LX to VTEC
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o and by the way, why spend more money on gettin a K20? i mean seriously you gonna spend how much for minimal hp? do the research, Sport Compact Car did a crap load of tests with different aftermarket parts on a k20, the hp at the wheels was under 172 on all tests...if you want a project beef up the 2k1/2/3 wit the original engine...plus your gonna prolly save more...and its not like puttin an H22A (prelude) into a CRX, which would make sense due to the power of the H22 and the low weight of the crx....that way less money spent, less power needed but more go...you put a non-turbo H22 in a crx with minor work to keep the car from fallin apart from the power, and that 200hp(193@the wheels) will have u running 12's....respectable time for a non-turbo/nirtous/supercharger...you know...peace...southpaw
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From: Secane, PA (3 miles outside Philly)
Rep Power: 0 Are you kidding me. Go tell the several people that have done swaps on this site that they waisted their time and money and they'll tell you to take a flying leap. And there is no point talking about an H22 swap into our cars because nobody makes the mounts and it won't fit anyway.
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Rep Power: 0 yo casa, talkin bout how everyones writin bout this 13hp difference, do the math ex = 127 lx=115 hx=115 dx=115...im pretty sure thats not 13...n ur rite bout the other thing (lx non vtec) on the ex's have VTEC and so everyone knows, the Si doesnt have VTEC, it has i-VTEC, yes they are different....dx,lx,n hx are not VTEC's, go to HONDA.com everybody its true...gotta jet...peace....southpaw
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From: Secane, PA (3 miles outside Philly)
Rep Power: 0 First of all the HX is 117. Second I'm not the one who posted about 13 hp difference so don't talk to me about math. Third, I never said the Si was VTEC, I was only talking about the Regular 7th gen vic's. Fourth the HX's are VTEC: You need to take a trip to the Honda website my friend. Fifth, you might want to build up your post and point numbers, and establish yourself, before you start trying to call people out and talking out of your a**. Didn't want to have to pull this one out but you're being pretty daring for a noob, who has done nothing but provide misinformation when trying to tell people their wrong.
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From: Secane, PA (3 miles outside Philly)
Rep Power: 0 Originally posted by Southpaw7883
wasnt talkin bout a h22 swap into our cars, sayin a crx dumbass! peace...southpaw
wasnt talkin bout a h22 swap into our cars, sayin a crx dumbass! peace...southpaw
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From: San Antonio, Texas, US
Rep Power: 0 Originally posted by sadboy916
WHO CARES VTEC SUCKS
i still dont know why people make a big deal about it like its a turbo or supercharger. if you want a fast car why buy a honda. LS1 ownes i cant wait to get my hands on a firebird formula
WHO CARES VTEC SUCKS
i still dont know why people make a big deal about it like its a turbo or supercharger. if you want a fast car why buy a honda. LS1 ownes i cant wait to get my hands on a firebird formula
aww ya WRX. 
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From: Pittsburgh, Pennsylvania, US
Rep Power: 0 this entire thread is so stupid. people arguing about vtec, then we got 2 dudes arguing about crxs??? wtf? and they post and post and post right after they just posted instead of EDITING thier ****ing posts and adding the **** they want to say. who cares. vtec isnt worth it. and i even have an ex. sure it is nice to say my car has vtec, but it doesnt even do anything. it adds 12 hp. woopie. it is still a civic. and for the dude that mentioned about the 12 hp making a difference when racing, unless you are racing a little neon or something anything is gunna smoke you, so why even bother. build up your car and take it to the track, keep it off the streets.
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From: Livingston, Tennessee, US
Rep Power: 0 Originally posted by 4bangin
this entire thread is so stupid. people arguing about vtec, then we got 2 dudes arguing about crxs??? wtf? and they post and post and post right after they just posted instead of EDITING thier ****ing posts and adding the **** they want to say. who cares. vtec isnt worth it. and i even have an ex. sure it is nice to say my car has vtec, but it doesnt even do anything. it adds 12 hp. woopie. it is still a civic. and for the dude that mentioned about the 12 hp making a difference when racing, unless you are racing a little neon or something anything is gunna smoke you, so why even bother. build up your car and take it to the track, keep it off the streets.
this entire thread is so stupid. people arguing about vtec, then we got 2 dudes arguing about crxs??? wtf? and they post and post and post right after they just posted instead of EDITING thier ****ing posts and adding the **** they want to say. who cares. vtec isnt worth it. and i even have an ex. sure it is nice to say my car has vtec, but it doesnt even do anything. it adds 12 hp. woopie. it is still a civic. and for the dude that mentioned about the 12 hp making a difference when racing, unless you are racing a little neon or something anything is gunna smoke you, so why even bother. build up your car and take it to the track, keep it off the streets.
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From: toronto, Ontario, Canada
Rep Power: 0 no.. not worth changing to vtec... heck, ex are not significantly faster than lx... heck, my cheap lx can outrun my friend's 1.7 (auto) on a good day (prolly cause his car's heavy)... DONE
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From: sacramento, California, US
Rep Power: 0 Originally posted by Diemos
I hate LS1s they are chick cars. And not only that you see them all over the frikin place, they are almost as common as Civics. And they share the same body style as the V6 trim. Not to mention they dont even make them anymore. And for the price of an LS1 you could get a WRX and make that baby nice aww ya WRX.
I hate LS1s they are chick cars. And not only that you see them all over the frikin place, they are almost as common as Civics. And they share the same body style as the V6 trim. Not to mention they dont even make them anymore. And for the price of an LS1 you could get a WRX and make that baby nice
aww ya WRX. 
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From: Mt. Prospect, IL
Rep Power: 0 wow, if you guys spent just half the time you spend trash talking each other on actually answering the poor guy's question, more people might actually read these forums and learn something!
It's a damn shame...
It's a damn shame...
DIY King
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From: Shrewsbury, Massachusetts, US
Rep Power: 418 Damn, nobody is answering the original question...
First of all, VTEC on the 7th gen isn't worth didly squat. EX has VTEC and a header and a cat placed farther down. HX has VTEC and a header/cat combo. LX/DX doesn't have VTEC, but also has a header/cat combo. HX has 117hp, LX/DX has 115hp, and EX has 127hp. Duduction gives you... VTEC only produced an extra 2hp. Why? hp(EX) - hp(HX) = hp(header and a cat placed farther down) hp(HX) - hp(LX/DX) = hp(VTEC). This is why an exhaust conversion on the LX/DX is the best way to produce power. Gross simplification of the explanation, but it works.
Anyway, to make an LX or DX have VTEC you need... The EX's head. The EX's VTEC solenoid. The EX's ECU (for the engine). And the EX's ECU harness (for the engine). That's about it. The easiest way (and probably the cheapest) is to just get an EX engine and swap it in along with the ECU and wire harness. I've seen them go for as low as $350. Bleh.
First of all, VTEC on the 7th gen isn't worth didly squat. EX has VTEC and a header and a cat placed farther down. HX has VTEC and a header/cat combo. LX/DX doesn't have VTEC, but also has a header/cat combo. HX has 117hp, LX/DX has 115hp, and EX has 127hp. Duduction gives you... VTEC only produced an extra 2hp. Why? hp(EX) - hp(HX) = hp(header and a cat placed farther down) hp(HX) - hp(LX/DX) = hp(VTEC). This is why an exhaust conversion on the LX/DX is the best way to produce power. Gross simplification of the explanation, but it works.
Anyway, to make an LX or DX have VTEC you need... The EX's head. The EX's VTEC solenoid. The EX's ECU (for the engine). And the EX's ECU harness (for the engine). That's about it. The easiest way (and probably the cheapest) is to just get an EX engine and swap it in along with the ECU and wire harness. I've seen them go for as low as $350. Bleh.
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From: sacramento, California, US
Rep Power: 0 Originally posted by chriscivic
I have an 02 trans am Ws6 and wh a v8 5.7 liter engine and it would leave a wrx in the dust.
I have an 02 trans am Ws6 and wh a v8 5.7 liter engine and it would leave a wrx in the dust.
im a few months far from getting a 99 firebird formula:devil:
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From: Washington DC
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Originally posted by Grey
Damn, nobody is answering the original question...
First of all, VTEC on the 7th gen isn't worth didly squat. EX has VTEC and a header and a cat placed farther down. HX has VTEC and a header/cat combo. LX/DX doesn't have VTEC, but also has a header/cat combo. HX has 117hp, LX/DX has 115hp, and EX has 127hp. Duduction gives you... VTEC only produced an extra 2hp. Why? hp(EX) - hp(HX) = hp(header and a cat placed farther down) hp(HX) - hp(LX/DX) = hp(VTEC). This is why an exhaust conversion on the LX/DX is the best way to produce power. Gross simplification of the explanation, but it works.
Anyway, to make an LX or DX have VTEC you need... The EX's head. The EX's VTEC solenoid. The EX's ECU (for the engine). And the EX's ECU harness (for the engine). That's about it. The easiest way (and probably the cheapest) is to just get an EX engine and swap it in along with the ECU and wire harness. I've seen them go for as low as $350. Bleh.
Damn, nobody is answering the original question...
First of all, VTEC on the 7th gen isn't worth didly squat. EX has VTEC and a header and a cat placed farther down. HX has VTEC and a header/cat combo. LX/DX doesn't have VTEC, but also has a header/cat combo. HX has 117hp, LX/DX has 115hp, and EX has 127hp. Duduction gives you... VTEC only produced an extra 2hp. Why? hp(EX) - hp(HX) = hp(header and a cat placed farther down) hp(HX) - hp(LX/DX) = hp(VTEC). This is why an exhaust conversion on the LX/DX is the best way to produce power. Gross simplification of the explanation, but it works.
Anyway, to make an LX or DX have VTEC you need... The EX's head. The EX's VTEC solenoid. The EX's ECU (for the engine). And the EX's ECU harness (for the engine). That's about it. The easiest way (and probably the cheapest) is to just get an EX engine and swap it in along with the ECU and wire harness. I've seen them go for as low as $350. Bleh.
The EX has all 16 Valves opening all the time, with just the shift in the cam profile at 4500 or whatever it is.
Either way... it doesn't do much of anything.
DIY King
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From: Shrewsbury, Massachusetts, US
Rep Power: 418 Yeah, it is different at lower rpm's. Definately. Not all too different at higher rpm's though. That's where hp is measured, so... That's why I also said a gross oversimplification. It probably still works out to VTEC having less of an impact in our cars than the header and cat that's further away. At least that's what I think. 
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From: Washington DC
Rep Power: 423 Originally posted by scarpones
vtec only makes a worthwhile difference in a b18, h22 and my baby the s2grand
vtec only makes a worthwhile difference in a b18, h22 and my baby the s2grand
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From: South Jersey
Rep Power: 0 Boilermaker has it right.... whereas the horsepower on the EX is measured where the cams on on their "vtec" lobes, the hx doesn't not have high rpm vtec.... the HX's vtec is designed only at low rpms to control (effectively close) a set of valves.... don't quote me on this....
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From: California, US
Rep Power: 351 Originally posted by Grey
Why? hp(EX) - hp(HX) = hp(header and a cat placed farther down) hp(HX) - hp(LX/DX) = hp(VTEC). This is why an exhaust conversion on the LX/DX is the best way to produce power. Gross simplification of the explanation, but it works.
Why? hp(EX) - hp(HX) = hp(header and a cat placed farther down) hp(HX) - hp(LX/DX) = hp(VTEC). This is why an exhaust conversion on the LX/DX is the best way to produce power. Gross simplification of the explanation, but it works.
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