Alright, I'm in this forum asking about my high compression d setup because it's impossible to get genuine advice in the EG/EK forums...

I'm in the process of building my d16y8 to 11.0:1cr (maybe SLIGHTLY less), with aggressive head work (Crower turbo cam recommended by Crower... and full valvetrain upgrade). How do I determine what injectors I'll need? I've been told to grab some DSM's as profuse as 440cc! I'm down to save a few bucks by using the DSM's rather than a new set of RC's or whatever, I just need to know the proper flow rate, and HOW TO INSTALL THEM, AND USE THEM. If anyone can find me a thread on the installation, I'd greatly appreciate it.

I'm hoping I won't need to use an AFC, and a good tune when I dyno will suffice. If I will need to, so be it, just let me know.

Also, if anyone wants to recommend appropriate spark plugs, feel free. I asked about these a few days ago and got a link to OEM injectors for a b series
. Right now, I'm thinking I'll just go with OEM NGK V-grooves.

 

An important part of selcting an injector is to be realistic about your power goals. If you use this calculator, it will get you in the ball part but in all honesty, I would think the stock 240cc injectors would work. They will flow enough to support around 180 whp I believe and I doubt a high compression single is going to make more that that without a lot of other upgrades as well you didn't mention.

Check here though (when RC's website comes back up) http://www.rceng.com/technical.htm#WORKSHEET

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CALC!_JUST_du_IT! &raquo;</TD></TR><TR><TD CLASS="quote">Crower turbo cam recommended by Crower.</TD></TR></TABLE>
Turbo motor? And get Hondata or Crome if you want the most out of your motor.

 

Thanks for that link. Huge help!!!

The rest of my setup includes:
AEM V2 cai, skunk2 IM, hondata IM gasket, skunk2 68mm tb, AEM adj cam gear, dc 4-1 header, obx test pipe, trust cat back exh, AEM fuel rail, b&m fpr (still set at stock 43.5 psi), accel 260cc/min injectors (for now... still think I'll need more), ACT clutchkit, ACT streetlite flywheel, pnp head with 3 angle valve job, Crower turbo cam springs and titanium retainers, skunk2 high comp valves, block bored to 0.020" over, JE forged rods, SRP forged 10.5:1 pistons, Cometic 0.027" head gasket (with the pistons and valves this should yield about 11.0:1cr, as the stock gasket thickness was 0.037").

WOW! I think that's about it. On an 80% duty cycle at 43.5 psi at the fuel rail, the calculator said I would need 297cc/min if I'm looking for 190hp at the CRANK. I think, realistically, I'll be around 180hp, but I'd rather slightly overshoot it.

I've found some DSM's that pour 310cc/min. Do those sound like they'll be too much/too little? I'd like a good how to on installing the DSM's on an OBDII civic. It still seems like that'll be that route I'm gonna take.

 

Auto DSM injectors (pink tops) are 390cc, I don't believe they make anything smaller than that man. The only problem with going too large is they are lazy at idle/low rpm or at least in my experience with huge injectors on turbo motors. These are really big at all though.

You would need a resistor box to wire the DSM's up but they can be found in junk yards for little to nothing OR, you could just search around and find some RC's for a good price. I got my RC 310's for 80 bucks from a local shop here I do a lot of business with, they were used but had been cleaned and flowed.


I noticed the turbo cam comment to, I have nothing to say about that just becuase I suppose they know more about making power than I do but it's not what I would go with.

 

No turbo, but still too hefty of a build for stock injectors. I plan on getting an OBDI ecu and having it tuned with crome or uberdata.

 

I've been looking for some used RC's for awhile. If I can find some in good condition, I'll use them.

As for that cam, I was uneasy about it too. But it can't really be dangerous, can it? (Anyone?)

 

You guys have helped a lot. Also, if any viewers were wondering about the DSM injector installation, I found this link: http://www.homemadeturbo.com/t...ctors/ .
It couldn't be simpler, so it seems.

 

I hate to be the one to rain on your parade, but stock injectors will be plenty for your setup. If you are expecting to see more than 180 whp you are going to be disappointed. It would make me happy if I was wrong though

 

It's as simple as it seems man, good luck with it.

 

I'm shooting for 180hp at the crank. The calculator estimated I'd need almost 300cc/min (the algorithm they use factors in desired bhp, not whp). I won't be dissapointed. The car was fun to drive with nothing more than cai, header, and suspension. The only reason I'm trying to estimate, or overestimate my potential bhp is to get the whole setup figured out by the time I send everything to the machine shop.

 

The ITR is rated higher than that at the crank factory and they use 240cc injectors man, the only reason I say this is the closer you are to stock, the easier/quicker which means cheaper to tune your car will be when getting it all right.

 

RC 310 injectors will work the best for your set up

 

You guys have good advice... I'm sold. But I got a set of accel 260cc/min for free! Maybe I'll use the stock 240's until I get her tuned. If they recommend slapping in the 260's, I'll have em handy.