inspyral, can you explain this to me? i've heard that vtec is not good for FI engines... is that true or is this just a myth? if that is true... why would vtec be bad for turbo?

also, if i were to build a b18c5 to NA tune with ported to 2.0 using 2.0 b16a pistons.. would that still pass smog in cali?

 

FI engines usually see a dip in power at the point when the cam(s) switch over to the VTEC lobes, but that can be dealt with on a dyno. The only reason VTEC might be "bad" for for turbo is because it's another parameter that needs to be tuned.

If you're talking about a USDM B18C5, you shouldn't have a problem with emissions or smog legality. If you're talking about a JDM engine, they're technically not smog legal, but you might be able to get away with it if the smog station doesn't check the engine code. I would not bore a B18(81mm) block out to 2.0L(84mm) unless you're getting it resleeved first, because 84mm bore on stock B18 sleeves leaves the cylinder walls pretty thin. I'm not sure why you would want to use B16A pistons, since they're lower c/r than B18C5/B18C-R pistons. Whatever you do, as long as it's tuned well, it shouldn't have a problem passing emissions.

 

Okay, so what I'm hearing is by far the best route w/out going stand-alone, but having that option in the future, is an AFC w/DSM 450s, 40% trim until you can make it to the dyno and maybe a fuel pump later down the road.

What year Accords or CRXs? Is it one box or 4 individual ones for each injector? Also, should the injector clips be something that you should have the selling party include when you purchase them or are they a $.50 part you can pick up at the dealer?

Thanks,

Andrew

 

You can get a Hondata s100 with boost option for $445. Having fully mapped out fuel and timing definately sounds worth the extra $125 or so above the cost of an AFC. It just came out, which is why the AFC is still so popular. So yeah, you can spend $300 and it'll run "fine" or you can spend $445 and have it fully tuned. And you don't have a stupid-looking AFC cluttering up your interior.

As for the injectors, pretty much any 88-91 Honda will have the right resistor box. One box will run four injectors. You want the clips off of the DSM, which you can generally find being sold with the injectors.

 

Also, the Hondata actually has a boost fuel table, rather than the AFC, which will provide you will rpm based fuel adjustments only.

 

If he's OBD-II, he'd still need an OBD-I ECU and an adapter harness, which would add about $300 to his total cost. S100 with boost would definitely be the better option if he's OBD-I, but if he's OBD-II, then the AFC is ~$445 cheaper.

 

Yea, that's me

 

I went and looked for Mitsu injectors and found them in 390 (1G), 440 and 450 sizes. Am I only after the 450's or would a smaller size (say the 390s) work? Do I need to get them from an OBDII car or does it not matter?

Thanks,
Andrew

 

The 450s would be ideal because they'll leave you some room in case you want to go to a standalone and turn up the boost later on. For now, with the 450s, you can run them with up to 10lbs of boost without the need for a MAP limiting device(check valves, voltage clamp). If you run smaller injectors, you'll have to run those with less fuel trim(probably ~-30% or so), and that cuts the MAP signal less, so you can't run as much boost without a MAP limiting device. You don't need OBD-II injectors, just the clips to go with the DSMs and a resistor pack. Actually, if you can't find clips, you can just cut the little post in the middle of your stock injector clips off, and they should work fine with the DSMs. This might save you a couple bucks and the trouble of soldering the DSM clips onto your harness.

 

Tokyoracer - if you need an FMU (Vortech) and Wastegate (Turbonetics) please come see me. I have one sitting around for awhile that I would like to get rid of. I also have V-AFC/S-AFC's for dirt cheap ($300/$290 respecitvely) if that will help make the sale on the FMU & wastegate. please let me know if you're interested. I'm in Emeryville and Fremont... Thanks,

Gary
ghuang429@aol.com