Hi, i want to know if a Fuel pressure regulator will give more response?I've a d15z4 non vtec.

I dont want to get into duty cycle of injectors and and the whole debate on honda injectors and there flow capacity. I see from your pic an intake and exhaust, and isnt your head shaved 30? and what was the compressd height of the head gasket used when the head was put back on? im just tryin to figure your compresssion raise and if there is a need for cam timing adj, but n any case it wont hurt to already have the regulator in place so when the need for added fuel is in demand u can dial her in. if u have air/fuel gauge and fuel pressure gauge makes tuning it alot easier, if not either way give it more pressure and base it on the throttle responce give it what it likes, it may need some timing, u just have too tune a litttle, and if nothin else it will look good on an already nice lookin engine lol.

i don't see a pic? i wanna see

I don't know the compressed heights,the previous owner used a Honda factory headgasket,i.e same thickness of the standard headgasket.I wonder what he did more to the cylinder head other than shaving the head only.Maybe a port machining also,i don't know.
If i get a adjustable cam gear,will i need the fpr also?When you talk about the air/fuel ratio,do you think a Apexi vafc will do the job?

Here it is

running a stock engine theres no real call for an fpr, but if your not sure whats been done to the engine it couldnt hurt to put an fpr on and add some pressure and see if the engine benifits from it.Adj cam gears will just put your cam timing back were its supposed to be and u will binifit a little from that, an Apexi will do just fine, ur setup will benifit from mpfi as well

ok,i'll try both the fpr and the adj cam gr.thank you.

Too be honest the best mod i have ever done that i could see the most benifit from just a bolt on was my 8lb flywheel, i did a 8lb stage 3 clutch 6 puck 10mm larger disc (overkill bigtime) and pressure plate and i love it, now it takes some getting used too as a daily because theres no in between u r either in or out of gear, its hell in the rain. and ive killed 2 tranny's with it in 6 months but i luanch my car at 7000 when i run it, if u have to pull that motor for n e reason get a flywheel you will thank me. with my crank work underdrive pulley(dont recomend on a daily) and flywheel my zc dam near revs as fast as my buddy's GSXR 600, but def get u a adj gear do that first, got a nice little setup there, best of luck!

Anything that will make the engine faster in a 1/4 mile,i'll invest massively,but will never boost it.I like NA.The fidanza stage 2 is a nice product i can buy,accompanied with a lightweight flywheel.I'll keep informing you when i am gradually doing the mods.thank you for your suggestions.

If its 1/4 times your after, what type tranny is in the car? And how much weight r u willing to sacrifice? When it comes down to it IMO weight is the key factor in a D N/A build, my engine is built but it's still the weight reduction that makes my rex mean.
What year is your car? And what R u willing to give up for times? every 100lbs is 1/10 of a second aprox. R u willing to consider a small shot of Nitrous for track use?

Am running with a stock s40 transmission,year 97 civic sedan.I don't have any idea of reducing the bodyweight as its a family car.
Now i am planning to change my Final drive and buy the fidanza clutch kit stage 2 and the lightweight flywheel.