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Ok i have a friend that says he will put down 225whp with his civic 1999 si , with it/h/e ECU , and build his hi end of the motor. also hes not gonna strip interior. i told him there was no way he would get that amount of whp going n/a , but this guy is absolutly serious he can do it. , and im not a expert on the b16 engine , but i really doubt it can be done going n/a. am i right ? or can my friend have hopes , and dreams only?

 
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you like posting twice?

 
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toda ITB's are dynoed (properly tuned, mind you) to 40 hp! i'm running a b20z with a b16 head in my crx and only putting down 217 to the wheels, but torque is 158 ft. lbs.!
but anyway, cams ported head, higher comp. pistons and ITB's, he might be able to pull 225 hp.....?....

 
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ull easily pull off 225whp with a b16 n/a, if u know what ur doing. but did ur friend say that he could do it with just intake/header/exhaust and ECU? or 225WHP with the built top end too?

 
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bore and stroker kit, cams, pistons, valve job, ported head, intake manifold. he might be able to pull it off. See he probally can take it up there but the engine's life with suffer everything is a trade off.

 
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by the way, what does stripping the interior have to do with horsepower?...

 
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^ u wont need a bore/stroker kit and no the engines life wouldnt suffer. get a type-r intake manifold, a good header/exhaust combo, new cams, ECU mod, ported head, and maybe higher compression pistons.

 
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actually if u bore and stoke it it will affect the engine life because the wear and tear on the engine is increase and the amount of metal in the cylinders has been reduced which would affect the engine life

 
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If you consider nitrous NA, then sure.

If he did get it up to 225WHP (~250hp @ the crank) he'd have a camshaft so extreme he wouldn't be able to make the damn thing idle below 4000rpm.

 
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right, but im saying u dont have to bore/stroke it.

 
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actually stroking it makes it stronger...but you're right to a certain to a point, it depends on how good the build is and how they use the power...

 
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the engine life thing is mainly the boreing... strokeing can affect it but if done properly it wouldn't really make a diff

 
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with the right equipment and money, b16a2's (99-00 si) can pull 200+ horses going n/a. that was a serious civic and probably the best ever that went into production in the states imo. major companies like apexi, skunk2, toda, mugen, spoon, dc etc make very good parts for that car that are power proven

 
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225 easy. No doubt. It cost a bit, and there are cars that have that much power new, but yes, it is possible. Just a little more mods than originally stated.

300 NA is probably a stretch.

 
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Im gonna call BS on your friends claim

225 whp is possible, but it requires alot more that i/h/e and an ECU

 
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http://importtuner.com/tech/0102it_civicsi/

i/h/e put down a whopping 152.6 whp

 
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Wow a whopping 11.5 hp with all those mods.

 
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tell me about it.

Hmm, I think its probably possible but waaaaaaay to much cash to throw down, might aswell save it up and go turbo.

Look at it like this, he wants 225whp, the sI in stock forum dyno's about 135whp, so he's gonna need atleast 90whp. He got 12whp total from I/H/E. Now he needs 78whp going N/A... he'll need alot of internal work done, and even than... it might be a lil far featched. Tell ya friends he's throwing away alot of money...

 
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hmm, if he ran race gas with a compression of 14:1 its soo possible.

 
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no way he's goin to achieve that with N/A set up on a b16.. i have never seen it done at least with a b16..

 
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11hp would be nice to have. if i knew i would get that much hp, then i'd invest into some header, cat, and exhaust

 
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Thanks for your guys reply's he did say he was gonna build the top end , and leave the bottom end alone. also he said something about having a intake throttle? i also doubt the 225whp i told him he might get 200whp that more realistic , but who knows

 
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yes , but he said something other than intake. something about single intake throttle body. i forgot the name of that mod

 
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individual throttle body?

 
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i think the only possible way to do get 225 hp NA is to dump a huge amount of money to build up the internals, increase the compression a lot, fully rework of the valve springs, camshafts, lubrication, so that you can bring the redline and peak power up to over 10,000 rpm. By then the engine would not be very streetable. Anyway I was just thinking about Takumi's 11k rpm engine.

 
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He says that he built the high end of the motor. Could that mean he changed something like cams, or head or maybe got a regrind or something.

Someone metioned individual throttle bodies. On those old american muscle cars with carburated engines they had these huge things sticking out the hoods with the cylindrical pipes, are those the ITB's? Is it difficult to have our fuel injected d17a2 with ITBs? Will the car idle the same, will it be just as easy to drive in the street? I heard it is the best way to expose a lot of power form NA cars.

 
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I have a 2000 Si its possible, some money is involved but definetly possible!!!

 
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ok well guys tanks for the replys the reson for these questions is he think he can take my 2004 5-speed rsx TURBO stage 1 , putting out 250whp at 8psi
i guess we will find out , and see . i told him it was easier to put out those #'s going turbo , but hes those guys that like it the hard way of doing things no offence to the n/a guys.