250 all motor is going to be hard anyway. Alot of building all motor. FI is easier to do. If you plan to build an all motor LS-VTEC plan on a BIG build. And even on LS-VTEC FI plan on a mild build

 

i have to agree with blake on this one. getting 250 whp isnt a easy task. if you are dead set at 250 whp,go FI, it would be a lot easier and cheaper.

 

250 will be work but can be done. John you know how I feel about under dogs and staying N/A. But if you went turbo you can reach that goel much easier. I know you can hit near 200 N/A with a good tune and build.

 

booost it

 

If you want 250whp on an NA motor then don't plan on having it as a daily driver, unless you have a credit card with a very high limit for just the price of gas it would cost to fuel that beast. Anyway, the idea of that sounds very tempting and if possible would be a very responsive motor and a blast to drive, however; I'd read up on MD's articles on flow and flow velocity to see if your goal is even possible or realistic. Sure you could bore it out to 2.0 liters and run 13:1 compression ratio, but I don't think you'd want to have to drive 30-45 miles to hallett just to get gas that has a high enough octane.

That's just my 2 cents. I'm with you on staying NA and I hope your build goes well. Also, don't forget about thinking how high you want this engine to rev and where you want your powerband to be. Then you also have to consider which transmission you'll need to keep you in the powerband. It may be necessary to have custom gearing to meet your needs.

Sean

 

I agree with sean. Bore and stroke the *****. High comp pistons. Forged internals good cams. and most importantly TUNE! Now if you go true all motor and decide on ITB's thats where price will hit you. Because to get the best tuning on ITB's you would have to get a stand alone tuning program I.E AEM EMS. It gets way expensive doing it but IMO could be lots of fun.

As far as gas goes. Yeah you would need race gas. High comp = high octane. There is a place in Broken Arrow that sells race gas dont know the price but as far as Tulsa/BA area there is that place.

So if you want quick and easy numbers and still be able to drive your car daily go Turbo/Supercharged. That is the best way to get there hands down.(Besides you could still use pump premiem if you go Turbo/Supercharged)

 

I know that you're just using AEM EMS as an example so don't take offense to this. For the money, I'd invest in the new Hondata S300. It's Hondata's first plug and play system that lets you hook up your computer directly to the ECM and datalog. Every setting can be changed w/o having to "burn" a new chip and using a guess and check type tuining. For only $600 I think it's on of the most beneficial and economical stand alone engine management programs. And yes, ITB would be extremely helpful, especially on the B series. Just realize that with Oklahoma's constantly changing weather you'd have to tune it very often to accomodate for the different atmospheric pressures, humidity, etc. if you wanted it to run at its most effecient.

Sean

 

I agree with Sean if you want to hit 250. Even if you came close to 200 you could use it as a daily driver and 200 is much easier to get then 250. Bore the block 2 over run b16 pistons, they can handle boost around 10psi have been told they can hold 15psi. Stock rods can handle up to 300hp so I say cost wise stick with those or you can go aftermarket it's your build so do what you think is best. Then get some cam's that are good for the CR and good head internals. There are other things like fuel injectors, IM, headers, intake, even the little things make a difference to hit your goel. But 200 is more realistic then 250 N/A IMO. I know you can get much closer to 200 then 250 and still keep it for a daily driver. 200hp is good power for a b18a and will be a very fast and fun ride.

 

Cool! Thanks everyone! Sounds like I'm going to go for the 200 goal, and then use a turbo to get the rest! That way I can still use it for a daily driver! Thanks again!

 

200 all motor LS-VTEC should be easy if built and tuned right