thinkin bout putting a type r in my civic.. i want to build it 250 whp but keep it n/a .. can i do it?

bore out to 2.0L
port and polish
i/h/e
cams, springs, retainers
valves?
higher compression pistons
sleeve block ??
stock connecting rods?
stock crank?
plugs, wires, injectors?
intake manifold
lightened flywheel

is it better to go type r? or gs-r?
im keeping it n/a and i want it to be fast in a straight line and be on rails in autocross

 

You wont see 250whp with those mods it is going to take a lot more than that.

I'd start off with a gsr swap since you are going to be building the shit out of it and its cheaper. Start with:
balanced and blueprinted block.
make it 2.0
aebs sleeves
some aftermarket rods, ie crower
itr crank
some good pistons like je 84.5mm to bump the comp.
port and polish
some serious cams, toda, jun, etc
larger injectors
upgrade the fuel system; rail, pump
head gasket
larger throttle body
a good header; hytech, ericks racing
upgrade ignition; wires, coil
upgrade the tranny

and also some serious tuning. I'd go with hondata and a chipped ecu like a p28. It will not be cheap at all. I bet all that stuff will get you around 220-230whp. You may also want to look into itbs, they are nice.

 

There is a 200 whp build up in RPM? magazine last month. Took all that TXHATCH suggested and then some to get 208 N/A whp out of a B16. Trick velocity stack intake and head milling I think. Though you are talking about a B18, but 220-230 whp will not be cheap either way.

 

250 is a lot of WHP for an all motor app, it can be done though.


I say, LS block, 85mm sleeves, RW pistons, Crower rods, and build the head with some high duration cams, hondata, Jspec ITR tranny, you should do pretty good in a light car..less than 2k in weight.