LobeSex

starting to build my h23 this is wat I've got so far....
1.CROWER STAGE 3 cams
2.Rocketmotorsports valvetrain
3.ARP head studs and main studs
4.Exedy clutch and Fidanza lightweight flywheel
5.MeganRacing light weight crank pulley
6.Full exhaust w/o CAT
7.Intake, aftermarket plugs and wires

let me know wat yall think about the build ill keep yall posted wit pics and hopefully a vid wen I get it tuned....also do any of yall know where exactly in houston stoopid tuning is?

98vtec

my opinion:
lose the megan crank pulley
if its a street car, run a high flow cat
arp main studs will require a line hone of the mains with them installed and torqued to spec

i was unaware that rocket made valvetrain for the h23 head. Those cams are going to want some compression. What about allowing the engine to breathe? header? intake manifold? head machining?

no offense, but it looks like you are just throwing parts together without giving it much thought.

BLUBB2

What wrong with using the Crower valvetrain?
Also,dont forget the fuel department such as bigger fuel injectors and Walbro 255lph fuel pump.
Last but no least a chipped ECU and a reputable tuner.

PirateMcFred

BluBB2, Crower VT is around $400. The cams don't cost that much. That's what's wrong with Crower VT.

OP, Who's going to do your tuning? As soon as you install those cams the car will be undriveable on stock ECU. You will want more compression to run those cams too. Depending on how light you get your flywheel you might have interesting issues to keep the car idling at a normal RPM due to the lope at idle. H23 on cams is a tuning adventure I'll say.

Blake, you have to give the guy a little credit for even considering building an H23. My build is essentially a high compression 88mm H23 with most everything stock. Tuning, compression, crappy header like I've got got me an easy 190whp and great midrange.

Pirate

LobeSex

my buddys running the same set up and his car is doing just fine and he got his tune from u pirate so I have faith

LobeSex

and yes I do have header, high flow cat, intake...thinkin about puttin some h22 pistons I have in and I'm just gettin sum basic machining from the local shop

meanshyguy

I'd say get the H22 pistons, I happen to have some for sale, and tell the machine shop to shave the head .030mm. that's the most you can shave anyways, I was running this setup and worked fine.

LobeSex

finally got the build done will have some pics and video up soon just need to get rid of my surging idle

PirateMcFred

Cool! You have the Crower 3s? Does it surge with sort of a gasping sound? Do you still have the "starting air valve" on the front of the IM towards the driver's side? If you do remove it. It took me months to figure that one out. I used a 20 ton press to fix that POS. lol.

Pirate

dk4ever

Don't know if this will help you but it helped me. http://www.bsperformance.com/compcalc/compcalc.htm

Here's the setup I'm planning on running:
Mahle motorsports 10:1 compression H22 pistons (equals 11.8:1 in an H23)
Crower Stage 2 Cams
H22 dual valvesprings & retainers
DC Header
Magnaflow High flow cat
Custom 3 inch exhaust
68-70mm Skunk2 Throttle Body
AEM 5th Gen 3" Cold air-Intake
Unorthodox Racing Pulley kit
4th Gen H22 injectors
Walbro 255 fuel pump
160 degree thermostat
Skunk2 cam gears
Ls ecu tuned with Hondata
Competition Stage 2 Clutch
Competition Ultralight-weight flywheel
M2f4 H22 Tranny
FM short shifter

LobeSex

Yes crower 3's, will pluging the vacum hoses on it do the same cuz i just tried that and it still does it but i think i know wat the prob mite b....my gasket for where the header meets the downpipe is spewing exhaust rowdy so that would screw up the o2 sensor reading rite, therefor throwing my idle out of wack?

PirateMcFred

remove # 14 and put a plate over it.

PirateMcFred

If you don't have a plate send me $7 and I'll send you one in the mail.

It's was a very frustrating surge that would not go away. Remove the starting air valve and it goes away.

dk4ever

Wow. Interesting fact. I didn't know that. What all needed to be done in order for the cams to NOT cause piston to valve contact? And an even better question, can you pass emissions? I thought about those but decided against them for emissions related reasons.

PirateMcFred

What? Crower 3s? Yeah they are probably not very emissions friendly unless you have a 22" catylitic converter and a 3000 rpm "idle."

I don't think you'll have much issue with the annoying Idle surge the Crower 3s produce and I would be surprised if you have any piston to valve contact issues with the smaller cams either unless you do something silly with adjustable cam gears.

As for the starting air valve it's not needed. The JDM H22s don't even have them. With real big cams that have a high manifold pressure at idle you get a surge from the SAV since it is normally open to let air in as you start the engine. Once the engine is running the vacuum holds it closed. With the big cams there's a threshold where the starting air valve will close and the rpms will drop which affects the manifold pressure which opens the SAV which lets in more air which kicks up the idle RPM which lowers the IM pressrure that closes the SAV which drops the idle rpms that raises the manifold pressure and opens the SAV which lets in more air which kicks up the RPM... Goddamned surge. I spent months tracking that down. When I found the issue I had to photograph the victory over that stupid device:

http://i39.tinypic.com/2096nfl.jpg

mattsnooz

LOL Pirate.

You smashed it...you smashed it goooood!!

LobeSex

alrite so i just took the hose off of my SAV and it helped alot cuz it was surging from like 1000rpm to ver 3000rpm! now it drops and jumps back up from like 300rpm to 1200rpm so almost done its not as noticable then b4...but i have a new ? wen i take off in 1st and 2nd gear at about 3000rpm and up it starts to sputter like kind of a jerking any ideas? im sure it mite b something to do with tuning and also with my setup wat spark plugs and heat range would u recommend i believe im running ngk laser platinum's...any help apprieciated!

LobeSex

anybody?? plz!!!

LobeSex

nobody has any ideas?