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Last weekend i installed a short ram AEM V2 intake, NGK iridium spark plugs, and a straight pipe exhaust and i was just wondering how much more HP i would gain from those. my car is an EX so its 127 stock hp. oh and i dont know if it would make a difference or not if i use 91 octane...

 
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not much. less than 5hp..sry mods dont work for these cars..stick to the "look".

 
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If you put the AEM sticker on your car I'm thinking about 9 crank horse (since you're quoting crank horse in your post)

 
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higher octane gas is just cleaner so dont waste yur money buying that gas for our cars. yeah at best 5 horsepower....MAYBE to the crank. remember that 127 is at the crankshaft. when it gets to the wheels we only have about 100 horsepower to the front wheels. so if u end up getting I/H/E you MIGHT end up with 115-120 at best, and thats including a flywheel and a few other bells and whistles. i made the mistake of thinking i could make my car fast when i got it, but ive learned that its better to go for th elook, but i'm stubborn and gonna boost it when i got $$$$.

 
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exactly what im doing...im getting a loan from the bank this friday (if i get accepted of course) and yes i put the AEM sticker on my car i heard it adds like 40 hp lol...i could car less about looks personally...i have a body kit and ridin on my 'Si's' and im happy with that....

 
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the only true way to know is to dyno.... but as long as youre happy

 
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having higher octacn wont boost hp...
ur exhaust is only going to make u lose hp and gain tq
and plugs wont do a daym thing

 
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higher octane wont boost hp

higher octane = harder to burn=longer burn time/= 5 hp


ITS PROVEN ON THE DYNO...HIGHER OCTANE WONT BOOST HP

 
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wouldn't that be the other way around....if you remove to much back pressure you'll lose torque but gain horsepower as less energy is used to expel gases.

 
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read some of the gas threads, higher octane isnt good for an NA civic..

 
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SO, if I got AEM c/a/i and HP header and cat-back I shouldn't be able to take a 03 civic EX stock????? I got an LX !!!!!

 
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Engine modifications for these Civic's actually lower the horsepower.

 
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the lx and ex are pretty even on the 1/4, so yeah if you can drive you can beat one. with those mods maybe by like an extra 1/2 car or so.

 
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SO thats a "NO"? right?....cuz I haven't tried without nitrous but since I put the header and the cat-back I feel the diference when spraying....flows better! I wanted to know without it....

 
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Thanks man......

 
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the octane question was just asked a while ago. the guy is getting pinging noises from the engine (more than likely from the 91) so don't put that in your car.
as for horsepower + or - 2hp

 
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if u run no2 make sure u go 2 steps lower on the heat range of the plug...not to mention bigger injectors...or a way to put more fuel into the system

 
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ur an idiot for thinkin more octane gives u more hp

the answer about his pingin noise comming from his engine is because the controled burn in the cylinder has reached max pressure btdc thus creating detonation...not to mention destorying the piston

 
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who said i was talking about the octane hp? didn't he also ask about the other **** added? thats what i was talking about.
search before you open up your damn mouth again n00b. we already said the octane wasn't good for our cars. SEARCH, thats why i said it's already been discussed.

 
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i just realized he got banned

 
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Lol there's a reason for that

 
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what? tell me tell me! lol

 
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If anyone wants to know the real purpose of octain ratings here it is: The higher the octain the slower it burns. High compression engines like sports cars require high octain fuel to prevent spark knock (pinging or pre-ignition) octain Economy cars are for economy and that means cheap gas lilke 87 octain. And 87 actually has less additives than 89 or 93. This is why Outboard motor companies (boat motors) suddgest running 87 octain due to the low deposits it leaves on the top of the pistions, this is important because 2-stroke engines have alot of deposits because oil is mixed into the fuel to lubricate engine parts instead of having a crankcase with motor oil in it. I think your best bang for the buck is a 50 shot on a stock ex, it will be reliable if hooked up properly and not abused. By the time one spends the money on full exhaust, headers, intake and flash blinky lights they have already reached the price of a 50 shot, and the car will be much faster, quiter and get better fuel economy. Just my thoughts though. But to answer your question, no, 91 octain will just cost you 10 cents more a gallon. Hope this helps.

 
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Dyno of aem says 5.5 whp and then the sparks .1 hp and the exhaust 3 so about 8.6 more ponies

 
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Yea... Turbo doesn't work at all...

 
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Only if the person selecting the engine mods is ignorant of how an engine actually works.

 
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hahahaha

 
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You are maybe gonna see 2hp to the ground. I know it sucks but it sounds good right?