Hey guys, just though I would chime in with a machinists point of view. Building 225-250 is not a problem with that engine. Building it to be streetable and pass CA emissions is another story entirely. Is this your daily driver? Do you know how much clutch pedal you will need to contain 225 HP and how tired your left leg will become when cruising around? Do you have plans for a computer and fuel system to handle it?

I can tell you that I did some mild port work, a good valve job, bumped the compression to 11:1 and the mildest cam above stock that Crower makes with new stock valvesprings on a customers D16Y8 picked him up over a half second in the 1/8 mile while frying his "high performance" clutch and getting no traction with the tires. I doubt the engine makes 155rwhp and he is just behind his buddies 4.6 mustang at the drags. This is a totally streetable combination using the stock computer and fuel system and was relatively low budget. A fully ported head (correctly done, not hogged out), a good cam and valve springs, and a really well done computer (Mugen) could easily bring the combo to 170-180+hp and still be plenty streetable. In my opinion, unless you add some kind of power booster, that is going to be about all you are going to reasonably get and still be good for a daily driver and might be able to pass smog tests.

 

Did I read that correctly, 155 rwhp??? You mean fwhp I would imagine, since the Civic is FWD. 2nd, it only takes an ACT heavy duty pressure plate to hold that 225+ hp with no problems at all, and the clutch pedal is not that stiff. But sure it's easy to fry a "performance" clutch as you called it if you don't know how to drive.

As for 225 whp, it's hard enough to get that out of a high compression 2.0L DOHC VTEC engine.

 

Nice to have another engine builder around.

I would just say that the Mugen chip is not what I would consider to be a "really well done computer." Basically it's tailored to a Formula 4 crate motor. There used to be a writeup on why exactly the program is not the greatest for street-driven cars but the page has been taken down. This is all academic however, since the only Mugen program out there is for B-series cars.

Oh and wazup, you're right about the stroke being 90 mm and not 95. My bad. I already said the largest a D block could be bored out to is 79 mm though.

 

rev, are you realy a mechanic? or are you just talkin :barf: out your :booty: ?

 

Well if you look at the site in his signature it appears that he is somehow affiliated with a machine shop that does a lot of business in domestic V8 motors, which would also explain the minor slipup of quoting horsepower at the rear wheels.

I personally don't mind having a machinist around to answer questions.

 

I guess I showed my habits with the "rwhp"! But no I am not a mechanic, I am a machinist an I try not to talk out of my a$$. I try to live by the adage that it is better to keep your mouth shut most of the time and let them think you are an idiot rather than open your mouth and confirm it (Unless you are pretty damn sure you are right). Like I said on another post, 75% of my work is domestic 2 valve, but over the last year or so I have been working on a significant number of 4 valve heads/engines and always trying to glean more info about them. There are a lot of knowledgable people out there but there are also a lot of misguided ones. Just trying to sort them out and give a hand.

 

Hmmm.... Seems like a smart way to go about things. Maybe I should try it, eh dub? Hehehe....