference. if you plan on spinning 12,000 rpm, yes a b16 is best. but the 1.54 r/s gsr/itr work just fine at 9500-10000 when properly built, which is prenty high. look at any pro drag car, some run b16 blocks, some b18, but almost all of them have bored it out to some extent, usually to about 2.0-2.2 liters. the problem with the b16 is it just doesnt have enough displacement. you can make the same power on a 2.0l engine as a b16 with significantly less boost, and you get more torque and a wider powerband.
the bigest problem with the vx is its designed for economy, when you increase the air volume and fuel, and decrease restriction in the exhaust plus with taking away a lot of drag on the pulleys you increase hp everyone agrees plus switching to si gears removes the vx's poor top end so at high speeds you are at the rpm level where hondas make their power. Thats what I'm sayin so I'd prefer not to be called a moron because I do know what I'm talking about.
I agree that the b18 and others make more torque but they are also more maintainance and when you get to a crvtec you just better have a fat wallet. The bore on b16's 17's and 18's are pretty much the same just differant strokes = differant displacements. Bang for your buck if the person who started this subject wants to get more go out of there vx swap motors... I say b16 because its cheaper than an 18 so you could pop higher compression pistons in even switch cams and the crank and rods for the price you pay for the gsr swap. JUST MY OPINION.
you've been reading manufacturers websites for that stuff huh? well most manufacturers fudge the hp gains, some much more than others. where exactly did you come up with that 30 hp number? pulled out of your ass? added up the claimed hp from the stuff you added? or just what it feels like to you? the vx was designed for economy. you know how a dirty air filter lowers mpg? well a really restrictive intake is the exact same thing. now do you think honda would have spent all that money to make that car get the mpg it does only to ruin it with a too restrictive intake? i dont think so. same goes for the exhaust. restrictive not only ruins hp, it also hurts mileage. ah pulleys.... you do know that they, like i/h/e dont add one single hp. they simply free up lost hp to the friction in the engine accessories. now come one, think about it, do you really believe that your alternator and pumps use 20 hp to run? a 5hp generator can power an entire house mind you. that stuff, maybe, on say a chevy or mustang v8 might get you 30 hp. but on your honda, which has already been made to be as efficient as possible, might in total gain you 4-8 hp, tops. yes the gears do help, but you claimed 135mph before that. and gears dont add hp either, they just give the car more mechanical advantage.