So, this coming summer I'm planning on pulling the B-series out of the integra and building it for boost. My goal is 250whp. I don't plan on going over 12psi of boost, and I was wondering how I should build my motor for it. And before you ask, yes I am buying an eBay turbo kit, as I am in high school and work a minimum wage job, that being said I still want to build the engine and make it somewhat legitimate.

I plan to use:
Oem camshaft
forged pistons
Oem rods
resurface the head (non-vtech)
new head gasket
skunk 2 intake manifold
re do timing belt
(when I say oem, I'm going to buy brand new parts, just stock)

also I plan to delete
Ac
power steering
and heater core

the turbo kit I'm getting has the t3:t4 turbo
I'm going to have to switch the radiator out for a half Rad to make room for the manifold.

this is my plan as if now, any suggestions on what else to do? Or things I put on that are uneccesary?
Also the fuel management unit I'm running is an fmu (DONT HATE)

thanks!

 

Honestly if your on a strict budget and only looking for 250whp, a stock engine will do fine. Don't need anything fancy for 250, just a healthy stock B18. If I were you I would take some of the money I was going to use for forged internals and buy a VTEC head and LSV components. At roughly 10psi on a t3/t04e style turbo you can get around 300whp that way and response will be excellent as well as carrying power much longer than the LS would. Even without that though, a stock B18a/b is a good platform for 250-280whp. Just use a 50-56 trim t3/t4 hybrid or if you can swing it something like a "disco potato" gt2860 or even gt2871 are excellent turbos on stock engines. Aside from that, make sure you have a catch can setup of some sort. Doesn't have to be fancy but you need it. Also ARP head studs and a fresh OEM head gasket would be a good idea especially if the mileage on the current head gasket is unknown. Your going to be cramming pressure in there so you want a nice seal, and ARPs + new head gasket is cheap insurance towards future headaches. For fuel you don't need anything crazy, a stock 190lph Denso Type R pump will be nice and quiet, reliable and flow plenty. For injectors, DSM 450s are usually cheap and effective at that power level as are RDX 440s. This is if you plan to run gasoline, if E85 is your plan then 750-1000CC IDs or something similar would get the nod. (E85 takes a lot of fuel) Lastly, and probably most importantly is engine management. Something inexpensive like a chipped P28 and crome will suffice, but I HIGHLY recommended something like S300 or Neptune especially if this is gonna be a daily driver. The capabilities with those two far exceed Crome by a large margin and enable you to tune 100% accurately and with a wide margin of " safety net". Do NOT run your turbo car on a basemap or chip from someone else's build. Good luck. After you get the engine sorted I reccomend brake and suspension upgrades. Stock components on 2G Tegs aren't exactly made for double to triple the original power rating haha. Good luck.

 

One thing I forgot to mention, manifold and wastegate. Since your running low boost you will want a good gate like Tial etc no eBay junk otherwise you will get spikes. For a manifold, a simple cast iron log will work at this power level but will be much more efficient with a tubular manifold such as a mini ramhorn. The B series doesn't like to be choked at the header. For downpipe size, 2.5" will work for this power level but if you can swing it a 3" down pipe and 3" exhaust will really compliment the extra air from the turbo.

 

Ok so what if I bumped up my goal from 250 to 350whp? Would I still be able to reach that with a (mostly stock motor) with just head studs and a new gasket? Or would I need pistons and rods at that point?

 

You're looking at spending a lot more time and money than you think. I would HIGHLY recommend you get a used garret turbo, or hell, get one off an old diesel truck, but don't get an eBay turbo. An eBay kit, would be OK, but you really don't want that cheap turbo. They don't last. In a year you'll be replacing it. If you intend to get high quality internals, by the time you're done, the last thing you want to top it off with is a cheap turbo. It would cost you a lot less money to get a lightweight flywheel, which is guaranteed instant horsepower without even needing a tune! Also, if you're dead set on turbo, start with brakes, suspension, and axles. All that extra power isn't going to be any good if you can't stop!