well i posted awhile ago that i would be going to get my b18 fitted with hondata and dyno tuned. well im done now. and i am very unimpressed.

i know everyone is gonna ask what i have done so here is the mod list again.

-B18c
-11.5/1 compression
-forged pistons and rods
-port polished head
-full ferrea valve train, stainless valves and dual titanium valve springs.
-crower stage 2 cams
-aem adjustable cam gears
-hondata s200
-310cc injectors
-walboro 255 lph fuel pump
-underdrive pulley
-short ram intake
-full apexi n1 exhaust


think thats about it underthe hood. and all this is in a 99 civic dx.


alrite heres the story.

it put out 150whp. and 111ft/ibs torque. im very dissapointed as this set up should net me in the neighbourhood of 200whp.
i spent about 6g on the engine and gained 5hp over a stock b18.

the dyno chart is weird though. it is a nice steady power climb until it hits vtec. then it just goes squirlley. up and down repeatedly.

as well, vtec had to be setr at 6k rpm. the tuner said that whenever they tried to give it fuel up top, the power just went for ****.

im thinking there may be a problem with the injectors. it misses quite often. u can watch on the airfuel gauge as im driving at a sdteady speed. under light throttle. the mixture constantly dips to the lean side. and u can feel the miss each time it does this. not sure about injectors though, cause it had a bit of a miss to it with the old 220cc stock injectors as well. but we replaced most of the parts in the distributor already. and it has 8.5mm plug wires. so i dont really have any other ideas.

the plan now is i want to geta skunk intake manifold as well as bigger throttle body. and i think i will go with an msd ignition too. these are all i can think of right now. the engine only had 600km on it when we dynoed. so im guessin it will net a few more ponies once it loosens up. but it is still way lower than it should be. so if anyone has any ideas please help.

sorry for the long post.

 

why dont u try replacin the injectors before u do any more mods... i would find the source of ur problem before u invest anymore money because u def have a problem someplace. hopefully ur right and its just the injectors.

sounds like a good setup though. good luck.

 

just to be on the safe side try giving it a compression test.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by kaptr1d &raquo;</TD></TR><TR><TD CLASS="quote">why dont u try replacin the injectors before u do any more mods... i would find the source of ur problem before u invest anymore money because u def have a problem someplace. hopefully ur right and its just the injectors.

sounds like a good setup though. good luck.</TD></TR></TABLE>

yes i do plan on findin the problem with the miss first. im gonna send the injectors for flow testing.

but im gonna try the other parts anyway. cause it sounds like it is not breathing well enough at high rpms. cause the tuner said that everytime they tried to give it fuel in top end. the power just goes for ****

 

makes sense.

 

gee thats wierd almost sounds like your fuel pump is fucked, do you have a fuel pressure guage , have someone watch it while on the dyno see if it dips down in pressure

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AllMotorMark &raquo;</TD></TR><TR><TD CLASS="quote">gee thats wierd almost sounds like your fuel pump is fucked, do you have a fuel pressure guage , have someone watch it while on the dyno see if it dips down in pressure</TD></TR></TABLE>

fuel pump was brand new. plus it runs fine at WOT. so i dont suspect fuel pump. but i will check on the fuel press. ive gotr a with a gauge in there. so well see.

thanx for the suggestion

 

oops i meant ive got an aem fpr with a gauge under the hood as well.

 

that sucks . i wouldnt even know where to start

 

My recommendation:
Do a compression test.
Do a leakdown test.

If your block is a 1.8L using 81mm pistons:
I honestly don't think you need 310s.
I also don't think you need a walbro 255....

Also, you shouldnt listen to a pos autometer air fuel guage.
You need a wideband o2 to truely see your a/f readings.

 

awful numbers,

what header BTW?

 

obviously something is wrong~ like stated above leakdown and compression test is what you should do first. And it's hard to analyze the dyno without the graphs. With the a/f also.

 

get a vafc and wat kind of dyno was this on

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mtber &raquo;</TD></TR><TR><TD CLASS="quote">My recommendation:
Do a compression test.
Do a leakdown test.

If your block is a 1.8L using 81mm pistons:
I honestly don't think you need 310s.
I also don't think you need a walbro 255....

Also, you shouldnt listen to a pos autometer air fuel guage.
You need a wideband o2 to truely see your a/f readings.
</TD></TR></TABLE>

its actually 82mm pistons. and when im runnin 11.5/1 compression running lean is the last thing i want to worry about. so no point in scrimping a few bucks on the fuel system for a 6g engine build.

and the a/f gauges r fairly accurate. obviously im not relying on that as my tuning source. but when im in throttle and it is reading on the rich side, and suddenly it droops right to the bottom of lean side when i have a missfire. that tells me that something is wrong with the fuel system.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by b16supertuner &raquo;</TD></TR><TR><TD CLASS="quote">awful numbers,

what header BTW?</TD></TR></TABLE>

stock header

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by xx dc2teg xx &raquo;</TD></TR><TR><TD CLASS="quote">obviously something is wrong~ like stated above leakdown and compression test is what you should do first. And it's hard to analyze the dyno without the graphs. With the a/f also.</TD></TR></TABLE>

well i can try takin a pic of the graph with my cam. and then someone would have to host it for me or something. cause i got no idea how to put pics up here.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by civic2003 &raquo;</TD></TR><TR><TD CLASS="quote">get a vafc and wat kind of dyno was this on</TD></TR></TABLE>

it was on a mustang dyno. so it is out by about 10% they have it werked out to,

and why would i scrap my hondata in favour of a vafc for tuning?? vafc is completely inferior to hondata.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by civic2003 &raquo;</TD></TR><TR><TD CLASS="quote">get a vafc and wat kind of dyno was this on</TD></TR></TABLE>

ahahahah thats the gayist quote ive ever herd

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 99b18 &raquo;</TD></TR><TR><TD CLASS="quote">stock header</TD></TR></TABLE>
That is probably a big problem right there. You are choking your those cams! Get a 2.5 inch collector header, and I bet you will see some better results

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 99b18 &raquo;</TD></TR><TR><TD CLASS="quote">

stock header</TD></TR></TABLE>

Aha. Spend some $$ on a quality header and a Skunk2 IM. That'll free up ALOT of power. I guarantee it.

 

yeah something is wrong
even if you useing the stock header the numbers should still be higher.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Skunk2nR &raquo;</TD></TR><TR><TD CLASS="quote">

Aha. Spend some $$ on a quality header and a Skunk2 IM. That'll free up ALOT of power. I guarantee it.</TD></TR></TABLE>

True very true.. but that's not the main problem..

Have you had a chance to check the injectors yet?

 

im betting it was a dyno error.

what intake manifold and throttle body are you using?

stock header.. are you kidding me! get rid of that thing already.

 

part of the problem is the header.. and possibly the catalytic converter too if you still have that.

Don't be too alarmed at the dyno numbers. check everything first, im sure there are weak points in the system that is causing the low hp.

We dynoed a TUrbo b16 on 10psi one time and it was doing only 125hp at 115tq. I couldnt believe what was going on. it was boosting and all,but whassup with the low numbers.

we figured out it was a clogged Catalytic converter. we gutted it and that solved the problem.

 

sounds to me like you have an ignition problem. what plugs do you have and what are they gapped at.. put some stock plug wires on there and close the gap on the plugs a little