So b18c1 block, b18c5 head, jdm pct b16b pistons. According to some other members and a compression calculator its about 13.0:1. I know the stock b16 injectors I have are to small so I was wondering what you guys would recommend. Motor is in a track car and will always be fed 110 octane gas. Road race car, not drag race just for reference. Thanks Guys.

 

Injector size dosen't really go by compression... more based on power levels.. for that setup I'd say some 310's or so.

 

Yea 310cc's were my original thought. I just wanted to make sure they weren't going to be to small. I figured I wouldn't need anymore than 370cc though. Thanks.

 

370 would work too. How will you tune it?

 

You can run 1500cc injectors as long as you have a method to tune.

 

Car is still obd0 and I'm not converting it to obd1 to tune it. Im going to throw in bigger injectors, get a wideband o2 with an exact number afr and keep an eye on it. probably after market fpr and fuel pressure gauge as well. To be able to mess with the fuel pressure a little bit.

 

Stock is just fine...

 

ya i mean.. who wants to do things correctly, lets just half *** it.

A FPR will only control so much, your wasting your time and money if you dont tune it correctly and you risk alot of other things..

Stock injectors are fine, if your able to tune it.. i run 440cc's on my 13.0cr b20vtec... again, i'll restate, convert it to obdI, its not hard.

 

Obdo has excellent tuning software available btw. Its called BRE. ALL MOTOR, have you ever used it? I love it, in fact, if BRE was avail for obd1 rpms, I would use that over crime pro anyday.

 

ya, you can also use ecucontrol or turboedit as well

your using software that hasn't been updated in 3 or 4 years.. at least crome was updated...

i used bre, to tune a few DA integras back in the day, i dont touch it now..another program i betaed.

If a OBD0 car comes to me and needs to be tuned, its converted to OBDI..otherwise i wont touch it.

 

Fair enough. However ive had 0 issues with bre, why update it? Never had the connection anomalies that are "normal" with crome pro.

 

I've never had any issues since 1.5.3+ with crome connection issues. With that said, there's a few reasons to swap from OBD0 to OBD1.

One main reason is the fact that you get more sensors to tune off of, and not to mention, coding is different.. as you know there was crome tuning issues in really , really early versions of crome.. and with that, alot of people forgot about the dwell ign coding, and uberdata's dwell ign correction from what i know its hit and miss.. I've tuned bolt on DA's with ls's and some XSi b16a swapped DA's with uberdata. Its good for that, but if you go indepth in your setup like turboing.. you need to upgrade.
Im a big supported of DIY, and PGMFI.org.. we all know that, i've said it a ton of times.. but i dont want people to get the idea that using outdated **** is ok..uberdata is wayyyyy outdated compared to crome.


Dont forget about B.R.E neither

 

I guess I'm over doing it, I was thinking of running ID750 or ID1000. Too much?

 

Im running the most up to date version of crome pro. And I receive connection errors. And what sensors are we talking about that are different? They both have iacv, tps, map, iat, o2, 4 injectors, knock, oil pressure, tdc sensor, cyp sensor, ckp sensor.....am I missing anything? Only difference between obd0 and obd 1 that I can think of is 4 wire vs. 1 wire o2.

 

And dizzy hookup. crome pro? or crome pro GOLD?

 

For the pure and simple reason that I dont want to put about another $1200plus in upgrades to be able to convert it to obd1 and be able to tune it. It is a car that has been tracked for over 9 years of its life and it is nearing the end of its life. In a year or so we are building up an integra shell that we have. This is just a matter of getting it to be good enought to last about 6 or 7 more races until the integra is done. It will be running full tuning software. Unlike the Crx. So unfortunately the crx has to get done half assed because It doesnt make sense to throw more time and money into something that will be taken appart in about a year so parts can be transferred over. The car is running a mugen ecu. Not a cheap ebay mugen chip. A real mugen ecu. The ecu ran a mildly modified b18c5 with rc 270cc injectors perfectly. If the car was going to be raced for at least 2 more years I would take the time to do it right, but at this point its not worth it. $150 for a conversion harness, $370 for an ecu with a hondata s100, $220 for a fuel rail, fuel pressure gauge, and fuel pressure regulator, at least $200 for injectors, $? for a obd1 distributor, $230 for a wideband air fuel system. I'm at almost $1200 before tuning costs and a distributor. I need someone to tell me how to half *** this and make it work, because I know how it should be done already. Converting it may not be hard but it costs a lot of money.

 

Stock didnt work out so well. The car was running so lean that the spark plugs blew up because there was no fuel left after combustion to cool the plugs.

 

OP,

All-motor is correct, OBD-1 is going to be the better than OBD-0. The only problem I had with BRE was trying to use large injectors on start up.

As for your cost, I don't know about $1200. You should spend more like $600 without tuning. Plus unless you plan to run a stand alone or the integra is already OBD-1, the only thing you will lose is the cost of a harness which is about $100 from any dealer on here. Everything you have to convert on car you can use on the new car. Also, I don't understand the comment about the wideband. If your car is running with a wideband then you can use it on Neptune. If the car is not using a wideband then why do you need now?

To convert my car, I used a chipped P28 tuned with Netpune, prelude 370 OBD-1 injectors, OBD-2 dizzy from a GSR, and LMA-2 wideband from innovative.

Also, if I were you, I would run the RDX injectors or ID1000s and E85. That will keep you from running lean and you will be able to run max timing and keep the engine cool.

 

Integra is going to run an AEM EMS system. Its safely tucked away in a box in the garage. The car doesnt have a wideband currently. I guess I should have given background. So long story short we took the car to the first race and it did fine through 4 practice sessions, but during qualifing all the spark plugs exploded to the point that the metal arm was gone and the electrode was no where to be found. The timing is set at a factory setting. It is not advanced some astronomical amount that would cause such a thing to happen. The only other thing that would cause the spark plugs to do what they did would be no fuel left after combustion to cool them down. For the record this is a road race car, not drag. The reason for putting in 310cc injectors and putting in an afr wideband meter is because I know the car needs more fuel. A slightly less modified untuned motor ran the same ecu on 270cc injectors and ran perfectly fine. I am putting in an innovative lm1 system as well. So the best I can really do is the wideband afr meter to see how far off from 14.07 the motor is with the 310cc injectors. If it is running a little rich I can put in a hotter temp spark plug and see if it is still rich. If it was still rich I would put on a fpr to turn town the fuel pressure a little bit. And vice-versa if the car was running lean. This is a cheap way for me to get the motor to run with a correct afr because I know everything else if fine. It is not running some crazy cams or anything like that so as I said the timing is factory because its only running the stock integra type r cams.

 

^^^High compresssion on small cams is a recipe for engine failure especially on stock timing and long periods of WOT operation. Without increasing overlap, you will most likely have another engine failure.

 

By increasing overlap do you mean increasing timing? And why is it a recipe for engine failure?

 

Wait a sec... how will a 10.8ish:1 comp LS with b16 pistons with built head and stock cams fair for break in untill I put in BC stage 2's and get it tuned? Not meaning to thread jack just curious?

 

1200 dollars to convert over???

You need a dizzy, new injectors and a obd1 ecu.. and wire in vtec, the dizzy / injectors can be found for little..
hell there are 440cc's around here for 120 and new oem dizzy run what, 160? you might spend 400 converting over..maybe..

Whatever dude, you posted asking for information, we're all giving you the route you should take.. you ARE half assing it... specially this high of compression.. i'd re think the setup if your going to stick with a OBD0 ecu..
All motor wise, you can make decent power using bre or turboedit.

 

No, overlap is the event when both the intake and exhaust valves are open at the same time. This will contaminant the intake charge with spent gases and increase its resistance to detonation. Also, yes you will need to adjust timing.

Lol. Look and at your engine and you tell me.

 

10.8 CR is not nearly the same situation as the OP of this thread.