so like the freak I am, I have barely secured my header and am now already debating and researching what my next mod should be.

I'm pretty sure I'm going to do with cams/cam gears/valvetrain (maybe even wait and save so I can get minor port and polishand swirl 3angle valve job which the cams are being installed)next but the other option is nitrous which I always said I was going to do after I got my header on and tuned.

I've searched around the all motor and this forum but only found a few threads about these topics. But still questions are left unanswered so does anyone have any links to good articles about this stuff?

One big question is when the need for dual springs are needed? Right now I'm leaning towards the Skunk2P2 cams and valve train(call me old fashion or whatever but I highly believe in getting matching parts from the same manufacturer to be on the save side on this subject)

These are going to go into a H22a4 the only real compression bump would if I decide to go with either type S pistons or buckle down and sleeve it for forged but that wouldn't be for a long while.(I gather that milling the head is a bad idea with S2P2's)

The reason for holding off on the nitrous like I had planed is:

1. I know the nitrous refills are going to add up
2. After beating my friends WRX the all motor thing is really starting to grow on me(everyone and there moms are screaming turbo already at me as I'm an admitted boost freak)
3. Cams seem like the next sensiable N/A mod to after I/H/E + S300 tune
4. Don't want to blow up my motor.

Also anyone know how the skunk2 cams do with nitrous?

Thanks in advance

 

what's good for allmotor is generally good for nitrous. go ahead with that if you're willing to deal with the tuning and the refills.

FYI, honda uses dual valvesprings on all vtec engines. On an h22 you need to upgrade the valvetrain for anything other than stock cams or maybe type s if you're not revving much over the stock rev range.

Don't mill the head w/those cams, especially with stock pistons.

I think your plan is good, though if I was going to be putting money into an all motor h series again the first thing I would do is a 95mm crank.

edit: oh and also keep in mind that doing headwork will definitely get you power up top, but you'll most likely sacrifice some midrange for it.

 

See I don't want to lose too much midrange because this is a street car. Would you recommend just keeping the head stock or a light port and polish?

I don't mind losing a few horses in the midrange if the high end is greatly improved but if it's just basically shifting the power band up in the high RPMS then I rather by-pass that to keep the car more street-able.

why would you suggest the crank? I've touched on bottem end upgrades but haven't gone vary indepth with them as far as researching.

 

You can keep it simple with a stock JDM bottom end and Stage1 cams.
I wouldn't mess with the portwork at all.....Very expensive for what you get out of it on a mild build.
Skunk Stage1's are drop in with a stock valvetrain and made 12-14whp across the board on both of my Preludes.

I had great results with Skunk stage1's and Nitrous....
Made 267whp on a stock bottom end very conservatively.....went low 13's on drag radials my 1st/only time at the track with it.
Sure Nitrous fills add up but for the price of a Turbo kit installed you can do a Nitrous kit and still have tons of money left over.
The point I am at right now is I want to push the OEM bottom end to its limit before I spend the money on a bottom end build and expensive headwork.
I should be seeing 300whp+ in the very near future.......
Traction will be your biggest enemy...thus why I will be doing a 1-2-3 stage.
I can't imagine driving on the street with anything less than Drag Radials....

 

Even if I were to go with stage 1's I would still want to upgrade my valve train just for more piece of mind and I'm a pretty firm believer in any after market cam requires an after market valve train.

With that being said is there a mid-range advantage that the stage 1's have over the stage 2's that a predominately street car would enjoy? or is the major difference in the essential "need" to upgrade the valve train and therefore if you plan to upgrade the valve train might as well spend the extra 50 bucks to get the stage 2 and the increase performance?

 

NiR you said a stock bottom end. I am guessing you were speaking of a stock h22a4 bottom end. Correct. No jdm parts or anything right? In this case what mods did u do to the engine?

 

Didn't want to start a new topic:

I plan to upgrade my valve train so 'm figuring on the Pro series cams even the stage ones on a stock motor from this thread

seems to make awesome power and I'll be using a SMSP header so

ok so I'm figuring on the Skunk2 Pro series 1 or 2's

I'm leaning more towards the 1's because they seems the best for stock compression USDM motor.

Heres the questions that I can't really find a deffinet answer to.

Now If I go with the Pro series 1 and I do infact upgrade the bottom end down the line(type S pistons and researching crank options especially the H23 crank and rods) this will raise the compression will the series 1 be obsolete at that point?

Would it be better to get the 2's I know they won't work as well with stock compression as the 1's but if/when I do up the compression finally they will really shine.

I probably won't get around to the bottom end work for quite while so I'm really leaning to the 1's and if anything I can always swap out(prefer not too) to the 2's if they will really produce that much more power.

which plan sounds better?

Go for the pro series 1's then upgrade to the 2's if really needed when compression is raised.

OR

Go pro series 2's run them on stock compression for a little over a year probably

OR

Go for the pro series 1's and keep them in even after compression bump because the gains with the 2's aren't going to be that much more and probably just in the higher end?

Supporting mods at time of install w/ stock compression will be

AEM CAI w/BPI in stock CAI location
SMSP header
Magna flow highflow cat
Greddy SP2 catback
S300 tuned
w other stuff (homemade grounding kit) but thats the major stuff

other engine mods I would get before working on bottom end:
NX wet kit(for sure)

maybe
IM and 70mm TB port matched

I'm thinking option 3 but would like others opinions

As always thanks for your time and knowledge

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Fastkill &raquo;</TD></TR><TR><TD CLASS="quote">NiR you said a stock bottom end. I am guessing you were speaking of a stock h22a4 bottom end. Correct. No jdm parts or anything right? In this case what mods did u do to the engine?</TD></TR></TABLE>

Actually its a stock JDM H22A with no mods under the head......
Popped my stock H22A1 with some bad plugs and nitrous.....