ive got a D15B7 bottom end and block with a D16A6 head on it and it SMOKES like hell. i ran a compression check on each cylinder. i got 140 to 150 lbs across it. ive went throught 2 sets of spark plugs in 10 miles. theyre turnin black right off the bat. anybody know what might be wrong? the timing has been checked and it is correct. it lacks power and smells like oil thats burning.

 

replace your valveseals

 

thats what i figured but i wanted to see what other people thought first

 

2 sets of plugs in 10 miles? wow. are they all gettin fouled out or just certain ones?

 

all four of em were gone. i think a lawn mower is faster then my car. its a B7 bottom end and block with a A6 head. a Y8 intake with a LS throttle body. i had the stock flywheel shaved down to 12 lbs. underdrive crank pulley with 92-96 prelude injectors that are i beleave 350cc. i modified a 92-95 fuel rail to fit just cause its a cleaner look. all that work and the car motor was a terd.

 

Go back to stock 240 cc injectors.

 

You're running prelude injectors and you're wondering why you're blowing smoke? lol... Your smoke is a combination of unburnt fuel and burning oil. Your plugs are fouling because of the *** ton of fuel your dumping in there. Go back to stock and see how much you're still smoking.

 

i did change the injectors. it doesnt change. besides im gettin ready to tubo the car and go OBD1.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by obd1_crx &raquo;</TD></TR><TR><TD CLASS="quote">i did change the injectors. it doesnt change. besides im gettin ready to tubo the car and go OBD1. </TD></TR></TABLE>

The damage has already been done then.

 

what damage? thats im tryin to figure out

 

washing the rings out huh

 

what do you mean washing the rings out? im confussed

 

the fuel has washed away all of the oil on the piston rings lettin the oil into the combustion chamber therefor a **** ton of smoke. try this - put the smaller injectors back in, take out the spark plugs, squirt just a little bit of oil or ATF into the cylinders, put in fresh plugs and fire it up. it will smoke for a second or 2 but hopefully will get the rings to seal up. those injectors are way to big. put them back in when u need them. u definently dont need them now.

 

Who did the piston rings on this build? When you melt a piston it smokes. when rings are fried it smokes. If it's black smoke then we know it's oil. To much fuel and oil will foul out plugs. I have never seen that done in 10 miles but could happen. We can't be e- mechanics, the only way you will know is if you take it all apart and find out. We will never be right cause we can't see,touch or hear the motor.

Goodluck

 

the motor ran great when it came out of my buddys civic. the only thing i changed was the head. i already had one that was resurfaced so i used that one. i wanted to put all new gaskets on the motor cause the oil pan had a small leak and so did the valve cover. and being im about to turbo a pretty much stock motor... i didnt get big injectors really. the injectors were takin out with the first set of plugs. about the first four miles. the stock injectors were put back in. timing recheacked and still smokes like hell. the car barley runs after 6 more miles so i havent drivin it since.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by obd1_crx &raquo;</TD></TR><TR><TD CLASS="quote">the motor ran great when it came out of my buddys civic. the only thing i changed was the head. i already had one that was resurfaced so i used that one. i wanted to put all new gaskets on the motor cause the oil pan had a small leak and so did the valve cover. and being im about to turbo a pretty much stock motor... i didnt get big injectors really. the injectors were takin out with the first set of plugs. about the first four miles. the stock injectors were put back in. timing recheacked and still smokes like hell. the car barley runs after 6 more miles so i havent drivin it since.</TD></TR></TABLE>

Unbolt the motor change the rings and put the smaller injectors in. Make sure your PCV and all that stuffs good cause if it blows out it will oil your motor as well.

 

correct me if im wrong. the more air you pull in the more fuel you need right? 5mm bigger throttle body+ intake manifold matched to TB. so to me it seems as if im pulling in more air. besides... i changed the injectors after 4 miles. the stock ones made no difference even with new plugs. screw it... V-TEC here i come.

 

wow... good luck, you are DEFINITELY going to need it... and a new engine builder-tuner too

 

theres no replacement for displacement. so i bought another V-8. it tkes about $2000 to make about 300-400 hp. compared to $2000 making about 140-160 hp. ill always have and drive hondas but for money reasons... the camaro was the easiest and cheapest route.

 

lol can u run any richer?

 

"wow... good luck, you are DEFINITELY going to need it... and a new engine builder-tuner too"


as far as me being a new engine builder.... NO. ive built 2 chevy malibus. a 1979 and a 1980. a 1972 chevy nova and im helping my buddy on his 89 mustang. THOSE ARE REAL MUSCLE CARS CHRIS. ive also helped 3 of my buddies with there swaps and builds. a D16Y8 on 15lbs in a 92 hatch. a GSR on 10lbs into a 93 hatch and a B16 into a 89 crx. not a first time builder chris... just more use to V-8s instead of 4bangers.

 

If you think you can just pop in bigger fuel injectors and be fine, you don't know what you're doing.

If you don't know what washing down the walls means, you don't know what you're doing.

Don't get mad at us because you don't know what you're doing. Keep up with the "REAL MUSCLE CARS" because you obviously don't know how to do anything more than turn a wrench back and forth.

 

the problem can be easily solved. Keep your injectors. Buy hondata s200 and TUNE your injectors to what you need. problem solved.

 

If you think you can just pop in bigger fuel injectors and be fine, you don't know what you're doing.
If you don't know what washing down the walls means, you don't know what you're doing.

Don't get mad at us because you don't know what you're doing. Keep up with the "REAL MUSCLE CARS" because you obviously don't know how to do anything more than turn a wrench back and forth.

well see in V-8s... its hard to run rich. oh by the way buddy. you might not wanna say someone dont know what theyre doin if you dont know them. my all motor crx whipped my buddies single cam hatch on 15lbs. it took a lot of work to get my crx to do that. oh and that was a d15b2 not the d16a6 in my crx. if i wanted critsizim id ask Simon from american idol. i though honda-tech was a place for people to help each other out.oh yall all might wanna know that my buddy had eclipse 440cc injectors on the motor when he had it. same intake, throttle body, he had except his car is obd1 and thats not gonna make the difference.

the car is running again by the way yall with the prelude injectors in it now. valve seals made a big difference. i used my b2 head and found a b7 cam to go in it. and the motor is pretty stought to be all stock parts. im runnin a 99 SI at a local strip this weekend. ill let yall know how i do. thanks for everyones advice. i didnt mind advice... it was the sarcasm from some of the a$$ holes i didnt like and i dont think honda-tech really wants it here either.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by obd1_crx &raquo;</TD></TR><TR><TD CLASS="quote">If you think you can just pop in bigger fuel injectors and be fine, you don't know what you're doing.
If you don't know what washing down the walls means, you don't know what you're doing.

Don't get mad at us because you don't know what you're doing. Keep up with the "REAL MUSCLE CARS" because you obviously don't know how to do anything more than turn a wrench back and forth.

well see in V-8s... its hard to run rich. oh by the way buddy. you might not wanna say someone dont know what theyre doin if you dont know them. my all motor crx whipped my buddies single cam hatch on 15lbs. it took a lot of work to get my crx to do that. oh and that was a d15b2 not the d16a6 in my crx. if i wanted critsizim id ask Simon from american idol. i though honda-tech was a place for people to help each other out.oh yall all might wanna know that my buddy had eclipse 440cc injectors on the motor when he had it. same intake, throttle body, he had except his car is obd1 and thats not gonna make the difference.

the car is running again by the way yall with the prelude injectors in it now. valve seals made a big difference. i used my b2 head and found a b7 cam to go in it. and the motor is pretty stought to be all stock parts. im runnin a 99 SI at a local strip this weekend. ill let yall know how i do. thanks for everyones advice. i didnt mind advice... it was the sarcasm from some of the a$$ holes i didnt like and i dont think honda-tech really wants it here either.</TD></TR></TABLE>

Whether the motor is running or not, you don't need that large of injectors. Stock injectors are fine. you aren't making any more power with overly excessive amounts of fuel being pumped into your motor. The injectors you are running now are detrimental to the long term life of your motor. Precise air/fuel mixtures are the key to making power in these engines and i'd bet you have some pretty screwed up ones.