Dc2_richard

I have a b20b block and a p8r head am looking for around 170 to 200hp what do I need to upgrade

I got Ycp 84mm pistons

rc 370 injectors

hondaracing84

iTrader: (1)

Better cylinder head first off, go b20vtec. The vtec head outflows the non vtec heads easy. Plus the compression chamber volume is smaller than the non-vtec head. GSR is 41.6cc and the non-vtec is 45cc. Which that alone will result in more compression.
Second, get a good set of cams. I have experience with Kelford and TB autoworx cams. But, I was shooting for the moon, so I had their biggest custom cams. TB and kelford however do have stg 1 or 2 cams that are streetable and should get you to your goal. Also skunk2 tuner series is great for the street. And adjustable cam gears to dial the cams in.
Next, a good intake manifold like the skunk2 pro series and throttlebody. For your power goals, anything bigger is not needed and will actually hurt you.
Good name brand header with good exhaust.
You already have the fuel, just make sure your pump is up to the task.
I don't know what the ycp pistons are for compression, but you might look into higher compression pistons. Depending on the fuel available to you, 11.5:1 or up to 12:1. I think some go higher, but you have to have a good tune and fuel.
Which leads me to my last point, good engine management (hondata s300 minimum) and a really good tune. The tune will make or break your goals.

k20z1ej1

why didnt you just respond to the replies in your other thread?

spAdam

iTrader: (1)

If I'm reading your thread title correctly, putting a vtec head on the engine automatically violates the plan of your project.

P8R head actually has 47cc chambers, not 45. The extra 2cc comes from them being 84mm diameter instead of 81mm. You also get larger intake valves from the old prelude B20A.The P8R head responds very well to a good valve job and de-shrouding.

Pick your compression after you pick your cam if you can. Too much compression on a small cam and you'll be knock limited, not enough compression on a big cam and you'll never get it to breathe efficiently. I would suggest overboring to 84.5, if your block needs anything other than a very light hone you're already nearing the service limit. If you plan on driving it on the street with pump gas you'll need to be conservative with your compression. If you are subjected to the awful **** water that California passes off as fuel you'll need to be even more conservative. More importantly, you need to STOP thinking about static compression and start thinking in terms of dynamic compression. Too many people on this site talk compression without any mention of what cams are going in or what the bottom end geometry is. Start here: Dynamic CR

Measure everything. Size your bearings correctly. Replace your valve guides if it's needed. Balance anything that spins. 170 is totally doable... 200 whp is quite a bit for this combo, but it's doable. You're going to have to be very aggressive and very detailed in your build if you want to pull it off. Drivability is probably going to suck with the non-vtec setup.

Get better injectors. We're almost 30 years past the technology that RC is still selling. Look into the Bosch EV14 type injectors that are out there (Injector Dynamics, Fuel Injector Clinic, etc

Don't skimp on engine management. You're not tuning this thing on CROME free, get that out of your head now.

JDMBrian

A very brief post, but I have a simple non vtec setup that made 192HP to the wheels, on pump gas! BC stage 2 cams, gasket port Pr4, 12.3 c/r 84mm bottom end, with a chocking ebay OBX intake manifold/70mm throttle body. 440cc RC injectors/Hondata s300. Bigger intake manifold would yield me close to 200 or over 200 with better gas.