Ok so now that i know that i have a 9.6:1 compression on my b20 (p8r head), I am looking into cams. Crower 402's have got my attention since im looking into mid-range to top-end power. My goal is 160ish whp, would i be able to get there or more with this cams?
I know that upgrading compression is best for cams, but i dont want to get pistons and all that. I believe I am on the right track since i upgraded the intake system with a short ram intake, itr throttle body (62mm), a blox intake manifold (type-r style im) and some itr replica headers.
When installing this cams, would i need to do something else to get better results ? Other than cam gears and tunning you know like...
Slightly Porting and polishing the head or just get better cams like the 403's (I honestly dont want the 403's since im looking into mid-range power).

Also, i was thinking into port-matching an ls intake manifold, instead of having the blox IM i curruntly run, but im afraid port matching an ls intake manifold would be an obstacle to the power im trying to reach.

anybody???

if you run cams, keep that itr clone intake manifold it will help.

are those the stage 1's?

and also, hitting 160whp w/out pistons wont happen (95% sure)

Yes there are the stage 1 cams from crower.
Upgrading pistons is a pain in the neck to me...which pistons would you suggest? compression? brand? any cheap one out there?
Thank you.

well i mean a cast ITR clone piston would be good...im not sure who makes them but i know they are on the cheaper side

good pick on the crower 2's. they sound mean and give good results. I havent gotten my car tuned yet but ill let ya know the numbers

Alright thanks im gonna look on them.

Hey have you heard of Y.C.P. pistons? they come with npr piston rings, they are cheap and will bump my compression a bit. Should i get piston rods as well?
Im not planning to rev hard or do a crazy build.

i'm using ycp itr pistons in my b18. not a complaint here.

if you're going through the hassle of installing new pstons, i will strongly suggest that you also invest in arp rod bolts. cheap insurance against fragile oem bolts.

just shotpeen your stock rods and u'll be good to go. cheap

oh yeah and with these cams, you need to pretty much get ur ecu chipped right away cuz when i installed mine, it was throwin the camshaft positioning sensor code and would die when i push the clutch in. Then i got the Phearable.net ecu and fired right up and havnt had a problem, just running rich cuz of the conservative basemap in the ecu.

if u are getting pistons get JDM p30's those are the weapon of choice in the non-vtec world and the piston rods will be fine but do get the ARP rod bolts those are the weak point in bottom end so the p30's and the crower 402 you will have a nice little set up but in my opinion go with the 403 you will still have mid range and high end as well you will be able to beat the GSR'S out there but that is just my 2 cents good luck with the build

What is you budget? You could save some money and go with delta regrinded cams. Also I have a jdm b20b 9.2-1 and dyno'd at 141 tothe wheels so your p8r 9.6-1 with a pair of 272 regrinds should pull 160+. if it doesn't shave the head .025 and you'll have almost 11.1-1. Remember your head flows almost as good as a vtec head it has the same valve size. Just don't rev the shit out of it with out rod bolts and valve springs.




Edit: delta regrinds are like 200 bucks shipped.

Great info sps21112!! Which valve springs do you recommend with this cams?
Also would it be a good idea to shave the head 0.025 with the crower 402s? 402s are not that crazy.
Honda says to mill the head 0.010 when doing maintenance on a b18b head, and to not go further than 0.045. So if a shave the head 0.020, put some 402's,cam gears and tune it i will be fine right?

I think that if i take the piston route i will get the 403s instead (with valvetrain) since im already spending the money ... now corcerning the pistons...aren't the p30 pistons 81mm? I think they won't fit my b20 block since my bore is 84mm.... also if i get a set of 84mm ycp pistons, would they need any modification to make them fit to the stock rods? (besides arp bolt rods).

my bad bro i miss read u you did say u had a b20 then yah u have to get an aftermarket piston

402's are a waste of money. I was looking into them before I went Vtec. Was shown some dyno results form tuning and 402's, the cams only made 5hp and all in the top end. For the money a Vtec head is a better way to make 160wp. My B18B1stock w/ B16 head and stock cams made 161whp. I would go that way or get valve springs and 403's, TB, intake mani and a good header like a Hytech style. Oh and tuning of coarse.

403's will be! Im looking into the ycp gsr/itr replica pistons (84mm). My concern is besides the arp rod bolts, is there anything that it needs to be done to the pistons or the connecting rods to make them fit? Would they fit without any problem? ( besides shotpeening too). Or is there any connecting rod you guys recommend to use with this pistons? I think it makes sense to spend the money there and do it right once since im already opening the engine you know.

Use the Ls rods, you will need new rings and have the cylinders honed for the new pistons. If you have the funds bet the bottom end balanced.

Ok guys so i got pretty much all the components that i need to install the crower 403 cams (dual valve springs & retainers, arp rod bolts, cam gears, + walbro 255 fuel pump). My concern is on how am i going to bump up the compression on my engine... I have been doing a research about shaving the head or putting a single layer head gasket, but looking back on this post and using a compression calculator i do not see how could i get 11:1.1 compression by shaving the head by .025". I am using this calculator http://www.zealautowerks.com/bseries.html
The results i got for my engine were:
-Shaving the head by .020'' i will get 10.13:1 effective & static compression ratio.
-Using a single layer head gasket and not shaving the head i will get 10.04:1. effective & static compression ratio.

What would you guys recommend to do so that i could get the best results with these cams? Shave the head or use a one layer head gasket?
I am definitely taking my car to a very reliable machine shop and if i shave the head i will change the head gasket to an oem/3 layer new head gasket since im already there.